JP2019179954A - Transmitter, exciter and signal output method - Google Patents

Abstract

To reduce time shift of transmission signal generated when changing over multiple amplifiers, in a transmitter of redundant configuration.SOLUTION: A transmitter 1 has multiple amplifiers 12, 13, multiple monitors 14, 15 outputting monitor signals of the multiple amplifiers 12, 13, an output selection part 16 for selecting the outputs from the multiple amplifiers 12, 13, and an exciter 11 performing distortion compensation processing corresponding to the multiple amplifiers 12, 13. The exciter 11 has a distortion compensation processing section 111 performing distortion compensation processing on the basis of the multiple monitor signals, multiple DA converters 112, 113 provided corresponding to the multiple amplifiers 12, 13, respectively, and performing DA conversion of the digital signal subjected to distortion compensation processing, and a phase control section 114 for controlling the multiple DA converters 112, 113 to perform phase shift control of the analog signal subjected to DA conversion.SELECTED DRAWING: Figure 1

Description

  The present technology relates to a transmission device, an exciter, and a signal output method, and more particularly, to a redundant configuration transmission device, exciter, and signal output method.

  The redundant configuration transmission apparatus includes a plurality of amplification units, and when an abnormality occurs in one of the amplification units, the input signal is amplified and output using another amplification unit that is operating normally. A configuration for switching the connection is used.

  A related technique is disclosed in Patent Document 1. In the transmission device of Patent Document 1, a plurality of distribution units are provided between the input unit and the output unit, and each of the plurality of input signals is distributed to a plurality of output lines and output. ing. A plurality of first amplifying units are provided on a plurality of first output lines corresponding to one first input signal among the plurality of input signals, respectively, and a plurality corresponding to second input signals other than the first input signal. A second amplifying unit is provided in at least one of the second output lines. When an abnormality occurs in the plurality of first amplifying units, the switching unit inputs the first input signal to the first output unit that outputs the first output signal corresponding to the first input signal via the second amplifying unit. Switch the output line as

  In general, a device called an exciter is connected in front of the plurality of amplifying units to generate an input signal to the amplifying units. The exciter is an exciter that converts the frequency of the input signal. The exciter compares the input signal with a signal that monitors the output of the amplifier, and adds the inverse characteristic of the nonlinear characteristic of the amplifier to the input signal. By outputting, it has a function of compensating for the nonlinear characteristic of the amplifying unit.

  A related transmission apparatus is disclosed in Patent Document 2, for example. In the transmission device of Patent Document 2, a configuration is disclosed that enables distortion compensation of a plurality of transmission units using one feedback unit. In the transmission device disclosed in Patent Document 2, the output signal of the transmission data generation unit is input to the distortion compensation calculation unit via the selection unit. A part of the output signal of the transmitter is taken out as a feedback signal by the signal distributor. The feedback signal is input to the feedback unit via the analog selection switch, converted to a digital signal, and input to the distortion compensation calculation unit. The distortion compensation calculation unit compares the amplitude and phase shift between the output signal of the transmission data generation unit and the feedback signal of the output signal of the transmission device, and calculates and estimates the distortion of the analog transmission circuit according to, for example, the LMS method. . The obtained compensation coefficient is given to the amplitude / phase shift correction unit via the selection means, and distortion compensation processing of the transmission signal is performed.

JP 2015-231122 A JP 2006-094043 A

  In the configuration disclosed in Patent Document 2, even when the same transmission data is distributed and inputted to a plurality of amplitude / phase shift correction units, distortion compensation processing of the transmission signal is performed by the amplitude / phase shift correction unit. The phase shift of the output signal is not necessarily the same. Therefore, when switching a plurality of amplifying units having a redundant configuration, there is a possibility that a time shift occurs in a signal to be transmitted. A configuration for solving the above problem is not disclosed in Patent Document 1.

  The main object of the present invention is to provide a transmission device, an exciter, and a signal output method thereof that can reduce a time lag of transmission signals generated when switching between a plurality of amplifiers in a redundant configuration transmission device.

  A transmission device according to one aspect of the present invention selects a plurality of amplifying units, a plurality of monitors that output the monitor signals by branching the outputs of the amplifying units, and outputs from the amplifying units. An output selection unit; and an exciter that outputs a plurality of analog signals subjected to distortion compensation processing corresponding to the plurality of amplification units. The exciter distorts an input signal based on the plurality of monitor signals. A distortion compensation processing unit that outputs a digital signal that has been subjected to compensation processing; and a plurality of DA converters that are respectively provided corresponding to the plurality of amplification units and that perform DA (Digital Analog) conversion of the digital signal that has undergone the distortion compensation processing; , And a phase shift control unit that outputs an instruction to perform phase shift control of the analog signals after the DA conversion to the plurality of DA converters.

  An exciter according to another aspect of the present invention is an exciter that generates a plurality of analog signals that are respectively output to a plurality of amplification units, and that compensates for distortion based on monitor signals output from the plurality of amplification units. A distortion compensation processing unit that outputs a processed digital signal; a plurality of DA converters that are respectively provided corresponding to the plurality of amplification units and that perform DA conversion on the digital signal that has undergone the distortion compensation processing; A plurality of DA converters each having a phase shift control unit that outputs an instruction to perform phase shift control of the analog signal that has been DA converted;

  A signal output method according to still another aspect of the present invention is an exciter signal output method for generating a plurality of analog signals respectively output to a plurality of amplifying units, and outputs an input signal from the plurality of amplifying units. Output a digital signal that has been subjected to distortion compensation processing based on a plurality of monitor signals branched from each other, DA-converted each of the signals that have undergone the distortion compensation processing, and the DA-converted signal based on the monitor signal Outputs an instruction to control the phase shift.

  According to the above aspect of the present invention, in a transmission device having a redundant configuration, it is possible to reduce a time lag of transmission signals generated when switching between a plurality of amplification units.

FIG. 1 is a block diagram showing the configuration of the first embodiment. FIG. 2 is a flowchart showing the operation of FIG. FIG. 3 is a block diagram showing the configuration of the second embodiment. FIG. 4 is a flowchart illustrating operations of the data acquisition unit, the distortion component calculation unit, and the inverse characteristic application unit of FIG. FIG. 5 is a flowchart showing operations of the phase shift control unit, the reverse characteristic applying unit, and the DA converter of FIG. FIG. 6 is a block diagram illustrating a configuration of the third embodiment. FIG. 7 is a flowchart showing operations of the monitor selection unit and the data acquisition unit of FIG. FIG. 8 is a block diagram showing the configuration of the fourth embodiment. FIG. 9 is a block diagram showing the configuration of the fifth embodiment.

  Next, an exemplary first embodiment will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the first embodiment.

  As illustrated in FIG. 1, the transmission device 1 according to the present embodiment includes a plurality of amplification units 12 and 13 and an exciter that outputs a plurality of analog signals that have been subjected to distortion compensation processing corresponding to the plurality of amplification units 12 and 13. 11 is provided. The transmission apparatus 1 also branches the outputs of the plurality of amplification units 12 and 13 and outputs a monitor signal, and outputs selection unit 16 that selects the outputs from the plurality of amplification units 12 and 13. And.

  The exciter 11 performs distortion compensation processing for compensating for distortion caused by the nonlinear characteristics of the amplification units 12 and 13 on the input signal based on the plurality of monitor signals from the plurality of monitors 14 and 15. A distortion compensation processing unit 111 for outputting the digital signal. In addition, the exciter 11 includes a plurality of DA converters 112 and 113 that respectively correspond to the plurality of amplification units 12 and 13 and perform DA (Digital Analog) conversion on the distortion-compensated digital signals. In addition, the exciter 11 includes a phase shift control unit 114 that outputs an instruction to perform phase shift control of the analog signals that have been DA converted to the plurality of DA converters 112 and 113.

  For example, the phase shift control unit 114 detects the time lag between the outputs of the amplifying units 12 and 13 based on the time difference between the input signal to the distortion compensation processing unit 111 and each monitor signal detected by the distortion compensation processing unit 111. And the instruction is output to the DA converters 112 and 113 so as to reduce this time lag.

  Next, the operation of this embodiment will be described. FIG. 2 is a flowchart showing the operation of FIG. As shown in FIG. 2, first, the distortion compensation processing unit 111 performs distortion compensation processing of an input signal input to the distortion compensation processing unit 111 based on the monitor signals of the amplification units 12 and 13 output from the plurality of monitors 14 and 15. I do. The distortion compensation processing unit 111 outputs the digital signal subjected to distortion compensation processing corresponding to the amplification unit 12 to the DA converter 112 corresponding to the amplification unit 12, and the digital signal subjected to distortion compensation processing corresponding to the amplification unit 13. Is output to the DA converter 113 corresponding to the amplification unit 13 (step S1).

  The D / A converters 112 and 113 D / A convert the distortion-compensated digital signals, respectively (step S2).

  Further, the phase shift control unit 114 performs DA conversion so as to reduce the time lag of the outputs of the amplifying units 12 and 13 based on the monitor signals of the amplifying units 12 and 13 output from the plurality of monitors 14 and 15. An instruction to control the phase shift of the analog signal is output to the DA converters 112 and 113. For example, the phase shift control unit 114 acquires the time difference between the input signal to the distortion compensation processing unit 111 and each monitor signal detected by the distortion compensation processing unit 111 from the distortion compensation processing unit 111, and based on the time difference, a plurality of values are obtained. The time difference between the outputs of the amplifiers 12 and 13 is detected. Then, the phase shift control unit 114 outputs the above instruction to the DA converters 112 and 113 so as to reduce this time lag. The plurality of DA converters 112 and 113 performs phase shift control on the analog signals that have been DA-converted so as to reduce the time lag of the outputs of the plurality of amplifiers 12 and 13 and outputs the analog signals (step S3).

  As described above, in the present embodiment, the exciter 11 includes the plurality of DA converters 112 and 113 that respectively DA-convert and output the distortion-compensated digital signals, and the plurality of DA converters 112 and 113. In addition, a phase shift control unit 114 that outputs an instruction to perform phase shift control of the analog signal that has been DA-converted is provided.

  There is a possibility that there is a time lag in the signals that are subjected to the distortion compensation process and are output from the distortion compensation processing unit 111. According to the configuration of the present embodiment, the plurality of DA converters 112 and 113 cause the analog signals that have been DA-converted to be phase-shifted and output, so that the time lags of the outputs of the plurality of amplification units 12 and 13 are prevented. Can be reduced. Therefore, according to the present embodiment, it is possible to reduce the time lag of the transmission signal that occurs when the amplification unit is switched.

  Next, a second embodiment will be described. FIG. 3 is a block diagram showing the configuration of the second embodiment. As illustrated in FIG. 3, the exciter 21 of the transmission device 2 according to the second embodiment includes AD (Analog Digital) converters 2111, 2112 that sample monitor signals from the monitors 14, 15 in the distortion compensation processing unit 211. , Data acquisition units 2113 and 2116, distortion component calculation units 2114 and 2117, and inverse characteristic application units 2115 and 2118 respectively corresponding to the amplification units 12 and 13. Further, the exciter 21 includes a modulation unit 215 and excitation units 216 and 217 corresponding to the amplification units 12 and 13, respectively.

  The data acquisition unit 2113 corresponding to the amplification unit 12 acquires a monitor signal sample obtained by sampling the monitor signal from the monitor 14 from the AD converter 2111 and acquires an input signal sample obtained by sampling the input signal output from the modulation unit 215. To do. The data acquisition unit 2113 corresponding to the amplification unit 12 determines the time difference between the monitor signal from the monitor 14 and the input signal from the monitor signal sample and the input signal sample from the monitor 14. The data acquisition unit 2113 outputs the input signal sample delayed corresponding to the monitor signal sample from the monitor 14 to the distortion component calculation unit 2114 corresponding to the amplification unit 12 together with the monitor signal sample from the monitor 14.

  The distortion component calculation unit 2114 calculates the nonlinear distortion component by comparing the monitor signal sample acquired from the data acquisition unit 2113 and the delayed input signal sample, and outputs the nonlinear distortion component to the inverse characteristic application unit 2115 corresponding to the amplification unit 12.

  The inverse characteristic application unit 2115 applies a component having the inverse characteristic of the calculated distortion component to the input signal output from the modulation unit 215. In this way, the inverse characteristic applying unit 2115 corresponding to the amplifying unit 12 generates a digital signal subjected to distortion compensation processing corresponding to the amplifying unit 12 and outputs the digital signal to the DA converter 212 corresponding to the amplifying unit 12.

  The DA converter 212 DA-converts the digital signal on which distortion compensation processing corresponding to the amplification unit 12 has been performed, and outputs the digital signal to the excitation unit 216 corresponding to the amplification unit 12.

  The excitation unit 216 corresponding to the amplifying unit 12 excites the frequency of the analog signal that has been DA-converted to the frequency to be transmitted, and outputs it to the corresponding amplifying unit 12.

  Similarly, the data acquisition unit 2116 corresponding to the amplification unit 13 acquires a monitor signal sample obtained by sampling the monitor signal from the monitor 15 from the AD converter 2112, and inputs an input signal obtained by sampling the input signal output from the modulation unit 215. Get a sample. The data acquisition unit 2116 determines the time difference between the monitor signal from the monitor 15 and the input signal from the monitor signal sample from the monitor 15 and the input signal sample. The data acquisition unit 2116 outputs the input signal sample delayed corresponding to the monitor signal sample from the monitor 15 to the distortion component calculation unit 2117 corresponding to the amplification unit 13 together with the monitor signal sample from the monitor 15.

  The distortion component calculation unit 2117 compares the monitor signal sample acquired from the data acquisition unit 2116 with the delayed input signal sample, calculates a nonlinear distortion component, and outputs the nonlinear distortion component to the inverse characteristic application unit 2118 corresponding to the amplification unit 13.

  The inverse characteristic application unit 2118 applies a component having the inverse characteristic of the calculated distortion component to the input signal output from the modulation unit 215. In this way, the inverse characteristic applying unit 2118 corresponding to the amplifying unit 13 generates a digital signal subjected to the distortion compensation processing corresponding to the amplifying unit 13 and outputs the digital signal to the DA converter 213 corresponding to the amplifying unit 13.

  The DA converter 213 DA-converts the digital signal on which distortion compensation processing corresponding to the amplification unit 13 has been performed, and outputs the digital signal to the excitation unit 217 corresponding to the amplification unit 13.

  The excitation unit 217 corresponding to the amplifying unit 13 excites the frequency of the analog signal that has been DA-converted to the frequency to be transmitted and outputs it to the corresponding amplifying unit 13.

  Further, the phase shift control unit 214 of the present embodiment acquires a time difference between the input signal and each monitor signal from the data acquisition unit 2113 and the data acquisition unit 2116 of the distortion compensation processing unit 211, and a plurality of times based on these time differences. A time lag in output of the amplifying units 12 and 13 is detected. The phase shift control unit 114 outputs to the DA converters 112 and 113 the phase shift control amount that eliminates this time lag in the instruction for phase shift control of the analog signal that has been DA converted.

  Next, the operation of this embodiment will be described. FIG. 4 is a flowchart illustrating operations of the data acquisition unit, the distortion component calculation unit, and the inverse characteristic application unit of FIG. As shown in FIG. 4, in the signal output method of the exciter of this embodiment, first, the data acquisition units 2113 and 2116 acquire monitor signal samples and modulation signal samples (step S11).

  The data acquisition units 2113 and 2116 determine the time difference between the monitor signal and the modulation signal (step S12). Then, the data acquisition units 2113 and 2116 output delayed modulation signal samples corresponding to the monitor signal samples (step S13).

  Next, the distortion component calculation units 2114 and 2117 calculate the nonlinear distortion component by comparing the monitor signal sample with the delayed modulation signal sample (step S14).

  Then, the inverse characteristic applying units 2115 and 2118 apply a component having the inverse characteristic of the calculated distortion component to the modulation signal and output a signal subjected to distortion compensation processing (step S15).

  FIG. 5 is a flowchart showing operations of the phase shift control unit, the reverse characteristic applying unit, and the DA converter of FIG. As shown in FIG. 5, when the inverse characteristic applying units 2115 and 2118 output the signals subjected to the distortion compensation processing to the DA converters 212 and 213, respectively, the DA converters 212 and 213 perform the distortion compensation processing. Each broken signal is D / A converted (step S16).

  Further, the phase shift control unit 214 acquires the time difference between the input signal from the data acquisition units 2113 and 2116 and the monitor signal from the monitors 14 and 15 (step S17). Then, the phase shift control unit 214 outputs to the DA converters 212 and 213 a phase shift control amount that eliminates the time lag of the outputs of the plurality of amplification units 12 and 13. For example, when the monitor signal corresponding to the amplification unit 13 has a smaller time difference from the input signal, the phase shift control unit 214 causes the DA converter 213 corresponding to the amplification unit 13 to delay by the difference in time difference. The phase control amount is output, and the phase shift control amount indicating that no phase shift is performed is output to the DA converter 212 corresponding to the amplification unit 12 (step S18).

  The DA converters 212 and 213 perform phase shift control on the analog signal obtained by DA conversion based on the instructed phase shift control amount, and output the analog signal (step S19).

  Also in the second embodiment described above, the plurality of DA converters 212 and 213 are caused to output the analog signals after the DA conversion by performing phase shift control. The deviation can be reduced, and the temporal deviation of the transmission signal that occurs when the amplifier is switched can be reduced.

  Next, a third embodiment will be described. FIG. 6 is a block diagram illustrating a configuration of the third embodiment. As shown in FIG. 6, the exciter 31 of the transmission device 3 of the third embodiment differs from the first and second embodiments in that the distortion compensation processing unit 311 includes an AD converter, a data acquisition unit, Only one distortion component calculation unit is provided. The exciter 31 includes a monitor selection unit 3111 that selects one of the monitor signals from the monitors 14 and 15 corresponding to the amplification units 12 and 13 and inputs the selected signal to the AD converter 3112.

  When the monitor selection unit 3111 selects a monitor signal from the monitor 14 corresponding to the amplification unit 12, the AD converter 3112 outputs a monitor signal sample obtained by sampling the monitor signal from the monitor 14.

  In this case, the data acquisition unit 3113 acquires a monitor signal sample obtained by sampling the monitor signal from the monitor 14 from the AD converter 3112 and acquires an input signal sample obtained by sampling the input signal output from the modulation unit 215. Then, the data acquisition unit 3113 determines the time difference between the monitor signal from the monitor 14 and the input signal from the monitor signal sample from the monitor 14 and the input signal sample. Further, the data acquisition unit 3113 outputs the input signal sample delayed corresponding to the monitor signal sample from the monitor 14 to the distortion component calculation unit 3114 together with the monitor signal sample from the monitor 14.

  The distortion component calculation unit 3114 calculates the distortion component by comparing the monitor signal sample acquired from the data acquisition unit 3113 and the delayed input signal sample, and outputs the distortion component to the inverse characteristic application unit 2115 corresponding to the amplification unit 12. The inverse characteristic application unit 2115 corresponding to the amplification unit 12 applies a component having the inverse characteristic of the calculated distortion component to the input signal output from the modulation unit 215. In this way, the inverse characteristic applying unit 2115 generates a digital signal on which distortion compensation processing corresponding to the amplification unit 12 has been performed, and outputs the digital signal to the DA converter 212 corresponding to the amplification unit 12.

  The DA converter 212 corresponding to the amplifying unit 12 DA-converts the digital signal subjected to the distortion compensation processing corresponding to the amplifying unit 12 and outputs the digital signal to the excitation unit 216 corresponding to the amplifying unit 12. The excitation unit 216 corresponding to the amplifying unit 12 excites the frequency of the analog signal that has been DA-converted to the frequency to be transmitted, and outputs it to the corresponding amplifying unit 12.

  On the other hand, when the monitor selection unit 3111 selects a monitor signal from the monitor 15 corresponding to the amplification unit 13, the AD converter 3112 outputs a monitor signal sample obtained by sampling the monitor signal from the monitor 15.

  In this case, the data acquisition unit 3113 acquires a monitor signal sample obtained by sampling the monitor signal from the monitor 15, and acquires an input signal sample obtained by sampling the input signal output from the modulation unit 215. Then, the data acquisition unit 3113 determines a time difference between the monitor signal from the monitor 15 and the input signal from the monitor signal sample and the input signal sample from the monitor 15. Further, the data acquisition unit 3113 outputs the input signal sample delayed corresponding to the monitor signal sample from the monitor 15 to the distortion component calculation unit 3114 together with the monitor signal sample from the monitor 15.

  The distortion component calculation unit 3114 compares the monitor signal sample acquired from the data acquisition unit 3113 with the delayed input signal sample, calculates a nonlinear distortion component, and outputs the nonlinear distortion component to the inverse characteristic application unit 2118 corresponding to the amplification unit 13. The inverse characteristic applying unit 2118 corresponding to the amplifying unit 13 applies the calculated inverse component of the distortion component to the input signal output from the modulating unit 215. In this way, the inverse characteristic applying unit 2118 generates the signal subjected to the distortion compensation process corresponding to the amplifying unit 13 and outputs the signal to the DA converter 213 corresponding to the amplifying unit 13.

  The DA converter 213 corresponding to the amplifying unit 13 DA-converts the digital signal subjected to the distortion compensation processing corresponding to the amplifying unit 13 and outputs the digital signal to the excitation unit 217 corresponding to the amplifying unit 13. The excitation unit 217 corresponding to the amplifying unit 13 excites the frequency of the analog signal that has been DA-converted to the frequency to be transmitted and outputs it to the corresponding amplifying unit 13.

  Next, the operation of this embodiment will be described. FIG. 7 is a flowchart showing the operations of the monitor selection unit, data acquisition unit, distortion component calculation unit, and inverse characteristic application unit of FIG. As shown in FIG. 7, in the exciter signal output method of the present embodiment, the monitor selection unit 3111 first selects one of the monitor signals from the monitors 14 and 15. For example, when the monitor selection unit 3111 selects a monitor signal from the monitor 14 corresponding to the amplification unit 12, the AD converter 3112 outputs a monitor signal sample obtained by sampling the monitor signal from the monitor 14 (step S21).

  The data acquisition unit 3113 receives a monitor signal sample obtained by sampling the monitor signal from the selected monitor 14, and an input signal sample obtained by sampling the input signal output from the modulation unit 215. The time difference is determined (step S22). The data acquisition unit 3113 outputs the input signal sample delayed corresponding to the monitor signal sample from the monitor 14 together with the monitor signal sample from the monitor 14 to the distortion component calculation unit 3114 (step S23).

  After step S24, the monitor selection unit 3111 switches the selection, next selects the monitor signal from the monitor 15 corresponding to the amplification unit 13, and the AD converter 3112 samples the monitor signal sample obtained by sampling the monitor signal from the monitor 15 Is output (step S24). The data acquisition unit 3113 receives the monitor signal from the monitor 15 and the input from the monitor signal sample obtained by sampling the monitor signal from the next selected monitor 15 and the input signal sample obtained by sampling the input signal output from the modulation unit 215. The time difference between the signals is determined (step S25). The data acquisition unit 3113 outputs the input signal sample delayed corresponding to the monitor signal sample from the monitor 15 to the distortion component calculation unit 3114 together with the monitor signal sample from the monitor 15 (step S26).

  On the other hand, after step S23, the distortion component calculation unit 3114 compares the monitor signal sample from the monitor 14 selected in step S21 with the delayed modulation signal sample in parallel with steps S25 and S26, and calculates a nonlinear distortion component. Calculate (step S27). Then, the inverse characteristic applying unit 2115 applies a component having the inverse characteristic of the calculated distortion component to the modulation signal and outputs a signal subjected to distortion compensation processing (step S28).

  The operations of the phase shift control unit, reverse characteristic application unit, and DA converter of this embodiment are the same as those of the second embodiment shown in FIG. As shown in FIG. 5, when the inverse characteristic applying units 2115 and 2118 output the signals subjected to the distortion compensation processing to the DA converters 212 and 213, respectively, the DA converters 212 and 213 perform the distortion compensation processing. Each broken signal is D / A converted (step S16). Further, the phase shift control unit 214 acquires the time difference between the input signal and the monitor signals from the monitors 14 and 15 (step S17).

  In step S17, in this embodiment, when the monitor selection unit 3111 selects a monitor signal from the monitor 14, the phase shift control unit 214 obtains a time difference between the input signal and the monitor signal from the monitor 14, and stores a memory (not shown). Save to. When the monitor selection unit 3111 selects a monitor signal from the monitor 15, the phase shift control unit 214 acquires the time difference between the input signal and the monitor signal from the monitor 15 and stores it in a memory (not shown). Therefore, in this embodiment, the phase shift control unit 214 acquires the time difference between the input signal and the monitor signals from the monitors 14 and 15 from the data acquisition unit 3113 and a memory (not shown).

  Then, the phase shift control unit 214 outputs to the DA converters 212 and 213 a phase shift control amount that eliminates the time lag. For example, when the time difference between the monitor signal corresponding to the amplifying unit 13 and the input signal is smaller than the monitor signal corresponding to the amplifying unit 12, the DA converter 213 corresponding to the amplifying unit 13 has the time difference from the input signal. A phase shift control amount that is delayed by the difference is output, and a phase shift control amount indicating that no phase shift is performed is output to the DA converter 212 corresponding to the amplifier unit 12 (step S18).

  The DA converters 212 and 213 perform phase shift control on the analog signal obtained by DA conversion based on the instructed phase shift control amount, and output the analog signal (step S19).

  Also in the third embodiment described above, similarly to the first and second embodiments, a plurality of DA converters 212 and 213 cause the DA converted analog signals to be phase-shifted and output, so that a plurality of DA converters 212 and 213 are output. The time lag of the outputs of the amplifying units 12 and 13 can be reduced, and the time lag of the transmission signal generated when the amplifying units are switched can be reduced.

  In the third embodiment, the distortion compensation processing unit includes one AD converter, a data acquisition unit, and a distortion component calculation unit, and a monitor selection unit that selects monitor signals from a plurality of monitors. Provided. In the third embodiment, the process of performing distortion compensation processing by comparing the selected monitor signal with the input signal and the process of acquiring the delayed input signal corresponding to the next selected monitor signal are performed in parallel. Done. With this configuration, the same effects as those of the first and second embodiments can be realized with a smaller configuration than the second embodiment including a plurality of data acquisition units and distortion component calculation units.

  Next, a fourth embodiment will be described. The fourth embodiment is an embodiment in which the exciter has a redundant configuration. FIG. 8 is a block diagram showing the configuration of the fourth embodiment.

  As shown in FIG. 8, the transmission device 4 according to the fourth embodiment includes a first number (two in FIG. 8) of exciters 41 and 42 and an input unit 43 that distributes input signals to the exciters 41 and 42. I have. Further, the transmission device 4 has a second number (four in FIG. 8) of amplifying units 44 and 45, which is a product of the number of exciters and the number of analog signals output by the exciters 41 and 42 (2 in FIG. 8). , 46, 47. The transmission device 4 branches the outputs of the amplifying units 44, 45, 46, and 47 and outputs the monitor signals 48, 49, 50, and 51, and outputs from the amplifying units 44, 45, 46, and 47, respectively. An output selection unit 52 for selection is provided.

  The exciters 41 and 42 divide the outputs of the amplifying units 44, 45, 46, and 47, respectively, and output digital signals that have been subjected to distortion compensation processing based on the monitor signals from the monitors 48, 49, 50, and 51 that output monitor signals. Distortion compensation processing units 411 and 421 are provided.

  The exciters 41 and 42 are provided corresponding to the amplification units 44, 45, 46, and 47, respectively, and include a plurality of DA converters 412, 413, 422, and 423 that DA-convert the digital signals subjected to distortion compensation processing. Yes.

  In addition, the exciters 41 and 42 include phase shift control units 414 and 424 that output instructions to the plurality of DA converters 412, 413, 422, and 423 for performing phase shift control of the analog signals that have been DA-converted. The phase shift control units 414 and 424, for example, a plurality of amplifying units 44 and 45 based on time differences between the input signals to the distortion compensation processing units 411 and 421 and the monitor signals detected by the distortion compensation processing units 411 and 421, for example. , 46 and 47 are detected as a time lag. Then, the phase shift control units 414 and 424 output instructions to the DA converters 412, 413, 422, and 423 to perform phase shift control of the analog signals that have been DA converted so as to reduce the detected time lag.

  For example, when the monitor signal from the monitor 48 corresponding to the amplifying unit 44 has the largest time difference from the input signal, the phase shift control units 414 and 424 are connected to the monitor signals from the monitors 49, 50, and 51 having a small time difference. The difference in time difference from the monitor signal from the monitor 48 is detected. The phase shift control units 414 and 424 output the phase shift control amounts for delaying the DA converters 413, 422, and 423 by the difference in the time difference, respectively. Outputs a phase shift control amount indicating that they are not in phase.

  The plurality of DA converters 412, 413, 422, and 423 are configured to reduce the time lag of signals input to the plurality of amplification units 44, 45, 46, 47 based on the phase shift control amount. The converted analog signal is phase-shifted and output.

  As described above, according to the configuration of the fourth embodiment, as in the first and second embodiments, the phase shift control units 414 and 424 are connected to the plurality of DA converters 412, 413, 422, and 423. The converted analog signal is subjected to phase shift control and output. Therefore, it is possible to reduce the time lag of the outputs of the plurality of amplifiers 44, 45, 46, and 47, and to reduce the time lag of the transmission signal generated when the amplifiers are switched.

  Further, according to the configuration of the fourth embodiment, since the output selection unit 52 that selects the output from the amplification units 44, 45, 46, 47 is provided, even if one of the exciters 41, 42 fails, The output selection unit 52 can select any one of the amplification units connected to other exciters that are not connected. Therefore, even when one of the exciters 41 and 42 breaks down, it is possible to continue the operation of the transmission apparatus having the amplification unit as a redundant configuration.

  Next, a fifth embodiment will be described. The fifth embodiment is another embodiment in which the exciter has a redundant configuration.

  FIG. 9 is a block diagram showing the configuration of the fifth embodiment. As illustrated in FIG. 9, the transmission device 5 according to the fifth embodiment includes a third number (two in FIG. 9) of exciters 61 and 62 and an input unit 63 that distributes an input signal to the exciters 61 and 62. I have. The transmission device 5 includes a fourth number (two in FIG. 9) of selection units 64 and 65 that are the number of analog signals output from the exciters 61 and 62, and the number of analog signals output from the exciters 61 and 62. A fourth number (two in FIG. 9) of amplifying units 66 and 67 that are the same number is provided. The transmission device 5 also includes monitors 68 and 69 for branching the outputs of the amplification units 66 and 67 and outputting monitor signals, and an output selection unit 70 for selecting the outputs from the amplification units 66 and 67, respectively.

  The selection units 64 and 65 are connected to the inputs of the amplification units 66 and 67, and one each of the plurality of analog signals output from the exciters 61 and 62 is input. That is, the selection units 64 and 65 select one of the exciters 61 and 62 and input one of the analog signals output from the exciter to the amplification units 66 and 67.

  The exciter 61 includes a distortion compensation processing unit 611 that outputs a digital signal that has been subjected to distortion compensation processing based on the monitor signals from the monitors 68 and 69 that branch the outputs of the amplification units 66 and 67 and output monitor signals. Yes. In addition, the exciter 62 includes a distortion compensation processing unit 621 that outputs a digital signal that has been subjected to distortion compensation processing based on the monitor signals from the monitors 68 and 69 that branch the outputs of the amplification units 66 and 67 and output monitor signals. ing.

  In addition, the exciter 61 includes a plurality of DA converters 612 and 613 that correspond to the plurality of amplification units 66 and 67, respectively, and perform DA conversion on the digital signals subjected to distortion compensation processing. In addition, the exciter 62 includes a plurality of DA converters 622 and 623 that respectively correspond to the plurality of amplifying units 66 and 67 and DA-convert digital signals that have been subjected to distortion compensation processing.

  In addition, the exciter 61 includes a phase shift control unit 614 that outputs an instruction to perform phase shift control of the DA signal converted to DA to the plurality of DA converters 612 and 613. In addition, the exciter 62 includes a phase shift control unit 624 that outputs an instruction to perform phase shift control on the analog signals after DA conversion to the plurality of DA converters 622 and 623.

  The phase shift control units 614 and 624, for example, a plurality of amplification units 66 and 67 based on the time difference between the input signals to the distortion compensation processing units 611 and 621 and the monitor signals detected by the distortion compensation processing units 611 and 621, for example. Detects the time lag of the output of. Then, the phase shift control units 614 and 624 output instructions to the DA converters 612, 613, 622, and 623 for performing phase shift control on the analog signals that have been DA-converted so as to reduce the detected time lag.

  The D / A converters 612, 613, 622, and 623 output the D / A converted analog signals by performing phase shift control so as to reduce the time lag of the outputs of the amplification units 66 and 67.

  According to the configuration of the fifth embodiment, similarly to the first and second embodiments, a plurality of DA converters 612, 613, 622, and 623 are caused to output a DA-converted analog signal by performing phase shift control. Therefore, it is possible to reduce the time lag of the outputs of the plurality of amplifiers 66 and 67, and to reduce the time lag of the transmission signal generated when the amplifiers are switched.

  The selection units 64 and 65 connected to the inputs of the plurality of amplification units 66 and 67 select one of the exciters even if one of the exciters fails, and select one of the analog signals output from the exciter. Input to the amplifying units 66 and 67. Therefore, even if the exciter fails, it is possible to continue the operation of the transmission apparatus having the redundant configuration of the amplification unit.

  Although the present invention has been described with reference to the embodiment, the present invention is not limited to the above embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

1, 2, 3, 4, 5 Transmitter 11, 21, 31 Exciter 12, 13 Amplifier 14, 15 Monitor 111, 211, 311 Distortion compensation processor 112, 113, 212, 213 DA converter 114, 214 Phase shift Control unit 215 Modulation unit 216, 217 Excitation unit 2111, 2112, 3112 AD converter 2113, 2116, 3113 Data acquisition unit 2114, 2117, 3114 Distortion component calculation unit 2115, 2118 Inverse characteristic application unit 3111 Monitor selection unit 41, 42 Exciter 43 Input unit 44, 45, 46, 47 Amplifying unit 48, 49, 50, 51 Monitor 52 Output selection unit 411, 421 Distortion compensation processing unit 412, 413, 422, 423 DA converter 414, 424 Phase shift control unit 61, 62 Exciter 63 Input section 64, 65 Select section 66, 67 Amplification 68, 69 monitor 70 output selection section 611 distortion compensation processing unit 612,613,622,623 DA converter 614, 624 phase shift control unit

Claims (8)

A plurality of amplification units;
A plurality of monitors for branching the outputs of the plurality of amplification units and outputting monitor signals;
An output selection unit for selecting outputs from the plurality of amplification units;
An exciter that outputs a plurality of analog signals subjected to distortion compensation processing corresponding to the plurality of amplification units;
Have
The exciter is
A distortion compensation processing unit that outputs a digital signal subjected to distortion compensation processing based on the plurality of monitor signals to an input signal;
A plurality of DA converters each corresponding to the plurality of amplifying units and configured to perform DA (Digital Analog) conversion of the digital signals subjected to the distortion compensation processing;
A phase shift control unit that outputs an instruction to perform phase shift control of the analog signals that have been DA converted to the plurality of DA converters;
A transmission apparatus having The distortion compensation processing unit determines a time difference between the input signal and the plurality of monitor signals,
The phase shift control unit detects a time lag in the outputs of the plurality of amplification units based on a time difference between the input signal and the plurality of monitor signals, and shifts to eliminate the time lag in the instruction. Output to the plurality of DA converters including the phase control amount,
The transmission device according to claim 1.   The transmission apparatus according to claim 1, wherein the exciter includes a monitor selection unit that selects one of the plurality of monitor signals.   The transmission apparatus according to claim 3, wherein the monitor selection unit switches selection of the monitor signal when acquiring a monitor signal sample and an input signal sample corresponding to the monitor signal sample for one of the selected monitor signals. In an exciter that generates a plurality of analog signals respectively output to a plurality of amplification units,
A distortion compensation processing unit that outputs a digital signal subjected to distortion compensation processing based on monitor signals output from the plurality of amplification units to an input signal;
A plurality of D / A converters that D / A convert the digital signals that are respectively provided corresponding to the plurality of amplification units and that have undergone the distortion compensation processing;
A phase shift control unit that outputs an instruction to perform phase shift control of the analog signals that have been DA converted to the plurality of DA converters;
Exciter with A first number of exciters according to claim 5;
An input for distributing input signals to said first number of exciters;
A second number of amplifying units that is the product of the first number and the number of analog signals;
The second number of monitors for branching the outputs of the second number of amplifying units and outputting monitor signals;
An output selection unit for selecting an output from the second number of amplification units;
A transmission apparatus having A third number of exciters according to claim 5;
An input for distributing an input signal to said third number of exciters;
A fourth number of amplifying units equal in number to the plurality of analog signals;
The fourth number of selection units connected to the input of the fourth number of amplification units and receiving one analog signal from the plurality of analog signals output from the third number of exciters; ,
The fourth number of monitors for branching the outputs of the fourth number of amplifying units and outputting monitor signals;
An output selection unit for selecting an output from the fourth number of amplification units;
A transmission apparatus having In an exciter signal output method for generating a plurality of analog signals respectively output to a plurality of amplification units,
Output a digital signal that has been subjected to distortion compensation processing based on a plurality of monitor signals each branched from the output from the plurality of amplifiers to the input signal,
Each of the signals subjected to the distortion compensation processing is D / A converted,
Outputs an instruction to control the phase of each of the DA-converted signals based on the monitor signal;
Signal output method.

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