JP2006287439A - Radio transmitter-receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio transmitter-receiver which can be adaptive to simultaneous transmission/reception, of which the reception characteristics is prevented from deteriorating due to erroneous frequency conversion performed when the frequency of a radio signal is changed, and of which the constitution is prevented from being complicated. <P>SOLUTION: The radio transmitter-receiver comprises: a local transmitter L1 for generating a first local transmission signal; a local transmitter L2 for generating a second local transmission signal having the frequency different from that of the first local transmission signals; a transmission RF mixer M1 and a reception RF mixer M2 for converting the frequency by using one of the local transmission signals; a switching part 60 for outputting each of the two local transmission signals to the transmission RF mixer M1 or the reception RF mixer M2; and a control part 53 for performing control for making the switching part 60 output one of the two local transmission signals to the transmission RF mixer M1 and simultaneously output the other local transmission signal to the reception RF mixer M2 in the case of simultaneously performing transmission and reception. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless transmission / reception device, and more particularly to a wireless transmission / reception device that performs transmission and reception simultaneously.

  In a mobile communication system, various systems such as an FDMA (Frequency Division Multiple Access) system, a TDMA (Time Division Multiple Access) system, a CDMA (Code Division Multiple Access system), etc. are adopted, for example, PHS (Personal Handy-Phone System). In the PHS, for example, one frame is composed of 8 slots, and the uplink (communication from the wireless terminal station to the wireless base station) is performed in the THS / TDD (Time Division Multiple Access / Time Division Duplex) system. (Direction) 4 slots and downlink (communication direction from the radio base station to the radio terminal station) 4 slots In this way, in the TDMA / TDD system, uplink and downlink communications are performed at different timings. In order to increase the communication speed of the system, a method of simultaneously performing uplink and downlink communications (hereinafter the same) Hereinafter, the wireless terminal station and the wireless base station are collectively referred to as a wireless transmission / reception apparatus.

  In this method, since the radio transmission / reception apparatus needs to perform transmission and reception at the same time, the amplified noise together with the transmission signal and the transmission signal leaks to the reception unit of the radio transmission / reception apparatus. Considering the wireless terminal station side, a transmission signal and noise transmitted from the wireless terminal station to the wireless base station are combined with the received signal received from the wireless base station, which causes a problem that reception characteristics of the wireless terminal station deteriorate. This is because the reception signal received by the wireless transceiver normally has a weak power compared to the transmission signal transmitted by itself, so the influence of the transmission signal and noise leaking to the reception unit on the reception signal is ignored. It will be impossible. In the FDD (Frequency Division Duplex) system in which the upstream and downstream frequencies are different, since the transmission signal and the reception signal can be separated by a duplexer that is a kind of filter, leakage of the transmission signal and noise to the reception unit is not a problem. .

In order to solve such a problem, for example, Patent Document 1 discloses the following wireless transmission / reception apparatus. That is, the vector adjuster generates a pseudo transmission signal having the same amplitude and opposite phase as the transmission signal leaking to the receiving unit. The directional coupler receives the reception signal and the pseudo transmission signal which are synthesized by leaking the transmission signal, and removes the transmission signal component of the reception signal. With such a configuration, it is possible to reduce deterioration of reception characteristics due to transmission signal leakage in the simultaneous transmission and reception method.
JP 2003-273770 A

  By the way, in order for the wireless transmission / reception apparatus to perform simultaneous transmission / reception, the frequency of the carrier wave of the radio signal transmitted by the wireless transmission / reception apparatus and the frequency of the carrier wave of the radio signal received by the wireless transmission / reception apparatus should be different. For example, as described above, when the radio transmission / reception apparatus performs transmission and reception at the same time, the transmission signal transmitted by itself leaks to the reception signal, but the carrier frequency of the leaked transmission signal is the carrier frequency of the reception signal. This is because the CNR (Carrier to Noise Ratio) becomes small and the reception characteristics are greatly degraded.

  Therefore, in order to transmit and receive radio signals having different carrier frequencies, the radio terminal station converts at least two local oscillators, that is, IF (Intermediate Frequency) signals or baseband signals to be transmitted into radio signals. It is necessary to provide a local transmitter that outputs a local transmission signal for frequency conversion and a local transmitter that outputs a local transmission signal for frequency conversion of the received radio signal to an IF signal or a baseband signal.

  By the way, in order to prevent mutual interference between adjacent wireless transmission / reception devices, it is necessary to communicate with a wireless transmission / reception device as a communication partner by transmitting / receiving a radio signal having a different carrier frequency from other adjacent wireless transmission / reception devices. . The wireless transmission / reception apparatus recognizes a channel to be used by, for example, a process of measuring whether a channel to be used, which is called carrier sense, is free, and changes the frequency of the carrier wave of the wireless signal for each communication partner.

  Here, it is difficult to instantaneously change the frequency of the local transmission signal output from the local transmitter to a new frequency, and a certain period of time (lock-up time) to converge the local transmission signal to the new frequency is required. When a local transmission signal in a transient state that has not yet converged to a new frequency is used for frequency conversion, the transmission characteristics and reception characteristics of the wireless transmission / reception apparatus are greatly degraded.

  Therefore, in order to prevent such a transient local transmission signal from being used for frequency conversion and deteriorating the transmission characteristics and reception characteristics of the wireless transceiver, two local transmitters for transmission and reception, respectively, The configuration includes a total of four local transmitters, and when one of the local transmitters is used, the other local transmitter is controlled to change the frequency of the local transmission signal to a desired new frequency. is necessary.

  Therefore, in the wireless transmission / reception apparatus described in Patent Document 1, it is necessary to provide four local transmitters in order to support simultaneous transmission / reception and to prevent deterioration of transmission / reception characteristics when changing the frequency of the carrier wave of the wireless signal, There is a problem that the power consumption, the mounting area, and the production cost increase due to the complicated configuration.

  Therefore, an object of the present invention is to support simultaneous transmission and reception, and to prevent deterioration of transmission and reception characteristics caused by using a transient local transmission signal for frequency conversion when changing the frequency of a radio signal, and An object of the present invention is to provide a wireless transmission / reception device capable of preventing the configuration from becoming complicated.

  In order to solve the above-described problem, a wireless transmission / reception apparatus according to an aspect of the present invention is a wireless transmission / reception apparatus capable of simultaneous transmission / reception that performs transmission and reception simultaneously, and generates a first local transmission signal. Using the local transmitter, the second local transmitter that generates a second local transmission signal having a frequency different from that of the first local transmission signal, and the first local transmission signal or the second local transmission signal, A transmission RF mixer that converts the frequency of the baseband signal or IF signal into a transmission signal, a transmission unit that transmits the transmission signal, a reception unit that receives the reception signal, and a first local transmission signal or a second local transmission signal A reception RF mixer that frequency-converts the received reception signal into a baseband signal or an IF signal, a first local transmission signal is output to the transmission RF mixer or the reception RF mixer, and a second When performing simultaneous transmission and reception with a switching unit that outputs a local transmission signal to a transmission RF mixer or a reception RF mixer, either one of a first local transmission signal and a second local transmission signal is transmitted to the switching unit. And a control unit that performs control to output the other local transmission signal to the reception RF mixer.

  Preferably, the switching unit includes a first switch, a second switch, a third switch, and a distributor, and each of the first switch, the second switch, and the third switch is a first switch. The first terminal of the first switch is connected to the first local oscillator, and the second terminal of the first switch is the distributor. The second local oscillator is connected to the first terminal of the second switch, the third terminal of the first switch is connected to the second terminal of the second switch, The first terminal of the third switch is connected to the third terminal of the second switch, the first output of the distributor is connected to the second terminal of the third switch, and the third terminal of the third switch The receiving RF mixer is connected to the The second output of the device is connected to the transmission RF mixer, and the control unit, when performing simultaneous transmission and reception, conducts between the first terminal and the second terminal in the first switch, and Control is performed such that the first terminal and the third terminal of the second switch are electrically connected and the first terminal and the third terminal of the third switch are electrically connected.

  More preferably, when the control unit does not perform simultaneous transmission and reception and transmits a transmission signal, the control unit conducts between the first terminal and the second terminal in the first switch, and Control to conduct between the first terminal and the third terminal in the switch, or conduct between the second terminal and the third terminal in the first switch, and the second When conducting control between conducting the first terminal and the second terminal of the switch and conducting the conduction between the first terminal and the third terminal of the third switch and not performing simultaneous transmission and reception When receiving a received signal, the first switch in the first switch is electrically connected to the second terminal, and the second switch is connected to the third terminal in the third switch. Control to turn on , The first terminal of the second switch and to conduction between the third terminal, and performs control of conduction between the first terminal and the third terminal of the third switch.

  Preferably, the switching unit includes a first switch, a second switch, a third switch, and a fourth switch, wherein the first switch, the second switch, and the third switch are respectively A first terminal, a second terminal, and a third terminal, wherein the first local oscillator is connected to the first terminal of the first switch, and the second terminal of the first switch is connected to the second terminal; The first terminal of the second switch is connected, the first terminal of the fourth switch is connected to the third terminal of the first switch, and the transmission RF mixer is connected to the second terminal of the second switch. The second local oscillator is connected to the first terminal of the third switch, the third terminal of the second switch is connected to the second terminal of the third switch, and the fourth switch Receive at the second terminal at When the F mixer is connected, the third terminal in the fourth switch is connected to the third terminal in the third switch, and the controller performs simultaneous transmission and reception, the first terminal in the first switch Between the first terminal and the second terminal, and between the first terminal and the second terminal in the second switch, and between the first terminal and the third terminal in the third switch. A control is performed to conduct between the terminals and between the second terminal and the third terminal in the fourth switch, or the first terminal and the third in the first switch Between the second terminal and the third terminal of the second switch, and between the first terminal and the second terminal of the third switch. And the first terminal of the fourth switch Performs control to conduct between the second terminal.

  More preferably, when the control unit does not perform simultaneous transmission / reception and transmits a transmission signal, the control unit conducts between the first terminal and the second terminal in the first switch, and Control to conduct between the first terminal and the second terminal in the switch, or conduct between the second terminal and the third terminal in the second switch, and the third When the control is performed to conduct between the first terminal and the second terminal in the switch and the simultaneous transmission / reception is not performed and the reception signal is received, the first terminal and the third terminal in the third switch A control is performed to conduct between the terminals and between the second terminal and the third terminal in the fourth switch, or the first terminal and the third in the first switch Conduction between terminals Performs control of conduction between the first terminal and the second terminal of the fourth switch.

  Preferably, the radio transmission / reception apparatus further controls the frequency of the first local transmission signal or the frequency of the second local transmission signal by controlling the first local transmitter or the second local transmitter corresponding to the transmission signal. A local transmission signal control unit to be changed, and a transmission control unit that controls the transmission unit to stop transmission of a transmission signal generated by the transmission RF mixer using the local transmission signal whose frequency is changed, for a predetermined period.

  Preferably, the wireless transmission / reception apparatus further controls the frequency of the first local transmission signal or the frequency of the second local transmission signal by controlling the first local transmitter or the second local transmitter corresponding to the received signal. A local transmission signal control unit to be changed, and a reception control unit that controls the reception unit to stop receiving a reception signal whose frequency is converted by the reception RF mixer using the local transmission signal whose frequency is changed.

  According to the present invention, it is possible to simultaneously transmit / receive, prevent deterioration of transmission / reception characteristics due to the use of a transient local transmission signal for frequency conversion when changing the frequency of a radio signal, and Complexity can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
[Configuration and basic operation]
FIG. 1 is a configuration diagram of a radio transmission / reception apparatus according to the first embodiment of the present invention.

  Referring to the figure, this wireless transmission / reception apparatus includes a modulation unit 1, an amplification unit 2, a transmission RF mixer M1, a transmission unit 51, a reception unit 52, a reception RF mixer M2, and a bandpass filter 8. , Demodulator 9, controller 53, circulator 5, antenna 6, variable local transmitters L <b> 1 to L <b> 2, and switching unit 60.

  The transmission unit 51 includes a bandpass filter 3 and an amplification unit 4. The receiving unit 52 includes the amplifying unit 7.

  The switching unit 60 includes a switch SW1 and a switch SW2. The switch SW1 includes a terminal ta1 to a terminal ta3. Switch SW2 includes terminals tb1 to tb3.

  The terminal ta1 in the switch SW1 is connected to the variable local oscillator L1, and the terminal ta2 in the switch SW1 is connected to the transmission RF mixer M1 and the terminal tb2 in the switch SW2. Terminal ta3 in switch SW1 is connected to reception RF mixer M2 and terminal tb3 in switch SW2. A terminal tb1 in the switch SW2 is connected to the variable local oscillator L2.

  The modulation unit 1 modulates the baseband signal and outputs it to the amplification unit 2.

  The amplifying unit 2 amplifies the modulated baseband signal received from the modulating unit 1 and outputs the amplified baseband signal to the transmission RF mixer M1.

  The transmission RF mixer M1 frequency-converts the amplified baseband signal received from the amplifying unit 2 into an RF (Radio Frequency) band transmission signal using the local transmission signal received from the switching unit 60. Note that a mixer that converts the baseband signal into an IF (Intermediate Frequency) signal is disposed in the preceding stage of the transmission RF mixer M1, and the transmission RF mixer M1 converts the IF signal into an RF band transmission signal. Good.

  The bandpass filter 3 attenuates the frequency component in the frequency region outside the band of the signal to be communicated (hereinafter also referred to as main signal) among the frequency components of the transmission signal received from the transmission RF mixer M1.

  The amplifying unit 4 amplifies the transmission signal received from the band pass filter 3 and outputs the amplified signal to the circulator 5.

  The circulator 5 outputs the transmission signal received from the amplification unit 4 to the antenna 6 and simultaneously outputs the reception signal received from the antenna 6 to the amplification unit 7.

  The circulator 5 is not essential in the wireless transmission / reception apparatus according to the present invention. The wireless transmission / reception apparatus according to the present invention does not include the circulator 5, and the other wireless transmission / reception that receives the transmission signal received from the amplification unit 4 as a communication partner The antenna may be configured to include an antenna that transmits to the apparatus and an antenna that outputs a reception signal received from another wireless transmission / reception apparatus serving as a communication partner to the amplification unit 7.

  The antenna 6 transmits the transmission signal received from the circulator 5 to another wireless transmission / reception device that is a communication partner. The antenna 6 outputs a reception signal received from another wireless transmission / reception device that is a communication partner to the circulator 5.

  The amplification unit 7 amplifies the received signal in the RF band received from the circulator 5 and outputs the amplified signal to the reception RF mixer M2.

  The reception RF mixer M2 uses the local transmission signal received from the switching unit 60 to frequency-convert the amplified reception signal received from the amplification unit 7 into a baseband signal. The receiving RF mixer M2 frequency-converts the received signal in the RF band into an IF signal, and a mixer that converts the IF signal received from the receiving RF mixer M2 into a baseband signal is arranged at the subsequent stage of the receiving RF mixer M2. It may be a configuration.

  The band pass filter 8 attenuates the frequency components in the frequency region outside the main signal band among the frequency components of the baseband signal received from the reception RF mixer M2.

  The demodulator 9 demodulates the baseband signal received from the bandpass filter 8.

  The control unit 53 performs control to change the frequency of the local transmission signal output from the variable local transmitter L1 and the variable local transmitter L2 according to the frequency of the carrier wave of the transmission signal and the reception signal selected by the wireless transmission / reception apparatus. When simultaneous transmission / reception is performed, the control unit 53 transmits to the switching unit 60 either one of the local transmission signal output from the variable local transmitter L1 and the local transmission signal output from the variable local transmitter L2. At the same time as outputting to the mixer M1, the other local transmission signal is controlled to be output to the reception RF mixer M2.

[Operation]
Next, the operation when the radio transmission / reception apparatus according to the present embodiment switches the frequency of the carrier wave of the transmission signal and the reception signal will be described.

  In the following description, it is first assumed that the variable local oscillator L1 outputs a local transmission signal having the frequency f1, and the variable local oscillator L2 outputs a local transmission signal having the frequency f5.

  FIG. 2 is a diagram illustrating an example of the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal in each slot in one frame when the wireless transmission / reception apparatus according to the present embodiment performs simultaneous transmission / reception.

  First, in the slot 0, the control unit 53 performs control so that the terminals ta1 and ta2 in the switch SW1 are electrically connected and the terminals tb1 and tb3 in the switch SW2 are electrically connected. As a result, a local transmission signal having the frequency f1 is output to the transmission RF mixer M1, and a local transmission signal having the frequency f5 is output to the reception RF mixer M2. Therefore, a transmission signal having a carrier frequency f1 can be transmitted, and a reception signal having a carrier frequency f5 can be received.

  Next, in the slot 1, the control unit 53 performs control so that the terminals ta1 and ta3 in the switch SW1 are electrically connected and the terminals tb1 and tb2 in the switch SW2 are electrically connected. As a result, a local transmission signal having the frequency f5 is output to the transmission RF mixer M1, and a local transmission signal having the frequency f1 is output to the reception RF mixer M2. Therefore, a transmission signal having a carrier frequency f5 can be transmitted, and a reception signal having a carrier frequency f1 can be received.

  Similarly, the control unit 53 switches the conduction state of the switch SW1 and the conduction state of the switch SW2 for each slot, so that the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal are not erroneously converted. Can be changed alternately for each slot. In other words, the radio transmission / reception apparatus according to the present embodiment can communicate with a plurality of radio transmission / reception apparatuses having different carrier frequencies of radio signals in temporally continuous slots.

  When the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal are not changed in the next slot, the control unit 53 sets the conduction state of the switch SW1 and the conduction state of the switch SW2 in the next slot to the next slot. It may be maintained in the case.

  Further, it is desirable that the control unit 53 performs the same control as in the case where simultaneous transmission / reception is performed even when simultaneous transmission / reception is not performed. This is because, for example, when the control unit 53 performs control to conduct between the terminal ta1 and the terminal ta2 in the switch SW1 and to conduct between the terminal tb1 and the terminal tb2 in the switch SW2, to the transmission RF mixer M1. This is because the local transmission signal having the frequency f1 and the local transmission signal having the frequency f5 are simultaneously output, and erroneous frequency conversion is performed. When simultaneous transmission / reception is not performed, the control unit 53 determines the frequency of the local transmission signal output from the other variable local transmitter when one of the variable local transmitters is used for transmission or reception. Control to change can be performed.

  Note that the switch SW1 and the switch SW2 may be configured such that none of the three terminals is conductive. In this case, the control unit 53 makes the three terminals in the switch corresponding to the unused variable local oscillator non-conductive and, as described above, 2 in the switch corresponding to the variable local oscillator to be used. It can be set as the structure which performs the control which conducts between the terminals. That is, when the local transmission signal of the variable local transmitter L1 is not used, the control unit 53 makes the three terminals of the switch SW1 non-conductive, and when the local transmission signal of the variable local transmitter L2 is not used. In the control, the three terminals of the switch SW2 are made non-conductive. With such a configuration, the local transmission signal having the frequency f1 and the local transmission signal having the frequency f5 are simultaneously output to the transmission RF mixer M1 or the reception RF mixer M2, and erroneous frequency conversion is performed, so that reception characteristics deteriorate. Can be prevented.

  Further, in the wireless transmission / reception apparatus according to the present embodiment shown in FIG. 1, reflection or the like is reflected at the junction of the path from terminal ta2 to transmission RF mixer M1 in switch SW1 and the path from terminal tb2 to transmission RF mixer M1 in switch SW2. It is also possible to employ a configuration in which a synthesizer that reduces the influence of the above is arranged. With such a configuration, it is possible to prevent the transmission signal from being deteriorated due to the deterioration of the local transmission signal output to the transmission RF mixer M1.

  Further, in the wireless transmission / reception apparatus according to the present embodiment shown in FIG. 1, reflection or the like is performed at the junction of the path from terminal ta3 to reception RF mixer M2 in switch SW1 and the path from terminal tb3 to reception RF mixer M2 in switch SW2. It is also possible to employ a configuration in which a synthesizer that reduces the influence of the above is arranged. With such a configuration, it is possible to prevent the deterioration of the reception signal due to the deterioration of the local transmission signal output to the reception RF mixer M2.

  FIG. 3 is a diagram illustrating a case where each wireless transmission / reception apparatus according to the present embodiment performs simultaneous transmission / reception and changes the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal to a new frequency. It is a figure showing an example of the frequency of the carrier wave of a transmission signal, and the frequency of the carrier wave of a received signal.

  When the radio transmitting / receiving apparatus according to the present embodiment needs to change the frequency of the carrier wave of the transmission signal to a new frequency in slot 4, the control unit 53 uses variable local oscillator L1 or variable local transmission in slot 3. Control is performed to change the frequency of the local transmission signal output from the device L2. In addition, in the slot 3, the control unit 53 stops the transmission unit 51 from transmitting the transmission signal for a period sufficient for the local transmission signal output from the variable local transmitter L1 or the variable local transmitter L2 to be changed to a new frequency. To control.

  Here, the control unit 53 stops transmission of the transmission signal by performing control such as stopping the power supply to the amplification unit 4 included in the transmission unit 51.

  In addition, when the radio transceiver apparatus according to the present embodiment needs to change the frequency of the carrier wave of the received signal to a new frequency in slot 4, the control unit 53 can change the variable local oscillator L1 or variable in slot 3. Control is performed to change the frequency of the local transmission signal output from the local transmitter L2. In addition, in the slot 3, the control unit 53 stops the reception unit 52 from receiving the reception signal for a period sufficient for the local transmission signal output from the variable local transmitter L1 or the variable local transmitter L2 to be changed to a new frequency. To control.

  Here, the control unit 53 stops the reception of the reception signal by performing control such as stopping the power supply to the amplification unit 7 included in the reception unit 52.

  With such a configuration, transmission and reception in simultaneous transmission and reception are prevented while preventing deterioration in transmission and reception characteristics due to the use of the local transmission signal in a transient state for frequency conversion in the wireless transmission and reception device until the frequency of the local transmission signal is stabilized. Two or more types of carrier frequencies can be selected for each signal and received signal.

[Modification of First Embodiment]
FIG. 4 is a configuration diagram of a modified example of the wireless transmission / reception apparatus according to the first embodiment of the present invention.

  With reference to the figure, this radio | wireless transmission / reception apparatus is provided with the switching part 61 instead of the switching part 60 with respect to the radio | wireless transmission / reception apparatus which concerns on 1st Embodiment. Note that the modulation unit 1, the amplification unit 2, the band pass filter 3, the amplification unit 4, the circulator 5, the antenna 6, the amplification unit 7, the band pass filter 8, the demodulation unit 9, and the control unit 53. Although not shown, the configuration of each of these blocks is the same as that of the wireless transmission / reception apparatus according to the first embodiment shown in FIG.

  Switching unit 61 includes a switch SW3 and a switch SW4. The switch SW3 includes terminals tc1 to tc3. The switch SW4 includes terminals td1 to td3.

  The terminal tc1 in the switch SW3 is connected to the variable local oscillator L1 and the terminal td1 in the switch SW4. A terminal tc2 in the switch SW1 is connected to the transmission RF mixer M1. Terminal tc3 in switch SW1 is connected to variable local oscillator L2 and terminal td3 in switch SW2. A terminal td2 in the switch SW2 is connected to the reception RF mixer M2.

  Other configurations and basic operations are the same as those of the wireless transmission / reception apparatus according to the first embodiment.

[Operation]
Next, the operation when the radio transmission / reception apparatus shown in FIG. 4 switches the frequency of the carrier wave of the transmission signal and the reception signal will be described.

  In the following description, it is first assumed that the variable local oscillator L1 outputs a local transmission signal having the frequency f1, and the variable local oscillator L2 outputs a local transmission signal having the frequency f5.

  First, in the slot 0, the control unit 53 performs control so that the terminal tc1 and the terminal tc2 in the switch SW3 are electrically connected and the terminal td2 and the terminal td3 in the switch SW4 are electrically connected. As a result, a local transmission signal having the frequency f1 is output to the transmission RF mixer M1, and a local transmission signal having the frequency f5 is output to the reception RF mixer M2. Therefore, a transmission signal having a carrier frequency f1 can be transmitted, and a reception signal having a carrier frequency f5 can be received.

  Next, in the slot 1, the control unit 53 performs control so that the terminal tc2 and the terminal tc3 in the switch SW3 are electrically connected and the terminal td1 and the terminal td2 in the switch SW4 are electrically connected. As a result, a local transmission signal having the frequency f5 is output to the transmission RF mixer M1, and a local transmission signal having the frequency f1 is output to the reception RF mixer M2. Therefore, a transmission signal having a carrier frequency f5 can be transmitted, and a reception signal having a carrier frequency f1 can be received.

  Similarly, the control unit 53 switches the conduction state of the switch SW3 and the conduction state of the switch SW4 for each slot, so that the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal are not erroneously converted. Can be changed alternately for each slot. Therefore, similarly to the wireless transmission / reception apparatus according to the first embodiment, the wireless transmission / reception apparatus according to the present embodiment switches between the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal as shown in FIG. Can be done. That is, it is possible to communicate with a plurality of wireless transmission / reception devices having different carrier frequencies of wireless signals in temporally continuous slots.

  In the modification of the wireless transmission / reception apparatus according to the present embodiment shown in FIG. 4, the path from variable local oscillator L1 to terminal tc1 in switch SW1 and the path from variable local oscillator L1 to terminal td1 in switch SW2 A configuration may be adopted in which a distributor that reduces the influence of reflection or the like is arranged at the branch point. With such a configuration, it is possible to prevent the transmission signal or the reception signal from being deteriorated due to the deterioration of the local transmission signal output from the variable local transmitter L1.

  Further, in the modification of the radio transceiver according to the present embodiment shown in FIG. 4, the path from the variable local oscillator L2 to the terminal tc3 in the switch SW3 and the path from the variable local oscillator L2 to the terminal td3 in the switch SW4 A configuration may be adopted in which a distributor that reduces the influence of reflection or the like is arranged at the branch point. With such a configuration, it is possible to prevent the transmission signal or the reception signal from being deteriorated due to the deterioration of the local transmission signal output from the variable local transmitter L2.

  By the way, in the wireless transmission / reception apparatus described in Patent Document 1, it is necessary to include four local transmitters in order to support simultaneous transmission / reception and to prevent deterioration in transmission / reception characteristics when changing the frequency of a carrier wave of a wireless signal. There is a problem that the power consumption, the mounting area, and the production cost increase due to the complicated configuration.

  However, the wireless transmission / reception apparatus according to the embodiment of the present invention includes only two variable local transmitters, variable local transmitter L1 and variable local transmitter L2. When simultaneous transmission / reception is performed, the control unit 53 transmits to the switching unit 60 either one of the local transmission signal output from the variable local transmitter L1 and the local transmission signal output from the variable local transmitter L2. At the same time as outputting to the mixer M1, the other local transmission signal is controlled to be output to the reception RF mixer M2. Further, the control unit 53 switches the conduction state of the switch SW3 and the conduction state of the switch SW4 for each slot, so that the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal can be slotted without erroneous frequency conversion. Change alternately every time.

  Therefore, the radio transmission / reception apparatus according to the present embodiment is compatible with simultaneous transmission / reception, and degradation of transmission / reception characteristics due to the use of a transient local transmission signal for frequency conversion when changing the frequency of the radio signal. And the complication of the configuration can be prevented.

  Note that, as described above, the radio transmission / reception apparatus according to the present embodiment can cope with a case where simultaneous transmission / reception is not performed.

  Next, another embodiment of the present invention will be described with reference to the drawings.

<Second Embodiment>
FIG. 5 is a configuration diagram of a radio transmission / reception apparatus according to the second embodiment of the present invention.

  With reference to the figure, this radio | wireless transmission / reception apparatus is provided with the switching part 62 instead of the switching part 60 with respect to the radio | wireless transmission / reception apparatus which concerns on 1st Embodiment. Note that the modulation unit 1, the amplification unit 2, the band pass filter 3, the amplification unit 4, the circulator 5, the antenna 6, the amplification unit 7, the band pass filter 8, the demodulation unit 9, and the control unit 53. Although not shown, the configuration of each of these blocks is the same as that of the wireless transmission / reception apparatus according to the first embodiment shown in FIG.

  The switching unit 62 includes a switch SW11, a switch SW12, a switch SW13, and a distributor 11. The switch SW11 includes terminals te1 to te3. Switch SW12 includes terminals tf1 to tf3. The switch SW13 includes terminals tg1 to tg3.

  The distributor 11 is arranged at a branch point of a path from the terminal te2 to the transmission RF mixer M1 in the switch SW11 and a path from the terminal te2 to the terminal tg2 in the switch SW13 in the switch SW11, and prevents deterioration of the local transmission signal due to reflection or the like. .

  The terminal te1 in the switch SW11 is connected to the variable local oscillator L1, and the terminal te2 in the switch SW11 is connected to the input of the distributor. A variable local oscillator L2 is connected to a terminal tf1 in the switch SW12. The terminal te3 in the switch SW11 is connected to the terminal tf2 in the switch SW12. The terminal tg1 in the switch SW13 is connected to the terminal tf3 in the switch SW12. The first output of the distributor 11 is connected to the terminal tg2 of the switch SW13. Reception RF mixer M2 is connected to terminal tg3 of switch SW13. A second output of the distributor 11 is connected to the transmission RF mixer M1.

  Other configurations and basic operations are the same as those of the wireless transmission / reception apparatus according to the first embodiment.

[Operation]
Next, the operation when the radio transmission / reception apparatus according to the present embodiment switches the frequency of the carrier wave of the transmission signal and the reception signal will be described.

  In the following description, it is first assumed that the variable local oscillator L1 outputs a local transmission signal having the frequency f1, and the variable local oscillator L2 outputs a local transmission signal having the frequency f5.

  FIG. 6 is a configuration diagram of the wireless transmission / reception device showing the conduction state of each switch when the wireless transmission / reception device according to the present embodiment performs simultaneous transmission / reception.

  When performing simultaneous transmission / reception, the control unit 53 conducts between the terminal te1 and the terminal te2 in the switch SW11, conducts between the terminal tf1 and the terminal tf3 in the switch SW12, and in the switch SW13. Control to conduct between the terminal tg1 and the terminal tg3 is performed. As a result, a local transmission signal having the frequency f1 is output to the transmission RF mixer M1, and a local transmission signal having the frequency f5 is output to the reception RF mixer M2. Therefore, a transmission signal having a carrier frequency f1 can be transmitted, and a reception signal having a carrier frequency f5 can be received. That is, the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal in each slot in one frame when the radio transmission / reception apparatus according to the present embodiment performs simultaneous transmission and reception are as shown in FIG.

  With such a configuration, one of the local transmission signal output from the variable local transmitter L1 and the local transmission signal output from the variable local transmitter L2 is output to the transmission RF mixer M1, and at the same time, the other local transmission signal is output. The signal can be output to the reception RF mixer M2.

  FIG. 8 is a configuration diagram of the wireless transmission / reception device showing an example of the conduction state of each switch when the wireless transmission / reception device according to the present embodiment does not perform simultaneous transmission / reception.

  When transmitting the transmission signal with the carrier frequency f1 when the simultaneous transmission / reception is not performed, the control unit 53 conducts the connection between the terminal te1 and the terminal te2 in the switch SW11 and the terminal tg1 in the switch SW13. And the terminal tg3 are controlled to conduct. As a result, a local transmission signal having the frequency f1 is output to the transmission RF mixer M1.

  In this case, the state of the switch SW12 may be conducted between the terminal tf1 and the terminal tf2, or may be conducted between the terminal tf1 and the terminal tf3.

  FIG. 9 is a configuration diagram of the wireless transmission / reception device showing an example of the conduction state of each switch when the wireless transmission / reception device according to the present embodiment does not perform simultaneous transmission / reception.

  When the control unit 53 does not perform simultaneous transmission and reception and transmits a transmission signal whose carrier frequency is f5, the control unit 53 conducts between the terminal te2 and the terminal te3 in the switch SW11 and the terminal tf1 in the switch SW12. And the terminal tf2 are controlled to be conductive, and the switch SW13 is controlled to be conductive between the terminals tg1 and tg3. As a result, a local transmission signal having the frequency f5 is output to the transmission RF mixer M1.

  FIG. 10 is a configuration diagram of the wireless transmission / reception device showing an example of the conduction state of each switch when the wireless transmission / reception device according to the present embodiment does not perform simultaneous transmission / reception.

  When the control unit 53 does not perform simultaneous transmission and reception and receives a reception signal whose carrier frequency is f1, the control unit 53 conducts between the terminal te1 and the terminal te2 in the switch SW11 and the terminal tg2 in the switch SW13. And the terminal tg3 are controlled to conduct. As a result, a local transmission signal having the frequency f1 is output to the reception RF mixer M2.

  In this case, the state of the switch SW12 may be conducted between the terminal tf1 and the terminal tf2, or may be conducted between the terminal tf1 and the terminal tf3.

  FIG. 11 is a configuration diagram of the wireless transmission / reception device showing an example of the conduction state of each switch when the wireless transmission / reception device according to the present embodiment does not perform simultaneous transmission / reception.

  When the control unit 53 does not perform simultaneous transmission and reception and receives a reception signal whose carrier frequency is f5, the control unit 53 conducts between the terminal tf1 and the terminal tf3 in the switch SW12, and the terminal tg1 in the switch SW13. And the terminal tg3 are controlled to conduct. As a result, a local transmission signal having frequency f5 is output to reception RF mixer M2.

  In this case, the state of the switch SW11 may be conducted between the terminal te1 and the terminal te2, or may be conducted between the terminal te1 and the terminal te3.

  Therefore, the radio transmission / reception apparatus according to the embodiment of the present invention can support simultaneous transmission / reception and can prevent the configuration from being complicated, similarly to the radio transmission / reception apparatus according to the first embodiment.

  And the control part 53 in the radio | wireless transmission / reception apparatus which concerns on this Embodiment needs to change the frequency of the carrier wave of a transmission signal or a reception signal to a new frequency similarly to the radio | wireless transmission / reception apparatus which concerns on 1st Embodiment. In some cases, the transmission unit 51 stops transmission of the transmission signal or the reception unit 52 stops reception of the reception signal, and the frequency of the local transmission signal output from the variable local transmitter L1 or the variable local transmitter L2 Control to change.

  With such a configuration, transmission and reception in simultaneous transmission and reception are prevented while preventing deterioration in transmission and reception characteristics due to the use of the local transmission signal in a transient state for frequency conversion in the wireless transmission and reception device until the frequency of the local transmission signal is stabilized. Two or more types of carrier frequencies can be selected for each signal and received signal.

  Therefore, the radio transmission / reception apparatus according to the present embodiment is compatible with simultaneous transmission / reception, and degradation of transmission / reception characteristics due to the use of a transient local transmission signal for frequency conversion when changing the frequency of the radio signal. And the complication of the configuration can be prevented.

  Furthermore, in the wireless transmission / reception apparatus according to the first embodiment, there is a junction or branch point in the path from the variable local oscillator to the RF mixer, in order to reduce deterioration of the transmission signal and the reception signal due to the influence of reflection or the like. It was necessary to arrange a plurality of synthesizers or distributors. However, in the wireless transmission / reception apparatus according to the present embodiment, there is no junction or branch point in the path from variable local oscillator L2 to reception RF mixer M2 both in the case where simultaneous transmission / reception is performed and in the case where simultaneous transmission / reception is not performed. Since it can be a path, only one distributor needs to be arranged. Accordingly, it is possible to reduce deterioration of the transmission signal and the reception signal due to the influence of reflection or the like without complicating the configuration.

  Next, another embodiment of the present invention will be described with reference to the drawings.

<Third Embodiment>
FIG. 12 is a configuration diagram of a radio transmission / reception apparatus according to the third embodiment of the present invention.

  With reference to the figure, this radio | wireless transmission / reception apparatus is provided with the switching part 63 instead of the switching part 60 with respect to the radio | wireless transmission / reception apparatus which concerns on 1st Embodiment. Note that the modulation unit 1, the amplification unit 2, the band pass filter 3, the amplification unit 4, the circulator 5, the antenna 6, the amplification unit 7, the band pass filter 8, the demodulation unit 9, and the control unit 53. Although not shown, the configuration of each of these blocks is the same as that of the wireless transmission / reception apparatus according to the first embodiment shown in FIG.

  The switching unit 63 includes switches SW21 to SW24. Switch SW21 includes terminals th1 to th3. The switch SW22 includes terminals ti1 to ti3. The switch SW23 includes terminals tj1 to tj3. Switch SW24 includes terminals tk1 to tk3.

  A variable local oscillator L1 is connected to a terminal th1 of the switch SW21. The terminal ti1 in the switch SW22 is connected to the terminal th2 in the switch SW21. The terminal tk1 of the switch SW24 is connected to the terminal th3 of the switch SW21. A transmission RF mixer M1 is connected to a terminal ti2 in the switch SW22. A variable local oscillator L2 is connected to a terminal tj1 in the switch SW23. The terminal ti3 in the switch SW22 is connected to the terminal tj2 in the switch SW23. Reception RF mixer M2 is connected to terminal tk2 of switch SW24. The terminal tj3 in the switch SW23 is connected to the terminal tk3 in the switch SW24.

  Other configurations and basic operations are the same as those of the wireless transmission / reception apparatus according to the first embodiment.

[Operation]
Next, the operation when the radio transmission / reception apparatus according to the present embodiment switches the frequency of the carrier wave of the transmission signal and the reception signal will be described.

  In the following description, it is first assumed that the variable local oscillator L1 outputs a local transmission signal having the frequency f1, and the variable local oscillator L2 outputs a local transmission signal having the frequency f5.

  FIG. 13 is a configuration diagram of the wireless transmission / reception device showing an example of the conduction state of each switch when the wireless transmission / reception device according to the present embodiment performs simultaneous transmission / reception.

  When performing simultaneous transmission and reception, the control unit 53 conducts between the terminal th1 and the terminal th2 in the switch SW21, conducts between the terminal ti1 and the terminal ti2 in the switch SW22, and in the switch SW23. Control is performed such that the terminal tj1 and the terminal tj3 are electrically connected and the terminal tk2 and the terminal tk3 of the switch SW24 are electrically connected. As a result, a local transmission signal having the frequency f1 is output to the transmission RF mixer M1, and a local transmission signal having the frequency f5 is output to the reception RF mixer M2. Therefore, a transmission signal having a carrier frequency f1 can be transmitted, and a reception signal having a carrier frequency f5 can be received.

  FIG. 14 is a configuration diagram of a wireless transmission / reception device showing an example of a conduction state of each switch when the wireless transmission / reception device according to the present embodiment performs simultaneous transmission / reception.

  When performing simultaneous transmission and reception, the control unit 53 conducts between the terminal th1 and the terminal th3 in the switch SW21, conducts between the terminal ti2 and the terminal ti3 in the switch SW22, and in the switch SW23. Control is performed such that the terminal tj1 and the terminal tj2 are electrically connected and the terminal tk1 and the terminal tk2 of the switch SW24 are electrically connected. As a result, a local transmission signal having the frequency f5 is output to the transmission RF mixer M1, and a local transmission signal having the frequency f1 is output to the reception RF mixer M2. Therefore, a transmission signal having a carrier frequency f5 can be transmitted, and a reception signal having a carrier frequency f1 can be received.

  With such a configuration, one of the local transmission signal output from the variable local transmitter L1 and the local transmission signal output from the variable local transmitter L2 is output to the transmission RF mixer M1, and at the same time, the other local transmission signal is output. The signal can be output to the reception RF mixer M2.

  Further, the control unit 53 switches the conduction states of the switches SW21 to SW24 shown in FIGS. 13 and 14 for each slot, so that the frequency of the carrier wave of the transmission signal and the carrier wave of the reception signal are not erroneously converted. Can be alternately changed for each slot. Therefore, similarly to the wireless transmission / reception apparatus according to the first embodiment, the wireless transmission / reception apparatus according to the present embodiment switches between the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal as shown in FIG. Can be done. That is, it is possible to communicate with a plurality of wireless transmission / reception devices having different carrier frequencies of wireless signals in temporally continuous slots.

  Next, the operation of the control unit 53 when the wireless transmission / reception apparatus according to the present embodiment does not perform simultaneous transmission / reception will be described.

  When the transmission unit 53 does not perform simultaneous transmission and reception and transmits a transmission signal whose carrier frequency is f1, the control unit 53 conducts between the terminal th1 and the terminal th2 in the switch SW21 and the terminal ti1 in the switch SW22. And the terminal ti2 are controlled to conduct. As a result, a local transmission signal having the frequency f1 is output to the transmission RF mixer M1.

  In this case, the state of the switch SW23 may be conducted between the terminal tj1 and the terminal tj2, or may be conducted between the terminal tj1 and the terminal tj3. In addition, the state of the switch SW24 may be conducted between the terminal tk1 and the terminal tk2, or may be conducted between the terminal tk1 and the terminal tk3.

  When transmitting a transmission signal in which the frequency of the carrier wave is f5 in the case where simultaneous transmission / reception is not performed, the control unit 53 conducts between the terminal ti2 and the terminal ti3 in the switch SW22 and the terminal tj1 in the switch SW23. And the terminal tj2 are controlled to conduct. As a result, a local transmission signal having the frequency f5 is output to the transmission RF mixer M1.

  In this case, the state of the switch SW21 may be conducted between the terminal th1 and the terminal th2, or may be conducted between the terminal th1 and the terminal th3. In addition, the state of the switch SW24 may be conducted between the terminal tk1 and the terminal tk2, or may be conducted between the terminal tk1 and the terminal tk3.

  When the control unit 53 does not perform simultaneous transmission and reception and receives a reception signal whose carrier frequency is f1, the control unit 53 conducts between the terminal th1 and the terminal th3 in the switch SW21 and the terminal tk1 in the switch SW24. And the terminal tk2 are controlled to conduct. As a result, a local transmission signal having the frequency f1 is output to the reception RF mixer M2.

  In this case, the state of the switch SW22 may be conducted between the terminal ti1 and the terminal ti2, or may be conducted between the terminal ti1 and the terminal ti3. Further, the state of the switch SW23 may be conducted between the terminal tj1 and the terminal tj2, or may be conducted between the terminal tj1 and the terminal tj3.

  In addition, when the control unit 53 does not perform simultaneous transmission and reception and receives a reception signal whose carrier frequency is f5, the control unit 53 conducts between the terminal tj1 and the terminal tj3 in the switch SW23, and in the switch SW24. Control to conduct between the terminal tk2 and the terminal tk3 is performed. As a result, a local transmission signal having frequency f5 is output to reception RF mixer M2.

  In this case, the state of the switch SW21 may be conducted between the terminal th1 and the terminal th2, or may be conducted between the terminal th1 and the terminal th3. Further, the state of the switch SW22 may be conducted between the terminal ti1 and the terminal ti2, or may be conducted between the terminal ti1 and the terminal ti3.

  As described above, the radio transmission / reception apparatus according to the present embodiment is compatible with simultaneous transmission / reception, and is in a transient state when changing the frequency of the radio signal, like the radio transmission / reception apparatus according to the first embodiment. It is possible to prevent the deterioration of the transmission / reception characteristics due to the use of the transmission signal for frequency conversion and to prevent the configuration from becoming complicated.

  And the control part 53 in the radio | wireless transmission / reception apparatus which concerns on this Embodiment needs to change the frequency of the carrier wave of a transmission signal or a reception signal to a new frequency similarly to the radio | wireless transmission / reception apparatus which concerns on 1st Embodiment. In some cases, the transmission unit 51 stops transmission of the transmission signal or the reception unit 52 stops reception of the reception signal, and the frequency of the local transmission signal output from the variable local transmitter L1 or the variable local transmitter L2 Control to change.

  With such a configuration, transmission and reception in simultaneous transmission and reception are prevented while preventing deterioration in transmission and reception characteristics due to the use of the local transmission signal in a transient state for frequency conversion in the wireless transmission and reception device until the frequency of the local transmission signal is stabilized. Two or more types of carrier frequencies can be selected for each signal and received signal.

  Furthermore, in the wireless transmission / reception apparatus according to the first embodiment, there is a junction or branch point in the path from the variable local oscillator to the RF mixer, in order to reduce deterioration of the transmission signal and the reception signal due to the influence of reflection or the like. It was necessary to arrange a plurality of synthesizers or distributors. However, in the radio transmission / reception apparatus according to the present embodiment, transmission RF mixer M1 and reception RF mixer M2 from variable local oscillator L1 and variable local oscillator L2 both when simultaneous transmission and reception are not performed. Since it is possible to make all paths to the path without a junction or branch point, it is not necessary to arrange a synthesizer or a distributor. Accordingly, it is possible to reduce deterioration of the transmission signal and the reception signal due to the influence of reflection or the like without complicating the configuration.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a block diagram of the radio | wireless transmitter / receiver which concerns on the 1st Embodiment of this invention. It is a figure showing an example of the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal in each slot in one frame when the wireless transmission / reception apparatus according to the first embodiment of the present invention performs simultaneous transmission / reception. Each slot in one frame when the wireless transmission / reception apparatus according to the first embodiment of the present invention performs simultaneous transmission / reception and changes the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal to a new frequency FIG. 3 is a diagram illustrating an example of a carrier frequency of a transmission signal and a carrier frequency of a reception signal in FIG. It is a block diagram of the modification of the radio | wireless transmitter / receiver which concerns on the 1st Embodiment of this invention. It is a block diagram of the radio | wireless transmission / reception apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram of the radio | wireless transmission / reception apparatus showing the conduction | electrical_connection state of each switch in case the radio | wireless transmission / reception apparatus which concerns on the 2nd Embodiment of this invention performs simultaneous transmission / reception. It is a figure showing an example of the frequency of the carrier wave of the transmission signal and the frequency of the carrier wave of the reception signal in each slot in one frame when the wireless transmission / reception apparatus according to the second embodiment of the present invention performs simultaneous transmission / reception. It is a block diagram of the radio | wireless transmission / reception apparatus showing an example of the conduction | electrical_connection state of each switch when the radio | wireless transmission / reception apparatus which concerns on the 2nd Embodiment of this invention does not perform simultaneous transmission / reception. It is a block diagram of the radio | wireless transmission / reception apparatus showing an example of the conduction | electrical_connection state of each switch when the radio | wireless transmission / reception apparatus which concerns on the 2nd Embodiment of this invention does not perform simultaneous transmission / reception. It is a block diagram of the radio | wireless transmission / reception apparatus showing an example of the conduction | electrical_connection state of each switch when the radio | wireless transmission / reception apparatus which concerns on the 2nd Embodiment of this invention does not perform simultaneous transmission / reception. It is a block diagram of the radio | wireless transmission / reception apparatus showing an example of the conduction | electrical_connection state of each switch when the radio | wireless transmission / reception apparatus which concerns on the 2nd Embodiment of this invention does not perform simultaneous transmission / reception. It is a block diagram of the radio | wireless transmitter / receiver which concerns on the 3rd Embodiment of this invention. It is a block diagram of the radio | wireless transmission / reception apparatus showing an example of the conduction | electrical_connection state of each switch in case the radio | wireless transmission / reception apparatus which concerns on the 3rd Embodiment of this invention performs simultaneous transmission / reception. It is a block diagram of the radio | wireless transmission / reception apparatus showing an example of the conduction | electrical_connection state of each switch in case the radio | wireless transmission / reception apparatus which concerns on the 3rd Embodiment of this invention performs simultaneous transmission / reception.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Modulation part, 2, 4, 7 Amplification part, 3, 8 Band pass filter, 5 Circulator, 6 Antenna, 9 Demodulation part, L1, L2 Variable local oscillator, 51 Transmission part, 52 Reception part, 53 Control part, 60 To 63 switching unit, M1 transmission RF mixer, M2 reception RF mixer, SW1 to SW4, SW11, SW12, SW21, SW22 switch, ta1 to ta3, tb1 to tb3, tc1 to tc3, td1 to td3, te1 to te3, tf1 to tf1 tf3, tg1 to tg3, th1 to th3, ti1 to ti3, tj1 to tj3, tk1 to tk3 terminals.

Claims (7)

A wireless transmission / reception device capable of simultaneous transmission / reception that performs transmission and reception simultaneously,
A first local oscillator for generating a first local transmission signal;
A second local oscillator for generating a second local transmission signal having a frequency different from that of the first local transmission signal;
A transmission RF mixer that frequency-converts a baseband signal or an IF signal into a transmission signal using the first local transmission signal or the second local transmission signal;
A transmitter for transmitting the transmission signal;
A receiving unit for receiving a received signal;
A reception RF mixer for frequency-converting the received signal to a baseband signal or an IF signal using the first local transmission signal or the second local transmission signal;
A switching unit that outputs the first local transmission signal to the transmission RF mixer or the reception RF mixer and outputs the second local transmission signal to the transmission RF mixer or the reception RF mixer;
When performing the simultaneous transmission and reception, the switching unit outputs either one of the first local transmission signal and the second local transmission signal to the transmission RF mixer, and simultaneously transmits the other local transmission signal. A wireless transmission / reception apparatus comprising: a control unit that performs control to output to the reception RF mixer. The switching unit is
A first switch, a second switch, a third switch, and a distributor;
The first switch, the second switch, and the third switch each include a first terminal, a second terminal, and a third terminal;
A first terminal of the first switch is connected to the first local oscillator, a second terminal of the first switch is connected to an input of the distributor,
The second local oscillator is connected to a first terminal of the second switch, a third terminal of the first switch is connected to a second terminal of the second switch, and the second terminal A first terminal of the third switch is connected to a third terminal of the switch;
A first output of the distributor is connected to a second terminal of the third switch, and the reception RF mixer is connected to a third terminal of the third switch;
A second output of the distributor is connected to the transmit RF mixer;
When the simultaneous transmission and reception are performed, the control unit conducts between the first terminal and the second terminal in the first switch, and the first switch in the second switch. 2. The radio transmission / reception apparatus according to claim 1, wherein control is performed to conduct between the terminal and the third terminal and to conduct between the first terminal and the third terminal in the third switch. .   When the control unit does not perform the simultaneous transmission and reception and transmits the transmission signal, the control unit conducts between the first terminal and the second terminal in the first switch, and Control to conduct between the first terminal and the third terminal in the third switch, or between the second terminal and the third terminal in the first switch And conducting between the first terminal and the second terminal in the second switch, and between the first terminal and the third terminal in the third switch. When the reception signal is received when the simultaneous transmission / reception is not performed, the electrical connection between the first terminal and the second terminal in the first switch is performed. And said first The second switch and the third terminal in the switch are controlled to conduct, or the first terminal and the third terminal in the second switch are conducted. And the radio | wireless transmitter / receiver of Claim 2 which performs control which conducts between the said 1st terminal in the said 3rd switch, and the said 3rd terminal. The switching unit is
Including a first switch, a second switch, a third switch, and a fourth switch;
The first switch, the second switch, and the third switch each include a first terminal, a second terminal, and a third terminal;
The first local oscillator is connected to a first terminal of the first switch, a first terminal of the second switch is connected to a second terminal of the first switch, and the first terminal is connected to the first terminal. A first terminal of the fourth switch is connected to a third terminal of the switch;
The transmission RF mixer is connected to a second terminal of the second switch;
The second local oscillator is connected to the first terminal of the third switch, the third terminal of the second switch is connected to the second terminal of the third switch,
The reception RF mixer is connected to a second terminal of the fourth switch, a third terminal of the fourth switch is connected to a third terminal of the third switch,
When the simultaneous transmission and reception are performed, the control unit conducts between the first terminal and the second terminal in the first switch, and the first switch in the second switch. A terminal is connected between the second terminal and the third switch is connected between the first terminal and the third terminal, and the fourth switch is connected with the second terminal. Control to conduct between the second terminal and the third terminal, or conduct between the first terminal and the third terminal in the first switch, and And conducting between the second terminal and the third terminal in the second switch, and conducting between the first terminal and the second terminal in the third switch, and The first terminal of the fourth switch; Serial radio transceiver of claim 1, wherein performing the control to conduct between the second terminal.   When the control unit does not perform the simultaneous transmission and reception and transmits the transmission signal, the control unit conducts between the first terminal and the second terminal in the first switch, and Control to conduct between the first terminal and the second terminal in the second switch, or between the second terminal and the third terminal in the second switch When conducting the control and conducting the conduction between the first terminal and the second terminal in the third switch and not performing the simultaneous transmission / reception and receiving the reception signal, Control for conducting between the first terminal and the third terminal in the third switch and conducting between the second terminal and the third terminal in the fourth switch Do Or between the first terminal and the third terminal of the first switch, and between the first terminal and the second terminal of the fourth switch. The wireless transmission / reception apparatus according to claim 4, wherein control for conducting is performed. The wireless transmission / reception device further includes:
A local transmission signal that controls the first local transmitter or the second local transmitter corresponding to the transmission signal to change the frequency of the first local transmission signal or the frequency of the second local transmission signal. A control unit;
The radio transmission / reception according to claim 1, further comprising: a transmission control unit configured to control the transmission unit to stop transmission of the transmission signal generated by the transmission RF mixer using a local transmission signal whose frequency is changed. apparatus. The wireless transmission / reception device further includes:
A local transmission signal that controls the first local transmitter or the second local transmitter corresponding to the received signal to change the frequency of the first local transmission signal or the frequency of the second local transmission signal. A control unit;
2. The radio according to claim 1, further comprising: a reception control unit that controls the reception unit to stop reception of the reception signal that is frequency-converted by the reception RF mixer by using the local transmission signal whose frequency is changed. Transmitter / receiver.

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