JP7081269B2 - Transmitter, exciter and signal output method - Google Patents

Description

The present art relates to a transmitter, an exciter and a signal output method, and more particularly to a redundant transmitter, an exciter and a signal output method.

A transmitter with a redundant configuration is provided with multiple amplification units, and when an abnormality occurs in one of the amplification units, the input signal is amplified and output using the other amplification unit that is operating normally. A configuration that switches the connection to is used.

The 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 are configured to distribute and output each of the plurality of input signals to a plurality of output lines. ing. Further, a plurality of first amplification units are provided on each of the plurality of first output lines corresponding to one first input signal among the plurality of input signals, and a plurality of units corresponding to the second input signals other than the first input signal are provided. A second amplification unit is provided in at least one of the second output lines of the above. When an abnormality occurs in a plurality of first amplification 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 amplification unit. Switch the output line so that it is done.

Further, in general, a device called an exciter is connected to the front stage of a plurality of amplification units in order to generate an input signal to the amplification unit. The exciter is an exciter that converts the frequency of the input signal. It compares the signal that monitors the output of the amplification unit with the input signal, adds the reverse characteristic of the non-linear characteristics of the amplification unit to the input signal, and adds it to the amplification unit. It has a function to compensate for the non-linear characteristics of the amplification unit by outputting.

A related transmitter is disclosed, for example, in Patent Document 2. In the transmitting device of Patent Document 2, a configuration that enables distortion compensation of a plurality of transmitting units by using one feedback unit is disclosed. In the transmission device of Patent Document 2, the output signal of the transmission data generation unit is input to the distortion compensation calculation unit via the selection means. 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 into a digital signal, and input to the distortion compensation calculation unit. The distortion compensation calculation unit compares the amplitude and phase shift of 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 to obtain the compensation coefficient. .. The obtained compensation coefficient is given to the amplitude / phase shift correction unit via the selection means, and the distortion compensation processing of the transmission signal is performed.

Japanese Unexamined Patent Publication No. 2015-231122 Japanese Unexamined Patent Publication No. 2006-094043

In the configuration disclosed in Patent Document 2, even if the same transmission data is distributed and input to a plurality of amplitude / phase shift correction units, the amplitude / phase shift correction unit performs distortion compensation processing for the transmission signal. The phase shifts of the output signals are not always the same. Therefore, when switching between a plurality of amplification units having a redundant configuration, there is a possibility that a time lag may occur in the transmitted signal. A configuration that solves the above problems is not disclosed in Patent Document 1.

An 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 a transmission signal generated when a plurality of amplification units are switched in a transmission device having a redundant configuration.

The transmission device according to one aspect of the present invention selects a plurality of amplification units, a plurality of monitors that branch off the outputs of the plurality of amplification units to output monitor signals, and outputs from the plurality of amplification units. It has an output selection unit 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, and the exciter distorts the input signal based on the plurality of monitor signals. A distortion compensation processing unit that outputs a compensation-processed digital signal, and a plurality of DA converters that are provided corresponding to the plurality of amplification units and that perform DA (Digital Analog) conversion of the distortion-compensated digital signal. The plurality of DA converters have a phase shift control unit that outputs an instruction to control the phase shift of the DA-converted analog signal.

Further, the exciter according to another aspect of the present invention is an exciter that generates a plurality of analog signals output to each of the plurality of amplification units, and the input signal is distorted based on the monitor signals of the outputs of the plurality of amplification units. A distortion compensation processing unit that outputs a processed digital signal, a plurality of DA converters that are provided corresponding to the plurality of amplification units and that perform DA conversion of the distortion compensation processed digital signal, and the above-mentioned It has a phase shift control unit that outputs an instruction to control the phase shift of the DA-converted analog signal to a plurality of DA converters.

Further, the signal output method according to still another aspect of the present invention is a signal output method of an exciter that generates a plurality of analog signals output to a plurality of amplification units, respectively, and outputs the input signal from the plurality of amplification units. A digital signal subjected to distortion compensation processing is output based on a plurality of monitor signals branched from each other, the signal subjected to the distortion compensation processing is DA-converted, and the DA-converted signal is obtained based on the monitor signal. Is output as an instruction to control the phase shift.

According to the above aspect of the present invention, in the redundant transmission device, the time lag of the transmission signal generated when the plurality of amplification units are switched can be reduced.

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 showing the operation of the data acquisition unit, the strain component calculation unit, and the inverse characteristic application unit of FIG. FIG. 5 is a flowchart showing the operation of the phase shift control unit, the inverse characteristic application unit, and the DA converter of FIG. FIG. 6 is a block diagram showing the configuration of the third embodiment. FIG. 7 is a flowchart showing the operation 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 shown in FIG. 1, the transmission device 1 of the present embodiment is an exciter that outputs a plurality of amplification units 12 and 13 and 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. Further, the transmission device 1 has a plurality of monitors 14 and 15 that branch off the outputs of the plurality of amplification units 12 and 13 to output monitor signals, and an output selection unit 16 that selects outputs from the plurality of amplification units 12 and 13. And have.

The exciter 11 performs distortion compensation processing for compensating the distortion due to the non-linear characteristics of the amplification units 12 and 13 on the input input signal based on the plurality of monitor signals from the plurality of monitors 14 and 15, and the distortion compensation processing. The distortion compensation processing unit 111 for outputting the digital signal is provided. Further, the exciter 11 is provided with a plurality of DA converters 112 and 113 corresponding to the plurality of amplification units 12 and 13, respectively, to convert a distortion-compensated digital signal into DA (Digital Analog). Further, the exciter 11 includes a phase shift control unit 114 that outputs an instruction to control the phase shift of the DA-converted analog signal to the plurality of DA converters 112 and 113.

The phase shift control unit 114, for example, detects a time difference between the outputs of the plurality of amplification 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. Is detected, and the above 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 distortion-compensated digital signal corresponding to the amplification unit 12 to the DA converter 112 corresponding to the amplification unit 12, and the distortion-compensated digital signal corresponding to the amplification unit 13. Is output to the DA converter 113 corresponding to the amplification unit 13 (step S1).

The DA converters 112 and 113 perform DA conversion of 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 plurality of amplification units 12 and 13 based on the monitor signals of the amplification 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 strain compensation processing unit 111 and each monitor signal detected by the strain compensation processing unit 111 from the distortion compensation processing unit 111, and a plurality of them based on this time difference. The time lag of the outputs of the amplification units 12 and 13 of the above 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 phase-shift control and output the DA-converted analog signal so as to reduce the time lag between the outputs of the plurality of amplification units 12 and 13 (step S3).

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

There is a possibility that there may be a time lag in the signals that have been subjected to distortion compensation processing and are output from the distortion compensation processing unit 111. According to the configuration of the present embodiment, since the DA-converted analog signals are phase-shift controlled and output by the plurality of DA converters 112 and 113, the time lag between the outputs of the plurality of amplification units 12 and 13 is increased. Can be reduced. Therefore, according to the present embodiment, the time lag of the transmission signal generated when the amplification unit is switched can be reduced.

Next, the second embodiment will be described. FIG. 3 is a block diagram showing the configuration of the second embodiment. As shown in FIG. 3, the exciter 21 of the transmission device 2 of the second embodiment has an AD (Analog Digital) converter 2111 and 2112 for sampling monitor signals from monitors 14 and 15 in a distortion compensation processing unit 211. , The data acquisition units 2113 and 2116 corresponding to the amplification units 12 and 13, the strain component calculation units 2114 and 2117, and the inverse characteristic application units 2115 and 2118 are provided. Further, the exciter 21 includes a modulation unit 215 and an excitation unit 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 modulator unit 215. do. The data acquisition unit 2113 corresponding to the amplification unit 12 determines the time difference between the monitor signal and the input signal from the monitor 14 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 compares the monitor signal sample acquired from the data acquisition unit 2113 with the delayed input signal sample, calculates the nonlinear distortion component, and outputs the non-linear distortion component to the inverse characteristic application unit 2115 corresponding to the amplification unit 12.

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

The DA converter 212 DA-converts the digital signal subjected to the distortion compensation processing corresponding to the amplification unit 12 and outputs the digital signal to the excitation unit 216 corresponding to the amplification unit 12.

The excitation unit 216 corresponding to the amplification unit 12 excites the frequency of the DA-converted analog signal to a frequency to be transmitted and outputs the frequency to the corresponding amplification 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 the input signal sampled from 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 and the input signal from the monitor 15 from the monitor signal sample and the input signal sample from the monitor 15. 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 the 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 the calculated inverse characteristic component of the distortion component to the input signal output from the modulation unit 215. In this way, the inverse characteristic application unit 2118 corresponding to the amplification unit 13 generates a digital signal to which the distortion compensation processing corresponding to the amplification unit 13 has been performed, and outputs the digital signal to the DA converter 213 corresponding to the amplification unit 13.

The DA converter 213 DA-converts the digital signal subjected to the distortion compensation processing corresponding to the amplification unit 13 and outputs the digital signal to the excitation unit 217 corresponding to the amplification unit 13.

The excitation unit 217 corresponding to the amplification unit 13 excites the frequency of the DA-converted analog signal to a frequency to be transmitted and outputs the frequency to the corresponding amplification unit 13.

Further, the phase shift control unit 214 of the present embodiment acquires the 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 time differences are obtained based on these time differences. The time lag of the outputs of the amplification units 12 and 13 is detected. The phase shift control unit 114 outputs the DA-converted analog signal to the DA converters 112 and 113 including the phase shift control amount for eliminating the time lag in the instruction for phase shift control.

Next, the operation of this embodiment will be described. FIG. 4 is a flowchart showing the operation of the data acquisition unit, the strain 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 the present embodiment, first, the data acquisition units 2113 and 2116 acquire the monitor signal sample and the modulated signal sample (step S11).

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

Next, the strain component calculation units 2114 and 2117 compare the monitor signal sample with the delayed modulation signal sample to calculate the nonlinear strain component (step S14).

Then, the inverse characteristic application units 2115 and 2118 apply the calculated inverse characteristic component of the strain component to the modulation signal and output the signal to which the strain compensation processing is performed (step S15).

FIG. 5 is a flowchart showing the operation of the phase shift control unit, the inverse characteristic application unit, and the DA converter of FIG. As shown in FIG. 5, when the reverse characteristic application units 2115 and 2118 output the strain-compensated signals to the DA converters 212 and 213, respectively, the DA converters 212 and 213 perform the distortion compensation processing. DA conversion is performed for each of the transmitted signals (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, respectively, from the data acquisition units 2113 and 2116 (step S17). Then, the phase shift control unit 214 outputs to the DA converter 212 and 213 a phase shift control amount that eliminates the time lag between 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 delays the monitor signal corresponding to the amplification unit 13 to the DA converter 213 by the difference in time difference. The phase control amount is output, and the phase shift control amount indicating that the phase is not transferred is output to the DA converter 212 corresponding to the amplification unit 12 (step S18).

The DA converters 212 and 213 output the DA-converted analog signal under phase shift control based on the instructed phase shift control amount (step S19).

Also in the second embodiment described above, since the plurality of DA converters 212 and 213 are controlled to shift the phase of the DA-converted analog signal and output, the outputs of the plurality of amplification units 12 and 13 are temporally output. The deviation can be reduced, and the temporal deviation of the transmission signal generated when the amplification unit is switched can be reduced.

Next, a third embodiment will be described. FIG. 6 is a block diagram showing the configuration of the third embodiment. As shown in FIG. 6, the exciter 31 of the transmission device 3 of the third embodiment is different from the first and second embodiments in that the strain compensation processing unit 311 includes an AD converter, a data acquisition unit, and the data acquisition unit. It has only one distortion component calculation unit. Further, 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, respectively, and inputs the monitor signals to the AD converter 3112.

When the monitor selection unit 3111 selects the 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 modulator 215. Then, the data acquisition unit 3113 determines the time difference between the monitor signal and the input signal from the monitor 14 from the monitor signal sample and the input signal sample from the monitor 14. Further, the data acquisition unit 3113 outputs the delayed input signal sample 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 compares the monitor signal sample acquired from the data acquisition unit 3113 with the delayed input signal sample, calculates the distortion component, 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 the calculated inverse characteristic component of the distortion component to the input signal output from the modulation unit 215. In this way, the inverse characteristic application unit 2115 generates a digital signal to which distortion compensation processing is performed corresponding to the amplification unit 12, and outputs the digital signal to the DA converter 212 corresponding to the amplification unit 12.

The DA converter 212 corresponding to the amplification unit 12 DA-converts the digital signal subjected to the distortion compensation processing corresponding to the amplification unit 12 and outputs the digital signal to the excitation unit 216 corresponding to the amplification unit 12. The excitation unit 216 corresponding to the amplification unit 12 excites the frequency of the DA-converted analog signal to a frequency to be transmitted and outputs the frequency to the corresponding amplification unit 12.

On the other hand, when the monitor selection unit 3111 selects the 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 that samples the monitor signal from the monitor 15, and acquires an input signal sample that samples the input signal output from the modulation unit 215. Then, the data acquisition unit 3113 determines the time difference between the monitor signal and the input signal from the monitor 15 from the monitor signal sample and the input signal sample from the monitor 15. Further, the data acquisition unit 3113 outputs the delayed input signal sample 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 the nonlinear distortion component, and outputs it to the inverse characteristic application unit 2118 corresponding to the amplification unit 13. The inverse characteristic application unit 2118 corresponding to the amplification unit 13 applies the calculated inverse characteristic component of the distortion component to the input signal output from the modulation unit 215. In this way, the reverse characteristic application unit 2118 reverse characteristic application unit 2118 generates a signal to which the strain compensation processing corresponding to the amplification unit 13 has been performed, and outputs the signal to the DA converter 213 corresponding to the amplification unit 13.

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

Next, the operation of this embodiment will be described. FIG. 7 is a flowchart showing the operation of the monitor selection unit, the data acquisition unit, the strain component calculation unit, and the inverse characteristic application unit of FIG. As shown in FIG. 7, in the signal output method of the exciter 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 the monitor signal and the input signal from the monitor 14 from the monitor signal sample obtained by sampling the monitor signal from the selected monitor 14 and the input signal sample obtained by sampling the input signal output from the modulator 215. The time difference is determined (step S22). The data acquisition unit 3113 outputs the delayed input signal sample 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 (step S23).

After step S24, the monitor selection unit 3111 switches the selection, then selects the monitor signal from the monitor 15 corresponding to the amplification unit 13, and the AD converter 3112 samples the monitor signal from the monitor 15. Is output (step S24). The data acquisition unit 3113 inputs the monitor signal from the monitor 15 from the monitor signal sample sampled from the monitor signal from the next selected monitor 15 and the input signal sample sampled from the input signal output from the modulation unit 215. The time difference of the signal is determined (step S25). The data acquisition unit 3113 outputs the delayed input signal sample 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 to obtain a non-linear distortion component. Calculate (step S27). Then, the inverse characteristic application unit 2115 applies the calculated inverse characteristic component of the strain component to the modulation signal and outputs the signal to which the strain compensation processing is performed (step S28).

The operation of the phase shift control unit, the reverse characteristic application unit, and the DA converter of this embodiment is the same as that of the second embodiment shown in FIG. As shown in FIG. 5, when the reverse characteristic application units 2115 and 2118 output the strain-compensated signals to the DA converters 212 and 213, respectively, the DA converters 212 and 213 perform the distortion compensation processing. DA conversion is performed for each of the transmitted signals (step S16). Further, the phase shift control unit 214 acquires the time difference between the input signal and the monitor signal from the monitors 14 and 15 (step S17).

In step S17, in the present embodiment, when the monitor selection unit 3111 selects the monitor signal from the monitor 14, the phase shift control unit 214 acquires the time difference between the input signal and the monitor signal from the monitor 14, and is a memory (not shown). Save to. Further, when the monitor selection unit 3111 selects the 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 the present 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 the memory (not shown).

Then, the phase shift control unit 214 outputs the phase shift control amount for eliminating the time lag to the DA converters 212 and 213. For example, when the monitor signal corresponding to the amplification unit 13 has a smaller time difference from the input signal than the monitor signal corresponding to the amplification unit 12, the DA converter 213 corresponding to the amplification unit 13 has a time difference from the input signal. The phase shift control amount delayed by the difference is output, and the phase shift control amount indicating that the phase is not shifted is output to the DA converter 212 corresponding to the amplification unit 12 (step S18).

The DA converters 212 and 213 output the DA-converted analog signal under phase shift control based on the instructed phase shift control amount (step S19).

Also in the third embodiment described above, as in the first and second embodiments, the plurality of DA converters 212 and 213 are controlled to shift the phase of the DA-converted analog signal and output. The time lag between the outputs of the amplification units 12 and 13 can be reduced, and the time lag of the transmission signal generated when the amplification units are switched can be reduced.

Further, in the third embodiment, the distortion compensation processing unit is provided with an AD converter, a data acquisition unit, and a distortion component calculation unit, respectively, and has a monitor selection unit that selects monitor signals from a plurality of monitors. Be prepared. Further, in the third embodiment, the process of comparing the selected monitor signal and the input signal to perform distortion compensation processing and the process of acquiring the delayed input signal corresponding to the next selected monitor signal are performed in parallel. Is done. With this configuration, the same effect as that of the first and second embodiments can be realized with a configuration smaller than that of the second embodiment including a plurality of data acquisition units and a plurality of strain 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 of the fourth embodiment includes the exciters 41 and 42 of the first number (two in FIG. 8) and the input unit 43 that distributes the input signal to the exciters 41 and 42. I have. Further, the transmitter 4 is an amplification unit 44, 45 of a second number (4 units in FIG. 8), which is the product of the number of exciters and the number of analog signals output by the exciters 41, 42 (2 in FIG. 8). , 46, 47. Further, the transmission device 4 branches the outputs of the amplification units 44, 45, 46, 47, respectively, and outputs the monitor signals to the monitors 48, 49, 50, 51, and the outputs from the amplification units 44, 45, 46, 47. The output selection unit 52 for selection is provided.

The exciter 41, 42 splits the outputs of the amplification units 44, 45, 46, and 47, respectively, and outputs a monitor signal. The distortion compensation processing units 411 and 421 for output are provided.

Further, the exciters 41 and 42 are provided corresponding to the amplification units 44, 45, 46, 47, respectively, and are provided with a plurality of DA converters 412, 413, 422, and 423 that perform DA conversion of the distortion-compensated digital signal. There is.

Further, the exciters 41 and 42 include phase shift control units 414 and 424 that output instructions for phase shift control of the DA converted analog signal to the plurality of DA converters 412, 413, 422, and 423. The phase shift control units 414 and 424 have, for example, a plurality of amplification units 44 and 45 based on the time difference between the input signal to the distortion compensation processing units 411 and 421 and each monitor signal detected by the distortion compensation processing units 411 and 421. , 46, 47 detect the time lag of the output. Then, the phase shift control unit 414, 424 outputs an instruction to control the phase shift of the DA-converted analog signal so as to reduce the detected time lag to the DA converters 412, 413, 422, 423.

For example, when the monitor signal from the monitor 48 corresponding to the amplification unit 44 has the largest time difference from the input signal, the phase shift control unit 414, 424 and the monitor signal from the monitors 49, 50, 51 having a small time difference , The difference in the time difference from the monitor signal from the monitor 48 is detected. The phase shift control unit 414, 424 outputs a phase shift control amount to be delayed by the difference in the above time difference to the DA converters 413, 422, and 423, and transfers the phase shift control amount to the DA converter 212 corresponding to the amplification unit 44. The phase shift control amount indicating that they are incompatible is output.

The plurality of DA converters 412, 413, 422, and 423 reduce the time lag of the signals input to the plurality of amplification units 44, 45, 46, 47 based on the above-mentioned phase shift control amount. The converted analog signal is phase-shift controlled 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 by DA. The converted analog signal is phase-shift controlled and output. Therefore, the time lag between the outputs of the plurality of amplification units 44, 45, 46, and 47 can be reduced, and the time lag of the transmission signal generated when the amplification units are switched can be reduced.

Further, according to the configuration of the fourth embodiment, since the output selection unit 52 for selecting the output from the amplification units 44, 45, 46, 47 is provided, even if one of the exciters 41, 42 fails, the failure occurs. The output selection unit 52 can select any of the amplification units connected to other exciters that have not been installed. Therefore, even if one of the exciters 41 and 42 fails, it is possible to continue the operation of the transmission device having a redundant configuration of the amplification unit.

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 shown in FIG. 9, the transmission device 5 of the fifth embodiment has an exciter 61, 62 of a third number (two in FIG. 9) and an input unit 63 for distributing an input signal to the exciter 61, 62. I have. Further, the transmission device 5 includes selection units 64 and 65 of a fourth number (two in FIG. 9), which is the number of analog signals output by the exciters 61 and 62, and the number of analog signals output by the exciters 61 and 62. It is provided with a fourth number (two in FIG. 9) amplification units 66 and 67, which are the same number. Further, the transmission device 5 includes monitors 68 and 69 that branch off the outputs of the amplification units 66 and 67 to output monitor signals, and an output selection unit 70 that selects 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 of 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 distorted compensated based on the monitor signals from the monitors 68 and 69 that branch the outputs of the amplification units 66 and 67 and output the monitor signals, respectively. There is. Further, the exciter 62 includes a distortion compensation processing unit 621 that outputs a digital signal that has been distorted compensated based on the monitor signals from the monitors 68 and 69 that branch the outputs of the amplification units 66 and 67 and output the monitor signals, respectively. ing.

Further, the exciter 61 is provided with a plurality of DA converters 612 and 613 corresponding to the plurality of amplification units 66 and 67, respectively, to perform DA conversion of the distortion-compensated digital signal. Further, the exciter 62 includes a plurality of DA converters 622 and 623 that are provided corresponding to the plurality of amplification units 66 and 67 and that perform DA conversion of the distortion-compensated digital signal.

Further, the exciter 61 includes a plurality of DA converters 612 and 613 with a phase shift control unit 614 for outputting an instruction to control the phase shift of the DA-converted analog signal. Further, the exciter 62 includes a plurality of DA converters 622 and 623 with a phase shift control unit 624 that outputs an instruction to control the phase shift of the DA-converted analog signal.

The phase shift control units 614 and 624 have a plurality of amplification units 66 and 67 based on the time difference between the input signal to the distortion compensation processing units 611 and 621 and each monitor signal 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 to control the phase shift of the DA-converted analog signal so as to reduce the detected time lag.

The DA converters 612, 613, 622, and 623 output the DA-converted analog signal under 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, as in the first and second embodiments, the plurality of DA converters 612, 613, 622, and 623 are phase-shift controlled to output the DA-converted analog signal. Therefore, the time lag between the outputs of the plurality of amplification units 66 and 67 can be reduced, and the time lag of the transmission signal generated when the amplification units are switched can be reduced.

Further, even if one of the exciters fails, the selection units 64 and 65 connected to the inputs of the plurality of amplification units 66 and 67 select the other exciter and output one of the analog signals from the exciter. Inputs are made to the amplification units 66 and 67. Therefore, even if the exciter fails, it is possible to continue the operation of the transmission device having a redundant configuration of the amplification unit.

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

1, 2, 3, 4, 5 Transmitters 11, 21, 31 Exciters 12, 13 Amplifiers 14, 15 Monitors 111, 211, 311 Distortion compensation processing units 112, 113, 212, 213 DA converters 114, 214 Phase shifts 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 Amplification 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 unit 64, 65 Selection unit 66, 67 Amplification unit 68, 69 Monitor 70 Output selection unit 611, 621 Distortion compensation processing unit 612, 613, 622, 623 DA converter 614, 624 Phase shift control unit

Claims (7)

With multiple amplification units
A plurality of monitors that branch off the outputs of the plurality of amplification units and output monitor signals, and
An output selection unit that selects outputs from the plurality of amplification units, and an output selection unit.
An exciter that outputs a plurality of analog signals that have been subjected to distortion compensation processing corresponding to the plurality of amplification units, and
Have,
The exciter is
A distortion compensation processing unit that outputs a digital signal that has been subjected to distortion compensation processing based on the plurality of monitor signals as an input signal, and a distortion compensation processing unit.
A plurality of DA converters that are provided corresponding to the plurality of amplification units and that perform DA (Digital Analog) conversion of the digital signal subjected to the distortion compensation processing.
The plurality of DA converters have a phase shift control unit for outputting an instruction to control the phase shift of the DA-converted analog signal.
The distortion compensation processing unit determines the time difference between the input signal and the plurality of monitor signals, respectively, and determines the time difference between the input signal and the plurality of monitor signals.
The phase shift control unit detects a time lag between the outputs of the plurality of amplification units based on the time difference between the input signal and the plurality of monitor signals, and eliminates the time lag with the instruction. Output to the plurality of DA converters including the phase control amount,
Transmitter . The transmission device according to claim 1 , wherein the exciter has a monitor selection unit that selects one of the plurality of monitor signals. The transmission device according to claim 2 , wherein the monitor selection unit switches the selection of the monitor signal when the monitor signal sample and the input signal sample corresponding to the monitor signal sample are acquired for one of the selected monitor signals. In an exciter that generates multiple analog signals that are output to multiple amplification units, respectively.
A distortion compensation processing unit that outputs a digital signal that has been subjected to distortion compensation processing based on the monitor signals of the outputs of the plurality of amplification units as an input signal, and a distortion compensation processing unit.
A plurality of DA converters that are provided corresponding to the plurality of amplification units and that perform DA conversion of the digital signal subjected to the distortion compensation processing, and a plurality of DA converters.
The plurality of DA converters have a phase shift control unit for outputting an instruction to control the phase shift of the DA-converted analog signal.
The strain compensation processing unit is
The time difference between the input signal and the plurality of monitor signals is determined, respectively.
The phase shift control unit is
The time difference between the outputs of the plurality of amplification units is detected based on the time difference between the input signal and the plurality of monitor signals, and the instruction includes a phase shift control amount for eliminating the time difference. Output to multiple DA converters,
Exciter . The first number of exciters according to claim 4 is provided.
An input unit that distributes the input signal to the first number of exciters,
A second number amplification unit, which is the product of the first number and the number of the plurality of analog signals,
The second number of monitors that branch off the output of the second number of amplification units and output the monitor signal, and the second number of monitors.
An output selection unit that selects the output from the second number of amplification units, and an output selection unit.
Transmitter with. The third number of exciters according to claim 4 is provided.
An input unit that distributes the input signal to the third number of exciters,
A fourth number of amplification units, which is the same number as the plurality of analog signals,
With the selection unit of the fourth number connected to the input of the amplification unit of the fourth number and inputting one analog signal from the plurality of analog signals output from the exciter of the third number. ,
The fourth number of monitors that branch off the output of the fourth number of amplification units and output the monitor signal, and the fourth number of monitors.
An output selection unit that selects the output from the fourth number of amplification units, and an output selection unit.
Transmitter with. In the signal output method of the exciter that generates a plurality of analog signals output to a plurality of amplification units, respectively.
A digital signal subjected to distortion compensation processing based on a plurality of monitor signals obtained by branching the outputs from the plurality of amplification units to the input signal is output.
Each of the signals subjected to the distortion compensation processing is DA-converted, and the signals are subjected to DA conversion.
The time difference between the input signal and the plurality of monitor signals is determined, respectively.
A time lag between the outputs of the plurality of amplification units is detected based on the time difference between the input signal and the plurality of monitor signals.
An instruction to control the phase shift of each of the DA-converted signals including the phase shift control amount for eliminating the time lag is output.
Signal output method.

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