JP6311497B2 - Wireless device - Google Patents

Description

  The present invention relates to a wireless device.

  2. Description of the Related Art Conventionally, a communication device equipped with a wireless device is provided with a specification regarding the frequency and amplitude (that is, power) of a transmission signal (hereinafter sometimes referred to as “frequency amplitude specification”) according to a communication standard. That is, a range in which the amplitude of the transmission signal at a certain frequency is defined is defined. Conventionally, before the communication device is shipped, the wireless device is adjusted so that the transmission signal satisfies the “frequency amplitude regulation”.

JP2011-188321A JP 2010-041269 A

  However, since the characteristics of electronic components such as amplifiers change with the passage of time and temperature, even if the wireless device is adjusted once, the amplitude deviation with respect to the frequency of the transmission signal from the wireless device (hereinafter referred to as “frequency amplitude deviation”). May not meet the “frequency amplitude specification”. That is, there is a possibility that the “frequency amplitude deviation” of the transmission signal of the wireless device may not fall within the “frequency amplitude range” defined by the “frequency amplitude specification”. Recently, the frequency amplitude regulation of communication standards has become stricter and the transmission band of communication devices tends to become wider, so the “frequency amplitude deviation” of the transmission signal of the wireless device does not fit within the “frequency amplitude range”. There is a tendency to increase the possibility of disappearance.

  In addition, if the “frequency amplitude deviation” of the transmission signal of the wireless device does not fall within the “frequency amplitude range”, the processing effect of the processing for compensating for the nonlinear distortion of the amplifier (that is, “digital predistortion”) decreases. There is a possibility that.

  Therefore, it is desired to further improve the accuracy of the output power of the wireless device.

  The disclosed technology has been made in view of the above, and an object thereof is to provide a wireless device capable of improving the accuracy of output power.

  In the disclosed aspect, the wireless device includes a correction processing unit, an amplifier, a monitor signal output unit, a first detection unit, a second detection unit, and a correction control unit. The correction processing unit corrects an amplitude deviation in the frequency range of the input signal based on a correction coefficient. The amplifier amplifies and outputs the signal corrected by the correction processing unit. The monitor signal output unit outputs a monitor signal in the frequency range to the correction processing unit. The first detection unit receives the monitor signal output from the amplifier via a first path including a down converter, an analog-digital conversion unit, and a first band-limiting filter, and receives the first path. And detecting a first amplitude deviation of the monitor signal received via. The second detection unit receives the monitor signal output from the amplifier via a second path that does not include the down converter, the analog-digital conversion unit, and the first band-limiting filter, and The second amplitude deviation of the monitor signal received via the second path is detected. The correction control unit adjusts the correction coefficient based on the second amplitude deviation, and adjusts a filter coefficient of the first band limiting filter based on the first amplitude deviation.

  According to the disclosed aspect, the accuracy of output power can be improved.

FIG. 1 is a block diagram illustrating an example of a wireless device according to the first embodiment. FIG. 2 is a block diagram illustrating an example of the correction processing unit according to the first embodiment. FIG. 3 is a flowchart illustrating an example of a processing operation of the wireless device according to the first embodiment. FIG. 4 is a diagram for explaining the processing operation of the wireless device according to the first embodiment. FIG. 5 is a diagram for explaining the processing operation of the wireless device according to the first embodiment. FIG. 6 is a diagram for explaining the processing operation of the wireless device according to the first embodiment. FIG. 7 is a diagram for explaining the processing operation of the wireless device according to the first embodiment. FIG. 8 is a diagram for explaining the processing operation of the wireless device according to the first embodiment. FIG. 9 is a diagram for explaining the processing operation of the wireless device according to the first embodiment. FIG. 10 is a block diagram illustrating an example of a wireless device according to another embodiment. FIG. 11 is a diagram illustrating a hardware configuration example of the wireless device.

  Hereinafter, embodiments of a wireless device disclosed in the present application will be described in detail with reference to the drawings. Note that the wireless device disclosed in the present application is not limited by this embodiment. Moreover, the same code | symbol is attached | subjected to the structure which has the same function in embodiment, and the overlapping description is abbreviate | omitted.

[Example 1]
FIG. 1 is a block diagram illustrating an example of a wireless device according to the first embodiment. In FIG. 1, a wireless device 10 includes a monitor signal output unit 11, a digital-analog conversion unit (DAC) 12, a correction processing unit 13, an up converter 14, a power amplifier (PA) 15, a coupler 16, And a switch 17. In addition, the wireless device 10 includes detection units 18 and 22, a down converter 19, an analog / digital conversion unit (ADC) 20, a filter 21, a correction control unit 23, a distortion compensation coefficient calculation unit 24, and a lookup table. (LUT) 25 and a multiplication unit 26.

  The monitor signal output unit 11 outputs a “monitor signal” to the DAC 12 during the “correction period” in accordance with the control by the correction control unit 23. The “monitor signal” has, for example, the same “frequency range” as the “transmission band” of the transmission signal. For example, the “monitor signal” may include a plurality of CW (unmodulated continuous wave) signals corresponding to the plurality of frequency points in the “transmission band”. In the “correction period”, the monitor signal output unit 11 outputs CW signals in order from, for example, those having a low frequency. Note that the correction period repeatedly appears at a predetermined interval, for example.

  The DAC 12 receives the transmission signal output from the multiplication unit 26 in the “transmission period”. The “transmission period” is a transmission period of time division multiplexing when a time division multiplexing (TDD) method is applied to a communication apparatus (not shown) in which the wireless device 10 is mounted. Further, the DAC 12 inputs a monitor signal from the monitor signal output unit 11 during the “correction period”. For example, when the time division multiplexing method applied to the communication device in which the wireless device 10 is mounted is applied, the correction period may be the time division multiplexing reception period (that is, reception operation timing).

  Then, the DAC 12 performs digital-analog conversion on the input signal and outputs the obtained analog signal to the correction processing unit 13.

  The correction processing unit 13 corrects the “amplitude deviation in the frequency range” of the analog signal received from the DAC 12 based on the “correction coefficient”, and outputs the analog signal after the amplitude deviation correction processing to the up-converter 14. The correction processing unit 13 corrects (adjusts) the “correction coefficient” based on the “adjustment value” received from the correction control unit 23.

  FIG. 2 is a block diagram illustrating an example of the correction processing unit according to the first embodiment. In FIG. 2, the correction processing unit 13 includes a filter 31 and an equalizer 32.

  The filter 31 corrects the “amplitude deviation in the frequency range” of the analog signal received from the DAC 12 based on the “correction coefficient (that is, filter coefficient)”. Further, the filter 31 corrects (adjusts) the “correction coefficient” based on the “first adjustment value” received from the correction control unit 23.

  The equalizer 32 further corrects the “amplitude deviation in the frequency range” of the analog signal corrected by the filter 31 based on the “correction coefficient (that is, filter coefficient)”. Further, the equalizer 32 corrects (adjusts) the “correction coefficient” based on the “second adjustment value” received from the correction control unit 23.

  That is, the “adjustment value” received from the correction control unit 23 includes the “first adjustment value” and the “second adjustment value”.

  The up-converter 14 up-converts the analog signal after the amplitude deviation correction process output from the correction processing unit 13 and outputs the obtained radio signal to the PA 15.

  PA 15 amplifies the radio signal output from up-converter 14 and outputs the amplified radio signal to coupler 16.

  The combiner 16 outputs a part of the radio signal output from the PA 15 to the down converter 19 (that is, “to the first path”), and outputs the rest to the switch 17.

  The switch 17 switches the connection relationship between the output of the coupler 16, the antenna, and the detection unit 18 (that is, “second path”) according to the control of the correction control unit 23. That is, the switch 17 connects the coupler 16 and the antenna in the “transmission period”. Thereby, the transmission signal is transmitted via the antenna. The switch 17 connects the coupler 16 and the second path in the “correction period”. As a result, the monitor signal is input to the detection unit 18.

  The detection unit 18 detects an amplitude deviation in the frequency range (that is, transmission band) of the monitor signal received via the second path in the “correction period” (hereinafter, may be referred to as “second amplitude deviation”). Is detected. That is, the detection unit 18 detects the amplitude value of each CW signal received via the second path. Here, the “second amplitude deviation” detected by the detection unit 18 is caused by the “transmission processing system” including the DAC 12, the up-converter 14, and the PA 15.

  The down converter 19 down-converts the radio signal received from the coupler 16 and outputs the obtained signal to the ADC 20. Here, a radio signal as a monitor signal is input to the down converter 19 during the “correction period”, and a radio signal as a transmission signal is input during the “transmission period”.

  The ADC 20 performs analog-digital conversion on the signal output from the down converter 19 and outputs the obtained digital signal to the filter 21.

  The filter 21 corrects the “amplitude deviation in the frequency range” of the digital signal received from the ADC 20 based on the “filter coefficient”. Further, the filter 21 corrects (adjusts) the “correction coefficient” based on the “third adjustment value” received from the correction control unit 23. The filter 21 outputs the digital signal after the amplitude deviation correction process to the detection unit 22 and the distortion compensation coefficient calculation unit 24.

  The detection unit 22 may be referred to as an amplitude deviation (hereinafter, “first amplitude deviation”) in the frequency range (that is, transmission band) of the monitor signal received through the “first path” in the “correction period”. ) Is detected. That is, the detection unit 22 detects the amplitude value of each CW signal received via the “first path”. Here, the “first path” includes a “feedback system” including the down converter 19, the ADC 20, and the filter 21.

  The correction control unit 23 adjusts the correction coefficient of the correction processing unit 13 based on the “second amplitude deviation” detected by the detection unit 18, and changes the correction coefficient to the “first amplitude deviation” detected by the detection unit 22. Based on this, the filter coefficient of the filter 21 is adjusted.

  For example, in the “first correction procedure (first correction period)”, the correction control unit 23 causes the monitor signal output unit 11 to output a monitor signal, and the “second amplitude” obtained based on the monitor signal is output. The correction coefficient of the correction processing unit 13 is adjusted based on “deviation”. That is, in the “first correction procedure”, the amplitude deviation due to the transmission processing system is corrected. The “second amplitude deviation” may be referred to as “forward (FW) system inclination”.

  For example, in the “first correction procedure”, the correction control unit 23 sets the amplitude value of the monitor signal corresponding to the minimum value of the frequency of the “frequency range” in the second amplitude deviation, and the above “frequency range”. The “first difference” from the amplitude value of the monitor signal corresponding to the maximum value of the frequency is calculated. Then, the correction control unit 23 calculates an adjustment value of the correction coefficient of the correction processing unit 13 based on the calculated “first difference”. For example, the correction control unit 23 quantizes the calculated “first difference” to obtain a quantized bit string. Then, the correction control unit 23 calculates the “first adjustment value” based on the upper bits of the quantized bit string, and the above “second adjustment value” based on the lower bits of the quantized bit string. Is calculated. That is, the correction step size of the filter 31 is larger than the correction step size of the equalizer 32. For this reason, when the first difference is less than the first threshold, that is, less than the correction step size of the filter 31, the first adjustment value is zero. Note that when the first difference is less than the second threshold (the second threshold is smaller than the first threshold), both the first adjustment value and the second adjustment value may be zero.

  Then, the correction control unit 23 outputs the calculated adjustment value of the correction coefficient of the correction processing unit 13 to the correction processing unit 13.

  Further, the correction control unit 23 causes the monitor signal output unit 11 to output a monitor signal in the “second correction procedure” after the “first correction procedure”, and the “first correction procedure” is obtained based on the monitor signal. Based on “1 amplitude deviation”, the filter coefficient of the filter 21 is adjusted. That is, in the “second correction procedure”, the amplitude deviation due to both the transmission processing system and the feedback system is corrected. However, since the amplitude deviation due to the transmission processing system has already been corrected in the first correction procedure, the amplitude deviation due to the feedback system is substantially corrected in the second correction procedure. Yes. For this reason, the “first amplitude deviation” may be referred to as “feedback (FB) system tilt”. Thus, by correcting the amplitude deviation in two stages, the correction accuracy can be improved and the time required for the correction can be shortened.

  For example, in the “second correction procedure”, the correction control unit 23 sets the amplitude value of the monitor signal corresponding to the minimum value of the frequency in the “frequency range” and the maximum value of the frequency in the “frequency range” in the first amplitude deviation. The “second difference” with the amplitude value of the monitor signal corresponding to is calculated. The correction control unit 23 calculates the “third adjustment value” of the filter coefficient of the filter 21 based on the calculated “second difference”. If the second difference is less than the third threshold value, the third adjustment value may be zero.

  Then, the correction control unit 23 outputs the calculated “third adjustment value” of the filter coefficient of the filter 21 to the filter 21.

  In the “transmission period”, the distortion compensation coefficient calculation unit 24 updates the distortion compensation coefficient based on the transmission signal, the feedback signal from the “first path”, and the distortion compensation coefficient output from the LUT 25 to the multiplication unit 26. The value is calculated, and the LUT 25 is updated with the calculated update value of the distortion compensation coefficient. As a result, the distortion compensation coefficient is updated so that the difference between the transmission signal and the feedback signal becomes small.

  The LUT 25 reads the distortion compensation coefficient from the table using the amplitude value of the transmission signal as an address, and outputs the read distortion compensation coefficient to the multiplication unit 26 and the distortion compensation coefficient calculation unit 24.

  The multiplier 26 multiplies the transmission signal by the distortion compensation coefficient from the LUT 25, and outputs the transmission signal after the distortion compensation processing to the DAC 12.

[Example of wireless device operation]
An example of the processing operation of the wireless device 10 having the above configuration will be described. FIG. 3 is a flowchart illustrating an example of a processing operation of the wireless device according to the first embodiment. 4 to 9 are diagrams for explaining the processing operation of the wireless apparatus according to the first embodiment.

  In the “first correction period”, the monitor signal output unit 11 outputs a monitor signal according to the control by the correction control unit 23 (step S101). As shown in FIG. 4, the monitor signal includes a plurality of CW signals corresponding to a plurality of frequency points (frequency 1 to frequency n) in the “adjustment target frequency range”. The amplitudes of the plurality of CW signals are the same. And the monitor signal output part 11 outputs a CW signal in an order from a low frequency.

  The detection unit 18 detects the second amplitude deviation of the monitor signal received via the second path in the “first correction period” (step S102). That is, as shown in FIG. 5, the curve connecting the amplitude values of the CW signals is the amplitude deviation H1 with respect to the frequency.

  The correction control unit 23 adjusts the correction coefficient of the correction processing unit 13 based on the “second amplitude deviation” detected by the detection unit 18 (step S103).

For example, the correction control unit 23 determines whether or not the “second amplitude deviation” is within the above “frequency amplitude range”. That is, the correction control unit 23 determines whether or not the amplitude of the CW signal detected by the detection unit 18 does not fall within the “target amplitude range”. The range A1 shown in FIG. 5 is a “frequency amplitude range”. When the “second amplitude deviation” does not fall within the “frequency amplitude range”, the correction control unit 23 monitors the monitor signal corresponding to the minimum value of the frequency of the “frequency range” in the second amplitude deviation. Is calculated as “the first difference ΔP ₁ ” between the amplitude value of the monitor signal (point P 1 in FIG. 6) and the amplitude value of the monitor signal (point P 2 in FIG. 6) corresponding to the maximum frequency value in the “frequency range”. To do. Then, the correction control unit 23 calculates an adjustment value of the correction coefficient of the correction processing unit 13 based on the calculated “first difference ΔP ₁ ”.

For example, as shown in FIG. 7, when the first difference ΔP ₁ is equal to or greater than the second threshold value α and less than the first threshold value β, the correction control unit 23 determines the correction coefficient of the filter 31 and the correction coefficient of the equalizer 32. Only the correction coefficient of the equalizer 32 is adjusted. Further, the correction control unit 23 adjusts both the correction coefficient of the filter 31 and the correction coefficient of the equalizer 32 when the first difference ΔP ₁ is equal to or larger than the first threshold value β. When the first difference ΔP ₁ is less than the second threshold value α, the correction control unit 23 does not adjust both the correction coefficient of the filter 31 and the correction coefficient of the equalizer 32. If the “second amplitude deviation” is within the “frequency amplitude range”, step S103 may be skipped and the process flow may proceed to step S104. Further, the processing from step S101 to step S103 may be repeatedly executed until the “second amplitude deviation” falls within the above “frequency amplitude range”.

  Returning to the description of FIG. 3, the monitor signal output unit 11 outputs a monitor signal in accordance with control by the correction control unit 23 in the “second correction period” (step S <b> 104). The monitor signal in the second correction period is the same as the monitor signal in the “first correction period” (see FIG. 4).

  The detection unit 22 detects the first amplitude deviation of the monitor signal received via the “first path” in the “second correction period” (step S105).

  The correction control unit 23 adjusts the filter coefficient of the filter 21 based on the “first amplitude deviation” detected by the detection unit 22 (step S106).

For example, the correction control unit 23 determines whether the “first amplitude deviation” is within the above “frequency amplitude range”. That is, the correction control unit 23 determines whether or not the amplitude of the CW signal detected by the detection unit 22 is not included in the “target amplitude range”. When the “first amplitude deviation” does not fall within the “frequency amplitude range”, the correction control unit 23 monitors the monitor signal corresponding to the minimum value of the frequency of the “frequency range” in the first amplitude deviation. And the second value ΔP _{2 of} the monitor signal corresponding to the maximum value of the frequency in the “frequency range” (point P2 in FIG. 6) is calculated. To do. Then, the correction control unit 23 calculates the adjustment value of the filter coefficient of the filter 21 based on the calculated “second difference ΔP ₂ ”.

For example, as illustrated in FIG. 8, the correction control unit 23 adjusts the filter coefficient of the filter 21 when the second difference ΔP ₂ is greater than or equal to the third threshold γ. On the other hand, the correction control unit 23, as shown in FIG. 8, when the second difference [Delta] P ₂ is less than the third threshold value gamma, it is not necessary to adjust the filter coefficients of the filter 21. Note that the processing from step S104 to step S106 may be repeatedly executed until the “first amplitude deviation” falls within the above “frequency amplitude range”.

  By repeating the correction procedure as described above, the amplitude deviation H2 with respect to the frequency falls within the frequency amplitude range A1, as shown in FIG.

  As described above, according to the present embodiment, in the wireless device 10, the correction processing unit 13 corrects the amplitude deviation in the frequency range of the input signal based on the correction coefficient. The PA 15 amplifies and outputs the signal corrected by the correction processing unit 13. The monitor signal output unit 11 outputs a monitor signal in the frequency range to the correction processing unit 13. Then, the detection unit 18 detects the second amplitude deviation in the frequency range (that is, the transmission band) of the monitor signal received through the correction processing unit 13, the PA 15, and the “second path” in the “correction period”. To do. As described above, the “second path” is a path that does not include the down converter, the ADC, and the filter. Then, the correction control unit 23 adjusts the correction coefficient of the correction processing unit 13 based on the “second amplitude deviation” detected by the detection unit 18.

  With the configuration of the wireless device 10, by providing “correction periods” at predetermined time intervals, the accuracy of the output power of the wireless device 10 is improved even if the characteristics of the PA 15 change according to the passage of time or temperature. be able to. Further, since the correction coefficient of the correction processing unit 13 is adjusted based on the second amplitude deviation detected based on the monitor signal that has passed through the path not including the down converter, the ADC, and the filter, the transmission processing system including the PA 15 Correction specific to the resulting frequency amplitude deviation is possible.

  In the wireless device 10, the detection unit 22 receives the monitor signal output from the PA 15 in the “correction period” via the “first path” including the down converter 19, the ADC 20, and the filter 21. The first amplitude deviation of the monitor signal received through the path is detected. Then, the correction control unit 23 adjusts the filter coefficient of the filter 21 based on the “first amplitude deviation” detected by the detection unit 22.

  With the configuration of the wireless device 10, by providing “correction periods” at predetermined time intervals, even if the characteristics of the PA 15, the down converter 19, the ADC 20, the filter 21, and the like change with time and temperature, The accuracy of the output power of the wireless device 10 can be improved.

  Further, in the wireless device 10, the correction control unit 23 adjusts the correction coefficient of the correction processing unit 13 based on the second amplitude deviation and detects the first detected from the monitor signal output from the monitor signal output unit 11. Based on the amplitude deviation, the filter coefficient of the filter 21 is adjusted.

  With the configuration of the wireless device 10, the amplitude deviation can be corrected in two stages, so that the correction accuracy can be improved and the time required for the correction can be shortened.

  Further, when the time division multiplexing method applied to the communication apparatus in which the wireless device 10 is mounted is applied, the correction period may be the time division multiplexing reception period (that is, the reception operation timing). As a result, during the operation of the communication apparatus, “correction periods” can be provided at predetermined time intervals.

[Other embodiments]
[1] The filter 31 and the equalizer 32 of the first embodiment may be provided in the DAC 12 and the up-converter 14, respectively.

  [2] In the first embodiment, the correction of the frequency amplitude deviation of the transmission processing system and the feedback system has been described. However, the present invention is not limited to this, and the frequency amplitude deviation may be corrected by the reception processing system. FIG. 10 is a block diagram illustrating an example of a wireless device according to another embodiment. FIG. 10 shows a configuration related to the reception processing system.

  10, the wireless device 50 includes a monitor signal output unit 51, a switch 52, a down converter 53, a correction processing unit 54, an ADC 55, a detection unit 56, a correction control unit 57, and a reception processing unit 58. Have

  The monitor signal output unit 51 outputs a “monitor signal” to the switch 52 during the “correction period” in accordance with the control by the correction control unit 57. The “monitor signal” has, for example, the same “frequency range” as the “reception band” of the received signal. For example, the “monitor signal” may include a plurality of CW (unmodulated continuous wave) signals corresponding to the plurality of frequency points in the “reception band”. In the “correction period”, the monitor signal output unit 51 outputs CW signals in order from, for example, those having a low frequency. Note that the correction period repeatedly appears at a predetermined interval, for example.

  The switch 52 switches the connection relationship between the down converter 53, the monitor signal output unit 51, and the antenna according to the control of the correction control unit 57. That is, the switch 52 connects the antenna and the down converter 53 in the “reception period”. As a result, the signal received by the antenna is input to the down converter 53. The switch 52 connects the monitor signal output unit 51 and the down converter 53 in the “correction period”. As a result, the monitor signal is input to the down converter 53.

  The down converter 53 down-converts the signal received via the switch 52 and outputs the obtained signal to the correction processing unit 54. Here, the radio signal of the monitor signal is input to the down converter 53 during the “correction period” and the radio signal of the reception signal is input during the “reception period”.

  The correction processing unit 54 corrects the “amplitude deviation in the frequency range” of the signal received from the down converter 53 based on the “correction coefficient”, and outputs the signal after the amplitude deviation correction processing to the ADC 55. The correction processing unit 54 corrects (adjusts) the “correction coefficient” based on the “adjustment value” received from the correction control unit 57.

  The ADC 55 performs analog-to-digital conversion on the signal output from the down converter 53 and outputs the obtained digital signal to the detection unit 56 and the reception processing unit 58.

  The detection unit 56 detects an amplitude deviation in the frequency range (that is, the reception band) of the monitor signal received via the ADC 55 in the “correction period”. That is, the detection unit 56 detects the amplitude value of each CW signal received via the ADC 55.

  The correction control unit 57 adjusts the correction coefficient of the correction processing unit 54 based on the amplitude deviation detected by the detection unit 56.

  The reception processing unit 58 performs predetermined reception processing (demodulation, decoding, etc.) on the reception signal received via the ADC 55 in the “reception period” and outputs the obtained reception data.

  [3] Each component of each part illustrated in the first embodiment does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each part is not limited to the one shown in the figure, and all or a part thereof may be functionally or physically distributed / integrated in arbitrary units according to various loads and usage conditions. Can be configured.

  Furthermore, various processing functions performed in each device are performed on a CPU (Central Processing Unit) (or a microcomputer such as an MPU (Micro Processing Unit), MCU (Micro Controller Unit), etc.) in whole or in part. You may make it perform. Various processing functions may be executed entirely or arbitrarily on a program that is analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or hardware based on wired logic. .

  The radio apparatus according to the first embodiment can be realized by the following hardware configuration, for example.

  FIG. 11 is a diagram illustrating a hardware configuration example of the wireless device. As illustrated in FIG. 11, the wireless device 100 includes an I / F (Inter Face) 101, a processor 102, a DAC 103, a correction circuit 104, an up-converter 105, a PA 106, and a coupler 107. In addition, the wireless device 100 includes a switch 108, a down converter 109, an ADC 110, and a memory 111. The I / F 101 is an interface that transmits and receives signals to and from a control device (not shown). Examples of the processor 102 include a CPU, a DSP (Digital Signal Processor), and an FPGA (Field Programmable Gate Array). Further, examples of the memory 111 include a RAM (Random Access Memory) such as SDRAM (Synchronous Dynamic Random Access Memory), a ROM (Read Only Memory), a flash memory, and the like.

  Various processing functions performed by the wireless device according to the first embodiment may be realized by executing programs stored in various memories such as a nonvolatile storage medium using a processor included in the wireless device. That is, a program corresponding to each process executed by the monitor signal output unit 11, the detection units 18 and 22, the correction control unit 23, the distortion compensation coefficient calculation unit 24, the lookup table 25, and the multiplication unit 26 is recorded in the memory 111. Each program may be executed by the processor 102. In addition, the DAC 12, the correction processing unit 13, the up converter 14, the PA 15, the coupler 16, the switch 17, the down converter 19, and the ADC 20 are the DAC 103, the correction circuit 104, the up converter 105, the PA 106, the coupler 107, the switch 108, and the down. These are realized by the converter 109 and the ADC 110, respectively.

  Here, various processing functions performed by the wireless device of the first embodiment are executed by one processor 102, but the present invention is not limited to this, and may be executed by a plurality of processors.

DESCRIPTION OF SYMBOLS 10 Radio | wireless apparatus 11 Monitor signal output part 12 Digital analog conversion part 13 Correction processing part 14 Up converter 15 Power amplifier 16 Coupler 17 Switch 18, 22 Detection part 19 Down converter 20 Analog digital conversion part 21 Filter 23 Correction control part 24 Distortion compensation Coefficient calculator 25 Look-up table 26 Multiplier 31 Filter 32 Equalizer

Claims (5)

A correction processing unit that corrects an amplitude deviation in the frequency range of the input signal based on a correction coefficient;
An amplifier that amplifies and outputs the signal corrected by the correction processing unit;
A monitor signal output unit for outputting a monitor signal in the frequency range to the correction processing unit;
The monitor signal output from the amplifier is received via a first path including a down converter, an analog-digital converter, and a first band limiting filter, and the monitor signal received via the first path A first detector for detecting an amplitude deviation of 1;
The monitor signal output from the amplifier is received via the second path that does not include the down converter, the analog-digital converter, and the first band-limiting filter, and is received via the second path. A second detector for detecting a second amplitude deviation of the monitor signal;
A correction control unit that adjusts the correction coefficient based on the second amplitude deviation, and adjusts a filter coefficient of the first band-limiting filter based on the first amplitude deviation;
A wireless device comprising: The correction control unit adjusts the correction coefficient based on the second amplitude deviation, and then adjusts the correction coefficient based on the first amplitude deviation detected for the monitor signal output from the monitor signal output unit. Adjust the filter coefficient of the band-limiting filter of
The wireless device according to claim 1. The correction processing unit includes a second band limiting filter having a large correction step size with respect to amplitude for each frequency, and an equalizer having a correction step size smaller than that of the second band limiting filter,
The correction control unit includes an amplitude value of the monitor signal corresponding to a minimum value of the frequency in the frequency range and an amplitude value of the monitor signal corresponding to the maximum value of the frequency in the frequency range in the second amplitude deviation. When the first difference is less than the threshold, the correction coefficient of the equalizer is not adjusted and the correction coefficient of the second band limiting filter is adjusted. When the first difference is equal to or larger than the threshold, the second band limiting Adjusting both the correction factor of the filter and the correction factor of the equalizer,
The wireless device according to claim 1, wherein the wireless device is a wireless device. The correction control unit calculates an adjustment value for each of the correction coefficient of the second band limiting filter and the correction coefficient of the equalizer based on the first difference, and the filter coefficient of the first band limiting filter Of the monitor signal corresponding to the minimum value of the frequency in the frequency range and the amplitude value of the monitor signal corresponding to the maximum value of the frequency in the frequency range in the first amplitude deviation. Calculated based on the difference between the two,
The wireless device according to claim 3. The monitor signal output unit outputs the monitor signal at a reception operation timing of a communication device in which the wireless device is mounted.
The radio apparatus according to claim 1, wherein the radio apparatus is a radio apparatus.

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