JP2010171724A - Radio communication apparatus, radio communication method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a configuration for canceling interference signals when a plurality of communication systems are provided in a case. <P>SOLUTION: A radio communication apparatus includes: a first wireless section provided with a first transmitting/receiving section; a second wireless section that is provided with at least a second receiving section and operates in a different radio system from the first wireless section; a computation section that finds out a disturbance wave that is produced in the reception frequency band of the second receiving section due to the transmission of the first wireless section, by computation; and a disturbance wave suppression section that suppresses the disturbance wave based on the computation result at the computation section in the second wireless section. The width, frequency and phase of the disturbance wave are obtained by computation. Thus, an influence of disturbance wave is suppressed in the apparatus. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a radio communication technique, and more particularly, to a radio communication apparatus including a plurality of communication units that perform radio communication at different frequencies and a radio communication technique using the same.

  Even if a plurality of wireless communication systems that perform communication in different frequency bands are communicated at the same time, the transmission signal from one may interfere with the other reception signal, resulting in a decrease in communication quality. It becomes difficult. Here, the transmission signal means a signal including a target transmission wave used for actual communication, a harmonic signal of the transmission wave, and other so-called spurious signals such as other frequency components and intermodulation waves. In particular, when a plurality of wireless communication systems are provided in one device (housing) and coexist, the design becomes increasingly difficult.

  In other words, even if the line design is assumed until a plurality of wireless communication systems are located at a certain short distance, they are installed in the same housing or another wireless system can be attached to and detached from a certain wireless communication device. In many cases, coexistence is not considered. In addition, since coordination between base stations communicating with each mobile station is not taken into consideration, timing adjustment in the transmission / reception section is not performed.

Although it is possible to avoid interference by restricting simultaneous use in the terminal on the terminal side, it is not preferable because it reduces the attractiveness of the terminal to use multiple systems simultaneously. In addition, there is a method of devising the arrangement in the terminal to ensure the distance between the antennas in order to ensure the isolation between the antennas, but there is a limit due to the restriction of designing in the terminal, the design of the terminal It is not preferable from the viewpoint of losing the degree of freedom of the surface.
In the following Patent Documents 1 to 4, it is proposed to extract an interference wave component from a transmission path and synthesize it in a reception system.

Special table 2007-505591 JP 2005-341579 A JP 2007-215184 A JP 2007-258805 A

  However, in the conventional method using a signal extracted directly from the transmission path, the interference wave is canceled (suppressed by canceling) by synthesizing a signal having the same amplitude as that of the interference signal with an opposite phase. However, there is a problem that fine adjustment of the phase and amplitude is difficult and the circuit scale becomes large. This is because the interfering signal component (noise component) and the signal component for canceling are originally the same signal, and a mechanism for adjusting the amplitude and phase is necessary, and it is continuously adjusted. Therefore, there is a problem that the circuit becomes complicated and the circuit scale increases.

  In addition, when a transmission signal is extracted in a high power portion where the distortion component is generated most, there is a problem that the transmission signal is distorted because a reduction in efficiency due to the occurrence of loss and a correspondingly large power are required. In addition, when the frequency component included in the transmission signal overlaps the reception band, it can be used for cancellation, but when the transmission signal component enters the receiver and intermodulation occurs and new noise is generated in the reception band, There is also a problem that the signal component obtained by extracting the transmission wave from the transmission path cannot obtain the effect of cancellation. In addition, when another communication system is attached and detached as described above, there may be a plurality of communication systems to be attached and detached. In this case, since the interference generation mechanism is different for each communication system to be combined, it is difficult to respond flexibly.

  An object of the present invention is to simplify a configuration for canceling an interference signal in a case where a plurality of communication systems exist in one casing.

  According to one aspect of the present invention, a second radio unit having a first radio unit having a first transmission / reception unit and at least a second reception unit and operating in a radio system different from the first radio unit. A wireless unit; a computing unit that obtains an interference wave generated in the reception frequency band of the second receiving unit due to transmission of the first wireless unit by computation; and a computation in the computing unit in a second receiving unit From the result, there is provided a radio terminal apparatus comprising: an interference wave suppression unit that suppresses the interference wave. The width, frequency, and phase of the interference wave are obtained by calculation. Thereby, the influence of an interference wave can be suppressed in the apparatus. In this device, it is basically known at the design stage that the interference wave is generated, and it is assumed that the operation is performed so that the interference wave is canceled at the stage of manufacturing the product.

  According to another aspect of the present invention, a first radio unit having a first transceiver unit and a second radio unit having at least a second receiver unit and operating in a radio system different from the first radio unit. A wireless communication method in a wireless communication device comprising: a step of obtaining an interference wave generated in a reception frequency band of the second reception unit due to transmission of the first wireless unit by calculation; And a step of suppressing an interference wave based on a result of the calculation in the second receiving unit.

  Thus, the present invention may be a wireless communication method, a program for causing a computer to execute the wireless communication method, or a computer-readable recording medium for recording the program. Also good. Furthermore, the program may be acquired by a transmission medium such as the Internet.

  According to the present invention, it is possible to cancel interference waves (interference signals) in the case where there are a plurality of communication systems in the housing of the wireless communication device, and thus good communication is possible.

FIG. 1A is a diagram illustrating a configuration example of a wireless communication device according to the present embodiment. It is a figure which shows the principal part structural example of the radio | wireless communication apparatus by the modification of this Embodiment. It is the figure which showed typically the relationship between the frequency and signal in the radio | wireless communication apparatus by this Embodiment. It is the figure which showed typically the relationship between the frequency and signal in the radio | wireless communication apparatus by the 2nd Embodiment of this invention, and is a figure which shows the relationship different from FIG. It is the figure which showed the basic composition of the embodiment of this invention, and the flow of a process. It is a figure which shows an example of the transmission signal in a 1st system. It is a figure which shows the principal part structural example of the radio | wireless communication apparatus by the modification of this Embodiment. It is a flowchart figure which shows the flow of the process by this Embodiment collectively.

  Hereinafter, a wireless communication apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a diagram illustrating a configuration example of a wireless communication device according to the present embodiment. As shown in FIG. 1A, the wireless communication apparatus A according to the present embodiment can be divided into a first system B and a second system C by a dotted line virtually indicated by a symbol L1. That is, the first system and the second system can be separated. The wireless communication apparatus main body may be provided with either the first system or the second system, and the other may be in the form of a card-type wireless communication system that can be inserted into a card slot, for example. Alternatively, the main body may be configured such that both the first and second systems are detachable. Of course, the two systems may be configured so that they cannot be separated together.

  The first system B includes a first antenna 1, a duplexer 3 that is a filter that distributes different frequencies used in transmission and reception, a first reception amplifier 5, a first modulation / demodulation unit 7, The digital signal processing unit 11, a first control unit 15 a provided in the control unit 15, and a first transmission amplifier 36 are included. The second system C switches between the second control unit 15b, the second digital signal processing unit 17, the second modulation / demodulation unit 21, the combiner 23, the combiner 23, and the second transmission amplifier 31. A switch 25 for performing transmission, a second reception amplifier 27, a second transmission amplifier 31, a switch 33 for switching transmission and reception, and a second antenna 35.

  In FIG. 1A, the transmission data of the first transmission / reception buffer unit 12 is sent to the first digital signal processing unit 11 and also to the calculation unit 14. The calculation unit 14 obtains information for generating a transmission signal such as transmission power and frequency channel from the first control unit 15a, and calculates the interference wave (interference signal) from the storage unit 18 (calculation formula). Etc.) and obtain the amplitude, frequency, and phase of the interference wave by calculation. The interference wave derived thereby is transmitted as transmission data to the second transmission / reception data buffer unit 16 so as to be generated as a modulation wave of the second wireless communication system C.

  In the wireless communication apparatus A according to the present embodiment, a case is considered where the received radio wave S1 of the second antenna 35 is interfered by the signal wave S3 generated in the first system B1. In this case, the reception of the system C may be directly affected by the interference of S3, or the intermodulation wave between the signals in S3 and the system C may cause the interference. Hereinafter, a technique for generating a signal for canceling such an interference wave S3 or a cross-modulation wave with S3 will be described.

  First, a single frequency signal such as an oscillation signal of a local oscillator exists in the wireless communication apparatus A, and this signal and the transmission wave of the first system B are intermodulated and the frequency is set in the reception band of the second system C. There is a case where it is converted.

  Therefore, a cancel wave (in which a transmission signal is frequency-converted with the above-described single frequency component is calculated and the interference component is canceled by the D / A converter in the second digital signal processing unit 17 of the second system C). A cancel signal generation unit capable of directly generating a copy of an interference wave is configured.

  With this system, the operation can be turned on / off depending on the frequency relationship and transmission power level at which interference occurs, so that efficient operation is possible.

  Also, if the second system is a time-division system that uses the same frequency for transmission and reception, since transmission is not performed during reception, a signal for canceling an interference signal is also used in the modulation unit of the transmission unit that is not used. It can be generated and the circuit scale hardly increases.

  The cancel signal generation unit is roughly configured by a control unit 15, a second digital signal processing unit 17, and a second modulation / demodulation unit 21. The phase and amplitude adjustment for canceling the interference signal is performed so as to improve the reception quality by applying feedback to the modulator based on the reception quality demodulated by the digital signal processing unit. At this time, if a known signal pattern such as pilot or preamble sent from the base station is used, the demodulated signal is known, and the cancellation accuracy is obtained by combining the remaining noise and the phase and amplitude of the disturbing wave obtained by calculation. Can be increased.

  FIG. 1A shows the best mode, and the cancel signal generation unit is configured using the transmission unit of the second system, but there may be an independent cancel signal generation unit. In this case, it goes without saying that the switch 25 is not necessary.

  FIG. 1B is a diagram illustrating another configuration example of the wireless communication apparatus A illustrated in FIG. 1A. The first digital signal processing unit 11 includes a first DAC 11a and a signal processing unit 11b. Signals processed by the first control unit 15a, the first transmission data buffer unit 12, the signal processing unit 11b, and the first DAC 11a are output to the modulation unit (1) and the radio unit 7, and output transmission signals.

  The second digital signal processing unit 17 of the second system C includes a second reception data buffer unit 16, a signal processing unit 17a, a first ADC 17b, and a second ADC 17c from the second control unit 15b side. ing. The demodulator 21 includes a first LPF 51 on the first ADC 17b side, a first amplifier 55, a first mixer 63, a second LPF 55 on the second ADC 17c side, a second amplifier 57, and a second amplifier. A mixer 65 and a wireless unit (2) 6. The first mixer 63 and the second mixer 65 are mixed with the high-frequency signal from the local oscillator 61 and converted into a baseband signal having a target frequency. In this way, the first control unit 15a sends transmission data to the first digital signal processing unit 11 to generate a transmission signal, and sends the same transmission data to the second control unit 15b.

  Also, transmission data is defined. Transmission data in this specification refers to a digital data sequence that is a collection of “0” and “1”, and a modulation method and frequency (channel) required to create a high-frequency analog signal that is actually transmitted wirelessly. By using information such as the above, a signal component that interferes with the reception band of the second communication system in the spectrum of transmission from the first wireless communication system is stored in the storage unit 18. Is calculated and generated by the calculation unit 14. The interference wave is canceled by adjusting the phase at the time of generation of this signal so as to be opposite to the actual interference wave.

  The transmission channel, transmission power, and data string information to be transmitted of the first system B are included. With this information, the interference wave component for the reception of the system C generated in the first system B or the interference wave component of the reception band of the second system C generated after entering the second system C can be obtained. Can be derived and generated. Note that the first system B may provide the information related to the data string to the second system C only when interference is predicted from the transmission channel and the transmission power. Further, the reception digital signal processing unit may cancel the calculation result without generating an interference wave component by the DAC.

  That is, the second control unit 15b that has acquired the transmission data information calculates the interference signal from the first system B that appears in the output from the ADCs 17b and 17c of the second system C, and the second digital signal processing unit In 17a, processing for canceling the interference signal is performed.

  Also in this case, the digital signal processing unit 17a performs feedback for improving the signal quality by confirming the received signal quality and adjusting the phase and amplitude of the interference signal to be canceled. The same applies to the use of known signal patterns such as pilots and preambles.

  Note that FIG. 1A is a suitable application example in which the cancel signal generation unit is also used by using the transmission unit of the second system. Accordingly, the arithmetic unit 14, the storage unit 18, the second transmission / reception data buffer unit 16, the second digital signal processing unit 17, the second modulation / demodulation unit 21, and the second control unit 15b constitute an interference wave suppression unit. In the interference wave suppression unit, cancel signal is generated by cancel signal generation unit and canceled by mixing in opposite phase, or canceled by subtracting interference wave component by signal processing unit without generating cancellation wave And a case where no signal is generated. In the former case, the part to be generated and mixed (digital signal processing part in the embodiment) corresponds to the part to be canceled by signal processing (mixing part and cancel signal generation part) in the latter corresponds to the interference wave suppressing part. Further, the second system can be configured with only a receiver such as a one-segment tuner.

  FIG. 2 is a diagram schematically showing the relationship between the frequency and the signal in the wireless communication apparatus according to the present embodiment. If the frequency of the transmission signal in the first frequency band in the first system B is fTx and the frequency of the reception signal in the second frequency band in the second system C is fRx, the higher order (2 Next, third order,...) Harmonic (2fTx, 3fTx,...) Signals and modulation signals may be mixed with the band fRx of the received signal of the second system C, which is a problem with signal interference. Become. Thus, for example, if a third-order harmonic signal (3fTx, which is referred to as “interference wave” or “interference wave”) of the transmission signal of the first system B overlaps with the reception frequency band of the system C, The same signal as the interference wave is generated in the second system C. The actual third harmonic component and the phase cancellation wave from the system B that wraps around via the antenna are calculated and generated in the second system C, thereby canceling the interference wave and receiving the second system C. Interference waves to the signal can be suppressed. With respect to this, even when an interference wave is generated by the above-described cross modulation as shown in FIG. 3, it can be canceled with the same configuration by calculating it.

  Next, the principle of generating a cancel wave in the second system C will be described. When different systems are mounted in one wireless communication apparatus, the rough phase timing can be obtained at the time of design or production. However, when integrated and used by coupling with different wireless systems configured in a separate case such as a card type, or when opening and closing with an openable wireless communication terminal such as a clamshell, or a wireless communication device by a user The interference path of the signal also changes due to the change in the holding form of the signal, and fine adjustment is actually required. Therefore, by using a known signal such as a pilot signal used in the second system C, high-precision adjustment can be performed. That is, feedback control is performed so that the signal quality (noise-to-signal ratio) of the known signal can be improved by the D / A converter that can finely adjust the phase control of the known signal.

  FIG. 4 is a diagram showing the flow of the interference wave canceling method. As shown in FIG. 4, at least data transmitted by the first system is transmitted as transmission signal information of the first system from the control unit 15 a of the first system to the control unit 15 b of the second system. In addition, information necessary for generating a radio frequency band signal in the first system is also transferred to the second system. As described above, in the case of different systems that are integrated by coupling, calculation information that causes interference specific to the system may be transferred together. It is also conceivable to store in the set 2 in advance and call it by a combined system. The data converted into the information necessary for generating the interference signal obtained from these information by the second system is calculated from the control unit 15b of the second system and the storage unit 18 shown in FIG. 1A. Is transferred to the cancel signal generation unit Y having the unit 14. At this time, amplitude / phase feedback for canceling the above-described interference wave is also performed (from the system 2 demodulator 21 to the cancel signal generator Y). The cancellation signal generation unit Y includes a storage unit, a calculation unit, and a part that generates a cancellation signal in FIG. 1A, and adjusts the phase and amplitude of the interference wave (interference signal). More specifically, in the cancellation signal generation unit Y that generates a cancellation signal for canceling the interference wave in the second system, the phase / amplitude of the cancellation signal is opposite to the phase of the interference wave, and the amplitude is the same (may be the same level). ) And output to the mixer (synthesis unit) 23. The combining unit 23 combines the reception signal received by the receiving unit Z of the second system and the cancel signal. Thereby, the interference wave is almost canceled by the cancel signal, and the influence of the interference caused by the first system B on the received signal of the second system C can be suppressed.

  Note that the digital signal processing unit 17 may perform reception quality, for example, C / N measurement, which is one of the indexes, (including a C / N measurement unit). In this way, by providing a reception sensitivity measurement unit (21: C / N measurement in FIG. 4) for measuring reception sensitivity information on the second system side, it is determined whether the interference signal has been successfully canceled by the cancellation signal. It is possible to evaluate the quality and feed back the evaluation result to the cancel signal generation unit. Based on the C / N measurement result obtained as a result of the interference cancellation process, the second control unit 15b outputs an instruction regarding an appropriate amplitude and phase of the cancellation signal to the cancellation signal generation unit. It has become. With such a feedback mechanism, it is possible to form a readjustment unit that readjusts the amplitude and phase of the cancellation wave based on the measurement result.

  FIG. 5 is a diagram for explaining frequency shift keying (FSK). The states of “0” and “1” are represented by two carriers having different frequencies, and one of these carriers is transmitted as a radio signal according to the data series.

  Actually, since the data change point becomes discontinuous, a spectrum with many side lobes other than the two carrier waves (main lobes) is transmitted. There are also FSK systems using four, eight, sixteen, etc. carriers, and if there are four carriers, (00), (01), (11), (10) are assigned. When this transmission wave is distorted in its own transmission circuit or the receiving circuit of the interference partner, cross modulation occurs, and a large number of signals having new frequency components are generated. When these enter the other party's reception band, the reception sensitivity is lowered.

  Here, for simplification of explanation, frequency shift keying (FSK) modulation will be described as an example, but the modulation method is not limited. As shown in FIG. 5, when the carrier wave fc is set with respect to the frequency axis (horizontal axis), if “0” and “1” are assigned to fc−f0 and fc + f0 in the figure, “0” is assumed. The interference wave may be calculated and generated based on the transmission wave corresponding to “1” and “1”. Further, if the interfering wave is a harmonic signal, it is generated by calculating two times, three times, etc. of fc−f0 and fc + f0.

  FIG. 7 is a flowchart showing the above processing flow. As shown in FIG. 7, in the process according to the present embodiment, the process is first started (start) in step S1, and reception is performed in the second system. Whether interference occurs in step S2 based on whether the first system is transmitting, the frequency relationship of the channels used by each other, the output power of the first system, the received power of the second system, etc. Judge whether or not. In step S2, if there is no interference (No), the process proceeds to step S6, where the cancel signal generation unit is turned off and monitoring is continued to determine whether interference occurs.

  If it is determined in step S2 that interference occurs, in step S3, the cancel signal generation unit is turned on, the cancel signal is calculated and generated, and the cancel signal is combined with the reception unit of the second system. In step S4, the improvement degree of C / N is confirmed, and if it is good (Yes), the process returns to step S2 and a series of monitoring processes are involved. If the C / N condition is not good (No), the amplitude / phase of the cancellation wave generated by the second system is adjusted in step S5, and the process returns to step S4 to confirm the improvement degree of C / N again. . In this way, the adjustment of the amplitude and phase of the cancellation wave is repeated until C / N is improved. By this process, the influence of interference can be suppressed by always canceling the interference signal.

  FIG. 3 is a diagram showing the occurrence of interference, which is the subject of the present invention, in a form different from that in FIG. In the case shown in FIG. 3, the frequency component (for example, due to the output signal of the local oscillator) existing in the device and the transmission signal of the first system jumped into the second system via the antenna. This shows a case where the intermodulation component enters the reception band of the second system. Here, the frequency of the output signal of the transmitter in the wireless communication device is fs, the transmission signal in the first frequency band of the first system is fTx, and in the second frequency band of the second system. The case where the received signal is fRx is shown. In such a case, since no interference wave exists in the transmission signal of the first system, the interference signal cannot be extracted by the conventional method as described above. If the intermodulation component between the frequency component (local oscillator output, etc.) originally present in the equipment and the transmission signal of the system 1 jumped into the system 2 via the antenna enters the reception band of the system 2, the system 1 Since no interference wave exists in the transmission signal, the conventional method cannot extract the interference signal.

  Therefore, the interference wave is 2 × fs−fTx, which shows a case where the interference wave interferes with the reception signal fRx of the second system. As a cancellation wave for canceling the interference wave, a signal having a phase opposite to that of the interference wave is generated in the second system C in the second system C, and the influence of the interference can be suppressed.

  Note that it is preferable that the calculation method for generating the cancellation wave signal in the circuit unit for canceling the interference wave in the second system can be rewritten. The first system combined with the second system cannot be determined as a specific system, and the frequency band varies depending on the region where the device is used. Therefore, when designing a terminal, there is a possibility that the interference relationship may be different, so that the calculation method may be rewritable. It is also conceivable that a plurality of calculation methods are stored in the storage unit in advance so that a spurious calculation method that gives the value can be selected. As a calculation method stored in advance, a calculation method of a spurious that interferes with a frequency that is actually transmitted by the communication system or a frequency of a transmitter that is used internally can be determined in advance.

  According to the method according to the present embodiment, the first system radiates an interference signal having the same frequency as the reception band of the second system by predicting, calculating, and canceling the signal component falling into the reception band. Even if it is a case where it produces | generates, even if it is a case where it produces | generates in a 2nd system without radiating, it becomes possible to respond to both.

  FIG. 6 is a diagram illustrating an exemplary main configuration of a wireless communication apparatus according to a modification of the present embodiment. As shown in FIG. 6, the transmission data information of the first system B is input to the control unit 15b of the second system, and then output to the storage unit 15C such as a ROM table. In the ROM table 15b, for example, 2 × fs− (fc−f0) digital-analog converter (DAC) output generation data is stored, and each data can be read. The read data can be converted by the DA converter 17 and filtered by the LPF 31 to be used as a cancel wave. These functional units are synchronized by the same system clock signal. According to this method, it is not necessary to perform a special calculation, and a cancel wave can be generated quickly and easily. As the data in the ROM table 15b, since the generation relationship is known in advance, the data stored in the memory as a pair with the transmission signal can be read out.

  As described above, according to the wireless communication device according to the present embodiment, it is possible to cancel an interference signal in the case where there are a plurality of communication systems in the housing of the wireless communication device, and thus good communication is possible. It becomes.

  In addition, a program for realizing the functions described in the present embodiment is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to execute processing of each unit. May be performed. The “computer system” here includes an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.

  The “computer-readable recording medium” refers to a storage device such as a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, a semiconductor memory, and a hard disk built in the computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case is also used to hold a program for a certain period of time. The program may be a program for realizing a part of the above-described functions, or may be a program that can realize the above-described functions in combination with a program already recorded in a computer system.

  The present invention is applicable to a wireless communication device.

A ... wireless communication device, B ... first system, C ... second system, 1 ... first antenna, 3 ... duplexer, 5 ... first receiving amplifier, 7 ... first modulation / demodulation unit, 11 ... 1st digital signal processing unit, 11a ... 1st DAC, 11b ... signal processing unit, 15 ... control unit, 15a ... 1st control unit, 15b ... 2nd control unit, 17 ... 2nd digital signal processing , 17a... Signal processing unit, 17b... First ADC, 17c... Second ADC, 21... Second modulation / demodulation unit (may include C / N measurement unit), 23. 27 ... second receiving amplifier, 31 ... second transmission amplifier, 33 ... switch, 35 ... second antenna, 36 ... first amplifier, 37 ... second amplifier, 41 ... clock signal source, 43 ... 1st mixer, 45 ... 2nd mixer.

Claims (12)

A first radio unit having a first transceiver unit;
A second radio unit having at least a second receiving unit and operating in a radio system different from the first radio unit;
A calculation unit that obtains an interference wave generated in the reception frequency band of the second reception unit due to the transmission of the first radio unit by calculation;
A radio terminal apparatus comprising: a second reception unit; an interference wave suppression unit configured to suppress the interference wave from a calculation result in the calculation unit. The jamming wave is
The radio terminal apparatus according to claim 1, wherein the radio terminal apparatus is a harmonic or intermodulation wave of a transmission signal from the first transmission / reception unit. The computing unit is
From information necessary for transmission signal generation of the first radio unit,
The radio terminal apparatus according to claim 2, wherein frequency information and amplitude information of the harmonics and intermodulation waves are obtained. A memory unit for storing frequency information and amplitude information of a harmonic or intermodulation wave corresponding to the transmission signal of the first wireless unit in a one-to-one correspondence;
4. The wireless terminal device according to claim 1, wherein the calculation unit sequentially reads and calculates information corresponding to a transmission signal from the first transmission / reception unit. 5. The interference wave suppressing unit is
5. The wireless terminal according to claim 1, wherein the wireless terminal is a reception digital signal processing unit that subtracts an interference wave obtained by calculation in the calculation unit from a reception signal of the second reception unit. apparatus. A demodulator that demodulates the received signal of the second receiving unit;
A second digital signal processing unit that performs signal processing for restoring information of the transmission source from the output of the demodulator,
The second digital signal processing unit compares and subtracts the interference wave component included in the known signal pattern part included in the reception signal of the second reception unit and the interference wave obtained by the calculation unit. 6. The wireless terminal device according to claim 5, wherein the phase and amplitude of the interference wave are adjusted. The interference wave suppressing unit is
A modulation unit for generating a copy of the interference wave obtained by the calculation unit;
5. The wireless terminal device according to claim 1, comprising: a mixing unit that mixes the replica generated by the modulation unit and the reception signal of the first reception unit. 6. A demodulator that demodulates the received signal of the second receiving unit;
A second digital signal processing unit that performs signal processing for restoring information of the transmission source from the output of the demodulator,
The interference signal component included in the known signal pattern part included in the received signal of the second reception part and the interference wave obtained by the arithmetic part are compared and copied by the second digital signal processing part. The radio terminal apparatus according to claim 7, wherein a phase and an amplitude of the interference wave are adjusted.   The radio communication apparatus according to claim 1, wherein the first radio unit and the second radio unit are configured to be physically separable. And a reception quality measuring unit that measures reception quality in the second receiving unit,
The radio communication according to any one of claims 5 to 9, wherein an amplitude and a phase of an interference wave in the interference wave suppression unit are readjusted so that reception quality is improved as a result of the measurement. apparatus. A wireless communication apparatus comprising: a first wireless unit having a first transmitting / receiving unit; and a second wireless unit having at least a second receiving unit and operating in a wireless system different from the first wireless unit. A wireless communication method,
A step of calculating an interference wave generated in the reception frequency band of the second reception unit due to the transmission of the first radio unit by calculation; and a disturbance wave based on a result of the calculation in the second reception unit. A step of suppressing,
A wireless communication method comprising: A program for causing a computer to execute the wireless communication method according to claim 11.

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