CN105391456B - Multiband Doherty power amplification systems - Google Patents
Multiband Doherty power amplification systems Download PDFInfo
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- CN105391456B CN105391456B CN201510676353.8A CN201510676353A CN105391456B CN 105391456 B CN105391456 B CN 105391456B CN 201510676353 A CN201510676353 A CN 201510676353A CN 105391456 B CN105391456 B CN 105391456B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
- H04B1/0075—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands using different intermediate frequencied for the different bands
- H04B1/0078—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands using different intermediate frequencied for the different bands with a common intermediate frequency amplifier for the different intermediate frequencies, e.g. when using switched intermediate frequency filters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0288—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0096—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges where a full band is frequency converted into another full band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
- H04L25/03853—Shaping by digital methods other than look up tables or up/down converters
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Abstract
The present invention relates to a kind of multiband Doherty power amplification systems, including：Forward power distributor, forward direction down-converted module, digital signal processing module, forward direction upconversion process module, broadband combiner, Doherty power amplifier, wide-band coupler, current detection module, microcontroller, feedback power distributor, feedback down-conversion processing module；Above-mentioned multiband Doherty power amplification systems, the feedback radiofrequency signal of the corresponding frequency band inputted using microprocessor control digital signal processing module according to the operating current and feedback down-conversion processing module of Doherty power amplification systems carries out Digital Signal Processing to N roads radiofrequency signal respectively, and is transmitted the operating current of the Doherty power amplification systems detected to digital signal processing module by microcontroller by current detection module；Microprocessor control digital signal processing module carries out aforesaid operations, is effectively improved the performance of the multiband Doherty power amplification systems of the present invention.
Description
Technical field
The present invention relates to technical field of electric power communication, more particularly to a kind of multiband Doherty power amplification systems.
Background technology
With continuing to develop for the communication technology, from the point of view of current base station demand and the trend of development, multiband can be met, many
The ultra wide band of operator, multiband, low-power consumption base station are inexorable trends, and on the one hand this base station can improve resource utilization, many
Individual operator is used in conjunction with, it is to avoid repetition is built a station, and reduces O＆M cost；On the other hand, base station power consumption can be reduced, accomplishes real
Environmental protection.
Want to realize that above-mentioned ultra wide band, multiband, the key of low-power consumption base station are ultra wide band, multiband high efficiency power amplifier
Realize, but design such power amplifier and there is many technical barriers, for example, using Doherty frameworks, the efficient reality of ultra wide band
It is existing, the realization of ultrawide band high performance power splitter, the realization of ultra-wide bringing onto load modulation, particularly it is difficult to ensure that the main power amplifier of multiband and
The synthesis of auxiliary power amplifier phase and power, so as to have a strong impact on the overall performance of multi-band power amplifier, such as, and indivedual frequency range efficiency or
Power is too low and does not reach requirement.
Due to multiband Doherty frequency-distributed, existing Doherty power amplification systems are difficult simultaneously in numerous frequency ranges
It is optimal efficiency and power, causes the poor-performing of existing Doherty power amplification systems.
The content of the invention
Based on this, it is necessary to which for the technical problems of existing multiband Doherty power amplification system poor-performings, there is provided one
Plant multiband Doherty power amplification systems.
A kind of multiband Doherty power amplification systems, including：Forward power distributor, forward direction down-converted module, numeral
Signal processing module, forward direction upconversion process module, broadband combiner, Doherty power amplifier, wide-band coupler, electric current
Detection module, microcontroller, feedback power distributor, feedback down-conversion processing module；
The forward power distributor, forward direction down-converted module, digital signal processing module, forward direction upconversion process
Module, broadband combiner, Doherty power amplifier and wide-band coupler are sequentially connected；The current detection module connection
Doherty power amplifier, and digital signal processing module is connected by microcontroller；The wide-band coupler connection
The signal output part of Doherty power amplifier, and pass sequentially through feedback power distributor, the connection of feedback down-conversion processing module
Digital signal processing module；
Frequency range dividing mode of the forward power distributor by the downlink radio-frequency signal of input according to setting is divided under N roads
Row radiofrequency signal, and transmit to forward direction down-converted module；
The forward direction down-converted module carries out down-converted respectively to N roads downlink radio-frequency signal, obtains N roads
Digital medium-frequency signal, and transmit to digital signal processing module；
The digital signal processing module is by microcontroller according to the operating current information of Doherty power amplification systems and anti-
The feedback digital intermediate-freuqncy signal power information of corresponding frequency band of down-converted module output is presented respectively to N railway digital intermediate-freuqncy signals
Digital Signal Processing is carried out, two groups of N roadbed band signals are obtained, and transmit to forward direction upconversion process module；
The forward direction upconversion process module carries out upconversion process respectively to two groups of N roadbeds band signals, obtains two groups of N roads
Radiofrequency signal is exported, and is transmitted to broadband combiner；
Two groups of N roads are exported radiofrequency signals and are combined into two-way radiofrequency signal respectively by the broadband combiner, and transmit to
Doherty power amplifier is exported after being amplified；
The operating current of the current detection module detection Doherty power amplifier is believed as microprocessor control numeral
The parameter information of number processing module；
The radiofrequency signal of the signal output part of the wide-band coupler collection Doherty power amplifier is exported to feedback work(
Rate distributor；
The feedback radiofrequency signal is divided into N roads feedback according to the frequency range dividing mode and penetrated by the feedback power distributor
Frequency signal is simultaneously exported to feedback down-conversion processing module.
Above-mentioned multiband Doherty power amplification systems, utilize operating current of the microcontroller according to Doherty power amplifier
The feedback digital intermediate-freuqncy signal power information of information and the corresponding frequency band of feedback down-conversion processing module output is respectively to N railway digitals
Intermediate-freuqncy signal carries out Digital Signal Processing；The operating current information of Doherty power amplifier is detected using current detection module
Pass through microprocessor control digital signal processing module；Further, Doherty power amplifier is gathered by wide-band coupler
The radiofrequency signal of signal output part is to feedback power distributor；Microcontroller is above-mentioned by controlling digital signal processing module to carry out
Operation, is effectively improved the performance of the multiband Doherty power amplification systems of the present invention.
Brief description of the drawings
Fig. 1 is the structural representation of the multiband Doherty power amplification systems of one embodiment of the present of invention；
Fig. 2 is the forward direction down-converted module of the multiband Doherty power amplification systems of an alternative embodiment of the invention
Structural representation；
Fig. 3 is the forward direction upconversion process module of the multiband Doherty power amplification systems of one embodiment of the present of invention
Structural representation；
Fig. 4 is the feedback down-conversion processing module of the multiband Doherty power amplification systems of an alternative embodiment of the invention
Structural representation；
Fig. 5 is the multiband Doherty power amplification systems adjustment radiofrequency signal phase using one embodiment of the present of invention
Method flow diagram；
Fig. 6 is the multiband Doherty power amplification systems adjustment radio frequency signal amplitude using one embodiment of the present of invention
Method flow diagram；
Fig. 7 is that two-band radiofrequency signal is entered using the multiband Doherty power amplification systems of one embodiment of the present of invention
The method flow diagram of row control.
Embodiment
In order to further illustrate the effect of the technological means of the invention taken and acquirement, below in conjunction with the accompanying drawings and preferably
Embodiment, to technical scheme, carries out clear and complete description.
As shown in figure 1, structural representations of the Fig. 1 for the multiband Doherty power amplification systems of one embodiment of the present of invention.
A kind of multiband Doherty power amplification systems, including：Forward power distributor 1001, forward direction down-converted module
1002nd, digital signal processing module 1003, forward direction upconversion process module 1004, broadband combiner 1005, Doherty power are put
Big device 1006, wide-band coupler 1007, current detection module 1008, microcontroller 1009, feedback power distributor 1010, feedback
Down-converted module 1011；
It is the forward power distributor 1001, forward direction down-converted module 1002, digital signal processing module 1003, preceding
Upconvert processing module 1004, broadband combiner 1005, Doherty power amplifier 1006 and wide-band coupler 1007 successively
Connection；The current detection module 1008 connects Doherty power amplifier, 1006 and connects numeral by microcontroller 1009
Signal processing module 1003；The signal output part of the connection of wide-band coupler 1007 Doherty power amplifier 1006, and according to
It is secondary that digital signal processing module 1003 is connected by feedback power distributor 1010, feedback down-conversion processing module 1011；
Frequency range dividing mode of the forward power distributor 1001 by the downlink radio-frequency signal of input according to setting is divided into N
Road downlink radio-frequency signal, and transmit to forward direction down-converted module 1002；
The forward direction down-converted carries out down-converted respectively to N roads downlink radio-frequency signal, obtains N railway digitals
Intermediate-freuqncy signal, and transmit to digital signal processing module 1003；
The digital signal processing module 1003 passes through work of the microcontroller 1009 according to Doherty power amplifier 1006
Make the feedback digital intermediate-freuqncy signal power information point for the corresponding frequency band that current information and feedback down-conversion processing module 1011 are exported
It is other that Digital Signal Processing is carried out to N railway digitals intermediate-freuqncy signal, obtain two groups of N roadbed band signals, and transmit to preceding upconverting place
Manage module 1004；
Described 1004 pairs of two groups of N roadbeds band signals of forward direction upconversion process module carry out upconversion process respectively, obtain two
Group N roads output radiofrequency signal, and transmit to broadband combiner 1005；
First group of N roads radiofrequency signal is synthesized first via radiofrequency signal by the broadband combiner 1005, by second group of N road
Radiofrequency signal synthesizes the second tunnel radiofrequency signal, and transmit to Doherty power amplifier 1006 be amplified after export；
The operating current of the detection of current detection module 1008 Doherty power amplifier 1006 is used as microcontroller
The parameter information of 1009 control digital signal processing modules 1003；
The radiofrequency signal output of the signal output part of the collection of wide-band coupler 1007 Doherty power amplifier 1006
To feedback power distributor 1010；
It is anti-that the feedback radiofrequency signal is divided into N roads by the feedback power distributor 1010 according to the frequency range dividing mode
Present radiofrequency signal and export to feedback down-conversion processing module 1011.
Above-mentioned multiband Doherty power amplification systems, using microcontroller 1009 according to Doherty power amplifier 1006
The feedback digital intermediate-freuqncy signal power information for the corresponding frequency band that operating current information and feedback down-conversion processing module 1011 are exported
Digital Signal Processing is carried out to N railway digitals intermediate-freuqncy signal respectively；Doherty power amplifications are detected using current detection module 1008
The operating current of device 1006 controls digital signal processing module 1003 by microcontroller 1009；Further, broadband couple device is passed through
The radiofrequency signal of the signal output part of the collection Doherty power amplifier 1006 of device 1007 is exported to feedback power distributor
1011；Microcontroller 1009 is by controlling digital signal processing module 1003 to carry out, by aforesaid operations, being effectively improved this
The performance of the multiband Doherty power amplification systems of invention.
As shown in Fig. 2 Fig. 2 is change under the forward direction of the multiband Doherty power amplification systems of an alternative embodiment of the invention
The structural representation of frequency processing module.
In the present embodiment, the forward direction down-converted module 1002 of multiband Doherty power amplification systems of the invention can
With including：
Forward direction down conversion array 10021, attenuator array 10022 and the forward direction analog-to-digital conversion array 10023 being sequentially connected；
The forward direction down conversion array 10021 is connected between forward power distributor 1001 and attenuator array 10022,
The forward direction analog-to-digital conversion array 10023 is connected between attenuator array 10022 and digital signal processing module 1003；
The N roads downlink radio-frequency signal difference that the forward direction down conversion array 10021 is exported to forward power distributor 1001
Down-converted is carried out, and is transmitted by attenuator array 10022 to forward direction analog-to-digital conversion array 10023；The forward direction modulus
Conversion array 10023 carries out analog-to-digital conversion to it and obtains N railway digital intermediate-freuqncy signals, and transmits to digital signal processing module
1003。
In one of the embodiments, multiband Doherty power amplification systems of the invention, the microcontroller 1009 passes through
The attenuation of each attenuator of adjustment attenuator array 10021 controls the gain of each frequency range radiofrequency signal so that multiband
The performance of Doherty power amplification systems is optimal.
As shown in figure 3, Fig. 3 for one embodiment of the present of invention multiband Doherty power amplification systems before upconvert
The structural representation of processing module.
In the present embodiment, the forward direction upconversion process module 1004 of multiband Doherty power amplification systems of the invention is wrapped
Include：The forward direction dac array 10041 that is sequentially connected, preceding upconvert array 10042 and forward-direction filter array 10043；
The forward direction dac array 10041 is connected to digital signal processing module 1003 and before upconverts array
Between 10042, the forward-direction filter array 10043 upconverted before being connected to array 10042 and broadband combiner 1005 it
Between；
Two groups of N roadbed band signals that the forward direction dac array 10041 exports digital signal processing module 1003
Transmit after digital-to-analogue conversion processing to preceding upconverting array 10042 and carry out upconversion process, and pass through forward-direction filter
Array 10043 obtains two groups of N roads output radiofrequency signals after filtering, and transmits to broadband combiner 1005 and be combined processing.
In one of the embodiments, in multiband Doherty power amplification systems of the invention, in the Digital Signal Processing
1003 modules to N railway digitals intermediate-freuqncy signal when carrying out Digital Signal Processing, by the operating current of Doherty power amplification systems and defeated
Go out the target component that power information is adaptively adjusted as digital signal processing module, also just because of Doherty power amplification systems
Operating current and power output just ensure that multiband Doherty power amplifiers to the feedback control of multiband Doherty power amplification systems
Performance of the system at each frequency range is optimal.
As shown in figure 4, Fig. 4 is change under the feedback of the multiband Doherty power amplification systems of an alternative embodiment of the invention
The structural representation of frequency processing module.
In the present embodiment, the feedback down-conversion processing module 1011 of multiband Doherty power amplification systems of the invention can
With including：
Feedback filter array 10111, feedback down-conversion array 10112 and the feedback modulus conversion array being sequentially connected
10113；
The feedback filter array 10111 is connected to feedback power distributor 1010 and feedback down-conversion array 10112
Between, the feedback modulus conversion array 10113 is connected to feedback down-conversion array 10112 and digital signal processing module 1003
Between；
The N roads feedback radiofrequency signal difference that the feedback down-conversion array 10112 is exported to feedback power distributor 1010
Down-converted is carried out, N roads feedback intermediate-freuqncy signal is obtained and transmits to feedback modulus conversion array 10113；The feedback modulus
10113 pairs of feedback intermediate-freuqncy signals of conversion array carry out analog-to-digital conversion, obtain N roads feedback digital intermediate-freuqncy signal, and transmit to numeral
Signal processing module 1003.
In one of the embodiments, in multiband Doherty power amplification systems of the invention, the wide-band coupler 1007
The radiofrequency signal for gathering the signal output part of Doherty power amplifier 1006 is exported to feedback power distributor 1010, described
The feedback radiofrequency signal is divided into N roads feedback radiofrequency signal simultaneously by feedback power distributor 1010 according to the frequency range dividing mode
Output is transmitted to digital signal processing module 1003 to feedback down-conversion processing module 1011, is effectively improved multiband
The performance of Doherty power amplification systems.
In one of the embodiments, multiband Doherty power amplification systems of the invention, the microcontroller 1009 is controlled
Digital signal processing module 1003 is according to default phase value and range value, to the phase and amplitude of Doherty power amplifier
It is adjusted.
As shown in figure 5, Fig. 5 is the multiband Doherty power amplification systems adjustment radio frequency using one embodiment of the present of invention
The method flow diagram of signal phase.
In the present embodiment, multiband Doherty power amplification systems of the invention, the microcontroller by data signal at
Reason module adjusts the phase of certain frequency range Doherty power amplification systems, may include steps of：
Step S501：Using microprocessor control digital signal processing module with steppingAdjust i-th (i=1 ... N) frequencies
Duan Xiangwei, adjusting number of times is(round numbers)；
Step S502：Microcontroller according to each phase adjustment with the corresponding attenuator of the same step by step modulating frequency range extremely
Digital signal processing module, and feedback signal is read, untill feedback signal peak-to-average force ratio (PAR) compression τ (0 ＜ τ≤5) dB；
Step S503：The feedback data that microcontroller is received by digital signal processing module calculates frequency range Doherty
The corresponding power output of power amplification system, and preserve the power output data；
Step S504：The corresponding phase of frequency range Doherty power amplification system Maximum Power Outputs is selected by microcontroller
As i-th (i=1 ... N) frequency range phase value, and transmit to digital signal processing module.
By above-mentioned steps, the phase for the multi-frequency band radio-frequency signal for inputting Doherty power amplification systems can be adjusted,
Make power output of the Doherty power amplification systems under the phase maximum.
As shown in fig. 6, Fig. 6 is the multiband Doherty power amplification systems adjustment radio frequency using one embodiment of the present of invention
The method flow diagram of signal amplitude.
In the present embodiment, multiband Doherty power amplification systems of the invention, the microcontroller by data signal at
Reason module adjusts the amplitude of certain frequency range Doherty power amplification systems, may include steps of：
Step S601：The i-th (i is adjusted with stepping α (0 ＜ α≤1) dB using microprocessor control digital signal processing module
=1 ... N) frequency range amplitude, adjustment amplitude be ± β (0 ＜ β≤5) dB；
Step S602：Adjusted using microcontroller according to each amplitude, adjust the corresponding attenuator of the frequency range to numeral
Signal processing module, and feedback signal is read, untill feedback signal peak-to-average force ratio (PAR) compression τ (0 ＜ τ≤5) dB, now
The power output of Doherty power amplification systems is its peak value saturation power；
Step S603：The feedback data received using microcontroller by digital signal processing module calculates the frequency range
The corresponding power output of Doherty power amplification systems, and preserve the power output；
Step S604：The corresponding attenuator of frequency range Doherty power amplification systems is adjusted to data signal using microcontroller
Processing module, and feedback signal is read, until the power output of Doherty power amplification systems is than its peak value saturation power reduction θ (0
The dB of ＜ θ≤10), preserves current value now；
Step S605：By microcontroller selection in the range of Doherty peak values saturation power ± γ (0 ＜ γ≤1) dB
And current value it is minimum when corresponding range value as i-th (i=1 ... N) frequency range range value, and transmit to Digital Signal Processing mould
Block.
By above-mentioned steps, the amplitude for the multi-frequency band radio-frequency signal for inputting Doherty power amplification systems can be adjusted,
Make efficiency highest of the Doherty power amplification systems under the amplitude.
As shown in fig. 7, Fig. 7 be using one embodiment of the present of invention multiband Doherty power amplification systems to two-band
The method flow diagram that radiofrequency signal is controlled, specific control method may include steps of：
Step 701：The radiofrequency signal of Doherty power amplification systems is inputted after two-way forward power distributor, the is obtained
One frequency range radiofrequency signal and the second frequency range radiofrequency signal；
Step 702：The first frequency range radiofrequency signal becomes the first intermediate-freuqncy signal by the first forward direction down conversion array, the
Two frequency range radiofrequency signals become the second intermediate-freuqncy signal by the second forward direction down conversion array；
Step 703：Above-mentioned first, second intermediate-freuqncy signal sequentially passes through attenuator array and the conversion of forward direction analog-to-digital conversion array
For digital medium-frequency signal, and send digital signal processing module to and carry out Digital Down Convert processing, be changed into baseband signal；
Step 704：Above-mentioned baseband signal is divided into two groups of signals, first group of signal conduct by digital signal processing module
The input of Doherty power amplification system average power amplifier branch roads, another group of signal is used as Doherty power amplification system peak value power amplifier branch roads
Input；
Step 705：Microprocessor control digital signal processing module, sets two branch road correspondences of Doherty power amplification systems
Initial signal amplitude modulation, phase modulation value are 0dm, 0 ° of (explanation：The amplitude modulation and phase modulation of first, second frequency range radiofrequency signal is in Doherty work(
Carried out on signal path where place system average power amplifier branch road)；
Step 706：First group of baseband signal of digital signal processing module output is changed before to dac array
For first group of intermediate-freuqncy signal, second group of baseband signal is converted to second group of intermediate-freuqncy signal before to dac array；
Step 707：First group of intermediate-freuqncy signal is changed into first group of radiofrequency signal before to the first up-conversion array, through filtering
The input of Doherty power amplification system average power amplifier branch roads is used as after ripple device, combiner；Second group of intermediate-freuqncy signal is by preceding to second
Up-conversion array is changed into second group of radiofrequency signal after filtering after device, combiner as Doherty power amplification system peak value power amplifier branch
The input on road；
Step 708：First, second frequency range radiofrequency signal is after Doherty power amplifier is exported, all the way by broadband
Coupler is exported directly as power amplifier, and another road is sampled by wide-band coupler, sequentially passes through feedback power distributor, feedback filter
Digital signal processing module is sent into after ripple device array, feedback down-conversion array, the processing of feedback modulus conversion array, as
Doherty power amplifier power output detects reference signal；
Step 709：Microprocessor control digital signal processing module closes the output of the second frequency range baseband signal, with 2 ° of step
Enter and horizontal phasing control is entered to the first frequency range baseband signal, when adjusting every time, microprocessor control attenuator 1 makes feedback peak-to-average force ratio
(PAR) 3dB, the feedback signal power calculation Doherty work(that then microcontroller is received by digital signal processing module are compressed
Rate amplifier and is recorded in the power output of the frequency range, select Doherty power amplifier power output it is maximum when it is corresponding
Phase, is used as the frequency range phase adjustment value；
Step 710：Microprocessor control digital signal processing module closes the output of the first frequency range baseband signal, utilizes step
709 method determines the phase adjustment value of the second frequency range baseband signal；
Step 711：Microprocessor control digital signal processing module is with width of the 0.5dB steppings to the second frequency range baseband signal
Degree is adjusted, and adjusting range is ± 5dB, when adjusting every time, need to adjust attenuator 1, feedback peak power is compressed 3dB, so
The feedback signal power calculation Doherty power amplifier that microcontroller is received by digital signal processing module afterwards is in the frequency range
Power output and record, then adjust attenuator 1, make its decay 6dB, record corresponding operating current；
Step 712：Select and record performance number model of the Doherty power amplifier peak power output fluctuation ± 0.3
In enclosing and during minimum working current corresponding amplitude as the first frequency range amplitude adjusted value；
Step 713：The input signal and feedback signal information that microcontroller is received by digital signal processing module are calculated
Gain of the Doherty power amplifier in the first frequency range；
Step 714：Microprocessor control digital signal processing module closes the output of the first frequency range baseband signal, opens second
Frequency range baseband signal export, using the method for step 712~713 determine the second frequency range baseband signal amplitude adjusted value and
The gain of Doherty power amplification systems；
Step 715：Regulated attenuator 1 and attenuator 2 are less than the gain inequality of two frequency ranges on the basis of the frequency range of high gain
0.5dB；
Step 716：The output of the first frequency range baseband signal is opened, with identical attenuation, attenuator 1 is reset and declines
Subtract device 2, Doherty power amplification systems is operated in the power output of requirement.
By above-mentioned steps, the adjustment of the gain of two-band radiofrequency signal to inputting Doherty power amplification systems is realized,
And then the power output and efficiency of the Doherty power amplification systems of each frequency range are adaptively adjusted, make Doherty power amplifiers system
The performance of system is optimal；Cumbersome manual debugging is it also avoid simultaneously, is conducive to improving production efficiency.
In the present embodiment, multiband Doherty power amplification systems of the invention, can also include：It is connected to broadband combining
Gain module after device, the gain for calculating multiband Doherty power amplification systems.
In one of the embodiments, multiband Doherty power amplification systems of the invention, the microcontroller 1009 passes through
The attenuation of each attenuator of adjustment attenuator array 10022 controls the gain of each frequency range radiofrequency signal.
In one of the embodiments, multiband Doherty power amplification systems of the invention, the basis of microcontroller 1009
The feedback intermediate-freuqncy signal information that digital signal processing module 1003 is received calculates power；Meanwhile, according to current detection module 1008
The current information of detection, calculates the efficiency of Doherty power amplifier；By the power and efficiency information, for controlling numeral
Adjustment of the signal processing module to the phase and amplitude of Doherty power amplifier 1006.
In one of the embodiments, multiband Doherty power amplification systems of the invention, the digital signal processing module
The 1003 N roads feedback digital intermediate-freuqncy signals exported according to the feedback down-conversion processing module 1011, calculate Doherty power and put
The power output and efficiency of each amplitude modulation and phase modulation of the big correspondence of device 1006, so as to enter to the power of multiband Doherty power amplification systems
The adaptive adjustment of row.
Above-mentioned multiband Doherty power amplification systems, by microcontroller using digital signal processing module come to being input to
The amplitude and phase of the radiofrequency signal of multiband Doherty power amplification systems are adjusted, and are calculated corresponding to the frequency range
The power output and efficiency of Doherty power amplification systems；Digital signal processing module is according to the power output and the feedback received
Information, controls the gain of frequency range Doherty power amplification systems, is optimal its performance；Above-mentioned multiband Doherty power amplifiers system
System can be automatically adjusted to the power output, efficiency and gain of multiband Doherty power amplification systems, it is to avoid cumbersome hand
Dynamic debugging, is conducive to the raising of production efficiency.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of multiband Doherty power amplification systems, it is characterised in that including：Forward power distributor, forward direction down-converted
Module, digital signal processing module, forward direction upconversion process module, broadband combiner, Doherty power amplifier, broadband coupling
Clutch, current detection module, microcontroller, feedback power distributor, feedback down-conversion processing module；
The forward power distributor, forward direction down-converted module, digital signal processing module, forward direction upconversion process mould
Block, broadband combiner, Doherty power amplifier and wide-band coupler are sequentially connected；The current detection module connection
Doherty power amplifier, and digital signal processing module is connected by microcontroller；The wide-band coupler connection
The signal output part of Doherty power amplifier, and pass sequentially through feedback power distributor, the connection of feedback down-conversion processing module
Digital signal processing module；
The downlink radio-frequency signal of input is divided into that N roads are descending to be penetrated by the forward power distributor according to the frequency range dividing mode of setting
Frequency signal, and transmit to forward direction down-converted module；
The forward direction down-converted module carries out down-converted respectively to N roads downlink radio-frequency signal, obtains N railway digitals
Intermediate-freuqncy signal, and transmit to digital signal processing module；
The digital signal processing module is by microcontroller according under the operating current information of Doherty power amplification systems and feedback
The feedback digital intermediate-freuqncy signal power information of the corresponding frequency band of frequency-conversion processing module output is carried out to N railway digitals intermediate-freuqncy signal respectively
Digital Signal Processing, obtains two groups of N roadbed band signals, and transmit to forward direction upconversion process module；
The forward direction upconversion process module carries out upconversion process respectively to two groups of N roadbeds band signals, obtains two groups of N roads outputs
Radiofrequency signal, and transmit to broadband combiner；
Two groups of N roads are exported radiofrequency signals and are respectively synthesized as two-way radiofrequency signal by the broadband combiner, and are transmitted to Doherty
Power amplifier is exported after being amplified；
The operating current of current detection module detection Doherty power amplifier as microprocessor control data signal at
Manage the parameter information of module；
The radiofrequency signal of the signal output part of the wide-band coupler collection Doherty power amplifier is exported to feedback power point
Orchestration；
The feedback radiofrequency signal is divided into N roads feedback radio frequency letter by the feedback power distributor according to the frequency range dividing mode
Number and export to feedback down-conversion processing module.
2. multiband Doherty power amplification systems according to claim 1, it is characterised in that the forward direction down-converted
Module includes：
Forward direction down conversion array, attenuator array and the forward direction analog-to-digital conversion array being sequentially connected；
The forward direction down conversion array is connected between forward power distributor and attenuator array, the forward direction analog-to-digital conversion battle array
Row are connected between attenuator array and digital signal processing module；
The N roads downlink radio-frequency signal that the forward direction down conversion array is exported to forward power distributor is carried out at down coversion respectively
Reason, and transmitted by attenuator array to forward direction analog-to-digital conversion array, the forward direction analog-to-digital conversion array carries out modulus to it and turned
Get N railway digital intermediate-freuqncy signals in return, and transmit to digital signal processing module.
3. multiband Doherty power amplification systems according to claim 1, it is characterised in that the forward direction upconversion process
Module includes：
The forward direction dac array that is sequentially connected, preceding upconvert array and forward-direction filter array；
The forward direction dac array be connected to digital signal processing module and before upconvert between array, the forward direction filter
Ripple device array is upconverted between array and broadband combiner before being connected to；
The N roadbeds band signal that the forward direction dac array exports digital signal processing module carries out digital-to-analogue conversion and handles it
After transmit to preceding upconvert array carry out upconversion process, and by forward-direction filter array filtering after obtain N roads output penetrate
Frequency signal, and transmit to broadband combiner.
4. multiband Doherty power amplification systems according to claim 1, it is characterised in that the feedback down-conversion processing
Module includes：
Feedback filter array, feedback down-conversion array and the feedback modulus conversion array being sequentially connected；
The feedback filter array is connected between feedback power distributor and feedback down-conversion array, and the feedback modulus turns
Array is changed to be connected between feedback down-conversion array and digital signal processing module；
The N roads feedback radiofrequency signal that the feedback down-conversion array is exported to feedback power distributor is carried out at down coversion respectively
Reason, obtains N roads feedback intermediate-freuqncy signal and transmits to feedback modulus conversion array；The feedback modulus conversion array is to feedback intermediate frequency
Signal carries out analog-to-digital conversion, obtains N roads feedback digital intermediate-freuqncy signal, and transmit to digital signal processing module.
5. multiband Doherty power amplification systems according to claim 1, it is characterised in that the microprocessor control number
Word signal processing module is according to default phase value and range value, and the phase and amplitude to Doherty power amplifier is adjusted
It is whole.
6. multiband Doherty power amplification systems according to claim 5, it is characterised in that the microcontroller：
Digital signal processing module is controlled with steppingThe i-th frequency range phase is adjusted, adjustment number of times isWherein, i=1 ...
N,Value round numbers；
According to each phase adjustment with the corresponding attenuator of the identical step by step modulating frequency range to digital signal processing module, and
Feedback signal is read, untill feedback signal peak-to-average force ratio compression τ dB, now the power output of Doherty power amplification systems is it
Peak value saturation power；Wherein, 0 ＜ τ≤5；
The feedback data received by digital signal processing module calculates the corresponding output work of frequency range Doherty power amplification systems
Rate, and preserve the power output；
The corresponding phase of frequency range Doherty power amplification system Maximum Power Outputs is selected as the i-th frequency range phase value, and transmit to
Digital signal processing module.
7. multiband Doherty power amplification systems according to claim 5, it is characterised in that the microcontroller：
Digital signal processing module is controlled to adjust the amplitude of the i-th frequency range with stepping α dB, adjustment amplitude is ± β dB；Wherein, 0 ＜ α
≤ 1, i=1 ... N, 0 ＜ β≤5；
Adjusted according to each amplitude, adjust the corresponding attenuator of the frequency range to digital signal processing module, and read feedback letter
Number, untill feedback signal peak-to-average force ratio compression τ dB, now the power output of Doherty power amplification systems is its peak value saturation work(
Rate；Wherein, 0 ＜ τ≤5；
The feedback data received by digital signal processing module calculates the corresponding output work of frequency range Doherty power amplification systems
Rate, and preserve the power output data；
The corresponding attenuator of frequency range Doherty power amplification systems is adjusted to digital signal processing module, and reads feedback signal, directly
To Doherty output peak power ratios, its peak value saturation power reduces θ dB, preserves current value now；Wherein, 0 ＜ θ≤10；
Selection in the range of Doherty peak values saturation power ± γ dB and when current value is minimum corresponding range value be used as the i-th frequency
Section range value, and transmit to digital signal processing module；Wherein, 0 ＜ γ≤1.
8. multiband Doherty power amplification systems according to claim 2, it is characterised in that the microcontroller is by adjusting
The attenuation of whole each attenuator of attenuator array controls the gain of each frequency range radiofrequency signal.
9. multiband Doherty power amplification systems according to claim 5, it is characterised in that the Digital Signal Processing mould
The operating current that root tuber is exported according to current detection module, calculates the power output of Doherty power amplifier, and transmits to micro-control
Device processed, the adjustment of the phase and amplitude for controlling Doherty power amplifier.
10. multiband Doherty power amplification systems according to claim 5, it is characterised in that the Digital Signal Processing mould
The N roads feedback digital intermediate-freuqncy signal that root tuber is exported according to the feedback down-conversion processing module, calculates Doherty power amplifier pair
Answer the power output and efficiency of each amplitude modulation and phase modulation.
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| CN106253862A (en) * | 2016-08-04 | 2016-12-21 | 成都博思微科技有限公司 | A kind of high equivalent bandwidth and the amplifying circuit of the high-gain linearity |
| CN109088606A (en) * | 2017-06-14 | 2018-12-25 | 中兴通讯股份有限公司 | A kind of power amplifier quiescent current method of adjustment, device, system and storage medium |
| CN107395147A (en) * | 2017-08-04 | 2017-11-24 | 杭州长泽科技有限公司 | A kind of implementation method of power amplifier stability primary and secondary standby system |
| CN109462382B (en) * | 2018-10-26 | 2022-07-29 | 京信网络系统股份有限公司 | Power amplification system, power measurement and control method, device and base station equipment |
| CN109495077A (en) * | 2018-11-08 | 2019-03-19 | 苏州全波通信技术股份有限公司 | Adaptive digital amplitude modulation and phase modulation system |
| CN110198174B (en) * | 2019-05-29 | 2022-03-25 | 京信网络系统股份有限公司 | Radio frequency front end transmitting circuit, radio frequency front end circuit, transceiver and base station equipment |
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