JP2002374129A - Predistortion compensating circuit, predistortion compensating method, program and medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the difficulty in obtaining effect of distortion compensation over a wide output level, in conventional predistortion compensating circuits. SOLUTION: The predistortion compensating circuit is provided with a power distributor 103 for distributing an input signal; a variable power distributor 105 which performs prescribed adjustment, by using one signal out of the distributed signals and outputs a signal based on the adjusted result; a distortion generating circuit 107 for generating a distorted signal by using the signal outputted from the variable power distributor 105; a power combiner 113 for combining the other signal out of the distributed signals with the generated distorted signal; and a power amplifier 114 for amplifying the combined signal and outputting an output signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a predistortion distortion compensating circuit and a predistortion distortion compensating circuit used in a mobile communication base station such as a cellular phone.
It concerns programs and media.

[0002]

2. Description of the Related Art In recent years, a transmitter for a base station of a mobile communication device requires a power amplifier having high efficiency and high linearity to amplify a large number of signal channels at once.
In order to enhance the linearity of the power amplifier, it is essential to employ a distortion compensation circuit such as a pre-distortion method.

Here, the configuration and operation of a conventional pre-distortion distortion compensating circuit will be described with reference to FIG. 10, which is a block diagram of a conventional pre-distortion distortion compensating circuit.

In FIG. 10, reference numeral 601 denotes an input terminal;
2 is an output terminal, 603 is a power divider, 604 is a delay circuit, 605 is a distortion generation circuit, 606 is a variable attenuator, 60
7 is a variable phase shifter, 608 is a power combiner, 609 is a power amplifier, 610 is a directional coupler, and 611 is a control unit.

Such a circuit configuration is disclosed in, for example,
A circuit configuration disclosed in US Pat.
A signal having the same amplitude (dBc value) and opposite phase as the intermodulation distortion (IM) component generated by the power amplifier 609 is output from the power amplifier 60.
9, the variable attenuator 606 and the variable phase shifter 6
07, intermodulation distortion generated in the power amplifier 609 can be reduced.

Here, referring to FIGS. 11A to 11D, a case where two sine waves of frequencies f1 and f2 (f1 <f2) are input to the distortion generating circuit 605 and the power amplifier 609, respectively. Will be described.

FIG. 11A shows a distortion generating circuit 605.
11B is an explanatory diagram of the distortion phase characteristic of the distortion generating circuit 605, FIG. 11C is an explanatory diagram of the distortion amplitude characteristic of the power amplifier 609, and FIG. FIG. 11 is an explanatory diagram of a distortion phase characteristic of the amplifier 609 (FIG. 11)
The horizontal axis of (a) and (b) represents the output power of (the amplifier of) the distortion generating circuit 605, and the horizontal axis of FIGS. 11 (c) and (d) represents the output power of the power amplifier 609. FIG.
1 (a) and (c) are on the vertical axis in dBm, and FIGS. 11 (b) and 11 (d) are on the vertical axis in deg.).

When the frequency of the intermodulation distortion component generated on the low frequency side of f1 is f3 and the frequency of the intermodulation distortion component generated on the high frequency side of f2 is f4, these distortion amplitude characteristics and distortion phase characteristics are obtained. Are different. That is, the distortion amplitude characteristic and the distortion phase characteristic in the distortion generation circuit 605 and the power amplifier 609 have output level dependence.

[0009] The distortion characteristics of the distortion generating circuit and the distortion characteristics of the power amplifier are usually not the same.

[0010]

However, in the configuration of the conventional pre-distortion distortion compensation circuit (see FIG. 10), the operation level of the distortion generation circuit 605 changes in proportion to the operation level of the power amplifier 609. Therefore, it has been difficult to obtain the effect of distortion compensation over a wide output level.

More specifically, FIG.
For example, as shown in FIG.
When the operation level of No. 9 changes from P1 to P2 (for example, approximately half of P1), the operation level of the distortion generation circuit 605 changes from P3 to P4 (for example, approximately half of P3).

When the operation level of the power amplifier 609 is P1 and the operation level of the distortion generation circuit 605 is P1,
3 is approximately equal to the distortion level (ie, f
The difference between the graph values relating to the distortion amplitude and the distortion phase corresponding to the two frequencies of f3 and f4 is equal in the power amplifier 609 and the distortion generation circuit 605), so that the distortion compensation is effectively performed. However, the distortion level when the operation level of the power amplifier is P2 is significantly different from the distortion level when the operation level of the distortion generation circuit is P4 (that is, the difference between the graph values described above is different), so that the variable attenuator 6
No matter how the vector adjustment is performed in 06 and the variable phase shifter 607, distortion compensation is not sufficiently performed.

The present invention provides a pre-distortion distortion compensating circuit, a pre-distortion distortion compensating method, a program, and a medium capable of obtaining a distortion compensating effect over a wide output level in consideration of the above-mentioned conventional problems. It is intended for.

[0014]

Means for Solving the Problems The first invention (claim 1)
) Performs predetermined adjustment using signal distribution means for distributing an input signal to be input and one of the distributed signals, and outputs a signal based on the result of the adjustment. A signal adjustment unit, a distortion signal generation unit that generates a distortion signal using a signal output from the signal adjustment unit, and the other of the distributed signals and the generated distortion signal. A signal amplifying unit for amplifying the combined signal and outputting an output signal, wherein the signal adjusting unit causes the predetermined adjustment to be generated in the distortion signal generating unit. The degree of the difference in the signal amplitude of the predetermined frequency component included in the distortion signal to be obtained and the degree of the difference in the signal amplitude of the predetermined frequency component included in the distortion signal generated in the signal amplifying unit are predetermined. And / or (2) the phase difference of the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the predetermined difference included in the distortion signal generated by the signal amplification unit. This is a pre-distortion distortion compensating circuit that performs a predetermined relationship between the phase difference between the frequency components.

According to a second aspect of the present invention (corresponding to claim 2), signal variable distribution means for distributing an input signal at a variable distribution ratio, and utilizing one of the distributed signals Signal generating means for generating a distortion signal, signal synthesizing means for synthesizing the other of the divided signals and the generated distortion signal, and amplifying and outputting the synthesized signal Signal amplification means for outputting a signal, the signal variable distribution means, the change of the distribution ratio,
(1) The degree of the difference in the signal amplitude of the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the signal amplitude of the predetermined frequency component included in the distortion signal generated by the signal amplification unit And / or (2) the difference between the phase of the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the signal amplification unit. A predistortion distortion compensating circuit that performs a predetermined relationship between a phase difference of the predetermined frequency component included in the distortion signal and a predetermined difference.

According to a third aspect of the present invention (corresponding to claim 3), a signal distribution means for distributing an input signal, and one of the distributed signals and a predetermined bias voltage are used. And a distortion signal generating means for generating a distortion signal; a bias voltage control means for controlling the bias voltage; and a signal for synthesizing the other of the divided signals and the generated distortion signal. A signal amplification unit that amplifies the combined signal and outputs an output signal, wherein the bias voltage control unit controls the bias voltage in the distortion signal generation unit. The degree of the difference between the signal amplitude of the predetermined frequency component included in the distortion signal and the degree of the difference in the signal amplitude of the predetermined frequency component included in the distortion signal generated by the signal amplifying unit. There have a predetermined relationship, and /
Or (2) a phase difference between the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and a phase difference between the predetermined frequency component included in the distortion signal generated by the signal amplification unit. Is a pre-distortion distortion compensating circuit that performs a predetermined relationship.

According to a fourth aspect of the present invention (corresponding to claim 4), the degree of the difference between the signal amplitudes of predetermined frequency components included in the distortion signal generated by the distortion signal generation means and the signal amplitude generated by the signal amplification means are determined. That the degree of difference in signal amplitude of the predetermined frequency component included in the distortion signal has a predetermined relationship means that the signal amplitude of the predetermined frequency component included in the distortion signal generated by the distortion signal generating means is Wherein the difference between the dBc value of the predetermined frequency component and the difference between the dBc values of the signal amplitude of the predetermined frequency component included in the distortion signal generated by the signal amplifying means is substantially equal. This is a pre-distortion distortion compensation circuit.

A fifth aspect of the present invention (corresponding to claim 5) is that the phase difference of the predetermined frequency component included in the distortion signal generated by the distortion signal generating means and the distortion generated by the signal amplifying means are different from each other. The difference between the phase difference of the predetermined frequency component included in the signal and the predetermined relationship means that the difference between the deg value of the phase of the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the deg value The predistortion distortion compensating circuit according to any one of the first to third aspects of the present invention, wherein the difference between the deg values of the phase of the predetermined frequency component included in the distortion signal generated by the signal amplifying means is substantially equal. It is.

According to a sixth aspect of the present invention (corresponding to claim 6), the first delay circuit for adjusting the propagation delay time of the other signal distributed by the signal distribution means, and the signal amplified by the signal amplification means. Signal detection means for distributing a signal to a detection signal and an external signal; wherein the signal adjustment means detects a level of the detection signal and outputs the detected signal as a control signal; and Means for distributing one of the signals distributed by the means at a variable distribution ratio, wherein the distortion signal generating means adjusts the propagation delay time of the one signal distributed by the variable power distributor. A second delay circuit, a distortion generating circuit that generates the distortion signal by inputting the other signal distributed by the variable power distributor, and an amplitude and a position of an output signal from the distortion generation circuit. Vector adjusting means for adjusting the output signal, a power combiner for combining an output signal from the second delay circuit and an output signal from the first vector adjusting means, and an output signal from the power combiner. Second vector adjusting means for adjusting the amplitude and phase of the variable power divider and outputting the resultant signal as the distortion signal, wherein the change of the distribution ratio by the variable power distributor is performed by using the control signal. 3 is a predistortion distortion compensating circuit of the invention.

According to a seventh aspect of the present invention (corresponding to claim 7), a first delay circuit for adjusting the propagation delay time of the other signal distributed by the signal distribution means, and the signal amplified by the signal amplification means. A detection signal distribution unit that distributes a signal into a detection signal and an external signal; and a power divider that distributes one of the signals distributed by the signal distribution unit, wherein the signal adjustment unit includes the detection unit. A detector for detecting the level of the signal for use and outputting it as a control signal, and a power level adjusting means for adjusting the power level of one of the signals distributed by the power distributor, wherein the distortion signal generating means,
A second delay circuit that adjusts a propagation delay time of the other signal distributed by the power divider, and a distortion generation circuit that generates the distortion signal by inputting the signal adjusted by the power level adjustment unit. A first vector adjusting means for adjusting an amplitude and a phase of an output signal from the distortion generating circuit; and an output signal from the second delay circuit and an output signal from the first vector adjusting means. A power combiner, and a second vector adjuster that adjusts the amplitude and phase of an output signal from the power combiner and outputs the resultant signal as the distortion signal. The change in gain of the power level adjuster is controlled by the control. 1 is a diagram illustrating a predistortion distortion compensation circuit according to a first embodiment of the present invention performed using a signal.

According to an eighth aspect of the present invention (corresponding to claim 8), a first delay circuit for adjusting a propagation delay time of the other signal distributed by the signal distribution means, and a signal from the first delay circuit. A power level adjusting unit that adjusts a power level of an output signal; and a detection signal distribution unit that distributes a signal amplified by the signal amplification unit into a detection signal and an external signal. A detector for detecting a level of the detection signal and outputting the detected signal as a control signal, a variable power distributor for variably distributing the input signal, and distributing one of the signals distributed by the variable power distributor. A power divider, wherein the distortion signal generating means adjusts a propagation delay time of one of the signals distributed by the power distributor, and a second delay circuit that is distributed by the power distributor. A distortion generating circuit that generates the distortion signal by inputting a signal, first vector adjusting means for adjusting the amplitude and phase of an output signal from the distortion generating circuit, and an output signal from the second delay circuit And a power combiner that combines the output signal from the first vector adjuster and a second vector adjuster that adjusts the amplitude and phase of the output signal from the power combiner and outputs the resultant signal as the distortion signal. The predistortion distortion compensating circuit according to a second aspect of the present invention, wherein the change of the distribution ratio and the change of the gain of the power level adjusting means by the signal variable distribution means are performed using the control signal.

According to a ninth aspect of the present invention (corresponding to claim 9), the first delay circuit for adjusting the propagation delay time of the other signal distributed by the signal distribution means and the signal amplified by the signal amplification means. Signal detection means for distributing the signal to a detection signal and a signal to the outside, the bias voltage control means has a detector for detecting the level of the detection signal and outputting as a control signal, The distortion signal generating unit includes a power divider that distributes one of the signals distributed by the signal distributor, and a second delay circuit that adjusts a propagation delay time of the one signal distributed by the power distributor. A distortion generating circuit that generates the distortion signal by inputting the other signal distributed by the power distributor, and a first circuit that adjusts an amplitude and a phase of an output signal from the distortion generating circuit. Vector adjusting means, a power combiner for combining an output signal from the second delay circuit with an output signal from the first vector adjusting means, and adjusting an amplitude and a phase of the output signal from the power combiner. A pre-distortion distortion compensating circuit according to a third aspect of the present invention, further comprising a second vector adjusting unit for outputting the distortion signal as the distortion signal, wherein the control of the bias voltage is performed using the control signal.

According to a tenth aspect of the present invention (corresponding to claim 10),
A detection signal distribution unit that distributes an external signal to the input signal and the detection signal, and a first delay circuit that adjusts a propagation delay time of the other signal distributed by the signal distribution unit. The signal adjusting unit includes a detector that detects a level of the detection signal and outputs the detected signal as a control signal, and a variable power splitter that splits one of the signals split by the signal splitting unit. The means includes: a second delay circuit that adjusts a propagation delay time of one signal distributed by the variable power distributor; and a second delay circuit that inputs the other signal distributed by the variable power distributor to convert the distortion signal. A distortion generating circuit to generate the signal; first vector adjusting means for adjusting an amplitude and a phase of an output signal from the distortion generating circuit; an output signal from the second delay circuit; A power combiner that combines an output signal from the torque combiner, and a second vector adjuster that adjusts the amplitude and phase of the output signal from the power combiner and outputs the resultant signal as the distortion signal. The change of the distribution ratio by the power divider is a predistortion distortion compensating circuit according to the first aspect of the present invention, which is performed using the control signal.

According to an eleventh aspect of the present invention (corresponding to claim 11),
The predistortion distortion compensating circuit according to any one of the sixth to tenth aspects of the present invention, further comprising a storage device for storing data used for generating the control signal.

The twelfth invention (corresponding to claim 12) provides:
The power level adjusting means is a pre-distortion distortion compensating circuit according to the seventh or eighth aspect of the present invention, which is configured using a variable gain amplifier or a variable attenuator.

According to a thirteenth aspect of the present invention (corresponding to claim 13),
The variable power divider is a predistortion distortion compensating circuit according to any one of the sixth to tenth aspects of the present invention, which is configured using a variable coupling degree directional coupler.

According to a fourteenth aspect of the present invention (corresponding to claim 14),
The delay circuit is a pre-distortion distortion compensating circuit according to any one of the sixth to tenth aspects of the present invention configured using a filter.

According to a fifteenth aspect of the present invention (corresponding to claim 15),
First power distribution means for distributing the input signal, first propagation time delay means for adjusting the propagation delay time of the signal distributed by the first power distribution means, and distribution by the first power distribution means Power distribution means for distributing the divided signal, second propagation time delay means for adjusting the propagation delay time of the signal distributed by the second power distribution means, and second power distribution means. Distortion generating means for generating a distortion signal by inputting the distributed signal,
A first vector adjustment unit that adjusts the amplitude and phase of an output signal from the distortion generation unit, an output signal from the second propagation time delay unit, and an output signal from the first vector adjustment unit are combined. A first power synthesizing unit, a second vector adjusting unit for adjusting an amplitude and a phase of an output signal from the first power synthesizing unit, an output signal from the first propagation time delay unit, A second power combining means for combining output signals from the second vector adjusting means, a power amplifying means for amplifying an output signal from the second power combining means, and an output signal from the power amplifying means. Third power distribution means, and detection means for detecting the level of the signal distributed by the third power distribution means,
The second power distribution means is capable of changing a power distribution ratio by a control signal, and supplies a control signal to at least one of the second power distribution means and the distortion generating circuit; A predistortion distortion compensation circuit characterized in that the control signal is supplied from an output of the detection means.

According to a sixteenth aspect of the present invention (corresponding to claim 16),
A first power distribution unit that distributes an input signal; a first propagation time delay unit that adjusts a propagation delay time of a signal distributed by the first power distribution unit; and a first propagation time delay unit. Power level adjusting means for adjusting the power level of the output signal, second power distributing means for distributing the signal distributed by the first power distributing means, and a signal distributed by the second power distributing means. Second propagation time delay means for adjusting the propagation delay time of the signal, distortion generation means for generating a distortion signal by inputting a signal distributed by the second power distribution means, and output from the distortion generation means First vector adjusting means for adjusting the amplitude and phase of the signal; first signal for synthesizing an output signal from the second propagation time delay means and an output signal from the first vector adjusting means; Force combining means, second vector adjusting means for adjusting the amplitude and phase of the output signal from the first power combining means, output signal from the power level adjusting means, and output from the second vector adjusting means. Second power combining means for combining the output signal, power amplifying means for amplifying the output signal from the second power combining means, and third power distributing means for distributing the output signal from the power amplifying means. Detecting means for detecting a level of a signal distributed by the third power distribution means, wherein a power distribution ratio of the first power distribution means and a gain of the power level adjustment means are changed by a control signal. And supplying a control signal to at least one of the first power distribution means, the power level adjusting means, and the distortion generating circuit, and transmitting the control signal to the output of the detection means. A predistortion distortion compensation circuit, characterized by further supply.

The seventeenth invention (corresponding to claim 17) is:
First power distribution means for distributing the input signal, first propagation time delay means for adjusting the propagation delay time of the signal distributed by the first power distribution means, and distribution by the first power distribution means Power distribution means for distributing the divided signal, second propagation time delay means for adjusting the propagation delay time of the signal distributed by the second power distribution means, and second power distribution means. Power level adjusting means for adjusting the power level of the distributed signal, distortion generating means for generating a distortion signal by inputting the signal distributed by the power level adjusting means, and output signal from the distortion generating means. A first vector adjustment unit that adjusts amplitude and phase; a second signal that combines an output signal from the second propagation time delay unit and an output signal from the first vector adjustment unit. Power combining means, second vector adjusting means for adjusting the amplitude and phase of an output signal from the first power combining means, an output signal from the first propagation time delay means, and a second vector A second power combining unit that combines the output signal from the adjusting unit, a power amplifying unit that amplifies the output signal from the second power combining unit, and a third unit that distributes the output signal from the power amplifying unit. Power distribution means, and detection means for detecting the level of the signal distributed by the third power distribution means, wherein the gain of the power level adjustment means can be changed by a control signal, and the control signal Is supplied from the output of the detection means.

According to an eighteenth aspect of the present invention (corresponding to claim 18),
First power distribution means for distributing the input signal, first propagation time delay means for adjusting the propagation delay time of the signal distributed by the first power distribution means, and distribution by the first power distribution means Power distribution means for distributing the divided signal, second propagation time delay means for adjusting the propagation delay time of the signal distributed by the second power distribution means, and second power distribution means. Distortion generating means for generating a distortion signal by inputting the distributed signal,
A first vector adjustment unit that adjusts the amplitude and phase of an output signal from the distortion generation unit, an output signal from the second propagation time delay unit, and an output signal from the first vector adjustment unit are combined. A first power synthesizing unit, a second vector adjusting unit for adjusting an amplitude and a phase of an output signal from the first power synthesizing unit, an output signal from the first propagation time delay unit, A second power combining means for combining output signals from the second vector adjusting means, a power amplifying means for amplifying an output signal from the second power combining means, and an output signal from the power amplifying means. Third power distribution means, and detection means for detecting the level of the signal distributed by the third power distribution means,
A predistortion distortion compensation circuit characterized in that a bias voltage of the distortion generating means can be changed by a control signal, and the control signal is supplied from an output of the detection means.

According to a nineteenth aspect of the present invention (corresponding to claim 19),
First power distribution means for distributing the input signal, second power distribution means for distributing the signal distributed by the first power distribution means, and propagation of the signal distributed by the second power distribution means First propagation time delay means for adjusting the delay time, third power distribution means for distributing the signal distributed by the second power distribution means, and signal distribution by the third power distribution means. A second propagation time delay unit for adjusting a propagation delay time, a distortion generation unit for generating a distortion signal by inputting a signal distributed by the third power distribution unit, and an output signal from the distortion generation unit Vector adjusting means for adjusting the amplitude and phase of the signal, a first power combining means for combining an output signal from the second propagation time delay means and an output signal from the first vector adjusting means. A second vector adjusting means for adjusting an amplitude and a phase of an output signal from the first power combining means; an output signal from the first propagation time delay means; and a second vector adjusting means. Second power synthesizing means for synthesizing the output signal of the second power synthesizing means, power amplifying means for amplifying the output signal from the second power synthesizing means, and detecting the level of the signal distributed by the first power distribution means. A detecting means, wherein the third power distribution means is capable of changing a power distribution ratio by a control signal, and controls at least one of the third power distribution means and the distortion generating circuit. A pre-distortion distortion compensating circuit, wherein a signal is supplied and a control signal is supplied from an output of the detection means.

According to a twentieth aspect of the present invention (corresponding to claim 20),
Based on the result of the predetermined adjustment, (1) control for adjusting the amplitude and phase of the output signal from the distortion generating circuit to the first vector adjustment means, and (2) the second vector The predistortion distortion compensating circuit according to any one of the sixth, seventh, and tenth aspects of the present invention, further comprising a control circuit for performing control for adjusting an amplitude and a phase of an output signal from the power combiner to an adjusting unit. is there.

According to the twenty-first aspect of the present invention (claim 21), based on the result of the change of the distribution ratio, (1) the amplitude and the phase of the output signal from the distortion generating circuit to the first vector adjusting means are adjusted. And (2) a control circuit for controlling the second vector adjustment means to adjust the amplitude and phase of the output signal from the power combiner. This is a distortion distortion compensation circuit.

According to a twenty-second aspect of the present invention (corresponding to claim 22),
On the basis of the result of the control of the bias voltage, (1) control for adjusting the amplitude and phase of the output signal from the distortion generating circuit with respect to the first vector adjustment means;
And (2) a predistortion distortion compensating circuit according to a ninth aspect of the present invention including a control circuit for controlling the amplitude and phase of the output signal from the power combiner for the second vector adjusting means. is there.

According to a twenty-third aspect of the present invention (corresponding to claim 23),
A signal distribution step of distributing an input signal that is input, a distortion signal generation step of generating a distortion signal using one of the divided signals, and the other of the divided signals. A signal combining step of combining a signal and the generated distortion signal, and a signal amplifying step of amplifying the combined signal and outputting an output signal;
The input power and / or bias voltage used in the distortion signal generation step are determined by: (1) the degree of difference in signal amplitude of a predetermined frequency component included in the distortion signal generated in the distortion signal generation step and the signal amplification The degree of the difference in signal amplitude of the predetermined frequency component included in the distortion signal generated in the step has a predetermined relationship, and / or (2) included in the distortion signal generated in the distortion signal generation step A control step of controlling the phase difference of the predetermined frequency component and the phase difference of the predetermined frequency component included in the distortion signal generated in the signal amplification step to have a predetermined relationship. This is a distortion distortion compensation method.

According to a twenty-fourth aspect of the present invention (corresponding to claim 24),
A signal distributing step of distributing an input signal in the predistortion distortion compensating method according to the twenty-third aspect of the present invention; and a distortion signal generating step for generating a distortion signal using one of the distributed signals. A signal synthesizing step of synthesizing the other of the distributed signals and the generated distortion signal; a signal amplifying step of amplifying the synthesized signal and outputting an output signal; The input power and / or bias voltage used in the distortion signal generation step are determined by: (1) the degree of difference in signal amplitude of a predetermined frequency component included in the distortion signal generated in the distortion signal generation step and the signal amplification step Has a predetermined relationship with the degree of difference in signal amplitude of the predetermined frequency component included in the distortion signal generated in, And / or (2) a phase difference between the predetermined frequency component included in the distortion signal generated in the distortion signal generation step and a phase of the predetermined frequency component included in the distortion signal generated in the signal amplification step This is a program for causing a computer to execute all or a part of the control steps for controlling the difference between the two to have a predetermined relationship.

According to a twenty-fifth aspect of the present invention (corresponding to claim 25),
A medium carrying the program of the twenty-fourth aspect of the present invention,
A medium that can be processed by a computer.

[0039]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) First, the configuration of a pre-distortion distortion compensating circuit according to Embodiment 1 will be described with reference to FIG. In addition, FIG.
FIG. 3 is a block diagram of a pre-distortion distortion compensating circuit according to the present embodiment.

In FIG. 1, reference numeral 101 denotes an input terminal;
Is an output terminal, 103 is a power divider, 104 and 106 are delay circuits, 105 is a variable power divider, 107 is a distortion generating circuit, 108 and 111 are variable attenuators, 109 and 112 are variable phase shifters, and 110 and 113 are A power combiner, 114 is a power amplifier, 115 is a directional coupler, and 116 is a detector.

As the variable power distributor 105, for example, a directional coupler whose coupling degree can be changed by a control voltage is used. Further, the distortion generating circuit 107 and the power amplifier 114 include, for example, an FET (field effect transistor, field effect transistor).
or). Also, delay circuit 1
For example, coaxial cables such as semi-rigid cables are used for 04 and 106.

The input terminal 101 is connected to the input of the power divider 103, and one end of the output of the power divider 103 is connected to one end of the input of the power combiner 113 via the delay circuit 104. On the other hand, the other end of the output of power divider 103 is connected to the input of variable power divider 105.

One end of the output of variable power distributor 105 is connected to one end of the input of power combiner 110 via delay circuit 106. On the other hand, the other end of the output of the variable power divider 105 is connected to the other end of the input of the power combiner 110 via the distortion generating circuit 107, the variable attenuator 108, and the variable phase shifter 109.

The output of the power combiner 110 is the variable attenuator 1
11, is connected to the other end of the input of the power combiner 113 via the variable phase shifter 112. The output of the power combiner 113 is connected to the output terminal 102 via the power amplifier 114 and the directional coupler 115. The coupling terminal of the directional coupler 115 is connected to the detector 116, and its output is
05 is input to the control terminal.

The power distributor 103 according to the present embodiment
Corresponds to the signal distribution means of the present invention (first present invention). The means including the variable power distributor 105 and the detector 116 of the present embodiment corresponds to the signal adjusting means of the present invention (first present invention). The means including the distortion generating circuit 107 of the present embodiment corresponds to the distortion signal generating means of the present invention (first present invention). Further, power combiner 113 of the present embodiment corresponds to the signal combining means of the present invention (first present invention). Further, the power amplifier 114 of the present embodiment
Corresponds to the signal amplification means of the present invention (first present invention).

The operation of the power distributor 103 according to the present embodiment corresponds to the signal distribution step of the present invention. Also,
The operation of the means including the distortion generation circuit 107 of the present embodiment corresponds to the distortion signal generation step of the present invention. Also,
The operation of the power combiner 113 of the present embodiment corresponds to the signal combining step of the present invention. The operation of the power amplifier 114 according to the present embodiment corresponds to a signal amplification step according to the present invention. Also, the variable power distributor 105 of the present embodiment,
The operation of the means including the detector 116 corresponds to the control step of the present invention.

The directional coupler 115 corresponds to the detection signal distribution means of the present invention. Also, the variable attenuator 108
The means including the variable phase shifter 109 corresponds to the first vector adjusting means of the present invention. Also, the variable attenuator 111
The means including the variable phase shifter 112 corresponds to the second vector adjusting means of the present invention. The input signal from the input terminal 101 in the present embodiment corresponds to the input signal of the present invention.

Next, the operation of the pre-distortion distortion compensating circuit according to the present embodiment will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 2A is an explanatory diagram of the frequency spectrum of the signal at the terminal a.
2B is an explanatory diagram of a frequency spectrum of a signal at a terminal b, FIG. 2C is an explanatory diagram of a frequency spectrum of a signal at a terminal c, and FIG. 2D is a diagram of a frequency spectrum of a signal at a terminal d. It is explanatory drawing, FIG.
(E) is an explanatory diagram of the frequency spectrum of the signal at the terminal e, FIG. 2 (f) is an explanatory diagram of the frequency spectrum of the signal at the terminal f, and FIG. 2 (g) is an explanatory diagram of the frequency spectrum of the signal at the terminal g. It is explanatory drawing, FIG.
(H) is an explanatory diagram of the frequency spectrum of the signal at the terminal h.

FIG. 2 shows a frequency spectrum of a signal at each terminal of the circuit (see FIG. 1). In the present embodiment, two sine waves (carriers) having frequencies f1 and f2 are applied to input terminal 101. Consider the case where is input.

The signal input to the input terminal 101 is split into two by the power splitter 103. One of the two output signals is input to the terminal a of the power combiner 113 through the delay circuit 104. The signal spectrum is shown in FIG.
Indicated by

On the other hand, the other output signal of power divider 103 is further divided into two by variable power divider 105, and one of the output signals is passed through delay circuit 106 to power combiner 11.
0 is input to the terminal b. The signal spectrum is shown in FIG. The feature of the present embodiment is that the distribution ratio of the variable power distributor 105 is appropriately changed.

The output signal at the terminal c of the variable power distributor 105 having the frequency spectrum shown in FIG. Then, intermodulation distortion components f3 and f4 are generated, and the distortion generation circuit 107
Output a signal including intermodulation distortion components f3 and f4. The amplitude and phase of the output signal are adjusted by the variable attenuator 108 and the variable phase shifter 109, and the spectrum shown in FIG. 2D is input to the terminal d of the power combiner 110.

At this time, the frequencies f1, f at the terminal b
2 and the signals of the frequencies f1 and f2 at the terminal d have the same amplitude and opposite phase.

As a result, the carrier is suppressed from the output (terminal e) of the power combiner 110, and the intermodulation distortion component f
3, only f4 is output. FIG. 2E shows the signal spectrum.

The intermodulation distortion components f3 and f4 at the terminal e are
The amplitude and phase are adjusted by the variable attenuator 111 and the variable phase shifter 112, and input to the terminal f of the power combiner 113.
This signal spectrum is shown in FIG. The signal at terminal a and the signal at terminal f are combined by power combiner 113 and output from output terminal g. Figure 2 shows the signal spectrum.
(G).

By the way, the frequency f
When two sine waves (carriers) 1 and f2 are input, a signal including intermodulation distortion components f3 and f4 is output. The frequency spectrum at the output of the power amplifier 114 at this time is shown in FIG. FIG. 3 is an explanatory diagram of the amplification characteristics of the power amplifier 114.

Accordingly, the intermodulation distortion component at the terminal g shown in FIG. 2 (g) and the relative level of the intermodulation distortion component shown in FIG.
By setting the phase of the intermodulation distortion component with respect to the carrier at the moment when the instantaneous phases of 1, 1 and f2 become the same in FIG. 2 (g) and FIG. 3, the power amplifier 114 (see FIG. 1) The modulation distortion components f3 and f4 are suppressed, and only the carrier components f1 and f2 are output at a desired level. FIG.
2 (h) shows the signal spectrum at the terminal h.

By doing so, the intermodulation distortion component generated in power amplifier 114 at an arbitrary power level can be effectively suppressed.

The signal at the terminal h is supplied to the directional coupler 115.
, And most of the signal is output from the output terminal 102, and a part of the signal is extracted from the coupling terminal i. The signal at the terminal i is used by the detector 116 to detect the power level, and the power distribution ratio of the variable power distributor 105 is changed according to the detected level.

As described above, by changing the distribution ratio of variable power distributor 105 according to the output level, the operation level of distortion generating circuit 107 can be arbitrarily set independently of the input signal level and the operation level of power amplifier 114. Can be set.

Power amplifier 114 and distortion generating circuit 10
The intermodulation distortion characteristics when two sine waves are input to each of the reference numerals 7 are the intermodulation distortion characteristics in the above-described distortion generation circuit 605 and power amplifier 609 (FIG. 11A to FIG. 11A).
(See (d)).

Here, P1 = 45 dBm, P2 = 35d
Bm, P3 = 20 dBm, P4 = 10 dBm, P5 = 1
A specific description will be given of the case of 7 dBm.

For example, when the operation level of the power amplifier 114 drops from P1 = 45 dBm to P2 = 35 dBm, this is detected by the detector 116 and the distribution ratio of the variable power distributor 105 is changed to generate distortion. A larger signal is distributed to the circuit 104. Then, the operation level of the distortion generating circuit 104 is changed from P3 = 20 dBm to P5 =
17 dBm (P3 = 20 dBm to P4 = 1 as in the conventional case where the distribution ratio is fixed).
0dBm).

Then, the distortion characteristic of distortion generating circuit 104 and the distortion characteristic of power amplifier 114 remain substantially the same even after the distribution ratio is changed.

In the case where the distortion amplitude characteristic greatly changes according to the operation level as in the present embodiment (see FIGS. 11A and 11C), the distortion generation circuit 10
The amount of change in the distribution ratio may be determined so that the distortion amplitude characteristics of the power amplifier 4 and the power amplifier 114 remain substantially the same. In fact, the distortion generating circuit 104 and the power amplifier 114
Does not change so much according to the operation level (see FIGS. 11B and 11D), and thus remains almost the same even after the distribution ratio is changed.

Of course, when the distortion phase characteristic greatly changes according to the operation level, the amount of change in the distribution ratio may be determined so that the distortion phase characteristic remains substantially the same.

As described above, in the present embodiment, even when the operation level of power amplifier 114 changes from P1 to P2, the distribution ratio of variable power distributor 105 is appropriately changed regardless of the amount of change. As a result, the operation level of the distortion generation circuit is set to the optimum point P5 (FIGS.
And the operating level of the power amplifier 114 is P2
, The distortion level of the power amplifier and the distortion level of the distortion generating circuit can be made substantially equal. Thus, even when the operation level of the power amplifier 114 changes, a distortion compensation effect can be obtained efficiently, and a distortion compensation circuit having a wide dynamic range can be realized.

In this embodiment, the distortion generation circuit 1
Although the FET is used for the power amplifier 07 and the power amplifier 114, the invention is not limited to this. For both, a bipolar transistor may be used. Further, the distortion generating circuit can be configured using a diode.
The same effect as in the present embodiment can be obtained.

In this embodiment, the delay circuit 10
Although a coaxial cable such as a semi-rigid cable is used for 4 and 106, it may be formed by using another transmission line such as a microstrip line, or a delay filter may be used. Further, the present invention is not limited to the delay circuit having a fixed propagation delay time as used in the present embodiment, and it is also possible to use a delay circuit that can change the delay time, such as a variable delay filter.

Also, in the present embodiment, the distribution ratio of variable power distributor 105 is changed using the output signal from detector 116, but instead, the ratio between detector 116 and variable power distributor 105 is changed. A storage device is interposed between the variable power divider and a setting for inputting a control signal corresponding to the output power level to the variable power divider is stored in the storage device, and the control signal corresponding to the output power level is stored in the variable power divider. Can also be entered. Even in this case, the same effect as in the present embodiment can be obtained.

Further, based on the result of adjusting the signal input from the variable power distributor 105 to the distortion generation circuit 107,
(1) For the variable attenuator 108 and the variable phase shifter 109,
Control for adjusting the amplitude and phase of the output signal from the distortion generation circuit 107, and (2) the variable attenuator 111,
Control for adjusting the amplitude and phase of the output signal from power combiner 110 may be performed on variable phase shifter 112.

For example, in the present embodiment, the detector 11
6 is used to control the distribution ratio of the variable power distributor 105, but is not limited to this, and the output signals from the detector 116 are used to control the variable attenuators 108 and 111 and the variable phase shifter 109. , 112, and the delay circuit 104.

More specifically, as shown in FIG. 12, the power level of the signal extracted from directional coupler 115 to change the distribution ratio of variable power distributor 105 is determined by level detector 201. Is stored in the memory 202 in advance so that a control signal corresponding to the detection result is input not only to the variable power divider 105 but also to the variable attenuators 108 and 111 and the variable phase shifters 109 and 112. The control circuit 116 'for implementing the above-described control
May be used. FIG. 12 is a block diagram of a pre-distortion distortion compensating circuit including a control circuit 116 'according to the embodiment of the present invention.

By appropriately controlling the variable attenuator 108 and the variable phase shifter 109 so that the carrier components of the output signal from the distortion generating circuit 107 and the signal passing through the delay circuit 106 have the same amplitude and opposite phase, the variable Power distributor 1
Even after changing the distribution ratio of 05, only the distortion signal can be more accurately extracted from the power combiner 110.

Of course, the variable attenuator 111, so that the signal amplified by the power amplifier 114 becomes only a carrier component,
It goes without saying that the variable phase shifter 112 is controlled to inject an appropriate distortion signal into the power combiner 113.

(Embodiment 2) Next, Embodiment 2
The configuration and operation of the pre-distortion distortion compensating circuit will be described with reference to FIG. In addition,
FIG. 4 is a block diagram of the pre-distortion distortion compensating circuit according to the present embodiment. The pre-distortion distortion compensating circuit of the present embodiment has a configuration similar to that of the above-described pre-distortion distortion compensating circuit of the first embodiment, and the same reference numerals are given to the same means in both drawings. .

However, in the above-described first embodiment, the power distributor 105 that can change the power distribution ratio is used, but in the present embodiment, the variable power distributor 105 is used.
Is replaced with a power divider 121, and the distortion generation circuit 10
7, a variable attenuator 122 is inserted on the input side.

That is, the coupling terminal i of the directional coupler 115
The signal extracted in step (1) is used to detect the power level by the detector 116, and the amount of attenuation of the variable attenuator 122 is changed according to the detected level.

Therefore, similar to the first embodiment,
Regardless of the input signal level and the operation level of the power amplifier 114, the operation level of the distortion generation circuit 107 can be set arbitrarily. As a result, the operation level of the distortion generation circuit 107 can be set so that distortion can be suppressed most effectively with respect to the operation level of the power amplifier 114. Thus, a distortion compensation effect can be obtained even when the operation level of the power amplifier 114 changes, and a distortion compensation circuit having a wide dynamic range can be realized.

In the present embodiment, the variable attenuator 122 is provided on the input side of the distortion generating circuit 107, and the operating point of the distortion generating circuit 107 is changed by changing the amount of attenuation. , A variable gain amplifier may be used instead of the variable attenuator 122. For example, the amount of attenuation in the variable attenuator 122 (see FIG. 4) is set to 0.
Although the required operation level of the distortion generation circuit 107 may be higher than the case of dB, in such a case, by using a variable gain amplifier instead of the variable attenuator 122, the same as in the present embodiment is obtained. The effect of is obtained.

In the present embodiment, the distortion generation circuit 1
Although FETs are used for the power amplifier 07 and the power amplifier 114, bipolar transistors can be used for both. Further, a diode can be used for the distortion generating circuit. Even in this case, the same effect as in the present embodiment can be obtained.

In the present embodiment, the distribution ratio of the variable attenuator 122 is changed using the output signal from the detector 116. Instead, the detector 116 and the variable attenuator 1 are changed.
22, a setting for inputting a control signal according to the output power level to the variable attenuator is stored in the storage device, and the control signal according to the output power level is variably attenuated. It is also possible to input to the vessel. Even in this case, the same effect as in the present embodiment can be obtained.

In the present embodiment, the distribution ratio of the variable attenuator 122 is controlled using the output signal from the detector 116. However, the present invention is not limited to this, and the output signal from the detector 116 is used. , Variable attenuators 108 and 111, variable phase shifter 1
09, 112 and the delay circuit 104 can also be controlled.

The power distributor 103 according to the present embodiment
Corresponds to the signal distribution means of the present invention (first present invention). In addition, the detector 116 and the variable attenuator 1
Means including 22 correspond to the signal adjusting means of the present invention (first present invention). Further, the distortion generation circuit 1 of the present embodiment
Means including 07 correspond to the distortion signal generating means of the present invention (first present invention). Further, power combiner 113 of the present embodiment corresponds to the signal combining means of the present invention (first present invention). The power amplifier 114 according to the present embodiment corresponds to the signal amplifying unit according to the present invention (first invention).

The operation of the power distributor 103 according to the present embodiment corresponds to the signal distribution step of the present invention. Also,
The operation of the means including the distortion generation circuit 107 of the present embodiment corresponds to the distortion signal generation step of the present invention. Also,
The operation of the power combiner 113 of the present embodiment corresponds to the signal combining step of the present invention. The operation of the power amplifier 114 according to the present embodiment corresponds to a signal amplification step according to the present invention. The operation of the means including the detector 116 and the variable attenuator 122 according to the present embodiment corresponds to the control step of the present invention.

The variable attenuator 122 corresponds to the power level adjusting means of the present invention (seventh present invention).

(Embodiment 3) Next, Embodiment 3
The configuration and operation of the pre-distortion distortion compensating circuit will be described with reference to FIG. In addition,
FIG. 5 is a block diagram of the pre-distortion distortion compensating circuit according to the present embodiment. The pre-distortion distortion compensating circuit of the present embodiment has a configuration similar to that of the above-described pre-distortion distortion compensating circuit of the first embodiment. .

However, in this embodiment, the input terminal 10
Variable power splitter 1 to the power splitter that splits the signal from
05 is used, a variable gain amplifier 131 is inserted at the output side of the delay circuit 104, and the power divider 103 having a fixed distribution ratio is used as a power divider for further distributing the distribution signal from the variable power divider. Have been.

Therefore, by making the portion for distributing the signal from the input terminal variable, the operation level of the distortion generating circuit 107 can be optimized with respect to the operation level of the power amplifier 114. Further, when the distribution ratio of the distributor 105 is changed, the carrier level output to the delay circuit 104 may be reduced. In this case, the carrier level is amplified by the variable gain amplifier 131 to a desired level. I do.

Thus, as in the case of the first embodiment described above, regardless of the input signal level and the operation level of power amplifier 114, distortion generating circuit 1
07 can be set arbitrarily. As a result, the operation level of the distortion generation circuit 107 can be set so that distortion can be suppressed most effectively with respect to the operation level of the power amplifier 114. Thus, even when the operation level of the power amplifier 114 changes, a distortion compensation effect can be obtained, and a distortion compensation circuit having a wide dynamic range can be realized.

In the present embodiment, the operation level of the distortion generating circuit 107 is changed by using the power distributor 105 having a variable distribution ratio as the distributor for distributing the signal from the input terminal 101, and the delay circuit 104 A variable gain amplifier 131 is provided on the output side of the amplifier, and the input level to the power amplifier 114 is amplified to a desired level by changing the gain. However, a variable attenuator may be used instead of the variable gain amplifier 131. Conceivable. For example, the required operating level of the power amplifier 114 may be lower than when the gain of the variable gain amplifier 131 (see FIG. 5) is 0 dB. By using an attenuator,
The same effect as in the present embodiment can be obtained.

In the present embodiment, the distortion generation circuit 1
Although FETs are used for the power amplifier 07 and the power amplifier 114, bipolar transistors can be used for both. Further, a diode can be used for the distortion generating circuit. Even in this case, the same effect as in the present embodiment can be obtained.

Further, in the present embodiment, the distribution ratio of variable power divider 105 and the gain of variable gain amplifier 131 are changed using the output signal from detector 116. A storage device is inserted between the variable power divider 105 and the variable gain amplifier 131, and a setting for inputting a control signal corresponding to the output power level to the variable power divider and the variable gain amplifier is stored in the storage device. In addition, it is also possible to input a control signal according to the output power level to the variable power distributor and the variable gain amplifier. Even in this case, the same effect as in the present embodiment can be obtained.

Further, based on the result of the variable distribution ratio change in the variable power distributor 105, (1) the variable attenuator 1
08, distortion generating circuit 107 for variable phase shifter 109
For adjusting the amplitude and phase of the output signal from the controller, and (2) the variable attenuator 111 and the variable phase shifter 112
May be controlled to adjust the amplitude and phase of the output signal from the power combiner 110 with respect to. For example, in the present embodiment, the distribution ratio of variable power divider 105 is controlled using the output signal from detector 116, but the present invention is not limited to this. Attenuators 108, 111, variable phase shifters 109, 1
12 and the delay circuit 104 can also be controlled.

Note that the power distributor 103 of the present embodiment
The means including the variable power distributor 105 and the detector 116 corresponds to the signal variable distribution means of the present invention (second invention).
The means including the distortion generation circuit 107 of the present embodiment corresponds to the distortion signal generation means of the present invention (second invention). Further, power combiner 113 of the present embodiment corresponds to a signal combining unit of the present invention (second present invention). Also,
The power amplifier 114 of the present embodiment corresponds to the signal amplifying unit of the present invention (second present invention).

The power distributor 103 according to the present embodiment
The operation of the means including the variable power distributor 105 corresponds to the signal distribution step of the present invention. The operation of the means including the distortion generation circuit 107 of the present embodiment corresponds to the distortion signal generation step of the present invention. The operation of power combiner 113 of the present embodiment corresponds to the signal combining step of the present invention. The operation of the power amplifier 114 according to the present embodiment corresponds to a signal amplification step according to the present invention. The operation of the means including the detector 116 of the present embodiment corresponds to the control step of the present invention.

The variable gain amplifier 131 corresponds to the power level adjusting means of the present invention (eighth present invention).

(Embodiment 4) Next, Embodiment 4
The configuration and operation of the pre-distortion distortion compensating circuit will be described with reference to FIG. In addition,
FIG. 6 is a block diagram of the pre-distortion distortion compensating circuit according to the present embodiment. The pre-distortion distortion compensating circuit of the present embodiment has a configuration similar to that of the above-described pre-distortion distortion compensating circuit of the first embodiment. .

However, in the present embodiment, the detector 116
The bias voltage of the distortion generating circuit 107 is changed using the signal obtained by detecting the output level in
07, the saturation output power and distortion characteristics of the distortion generation circuit 107 are changed. Thus, by changing the input power level, the distortion generation circuit 1
It is possible to change the operation level of the distortion generating circuit 107 equivalently to the above-described case of changing the operation level of 07.

Therefore, similar to the first embodiment,
Regardless of the input signal level and the operation level of the power amplifier 114, the operation level of the distortion generation circuit 107 can be arbitrarily set arbitrarily. As a result, the operation level of the distortion generation circuit 107 can be set so that distortion can be suppressed most effectively with respect to the operation level of the power amplifier 114. Thus, a distortion compensation effect can be obtained even when the operation level of the power amplifier 114 changes, and a distortion compensation circuit having a wide dynamic range can be realized. Further, in the present embodiment, since the DC operation condition of the distortion generating circuit 107 is directly changed, no additional parts are required, and the above-described first to third embodiments are not necessary.
The device can be made smaller than in the case of 3.

In this embodiment, the distortion generation circuit 1
Although FETs are used for the power amplifier 07 and the power amplifier 114, bipolar transistors can be used for both. Further, a diode can be used for the distortion generating circuit. Even in this case, the same effect as in the present embodiment can be obtained.

In the present embodiment, the power distributor 10
Although power dividers having fixed distribution ratios are used for the power supply units 3 and 121, similar to the first and third embodiments described above, FIGS.
As shown in FIG. 8, it is also possible to use a variable power divider for one or both of the power dividers. FIG. 7 shows the variable power divider 1
FIG. 8 is a block diagram of a modified example of the present embodiment using a variable power distributor 105 as the power distributor 103. FIG. The variable gain power amplifier 1 is connected to the output side of the circuit 104.
31 is also inserted).

In such a case (see FIGS. 7 and 8), both the variable power distributor 105 and the distortion generation circuit 107 are controlled using the signal obtained from the detector 116, and the distortion generation is performed. Since both the power level input to the circuit 107 and the DC operation condition of the distortion generating circuit 107 can be changed, the control for performing the distortion suppression can be performed more strictly with respect to the output level of the power amplifier 114. Will be possible. Also, a variable attenuator can be used for the variable gain power amplifier 131 as in the case of the third embodiment described above.

Further, based on the result of the change in the bias voltage, (1) control for adjusting the amplitude and phase of the output signal from the distortion generating circuit 107 to the variable attenuator 108 and the variable phase shifter 109; 2) Variable attenuator 11
1. Control may be performed on the variable phase shifter 112 to adjust the amplitude and phase of the output signal from the power combiner 110. For example, in the present embodiment, the detector 11
6, the bias voltage of the distortion generating circuit 107 is changed using the output signal from the output signal from the detector 116.
A storage device is inserted between the distortion generation circuit 107 and a setting for inputting a control signal corresponding to the output power level to a bias terminal of the distortion generation circuit is stored in the storage device. It is also possible to input a corresponding control signal to the distortion generating circuit. Even in this case, the same effect as in the present embodiment can be obtained.

Further, in the pre-distortion distortion compensating circuit (see FIGS. 7 and 8) of the present embodiment, the distribution ratio of variable power distributor 105 is controlled using the output signal from detector 116. However, the variable attenuators 108 and 111, the variable phase shifters 109 and 112, and the delay circuit 104 can be controlled using the output signal from the detector 116.

The power distributor 103 according to the present embodiment
Corresponds to the signal distribution means of the present invention (third present invention). The means including the distortion generating circuit 107 of the present embodiment corresponds to the distortion signal generating means of the present invention (third invention). The means including the detector 116 of the present embodiment corresponds to the bias voltage control means of the present invention (third invention). Further, power combiner 113 of the present embodiment
This corresponds to the signal synthesizing means of the present invention (third present invention). Further, the power amplifier 114 of the present embodiment corresponds to the signal amplifying means of the present invention (third present invention).

The operation of power distributor 103 of the present embodiment corresponds to the signal distribution step of the present invention. Also,
The operation of the means including the distortion generation circuit 107 of the present embodiment corresponds to the distortion signal generation step of the present invention. Also,
The operation of the power combiner 113 of the present embodiment corresponds to the signal combining step of the present invention. The operation of the power amplifier 114 according to the present embodiment corresponds to a signal amplification step according to the present invention. The operation of the means including the detector 116 of the present embodiment corresponds to the control step of the present invention.

(Embodiment 5) Next, Embodiment 5
The configuration and operation of the pre-distortion distortion compensating circuit will be described with reference to FIG. In addition,
FIG. 9 is a block diagram of the pre-distortion distortion compensating circuit of the present embodiment. The pre-distortion distortion compensating circuit of the present embodiment has a configuration similar to that of the above-described pre-distortion distortion compensating circuit of the first embodiment, and the same reference numerals are given to the same means in both drawings. .

However, in the above-described first embodiment, a part of the output power of the power amplifier is taken out by the directional coupler 115 and used to detect the power level. A part of the signal input from the input terminal 101 is extracted by the directional coupler 132, and the power level is detected by the detector 116 using the extracted signal. According to the present embodiment, the power loss due to the directional coupler 115, which occurs in the case of the first embodiment, can be eliminated, so that the overall power efficiency is improved.

Therefore, similar to the first embodiment,
The distribution ratio of the variable power distributor 105 can be changed according to the operation level.

In this embodiment, the operation level is detected using the input power without using the output power. However, in the first to fourth embodiments, the input power is used without using the output power. May detect the operation level.

Also, in the present embodiment, the distribution ratio of variable power divider 105 is changed using the output signal from detector 116, but instead, the ratio between detector 116 and variable power distributor 105 is changed. A storage device is interposed between the variable power divider and a setting for inputting a control signal corresponding to the output power level to the variable power divider is stored in the storage device, and the control signal corresponding to the output power level is stored in the variable power divider. Can also be entered. Even in this case, the same effect as in the present embodiment can be obtained.

Further, in the present embodiment, the distribution ratio of variable power distributor 105 is controlled using the output signal from detector 116. However, the present invention is not limited to this, and the output signal from detector 116 is used. Thus, the variable attenuators 108 and 111, the variable phase shifters 109 and 112, and the delay circuit 104 can be controlled.

The power distributor 103 according to the present embodiment
Corresponds to the signal distribution means of the present invention (first present invention). The means including the variable power distributor 105 and the detector 116 of the present embodiment corresponds to the signal adjusting means of the present invention (first present invention). The means including the distortion generating circuit 107 of the present embodiment corresponds to the distortion signal generating means of the present invention (first present invention). Further, power combiner 113 of the present embodiment corresponds to the signal combining means of the present invention (first present invention). Further, the power amplifier 114 of the present embodiment
Corresponds to the signal amplification means of the present invention (first present invention).

The operation of power distributor 103 of the present embodiment corresponds to the signal distribution step of the present invention. Also,
The operation of the means including the distortion generation circuit 107 of the present embodiment corresponds to the distortion signal generation step of the present invention. Also,
The operation of the power combiner 113 of the present embodiment corresponds to the signal combining step of the present invention. The operation of the power amplifier 114 according to the present embodiment corresponds to a signal amplification step according to the present invention. Also, the variable power distributor 105 of the present embodiment,
The operation of the means including the detector 116 corresponds to the control step of the present invention.

The signal input from the directional coupler 132 to the power divider 103 corresponds to the input signal of the present invention.

In the above, Embodiments 1 to 5 have been described in detail.

The degree of the difference between the signal amplitude of the predetermined frequency component included in the distortion signal generated by the distortion signal generating means of the present invention and the predetermined frequency component included in the distortion signal generated by the signal amplifying means. That the degree of the difference between the signal amplitudes has a predetermined relationship means that in the above-described embodiment, the frequency component f3 included in the distortion signal generated in the distortion signal generation circuit 107,
The difference between the dBc value of the signal amplitude of f4 and the frequency component f included in the distortion signal generated in the power amplifier 114
The difference between the dBc values of the signal amplitudes of f3 and f4 is substantially the same, but is not limited thereto. For example, the signals of the frequency components f3 and f4 included in the distortion signal generated in the distortion signal generation circuit 107 Even if the ratio of the (absolute) level of the amplitude and the ratio of the (absolute) level of the signal amplitude of the frequency components f3 and f4 included in the distortion signal generated in the power amplifier 114 are substantially equal. Good (that is, it is sufficient that the intermodulation distortion component generated by the signal amplifying means of the present invention can be effectively suppressed at an arbitrary power level).

Further, signal distribution means for distributing a signal based on an external input signal, distortion signal generation means for generating a distortion signal using one of the distributed signals, and Signal combining means for combining the other of the distributed signals and the generated distortion signal, and signal amplifying means for amplifying the combined signal and outputting an output signal to the outside The input power and / or bias voltage supplied to the distortion signal generating means
(1) The difference between the signal amplitude of the predetermined frequency component included in the distortion signal generated by the distortion signal generating means and the signal amplitude of the predetermined frequency component included in the distortion signal generated by the signal amplifying means. The degree has a predetermined relationship, and / or (2) a phase difference of a predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and a predetermined difference included in the distortion signal generated by the signal amplification unit. The pre-distortion distortion compensating circuit controlled so that the phase difference between the frequency components has a predetermined relationship is included in the present invention.

The present invention is a program for causing a computer to execute the functions of all or a part of the above-described pre-distortion distortion compensating circuit of the present invention (or an apparatus, an element, a circuit, a unit, or the like). And a program that operates in cooperation with a computer.
Of course, the computer is not limited to pure hardware such as a CPU, but may include firmware, an OS, and peripheral devices.

The present invention also provides a program for causing a computer to execute all or some of the steps (or steps, operations, actions, etc.) of the above-described predistortion distortion compensation method of the present invention. And a program that operates in cooperation with a computer.

Note that some means (or an apparatus,
An element, a circuit, a part, or the like), some steps (or steps, operations, operations, and the like) of the present invention mean several means or steps of the plural means or steps, or It means some functions or some operations of means or steps.

Further, some devices (or elements,
Circuit, part, etc.) means some of the plurality of devices, or some means (or element, circuit, part, etc.) within one device, or one It means some of the functions of the means.

The present invention also includes a computer-readable recording medium on which the program of the present invention is recorded. Further, one usage form of the program of the present invention may be a form in which the program is recorded on a computer-readable recording medium and operates in cooperation with the computer. One usage of the program of the present invention may be a mode in which the program is transmitted through a transmission medium, read by a computer, and operates in cooperation with the computer. The recording medium includes a ROM and the like, and the transmission medium includes a transmission medium such as the Internet, light, radio waves, and sound waves.

The configuration of the present invention may be realized by software or hardware.

The present invention also provides a medium having a program for causing a computer to execute all or a part of the functions of all or part of the predistortion distortion compensating circuit of the present invention. The program includes a medium that is readable and has the read program execute the function in cooperation with the computer.

The present invention also relates to a medium carrying a program for causing a computer to execute all or a part of the operations of all or a part of the pre-distortion distortion compensating method of the present invention. And a medium in which the program readable by the computer executes the operation in cooperation with the computer.

Thus, a distortion compensation circuit having a wide dynamic range can be realized.

[0130]

As apparent from the above description, the present invention has an advantage that the distortion compensation circuit can obtain the distortion compensation effect over a wide output level.

[Brief description of the drawings]

FIG. 1 is a block diagram of a pre-distortion distortion compensating circuit according to a first embodiment of the present invention.

FIG. 2A shows a terminal a according to the first embodiment of the present invention;
(B) An explanatory diagram of the frequency spectrum of the signal at the terminal b in the first embodiment of the present invention. (C) An explanatory diagram of the frequency spectrum of the signal at the terminal c in the first embodiment of the present invention. (D) An explanatory diagram of a frequency spectrum of a signal at a terminal d according to the first embodiment of the present invention. (E) An explanatory diagram of a frequency spectrum of a signal at a terminal e according to the first embodiment of the present invention. (G) An explanatory diagram of a frequency spectrum of a signal at a terminal f in the first embodiment of the present invention (g) An explanatory diagram of a frequency spectrum of a signal at a terminal g in the first embodiment of the present invention (h) The first embodiment of the present invention Explanatory drawing of the frequency spectrum of the signal at terminal h in FIG.

FIG. 3 is a power amplifier 11 according to the first embodiment of the present invention.
Explanatory drawing of the amplification characteristic of No. 4

FIG. 4 is a block diagram of a pre-distortion distortion compensating circuit according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a pre-distortion distortion compensating circuit according to a third embodiment of the present invention.

FIG. 6 is a block diagram of a pre-distortion distortion compensating circuit according to a fourth embodiment of the present invention.

FIG. 7 is a block diagram of a modification of the fourth embodiment in which the variable power distributor 105 is used as the power distributor 121 according to the present invention.

FIG. 8 is a block diagram of a modification of the fourth embodiment in which a variable power distributor 105 is used as the power distributor 103 according to the present invention.

FIG. 9 is a block diagram of a pre-distortion distortion compensating circuit according to a fifth embodiment of the present invention.

FIG. 10 is a block diagram of a conventional pre-distortion distortion compensation circuit.

11A is an explanatory diagram of a distortion amplitude characteristic of the distortion generating circuit 605. FIG. 11B is an explanatory diagram of a distortion phase characteristic of the distortion generating circuit 605. FIG. 11C is an explanatory diagram of a distortion amplitude characteristic of the power amplifier 609. FIG. 609 is an explanatory diagram of the distortion phase characteristic

FIG. 12 shows a control circuit 11 according to the embodiment of the present invention.
Block diagram of pre-distortion distortion compensating circuit provided with 6 '

[Explanation of symbols]

 Reference Signs List 101 input terminal 102 output terminal 103, 121 power divider 104, 106 delay circuit 105 variable power divider 107 distortion generating circuit 108, 111 variable attenuator 109, 112 variable phase shifter 110, 113 power combiner 114 power amplifier 115, 132 Directional coupler 116 Detector 131 Variable gain amplifier

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Seiji Fujiwara F-term in Matsushita Communication Industrial Co., Ltd. 3-1, Tsunashimahigashi 4-chome, Kohoku-ku, Yokohama, Kanagawa 5J090 AA01 AA41 CA22 CA26 FA08 FA17 GN03 GN06 HA26 HN08 KA15 KA16 KA23 KA55 MA11 SA13 TA01 TA02

Claims (25)

[Claims] 1. A signal distribution unit that distributes an input signal that is input, and performs a predetermined adjustment using one of the distributed signals, and outputs a signal based on the result of the adjustment. A signal adjustment unit, a distortion signal generation unit that generates a distortion signal using a signal output from the signal adjustment unit, and the other of the divided signals and the generated distortion signal. A signal amplifying unit that amplifies the combined signal and outputs an output signal, wherein the signal adjustment unit causes the predetermined adjustment to be generated in (1) the distortion signal generation unit The degree of the difference between the signal amplitudes of the predetermined frequency components included in the distortion signal obtained and the degree of the difference in the signal amplitude of the predetermined frequency components included in the distortion signal generated by the signal amplifying means are different. And / or (2) the phase difference of the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the predetermined difference included in the distortion signal generated by the signal amplification unit A pre-distortion distortion compensating circuit that performs a predetermined relationship with the phase difference between the frequency components. 2. A variable signal distribution means for distributing an input signal at a variable distribution ratio, and a distortion signal generation means for generating a distortion signal by using one of the distributed signals. A signal combining unit that combines the other of the distributed signals and the generated distortion signal; and a signal amplifying unit that amplifies the combined signal and outputs an output signal. The signal variable distribution means determines the change in the distribution ratio as (1)
The difference between the signal amplitude of the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the signal amplitude of the predetermined frequency component included in the distortion signal generated by the signal amplification unit is different. The degree has a predetermined relationship, and / or (2) a difference between the phase difference of the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the distortion signal generated by the signal amplification unit. A predistortion distortion compensating circuit for performing a predetermined relationship between a phase difference of the predetermined frequency component and a phase difference of the predetermined frequency component. 3. A signal distributing means for distributing an input signal to be inputted, and a distortion signal generating means for generating a distortion signal using one of the distributed signals and a predetermined bias voltage. Bias voltage control means for controlling the bias voltage; signal synthesizing means for synthesizing the other of the divided signals and the generated distortion signal; and amplifying the synthesized signal. A signal amplifying unit for outputting an output signal, wherein the bias voltage control unit controls the bias voltage by: (1) a signal amplitude of a predetermined frequency component included in the distortion signal generated by the distortion signal generation unit Has a predetermined relationship between the degree of difference and the degree of difference in signal amplitude of the predetermined frequency component included in the distortion signal generated in the signal amplification unit, and Or (2) a phase difference between the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and a phase difference between the predetermined frequency component included in the distortion signal generated by the signal amplification unit. And a pre-distortion distortion compensating circuit for performing a predetermined relationship. 4. A degree of a difference between signal amplitudes of predetermined frequency components included in a distortion signal generated by the distortion signal generating unit and a degree of difference between the predetermined frequency components included in the distortion signal generated by the signal amplifying unit. The fact that the degree of the difference between the signal amplitudes has a predetermined relationship means that the difference between the dBc value of the signal amplitude of the predetermined frequency component included in the distortion signal generated by the distortion signal generation means and the signal amplitude generated by the signal amplification means. 4. The pre-distortion distortion compensating circuit according to claim 1, wherein a difference between a signal amplitude of the predetermined frequency component and a dBc value included in the distortion signal to be applied is substantially equal. 5. The phase difference between the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the phase of the predetermined frequency component included in the distortion signal generated by the signal amplification unit. The difference has a predetermined relationship that the difference between the deg value of the phase of the predetermined frequency component included in the distortion signal generated by the distortion signal generation unit and the distortion signal generated by the signal amplification unit is included. 4. The pre-distortion distortion compensating circuit according to claim 1, wherein the difference between the deg values of the phases of the predetermined frequency components is substantially equal. 6. A first delay circuit for adjusting a propagation delay time of the other signal distributed by the signal distribution means, and converting the signal amplified by the signal amplification means into a detection signal and an external signal. A signal detector for detecting the level of the signal for detection and outputting the control signal as a control signal; and a variable distributor for distributing one of the signals distributed by the signal distributor. A variable power divider that distributes by a ratio; wherein the distortion signal generating means adjusts a propagation delay time of one of the signals distributed by the variable power divider; and the variable power divider. Generating circuit for generating the distortion signal by inputting the other signal distributed by the first and second signals, and a first vector adjusting means for adjusting the amplitude and phase of the output signal from the distortion generating circuit A stage, a power combiner for combining an output signal from the second delay circuit and an output signal from the first vector adjusting means, and adjusting an amplitude and a phase of the output signal from the power combiner to adjust the amplitude and the phase. The predistortion distortion compensating circuit according to claim 1, further comprising a second vector adjusting unit that outputs the distortion signal as a distortion signal, wherein the change of the distribution ratio by the variable power divider is performed using the control signal. 7. A first delay circuit for adjusting a propagation delay time of the other signal distributed by the signal distribution means, and converting the signal amplified by the signal amplification means into a detection signal and an external signal. And a power divider for distributing one of the signals distributed by the signal distributing unit, wherein the signal adjusting unit detects the level of the detection signal and outputs the detected signal as a control signal. A detector, and power level adjusting means for adjusting the power level of one of the signals distributed by the power divider; wherein the distortion signal generating means has a propagation delay of the other signal distributed by the power divider. A second delay circuit for adjusting time, a distortion generating circuit for generating the distortion signal by inputting a signal adjusted by the power level adjusting means, First vector adjusting means for adjusting the amplitude and phase of the output signal from the path, and a power combiner for synthesizing the output signal from the second delay circuit and the output signal from the first vector adjusting means. A second vector adjustment unit that adjusts the amplitude and phase of the output signal from the power combiner and outputs the resultant signal as the distortion signal. The change in the gain of the power level adjustment unit uses the control signal. 2. The predistortion distortion compensating circuit according to claim 1, wherein the predistortion distortion compensating circuit is performed. 8. A first delay circuit for adjusting a propagation delay time of another signal distributed by the signal distribution unit, and a power level adjustment unit for adjusting a power level of an output signal from the first delay circuit. And a detection signal distribution unit that distributes the signal amplified by the signal amplification unit to a detection signal and an external signal. The signal variable distribution unit detects and controls the level of the detection signal. A detector that outputs the input signal as a signal; a variable power divider that variably distributes the input signal; and a power divider that distributes one of the signals distributed by the variable power distributor. The means includes a second delay circuit for adjusting a propagation delay time of one signal distributed by the power distributor, and the distortion by inputting the other signal distributed by the power distributor. Signal generating circuit, first vector adjusting means for adjusting the amplitude and phase of the output signal from the distortion generating circuit, output signal from the second delay circuit, and the first vector adjusting means A power combiner for combining the output signal from the power combiner, and a second vector adjuster for adjusting the amplitude and phase of the output signal from the power combiner and outputting the resultant signal as the distortion signal. 3. The pre-distortion distortion compensating circuit according to claim 2, wherein the change in the distribution ratio and the change in the gain of the power level adjusting means are performed using the control signal. 9. A first delay circuit for adjusting a propagation delay time of the other signal distributed by the signal distribution means, and converting the signal amplified by the signal amplification means into a detection signal and an external signal. The bias voltage control means has a detector for detecting the level of the detection signal and outputting it as a control signal, and the distortion signal generation means is provided by the signal distribution means. A power divider that distributes one of the divided signals, a second delay circuit that adjusts a propagation delay time of the one signal divided by the power divider, and the other signal that is distributed by the power divider , A distortion generating circuit that generates the distortion signal by inputting the input signal, a first vector adjustment unit that adjusts an amplitude and a phase of an output signal from the distortion generation circuit, and the second delay unit. A power combiner that combines an output signal from the extension circuit and an output signal from the first vector adjustment unit, and a second that adjusts the amplitude and phase of the output signal from the power combiner and outputs the resultant as the distortion signal. 4. The pre-distortion distortion compensating circuit according to claim 3, further comprising: a vector adjusting unit configured to control the bias voltage by using the control signal. 10. A detection signal distribution means for distributing an external signal to the input signal and the detection signal, and a first delay for adjusting a propagation delay time of the other signal distributed by the signal distribution means. A circuit for detecting the level of the signal for detection and outputting it as a control signal, and a variable power distributor for distributing one of the signals distributed by the signal distributor. Wherein the distortion signal generating means inputs a second delay circuit for adjusting a propagation delay time of one signal distributed by the variable power distributor, and the other signal distributed by the variable power distributor. , A distortion generating circuit for generating the distortion signal, first vector adjusting means for adjusting the amplitude and phase of an output signal from the distortion generating circuit, and an output signal from the second delay circuit. A power combiner that combines the signal and the output signal from the first vector adjuster; and a second vector adjuster that adjusts the amplitude and phase of the output signal from the power combiner and outputs the resultant as the distortion signal. The pre-distortion distortion compensation circuit according to claim 1, further comprising: changing the distribution ratio by the variable power divider using the control signal. 11. The pre-distortion distortion compensating circuit according to claim 6, further comprising a storage device for storing data used for generating the control signal. 12. The pre-distortion distortion compensating circuit according to claim 7, wherein said power level adjusting means is configured using a variable gain amplifier or a variable attenuator. 13. The variable power splitter according to claim 6, wherein the variable power splitter is configured using a variable coupling degree directional coupler.
The pre-distortion distortion compensation circuit according to any one of the above. 14. The pre-distortion distortion compensating circuit according to claim 6, wherein said delay circuit is configured using a filter. 15. A first power distribution means for distributing an input signal; a first propagation time delay means for adjusting a propagation delay time of a signal distributed by the first power distribution means; A second power distribution unit that distributes the signal distributed by the power distribution unit; a second propagation time delay unit that adjusts a propagation delay time of the signal distributed by the second power distribution unit; A distortion generating means for generating a distortion signal by inputting a signal distributed by the power distribution means, a first vector adjusting means for adjusting an amplitude and a phase of an output signal from the distortion generating means, and the second A first power combining unit that combines the output signal from the propagation time delay unit with the output signal from the first vector adjusting unit; and the amplitude and the amplitude of the output signal from the first power combining unit. A second vector adjusting unit for adjusting a phase; a second power synthesizing unit for synthesizing an output signal from the first propagation time delay unit and an output signal from the second vector adjusting unit; A power amplifying means for amplifying an output signal from the power combining means, a third power distributing means for distributing an output signal from the power amplifying means, and a level of a signal distributed by the third power distributing means. Detecting means for detecting, wherein the second power distribution means can change a power distribution ratio by a control signal; and at least one of the second power distribution means and the distortion generating circuit A pre-distortion distortion compensating circuit, which supplies a control signal to the output from the detection means. 16. A first power distribution means for distributing an input signal; a first propagation time delay means for adjusting a propagation delay time of a signal distributed by the first power distribution means; Power level adjustment means for adjusting the power level of the output signal from the propagation time delay means; second power distribution means for distributing the signal distributed by the first power distribution means; and second power distribution means A second propagation time delay unit for adjusting a propagation delay time of a signal distributed by the second power distribution unit; a distortion generation unit for generating a distortion signal by inputting a signal distributed by the second power distribution unit; First vector adjusting means for adjusting the amplitude and phase of the output signal from the generating means; output signal from the second propagation time delay means; and output from the first vector adjusting means. A first power combining means for combining signals, a second vector adjusting means for adjusting an amplitude and a phase of an output signal from the first power combining means, an output signal from the power level adjusting means, A second power combining unit that combines output signals from the second vector adjusting unit; a power amplifying unit that amplifies an output signal from the second power combining unit; and an output signal from the power amplifying unit. A third power distribution unit; a detection unit for detecting a level of a signal distributed by the third power distribution unit; a power distribution ratio of the first power distribution unit; and a gain of the power level adjustment unit. Can be changed by a control signal. A control signal is supplied to at least one of the first power distribution unit, the power level adjustment unit, and the distortion generation circuit, Predistortion distortion compensation circuit and supplying a signal from the output of said detecting means. 17. A first power distribution means for distributing an input signal; a first propagation time delay means for adjusting a propagation delay time of a signal distributed by the first power distribution means; A second power distribution unit that distributes the signal distributed by the power distribution unit; a second propagation time delay unit that adjusts a propagation delay time of the signal distributed by the second power distribution unit; Power level adjusting means for adjusting a power level of a signal distributed by the power distributing means, a distortion generating means for generating a distortion signal by inputting the signal distributed by the power level adjusting means, and the distortion generating means A first vector adjusting means for adjusting the amplitude and phase of the output signal from the second signal; an output signal from the second propagation time delaying means; First power combining means for combining force signals; second vector adjusting means for adjusting the amplitude and phase of an output signal from the first power combining means; and output from the first propagation time delay means. A second power combining unit that combines the signal and the output signal from the second vector adjusting unit; a power amplifying unit that amplifies the output signal from the second power combining unit; and an output from the power amplifying unit. A third power distribution unit that distributes a signal; and a detection unit that detects a level of the signal distributed by the third power distribution unit, wherein a gain of the power level adjustment unit is changed by a control signal. A pre-distortion distortion compensating circuit, wherein the control signal is supplied from an output of the detection means. 18. A first power distribution means for distributing an input signal; a first propagation time delay means for adjusting a propagation delay time of a signal distributed by the first power distribution means; A second power distribution unit that distributes the signal distributed by the power distribution unit; a second propagation time delay unit that adjusts a propagation delay time of the signal distributed by the second power distribution unit; A distortion generating means for generating a distortion signal by inputting a signal distributed by the power distribution means, a first vector adjusting means for adjusting an amplitude and a phase of an output signal from the distortion generating means, and the second A first power combining unit that combines the output signal from the propagation time delay unit with the output signal from the first vector adjusting unit; and the amplitude and the amplitude of the output signal from the first power combining unit. A second vector adjusting unit for adjusting a phase; a second power synthesizing unit for synthesizing an output signal from the first propagation time delay unit and an output signal from the second vector adjusting unit; A power amplifying means for amplifying an output signal from the power combining means, a third power distributing means for distributing an output signal from the power amplifying means, and a level of a signal distributed by the third power distributing means. A pre-distortion distortion compensating circuit, comprising: detecting means for detecting, wherein a bias voltage of the distortion generating means can be changed by a control signal, and the control signal is supplied from an output of the detecting means. 19. A first power distribution unit for distributing an input signal, a second power distribution unit for distributing a signal distributed by the first power distribution unit, and a distribution by the second power distribution unit. A first propagation time delay unit that adjusts a propagation delay time of the divided signal; a third power distribution unit that distributes a signal distributed by the second power distribution unit; and a third power distribution unit. A second propagation time delay unit that adjusts a propagation delay time of the distributed signal; a distortion generation unit that generates a distortion signal by inputting the signal distributed by the third power distribution unit; A first vector adjusting means for adjusting the amplitude and phase of an output signal from the means; an output signal from the second propagation time delaying means; and an output signal from the first vector adjusting means. A first power synthesizing means, a second vector adjusting means for adjusting an amplitude and a phase of an output signal from the first power synthesizing means, an output signal from the first propagation time delaying means, A second power synthesizing unit that synthesizes an output signal from the second vector adjusting unit; a power amplifying unit that amplifies an output signal from the second power synthesizing unit; A detection unit for detecting a signal level, wherein the third power distribution unit can change a power distribution ratio according to a control signal; and the third power distribution unit and the distortion generation circuit A predistortion distortion compensating circuit, wherein a control signal is supplied to at least one of the above, and the control signal is supplied from an output of the detection means. 20. Based on a result of the predetermined adjustment,
(1) control for adjusting the amplitude and phase of the output signal from the distortion generation circuit with respect to the first vector adjustment means; and (2) control from the power combiner with respect to the second vector adjustment means. 11. The pre-distortion distortion compensating circuit according to claim 6, further comprising a control circuit for performing control for adjusting the amplitude and phase of the output signal. 21. Based on the result of the change of the distribution ratio,
(1) control for adjusting the amplitude and phase of the output signal from the distortion generation circuit with respect to the first vector adjustment means; and (2) control from the power combiner with respect to the second vector adjustment means. 9. The pre-distortion distortion compensating circuit according to claim 8, further comprising a control circuit for performing control for adjusting the amplitude and phase of the output signal. 22. A control for adjusting an amplitude and a phase of an output signal from the distortion generating circuit with respect to the first vector adjusting means, based on a result of the control of the bias voltage, and (2) 10. The pre-distortion distortion compensating circuit according to claim 9, further comprising a control circuit for controlling the second vector adjusting means to adjust the amplitude and phase of the output signal from the power combiner. 23. A signal distributing step of distributing an input signal that is input, a distortion signal generating step of generating a distortion signal using one of the distributed signals, and the distributed signal. A signal synthesizing step of synthesizing the other of the signals and the generated distortion signal; a signal amplifying step of amplifying the synthesized signal to output an output signal; and a distortion signal generating step. The input power and / or the bias voltage are included in (1) the degree of the difference in signal amplitude of a predetermined frequency component included in the distortion signal generated in the distortion signal generation step and the distortion signal generated in the signal amplification step. And a degree of difference in signal amplitude of the predetermined frequency component has a predetermined relationship, and / or (2) generating the distortion signal. The phase difference of the predetermined frequency component included in the distortion signal generated in the step and the phase difference of the predetermined frequency component included in the distortion signal generated in the signal amplification step have a predetermined relationship. A pre-distortion distortion compensating method comprising: 24. The method of claim 23, further comprising the steps of: distributing an input signal; and generating a distortion signal by using one of the divided signals. Generating a distorted signal, synthesizing the other of the divided signals and the generated distorted signal, and amplifying the synthesized signal to output an output signal. And input power and / or bias voltage used in the distortion signal generating step.
(1) The degree of the difference in the signal amplitude of the predetermined frequency component included in the distortion signal generated in the distortion signal generation step and the signal amplitude of the predetermined frequency component included in the distortion signal generated in the signal amplification step And / or (2) a phase difference between the predetermined frequency component included in the distortion signal generated in the distortion signal generation step and the signal amplification step. A program for causing a computer to execute all or a part of a control step of controlling the phase difference of the predetermined frequency component included in the distortion signal to have a predetermined relationship. 25. A medium carrying the program according to claim 24, wherein the medium can be processed by a computer.