JP2010109546A - Radio equipment and control method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide radio equipment capable of diagnosing a present apparatus in the state of continuing an operation without enlarging the scale of the apparatus, and its control method. <P>SOLUTION: The radio equipment (100) with a self diagnosing function, which is provided with an antenna (ANT) for transmitting and receiving signals and a demultiplexer (DUP) for separating the transmission route (120) of transmission signals and the reception route (130) of reception signals, includes: a distribution part (140) for distributing the transmission signals from the transmission route (120) in the prestage of the demultiplexer (DUP); a phase shifter (150) for adjusting the phase of the transmission signals distributed in the distribution part (140); a connection part (160) for connecting the transmission signals whose phase is adjusted in the phase shifter (150) to the reception route (130) in the poststage of the demultiplexer (DUP); and a control part (114) for controlling the phase shifter (150) so as to turn the phase of the transmission signals distributed in the distribution part (140) to the same phase as the phase of the transmission signals which flow into the reception route (130) through the demultiplexer (DUP). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a radio and a control method thereof, and more particularly, a radio having a self-diagnosis function and a control method thereof capable of diagnosing whether or not the radio is operating normally without stopping operation of the radio. About.

  In a wireless communication system, a communication carrier needs to periodically inspect and inspect a base station in order to detect a malfunction such as a failure at an early stage and provide a high-quality service. In order to make this maintenance and inspection easier, the base station is often provided with a self-diagnosis function for diagnosing whether the own apparatus is operating normally (for example, Patent Document 1). reference). In general, for self-diagnosis, diagnosis of the reception path using leakage of the transmission signal transmitted by the own device to the reception path, and reception of a signal transmitted from the pseudo terminal by incorporating a pseudo terminal in the base station It includes the diagnosis of the reception path.

  Here, a base station having a self-diagnosis function when the communication method according to the prior art is an FDD (Frequency Division Duplex) method will be briefly described. FIG. 7 is a schematic block diagram of a base station having a self-diagnosis function in the case of the FDD scheme. In the FDD system, since the frequencies of the transmission signal and the reception signal are different, a method of installing a pseudo terminal in the base station is used. As shown in FIG. 7, the base station 200 includes a baseband unit 210, a transmission system 220, a duplexer (demultiplexer) DUP2, a reception system 230, a pseudo terminal 300, a coupler CUP, and an antenna ANT as main components. The transmission system 220 includes a digital up converter (DUC) 221, a digital / analog converter (DAC) 222, an up converter 223, a band pass filter 224, and a power amplifier 225. The reception system 230 includes a low noise amplifier 235, a band-pass filter 234, a down converter 233, an analog / digital converter (ADC) 232, and a digital down converter (DDC) 231. Further, a local oscillator LO and a PLL 226 that are shared by the transmission system 220 and the reception system 230 are provided. During normal operation without performing self-diagnosis, communication with a wireless communication terminal (mobile station) is performed with the above-described configuration. That is, the transmission signal is modulated in the baseband unit 210, and the modulated signal is converted into a desired frequency by the DUC 221. The DAC 222 converts the digital signal from the DUC 221 into an analog signal. The signal processing so far is performed in the intermediate frequency band (IF band), but the IF signal is converted into a radio frequency signal (RF signal) by the up-converter 223. The local oscillator LO generates a signal for converting the transmission signal into a necessary RF signal, and the generated signal is synchronized with the frequency and phase of the PLL 226 and the reference signal source, and then uploaded. It is supplied to the converter 223. The band pass filter 224 removes unnecessary spurious components generated by the up converter 223. Thereafter, the transmission signal is amplified to a required output power by the power amplifier 225 and transmitted from the antenna ANT.

  Also, the received signal received by the antenna ANT is amplified by the low noise amplifier 235, and unnecessary spurious components are removed by the band pass filter 234. Thereafter, the received signal in the RF band is converted into an IF signal by the local oscillator LO, the PLL 226, and the down converter 233. The reception signal in the IF band is converted into a digital signal by the ADC 232 and further converted into a desired frequency by the DDC 231. Thereafter, the received signal is transmitted to the baseband unit 210 and demodulated by the baseband unit 210.

  The pseudo terminal 300 operates in the same manner as a wireless communication terminal, and has the same configuration as the above-described block in the base station 200. At the time of self-diagnosis, the signal transmitted from the pseudo terminal 300 is distributed by the coupler CUP and output to the reception system 230 as a reception signal. By comparing the behavior of the reception system 230 with respect to this received signal (reception electric field strength, modulation accuracy, etc.) with the behavior measured in advance at the time of initial adjustment at the time of shipment, it is determined whether or not the base station 200 is operating normally. judge.

JP 2008-118243 A

  As described above, in the FDD scheme, the frequency of the transmission signal and that of the reception signal are different, and thus the use of the pseudo terminal as described above is considered. However, if a pseudo terminal is used, it becomes a large-scale configuration as a base station, and the cost increases accordingly. In order to perform self-diagnosis, operation as a normal base station that communicates with a wireless communication terminal must be stopped, which is not efficient.

  Therefore, an object of the present invention is to provide a technique (a radio device and a control method thereof) that can overcome the above-described problems and can diagnose the device itself while continuing operation without increasing the size of the device. There is to do.

In order to solve the above-described problems, a wireless device having a self-diagnosis function according to the present invention is as follows.
An antenna for transmitting and receiving signals;
A duplexer that separates a transmission path of a transmission signal transmitted from the antenna and a reception path of a reception signal received by the antenna;
A radio having a self-diagnosis function,
A distribution unit that distributes a transmission signal from the transmission path in a front stage of the duplexer;
A phase shifter for adjusting the phase of the transmission signal distributed by the distribution unit;
A coupling unit that couples a transmission signal, the phase of which is adjusted by the phase shifter, to the reception path at a subsequent stage of the duplexer;
At the time of self-diagnosis, the phase shifter is set so that the phase of the transmission signal distributed by the distribution unit is the same as the phase of the transmission signal that has flowed (leaked) into the reception path via the duplexer. A control unit to control;
(A transmission signal that has flowed (leaked) into the reception path via the duplexer and a transmission signal that has been distributed by the distribution unit that has the same phase as the flow of the transmitted signal on the reception path) And a storage unit for storing reference values measured in advance during initial adjustment (when shipped)
(A determination unit that performs a self-diagnosis by comparing a transmission signal output from the coupling unit on the reception path with a reference value).

In addition, a wireless device having a self-diagnosis function according to an embodiment of the present invention,
The controller is
If it is not during self-diagnosis, the phase shifter is controlled so that the phase of the transmission signal distributed by the distribution unit is opposite to the phase of the transmission signal that has flowed into the reception path through the duplexer. It is characterized by that.

Furthermore, a radio having a self-diagnosis function according to another embodiment of the present invention includes:
A first filter that passes a reception signal received by the antenna and a second filter that passes a transmission signal distributed from the distribution unit are further provided on the reception path.

  As described above, the solution of the present invention has been described as an apparatus. However, the present invention can be realized as a method, a program, and a storage medium that stores the program substantially corresponding to these, and the scope of the present invention. It should be understood that these are also included. Note that each step of the method and program uses an arithmetic processing unit such as a CPU or DSP as necessary in data processing, and the input data, processed / generated data, etc. are stored in HDD, memory, etc. Is stored in the storage device.

For example, a method of controlling a radio having a self-diagnosis function that implements the present invention as a method is as follows:
Transmitting and receiving signals with an antenna;
A method of controlling a radio having a self-diagnostic function, including a step of separating a transmission path of a transmission signal transmitted from the antenna by a duplexer and a reception path of a reception signal received by the antenna,
Distributing a transmission signal from the transmission path in a front stage of the duplexer;
Adjusting the phase of the transmission signal distributed in the distributing step with a phase shifter;
Coupling the transmission signal, the phase of which has been adjusted in the adjusting step, to the reception path at a coupling unit subsequent to the duplexer;
At the time of self-diagnosis, controlling the phase shifter so that the phase of the transmission signal distributed in the distributing step is the same as the phase of the transmission signal flowing into the reception path via the duplexer; ,
(The step of performing a self-diagnosis by comparing an output signal output from the coupling unit on the reception path with a reference value).

  ADVANTAGE OF THE INVENTION According to this invention, the radio | wireless machine which can diagnose the own apparatus in the state which continued normal operation, without enlarging the scale of an apparatus, and its control method are provided.

  Hereinafter, embodiments of a radio according to the present invention will be described in detail with reference to the drawings. In the following description, a base station will be described as an example of a wireless device. However, the present invention is not limited to this, and a mobile terminal device such as a mobile phone or a PDA (personal digital assistance) can also be used.

<First embodiment>
FIG. 1 is a schematic block diagram of a base station according to a first embodiment of the present invention. As shown in FIG. 1, the base station 100 mainly includes a baseband unit 110, a transmission system 120, a duplexer (demultiplexer) DUP, a reception system 130, a distribution unit 140, a phase shifter 150, a coupling unit 160, and an antenna ANT. As a major component. The baseband unit 110 further includes a determination unit 112, a control unit 114, and a storage unit 116. The transmission system 120 includes a digital up converter (DUC) 121, a digital / analog converter (DAC) 122, an up converter 123, a band pass filter 124 and a power amplifier 125. The reception system 130 includes a low noise amplifier 135, a band-pass filter 134, a down converter 133, an analog / digital converter (ADC) 132, and a digital down converter (DDC) 131. Further, a local oscillator LO and a PLL 170 shared by the transmission system 120 and the reception system 130 are provided. Moreover, the base station 100 transmits and receives signals by sharing the antenna ANT. The functions of the transmission system 120, the reception system 130, the local oscillator LO, the PLL 170, and the duplexer (demultiplexer) DUP are the same as those of the conventional base station 200 shown in FIG.

  The duplexer DUP has a function of separating the transmission path of the transmission signal and the reception path of the reception signal, but the transmission signal having a large power amplified by the power amplifier 125 leaks into the reception path through the duplexer DUP. It will flow into the receiving path. The present invention is characterized in that this transmission signal leakage is positively utilized when performing self-diagnosis. Therefore, unlike the prior art, the present invention further includes a distributor 140, a phase shifter 150, and a coupler 160. Distribution unit 140 is coupled between power amplifier 125 and duplexer DUP in transmission system 120, and distributes a transmission signal on the transmission path from the transmission path in a preceding stage of duplexer DUP. The distribution unit 140 may be a general directional coupler, and can be realized by a simple microstrip line, for example. The phase shifter 150 is coupled to the distribution unit 140 and adjusts the phase of the transmission signal distributed from the distribution unit 140. The coupling unit 160 is coupled between the duplexer DUP and the low-noise amplifier 135 of the reception system 130, and couples the transmission signal output from the phase shifter 150 to the reception path after the duplexer DUP. Similarly to the distribution unit 140, the coupling unit 160 can also be realized by a simple microstrip line.

  As described above, the distribution unit 140 and the combining unit 160 can combine the transmission signal with the reception path. The transmission signal combined on the reception path is hereinafter referred to as a “distributed signal”, and the transmission signal leaking into the reception path through the duplexer DUP is referred to as a “leakage signal”. At the time of self-diagnosis, the reception system can be diagnosed by monitoring the distribution signal at the diagnosis part of the reception system. That is, the electric field strength of the distribution signal measured in advance at the time of initial adjustment at the time of shipment is stored in the storage unit 116 as a reference value, and the reference value and the distribution signal are compared by the determination unit 112, whereby the base station 100 It can be determined whether there is any abnormality.

  Unlike the prior art, in the present invention, the phase shifter 150 is controlled by the control unit 114 so that the phase of the distribution signal and the phase of the leakage signal are the same during self-diagnosis. That is, the distribution signal and the leakage signal are added together to increase the electric field strength of the distribution signal flowing through the receiving system 130, thereby facilitating measurement of the distribution signal during self-diagnosis. On the other hand, when normal communication is performed with a wireless communication terminal (during normal operation) instead of during self-diagnosis, leakage of the transmission signal to the reception path is caused by deterioration of the reception system or accuracy of the reception signal. It is not preferable because it affects Therefore, during normal operation, the phase shifter 150 is controlled by the control unit 114 so that the phase of the distribution signal and the phase of the leakage signal are opposite to each other. That is, control is performed such that unnecessary signals do not flow on the reception path so that the leakage signal and the distribution signal cancel each other. This will be described with reference to the drawings. FIG. 5 is a graph showing a signal waveform of a distributed signal observed between the coupling unit 160 and the low noise amplifier 135, for example. In the graph, the solid line DP indicates the self-diagnosis, that is, when the distribution signal phase and the leakage signal phase are controlled to be the same phase, the broken line TP indicates the normal operation, that is, the distribution signal phase and leakage. The signal waveform when it is controlled so that the phase of the error signal is in the opposite phase is shown. As shown in the figure, the amplitude of the distribution signal increases during self-diagnosis, so that the distribution signal can be easily detected on the reception path. In order to ensure that the distribution signal and the leakage signal cancel each other, an attenuator that operates during normal operation may be provided between the distribution unit 140 and the coupling unit 160. The power of the distribution signal may be adjusted by adjusting the coupling coefficient of the signal by adjusting the microstrip line pattern of the coupling unit 160.

  Next, a control method of the base station 100 according to the first embodiment of the present invention will be described using the flowchart of FIG. First, the control unit 114 determines whether or not there is a request for self-diagnosis (step S11). The request for self-diagnosis is made, for example, by a communication carrier that performs maintenance management of the base station 100. When there is no request for self-diagnosis, the control unit 114 controls the phase shifter 150 to transmit the phase of the transmission signal distributed from the distribution unit 140 and the phase of the transmission signal leaked into the reception path through the duplexer DUP. Are set to have opposite phases (step S12). When there is a request for self-diagnosis, the control unit 114 controls the phase shifter 150 to transmit the phase of the transmission signal distributed from the distribution unit 140 and the phase of the transmission signal leaked into the reception path via the duplexer DUP. Are set to have the same phase (step S13). Thereafter, the determination unit 112 compares the electric field strength of the distribution signal on the reception path with the electric field strength of the reference value stored in the storage unit 116 (step S14). If the determination unit 112 determines that there is an abnormality, the fact that the abnormality has occurred is displayed on, for example, a monitor (not shown) or an alarm sound is generated (steps S15 and S17). . The determination of whether or not it is abnormal corresponds to the case where the difference between the electric field strength of the distribution signal and the reference value is greater than or equal to a predetermined threshold, or the case where the electric field strength of the distribution signal varies greatly with time. If the determination unit 112 determines that there is no abnormality, it reports that it is normal and continues normal operation (steps S15 and S16).

  In the present invention, as described above, since a self-diagnosis is performed using a part of the transmission signal distributed and coupled to the reception path, it is necessary to incorporate a pseudo terminal as in the prior art in the base station. There is an advantage that the base station is not enlarged. Furthermore, since the distribution unit 140 and the coupling unit 160 can be realized by a simple microstrip line, there is no cost.

<Second embodiment>
Next, a base station according to the second embodiment of the present invention is described. FIG. 3 is a schematic block diagram of a base station 100A according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the structure part which has the function similar to the base station 100 of 1st Example shown in FIG. 1, and description is abbreviate | omitted. The base station 100A further includes a digital down converter (DDC2) 131B, an analog / digital converter (ADC2) 132B, and a distributor 136. The distributor 136 configures only the reception path from the coupling unit 160 to the digital down converter (DDC) 131A during normal operation, but at the time of self-diagnosis, the digital down converter (DDC2) 131B and the analog / digital converter (ADC2). ) 132B is further coupled to the receive path. As described above, in the FDD communication method, during self-diagnosis, transmission signals (distributed signals) and reception signals having different frequencies are mixed and flow on the reception path. Therefore, the reception path is divided into two, and a filter corresponding to the frequency of the transmission signal and the reception signal is provided in each path to separate the transmission signal (distributed signal) and the reception signal.

  In the example of FIG. 3, only the transmission signal (distributed signal) passes through the path from the distributor 136 to the digital down converter (DDC2) 131B and the analog / digital converter (ADC2) 132B, for example, before or after the ADC2 132B. A filter is provided. Further, on the path from the distributor 136 to the digital down converter (DDC) 131A and the analog / digital converter (ADC) 132A, for example, a filter that allows only the received signal to pass is provided before or after the ADC 132A. The determination unit 112A compares the electric field strength of the transmission signal (distributed signal) with a reference value measured in advance, and performs abnormality determination. Note that the difference between the base stations 100 and 100A shown in FIGS. 1 and 3 is only the distributor, the DDC, and the ADC, and thus the description of the other components in FIG. 3 is omitted.

  The above concept will be described with reference to the drawings. FIG. 6 is a schematic graph showing frequency characteristics of a transmission signal (distributed signal) and a received signal detected when sampling is performed by the ADC (132A, 132B). As shown in the figure, a transmission signal (distributed signal, transmission wave) and a reception signal (reception wave) are detected together. In the figure, the frequency characteristic of the received signal (received wave) is a solid line RP, and among the transmission signals (distributed signal, transmitted wave), the frequency characteristic during self-diagnosis is a solid line DP, and the frequency characteristic during normal operation is a broken line TP. It is shown by. At the time of self-diagnosis, the phase shifter 150 is adjusted so that the phase of the distribution signal and the phase of the leakage signal are the same, so that the transmission signal (distribution during normal operation indicated by the broken line TP is distributed as shown in the figure. The power is larger than the signal. In the second embodiment, the received signal and the transmitted signal (distributed signal) shown in FIG. 6 can be respectively extracted by applying a filter. For example, when the received signal RP is extracted, a low-pass filter having a pass band indicated by a waveform FIL1 in FIG. 6 is used. On the other hand, when the transmission signal DP (or TP) is extracted, a low-pass filter having a pass band indicated by FIL2 in FIG. 6 is used. The filter can be realized by either a digital filter or an analog filter. When an analog filter is used, a filter corresponding to a reception signal or a transmission signal (distributed signal) is provided between the distributor 136 and the ADCs 132A and 132B in FIG. In the case of realizing with a digital filter, a filter corresponding to a reception signal or a transmission signal (distributed signal) is provided between the ADCs 132A and 132B and the DDCs 131A and 131B in FIG.

  Next, a control method of the base station 100A according to the second embodiment of the present invention will be described using the flowchart of FIG. First, the control unit 114 determines whether there is a request for self-diagnosis (step S21). The request for self-diagnosis is made, for example, from a communication carrier that performs maintenance management of the base station 100A. When there is no request for self-diagnosis, the control unit 114 controls the phase shifter 150 to transmit the phase of the transmission signal distributed from the distribution unit 140 and the phase of the transmission signal leaked into the reception path through the duplexer DUP. Are set to have opposite phases (step S22). When there is a request for self-diagnosis, the control unit 114 controls the phase shifter 150 to transmit the phase of the transmission signal distributed from the distribution unit 140 and the phase of the transmission signal leaked into the reception path via the duplexer DUP. Are set in phase with each other (step S23). Next, the control unit 114 controls the distributor 136 so as to form a path from the down converter 133 to the ADC2 132B, and operates the ADC2 132B and the DDC2 131B that operate in the band of the transmission signal (distributed signal) (step). S24). Thereafter, the determination unit 112A compares the electric field strength of the distribution signal on the reception path with the electric field strength of the reference value stored in the storage unit 116 (step S25). At this time, unlike the first embodiment in which the received signal and the transmission signal (distributed signal) are mixed, in the second embodiment, only the transmitted signal (distributed signal) can be extracted by the filter. Please note that. If the determination unit 112 determines that there is an abnormality, the fact that the abnormality has occurred is displayed on, for example, a monitor (not shown) or an alarm sound is generated (steps S26 and S29). . The determination of whether or not it is abnormal corresponds to the case where the difference between the electric field strength of the distribution signal and the reference value is greater than or equal to a predetermined threshold, or the case where the electric field strength of the distribution signal varies greatly with time. If the determination unit 112 determines that there is no abnormality, it reports normality, stops the ADC2 132B and DDC2 131B operating in the band of the transmission signal, and continues normal operation (step S26). ~ S28).

  As described above, according to the second embodiment, at the time of self-diagnosis, the reception signal and the transmission signal having different frequencies can be detected separately by using the filter. Therefore, more accurate self-diagnosis is possible.

  The effect of the present invention will be described again. According to the present invention, since self-diagnosis is performed using a part of the transmission signal distributed and coupled to the reception path, there is no need to incorporate a pseudo terminal as in the prior art in the base station. The station is not enlarged. Furthermore, since the distribution unit for extracting a part of the transmission signal and the coupling unit for coupling to the reception path can be realized by a simple microstrip line, there is no cost. In addition, since the control is performed so that the leakage signal and the distribution signal are canceled by the phase shifter, it is possible to minimize degradation of the reception system due to the transmission signal leaking into the reception path. Furthermore, since a received signal and a transmitted signal having different frequencies can be separately detected during self-diagnosis, more accurate self-diagnosis is possible. Therefore, self-diagnosis can be performed while continuing communication with an external wireless communication terminal.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each component, each step, etc. can be rearranged so that there is no logical contradiction, and multiple components, steps, etc. can be combined or divided into one It is. For example, in the above-described embodiments, the FDD system has been described. However, the present invention can also be applied to a TDD system having the same transmission / reception frequency. Further, a local oscillator and a PLL may be provided in each of the transmission system and the reception system. Although the figure shows a base station having only one antenna, the present invention is not limited to this, and the base station may include a plurality of antennas. Furthermore, the storage unit 116 may store not only the electric field intensity at the time of initial adjustment but also data obtained by demodulating (detecting) the transmission signal coupled to the reception path by the baseband unit 110. In this case, it is possible to diagnose the accuracy of detection.

1 is a schematic block diagram of a base station according to a first embodiment of the present invention. 3 is a flowchart of a control method of the base station 100 according to the first embodiment of the present invention. It is a schematic block diagram of base station 100A by 2nd Example of this invention. 5 is a flowchart of a control method of a base station 100A according to a second embodiment of the present invention. It is the graph which showed the amplitude of the distribution signal on the time axis. It is a typical graph which shows the frequency characteristic of a transmission signal (distribution signal) and a reception signal. It is a schematic block diagram of the base station apparatus which has a self-diagnosis function of a FDD system.

Explanation of symbols

100, 100A, 200 Base station 110, 210, 310 Baseband unit 112, 112A Judgment unit 114 Control unit 116 Storage unit 120, 220, 320 Transmission system 121, 221, 321 Digital up converter (DUC)
122, 222, 322 Digital / analog converter (DAC)
123, 223, 323 Up converter 124, 224, 324 Band pass filter 125, 225, 325 Power amplifier 130, 230, 330 Reception system 131, 231, 331 Digital down converter (DDC)
132,232,332 Analog / Digital Converter (ADC)
133, 233, 333 Down converter 134, 234, 334 Band-pass filter 135, 235, 335 Low noise amplifier 136 Distributor 140 Distributor 150 Phase shifter 160 Coupler 170, 226, 326 PLL
300 Pseudo terminal ANT Antenna LO Local oscillator DUP, DUP2, DUP3 Duplexer CUP Coupler FIL1, FIL2 Filter band DP Signal waveform of distributed signal during self-diagnosis TP Signal waveform of distributed signal during normal operation RP Received signal (received wave) Frequency characteristics DP Frequency characteristics of received signals (received waves) during self-diagnosis TP Frequency characteristics of received signals (received waves) during normal operation

Claims (4)

An antenna for transmitting and receiving signals;
A duplexer for separating a transmission path of a transmission signal transmitted from the antenna and a reception path of a reception signal received by the antenna;
A radio having a self-diagnosis function,
A distribution unit that distributes a transmission signal from the transmission path in a front stage of the duplexer;
A phase shifter for adjusting the phase of the transmission signal distributed by the distribution unit;
A coupling unit that couples a transmission signal, the phase of which is adjusted by the phase shifter, to the reception path at a subsequent stage of the duplexer;
A control unit that controls the phase shifter so that the phase of the transmission signal distributed by the distribution unit at the time of self-diagnosis is the same as the phase of the transmission signal that has flowed into the reception path through the duplexer; ,
A wireless device having a self-diagnosis function. The radio having the self-diagnosis function according to claim 1,
The controller is
If it is not during self-diagnosis, the phase shifter is controlled so that the phase of the transmission signal distributed by the distribution unit is opposite to the phase of the transmission signal that has flowed into the reception path through the duplexer. ,
A wireless device having a self-diagnosis function. In the radio having the self-diagnosis function according to claim 1 or 2,
A first filter that passes the reception signal received by the antenna, and a second filter that passes the transmission signal distributed from the distribution unit, on the reception path;
A wireless device having a self-diagnosis function. Transmitting and receiving signals with an antenna;
Separating a transmission path of a transmission signal transmitted from the antenna by a duplexer and a reception path of a reception signal received by the antenna;
A method of controlling a radio having a self-diagnosis function, further comprising:
Distributing a transmission signal from the transmission path in a front stage of the duplexer;
Adjusting the phase of the transmission signal distributed in the distributing step with a phase shifter;
Coupling the transmission signal, the phase of which has been adjusted in the adjusting step, to the reception path at a coupling unit subsequent to the duplexer;
Controlling the phase shifter so that the phase of the transmission signal distributed in the distributing step is the same as the phase of the transmission signal flowing into the reception path through the duplexer during self-diagnosis; ,
A method for controlling a radio having a self-diagnosis function, comprising:

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