Communication system, processing method, and program

Abstract

To provide a communication system capable of appropriately adjusting the shape of a spurious spectrum that changes depending on the situation without a user being aware of it.SOLUTION: A communication system is provided, comprising a comparison unit for comparing a power spectrum of a periodically transmitted pulse signal with given reference values, and an adjustment unit for adjusting an amplitude of the pulse signal when the power spectrum is outside a range of the given reference values according to a comparison result of the comparison unit.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present disclosure relates to a communication system, a processing method, and a program. [Background technology]

[0002] Communication services are used in a variety of fields. Patent Document 1 discloses a related technology relating to a radar device that can emit only pulse signals that satisfy desired characteristics and thus strictly comply with regulations on unwanted radiation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-052515 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology relating to the transmission of pulse signals related to Patent Document 1, there is a demand for a technology that can appropriately adjust the shape of spurious signals that change depending on the situation without the user being aware of it.

[0005] Each aspect of the present disclosure aims to provide a communication system, a processing method, and a program that can solve the above-mentioned problems. [Means for solving the problem]

[0006] According to one aspect of the present disclosure, a communication system includes a comparison unit that compares the power spectrum of a periodically transmitted pulse signal with a predetermined reference value, and an adjustment unit that adjusts the amplitude of the pulse signal based on the comparison result by the comparison unit if the power spectrum is outside the range of the predetermined reference value.

[0007] According to another aspect of the present disclosure, a processing method includes comparing a power spectrum of a periodically transmitted pulsed signal with a predetermined reference value, and adjusting an amplitude of the pulsed signal based on a comparison result if the power spectrum is outside a range of the predetermined reference value.

[0008] According to another aspect of the present disclosure, a program causes a computer to compare a power spectrum of a periodically transmitted pulse signal with a predetermined reference value, and adjust the amplitude of the pulse signal based on a comparison result if the power spectrum is outside a range of the predetermined reference value. [Effects of the Invention]

[0009] According to each aspect of the present disclosure, it is possible to appropriately adjust the shape of spurious signals that change depending on the situation without the user being aware of it. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram illustrating an example of a configuration of a communication system according to some embodiments of the present disclosure. [Figure 2] FIG. 1 is a diagram illustrating an example of a processing flow of a communication system according to some embodiments of the present disclosure. [Figure 3] FIG. 1 illustrates an example of a spectral mask according to some embodiments of the present disclosure. [Figure 4] FIG. 10 illustrates an example of rise / fall times according to some embodiments of the present disclosure. [Figure 5] FIG. 2 illustrates an example of a signal divided into multiple equally spaced time intervals in accordance with some embodiments of the present disclosure. [Figure 6] FIG. 10 illustrates an example of a Fourier transform result according to some embodiments of the present disclosure. [Figure 7] FIG. 10 is a diagram illustrating an example of a relationship between a power spectrum and a spectrum mask according to some embodiments of the present disclosure. [Figure 8]FIG. 2 illustrates an example of a signal generated by a signal coupler according to some embodiments of the present disclosure. [Figure 9] FIG. 2 illustrates an example of a signal output by a low-pass filter according to some embodiments of the present disclosure. [Figure 10] FIG. 10 is a diagram illustrating an example of a signal output by an amplitude adjuster according to some embodiments of the present disclosure. [Figure 11] FIG. 10 is a diagram illustrating an example of a configuration of a communication system according to another embodiment of the present disclosure. [Figure 12] FIG. 10 is a diagram illustrating an example of a processing flow of a communication system according to another embodiment of the present disclosure. [Figure 13] FIG. 1 is a schematic block diagram illustrating the configuration of a computer according to at least one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, the embodiments will be described in detail with reference to the drawings. <Embodiment> (Communication System Configuration) A communication system 1 according to an embodiment of the present disclosure will be described with reference to the drawings. The communication system 1 is a system that can appropriately adjust the shape of spurious signals that change depending on the situation without the user being aware of it.

[0012] 1 is a diagram illustrating an example of a configuration of a communication system 1 according to some embodiments of the present disclosure. As shown in FIG. 1, the communication system 1 includes a signal generating device 10, an amplifying device 20, a receiving device 30, and an analyzing device 40.

[0013] 1, the signal generating device 10 includes a section signal generator 101 (an example of an adjustment unit, an example of a first state setting unit, an example of a second state setting unit, and an example of a third state setting unit), a signal coupler 102 (an example of a connection unit), a low-pass filter 103 (an example of a removal unit), an amplitude adjuster 104 (an example of an adjustment unit), a recorder 105, a timing adjuster 106, and a frequency converter 107. The signal generating device 10 outputs the processed signal to the amplifying device 20. Details of the processing performed by the signal generating device 10 will be described later.

[0014] 1, the amplifying device 20 includes an amplifier 201 and a distributor 202 (an example of a feedback section). The amplifying device 20 amplifies the signal received from the signal generating device 10. The amplifying device 20 then outputs the amplified signal to the receiving device 30. The amplifying device 20 also outputs the amplified signal to the outside of the communication system 1 as an output signal of the communication system 1. Details of the processing performed by the amplifying device 20 will be described later.

[0015] 1, the receiving device 30 includes a frequency converter 301 and a low-pass filter 302. The receiving device 30 converts the signal received from the amplifying device 20 into an intermediate frequency or baseband frequency signal that can be input to a digital converter. The receiving device 30 then outputs the intermediate frequency / baseband signal to the analyzing device 40. Details of the processing performed by the receiving device 30 will be described later.

[0016] 1, the analysis device 40 includes a digital converter 401, a Fourier transformer 402, a reference difference calculator 403 (an example of a comparison unit), a reference value recorder 404, a signal divider 405 (an example of a division unit), a Fourier transformer 406, and a section level difference determiner 407. The analysis device 40 outputs the difference from the reference value and the level difference for each section to the signal generating device 10. Details of the processing performed by the analysis device 40 will be described later.

[0017] The above-described processing performed by the communication system 1 according to the embodiment of the present disclosure is merely an example, and the communication system 1 is not limited to the above-described processing. For example, the communication system 1 may perform the processing described below.

[0018] (Processing performed by the communication system) Next, a description will be given of processing performed by the communication system 1. Fig. 2 is a diagram illustrating an example of a processing flow of the communication system 1 according to some embodiments of the present disclosure. Here, processing for reducing spurious signals performed by the communication system 1 illustrated in Fig. 2 will be described with reference to the diagram.

[0019] Based on the timing of an externally input reference signal, timing adjuster 106 adjusts the output timing of baseband waveform data stored in recorder 105 (step S1). Timing adjuster 106 outputs the adjusted baseband waveform data to frequency converter 107.

[0020] The frequency converter 107 up-converts the baseband waveform output by the timing adjuster 106 to a transmission frequency to be output from the amplifying device 20 (step S2). The frequency converter 107 outputs the up-converted signal to the amplifying device 20.

[0021] Amplifier 201 amplifies the level of the signal output from frequency converter 107 (step S3). Amplifier 201 outputs the amplified signal to distributor 202.

[0022] The distributor 202 distributes the signal output by the amplifier 201 and outputs (i.e., feeds back) the signal to the receiving device 30 (step S4). The distributor 202 also outputs the signal output by the amplifier 201 to the outside of the communication system 1 as an output signal of the communication system 1.

[0023] The frequency converter 301 down-converts the signal output from the distributor 202 to a baseband signal (step S5). The frequency converter 301 outputs the down-converted signal to the low-pass filter 302.

[0024] Low-pass filter 302 removes, from the signal output by frequency converter 301, an image that occurs when frequency converter 301 down-converts the signal (step S6). Low-pass filter 302 outputs the signal after image removal to analysis device 40.

[0025] The digital converter 401 converts the signal output by the low-pass filter 302 into a discrete signal (step S7), and outputs the discrete amplitude data to the Fourier transformer 402 and the signal divider 405.

[0026] The Fourier transformer 402 performs a Fourier transform on the signal output from the digital converter 401 (step S8). Then, the Fourier transformer 402 calculates a power spectrum using the result of the Fourier transform (step S9). The Fourier transformer 402 outputs the calculated power spectrum and the output signal of the digital converter 401 to the reference difference calculator 403.

[0027] The reference difference calculator 403 calculates a first difference, which is the difference in amplitude between the power spectrum output by the Fourier transformer 402 and a spectrum mask corresponding to each device stored in the reference value recorder 404 (step S10). Then, the reference difference calculator 403 outputs the calculation result as a first calculation result to the signal generating device 10. FIG. 3 is a diagram showing an example of a spectrum mask according to some embodiments of the present disclosure. An example of the spectrum mask corresponding to each device stored in the reference value recorder 404 is the spectrum mask shown in FIG. 3.

[0028] Furthermore, the reference difference calculator 403 calculates a second difference, which is the difference between the rise / fall time of the output signal of the digital converter 401 via the Fourier transformer 402 and the rise / fall time corresponding to each device stored in the reference value recorder 404 (step S11). The reference difference calculator 403 then outputs the calculation result as the second calculation result to the signal generating device 10. FIG. 4 is a diagram showing an example of rise / fall times according to some embodiments of the present disclosure. The reference value recorder 404 stores reference values ​​of rise / fall times corresponding to each target device in the form of numerical data. For example, the reference value for rise time is given as a numerical range of 10 microseconds or more and 50 microseconds or less. Note that the sampling rate of the digital converter in each target device is known. Therefore, the numerical data indicating the reference values ​​of rise / fall times stored in the reference value recorder 404 is stored in the form of 10 lower limit values ​​and 50 upper limit values ​​when the sampling rate is 1 microsecond. The reference difference calculator 403 continues to count the number of samples while the output signal of the digital converter 401, i.e., the discretized amplitude data, is increasing while temporarily storing the data. Since the maximum amplitude is determined when the amplitude data changes from increasing to decreasing, the number of rising edges from 10% to 90% of the maximum amplitude can be calculated. Similarly, for the fall time, the reference difference calculator 403 continues to count the number of samples while the amplitude data is decreasing while temporarily storing the discretized amplitude data when the maximum rising amplitude is determined. Since the 10% and 90% amplitudes calculated in the process of calculating the rise time are known, the number of falling edges can be calculated by counting the number of samples from when the amplitude data of the output signal of the digital converter 401 falls below 90% of the maximum amplitude to when it falls below 10%. Furthermore, the difference between the number of rising and falling edges and the numerical value, which is the standard value stored in the reference value recorder 404, is output to the signal generating device 10 as the second calculation result.

[0029] Furthermore, signal divider 405 divides the signal output by digital converter 401 into a plurality of equally spaced time intervals (step S12). Then, signal divider 405 outputs the divided signal to Fourier transformer 406. FIG. 5 is a diagram showing an example of a signal divided into a plurality of equally spaced time intervals according to some embodiments of the present disclosure. An example of a signal divided into a plurality of equally spaced time intervals by signal divider 405 is a signal divided into five intervals, interval 1 to interval 5, as shown in FIG. 5.

[0030] The Fourier transformer 406 performs a Fourier transform on each of the divided signals output by the signal divider 405 (step S13). Then, the Fourier transformer 406 outputs the result of the Fourier transform to the section level difference determiner 407. FIG. 6 is a diagram showing an example of the result of the Fourier transform according to some embodiments of the present disclosure. An example of the result of the Fourier transform performed by the Fourier transformer 406 is the result of the Fourier transform of each of the signals divided into the five sections shown in FIG. 5, as shown in FIG.

[0031] Section level difference determiner 407 calculates the amplitude level difference of each signal Fourier transformed by Fourier transformer 406 (i.e., the amplitude level difference of each signal divided into five sections) (step S14). Section level difference determiner 407 determines in which section an adjustment margin exists based on the calculation result (step S15). Then, section level difference determiner 407 outputs information indicating the section in which it has been determined that an adjustment margin exists to signal generating device 10.

[0032] Based on the first and second calculation results output by the reference difference calculator 403, the section signal generator 101 determines whether the power spectrum is within the range specified by the spectrum mask and the rise / fall times (step S16). If the section signal generator 101 determines that the power spectrum is within the range specified by the spectrum mask and the rise / fall times (YES in step S16), it subsequently turns off the signal coupler 102, the low-pass filter 103, and the amplitude adjuster 104 (step S17). By performing the process of step S17, the signal generating device 10 does not perform a process of updating the baseband waveform data stored in the recorder 105. Then, the timing adjuster 106 continues to use and process the baseband waveform data output by the recorder 105, and the communication system 1 continues the series of processes.

[0033] Furthermore, if the section signal generator 101 determines that the power spectrum is outside the range of the specifications indicated by the spectrum mask (NO in step S16), it makes the rising / falling slopes of the baseband waveform steeper for sections where the level of the power spectrum is relatively low in the calculation result of the section level difference determiner 407, and makes the rising / falling slopes of the baseband waveform gentler for sections where the level of the power spectrum is relatively high (step S18). Furthermore, if the section signal generator 101 determines that the power spectrum is outside the range of the specifications indicated by the spectrum mask (NO in step S16), it turns on the signal coupler 102, the low-pass filter 103, and the amplitude adjuster 104.

[0034] 7 is a diagram illustrating an example of the relationship between a power spectrum and a spectrum mask according to some embodiments of the present disclosure. For example, when the power spectrum has values ​​greater than the specifications indicated by the spectrum mask, as in the areas indicated by symbols A and B in FIG. 7, the section signal generator 101 determines that the power spectrum is outside the range of the specifications indicated by the spectrum mask. Then, for example, when the result of the Fourier transform performed by the Fourier transformer 406 is the result of the Fourier transform shown in FIG. 6, the section signal generator 101 makes the rising and falling slopes of the baseband waveform steeper for sections 1 and 5 and makes the rising and falling slopes of the baseband waveform gentler for sections 2 and 4.

[0035] The signal coupler 102 generates a single signal by coupling the time-shared signals after changing the slopes of the rising and falling edges of the baseband waveforms (step S19). The signal coupler 102 outputs the generated signal to the low-pass filter 103. FIG. 8 is a diagram illustrating an example of a signal generated by the signal coupler 102 according to some embodiments of the present disclosure. Simply coupling the time-shared signals after changing the slopes of the rising and falling edges of the baseband waveforms may result in corners in the signal at the points where the signals are coupled when generating a single signal, as shown at points C and D in FIG. 8.

[0036] The low-pass filter 103 removes sharp edges from the signal output by the signal coupler 102 by removing high-frequency components from the signal (step S20). The low-pass filter 103 outputs the signal from which the sharp edges have been removed to the amplitude adjuster 104. FIG. 9 is a diagram illustrating an example of a signal output by the low-pass filter 103 according to some embodiments of the present disclosure. By the low-pass filter 103 removing sharp edges from the signal output by the signal coupler 102, the waveform of the signal is changed from a sharp line to a gentle curve, as shown at the locations indicated by symbols E and F in FIG. 9, and the amplitude characteristics of the output signal from the amplifier 201 relative to the spurious mask in the frequency domain are improved.

[0037] Reference difference calculator 403 calculates the maximum amplitude value in the process of calculating the rise time / fall time. If a decrease in amplitude is observed in the output signal of amplifier device 20 based on the maximum value, amplitude adjuster 104 amplifies the signal output by low-pass filter 103 to a predetermined amplitude (step S21). Then, amplitude adjuster 104 outputs the amplified signal (however, if no decrease in amplitude is observed in the output signal of amplifier device 20, the signal output by low-pass filter 103) to recorder 105. In other words, the amplification factor of amplifier 201 of amplifier device 20 remains constant in a steady state. However, the amplitude may decrease (performance degradation) due to factors such as performance degradation associated with an increase in the repetition period of the reference signal and output degradation due to high temperatures. The amplitude adjuster 104 alleviates such environmental factors. The amplitude adjuster 104 increases or decreases the amplitude of the data output to the recorder 105 using the result of the reference difference calculator 403 so that the output of the amplifier 201 remains constant even if the usage conditions (load increase or decrease) or environmental conditions change. Fig. 10 is a diagram showing an example of a signal output by the amplitude adjuster 104 according to some embodiments of the present disclosure. The signal output by the amplitude adjuster 104 is either a pre-amplified signal (i.e., a signal output by the low-pass filter 103) or an amplified signal obtained by amplifying the pre-amplified signal, as shown in Fig. 10.

[0038] The recorder 105 stores the signal output by the amplitude adjuster 104 as a baseband waveform (step S22). By repeating the above process, the communication system 1 can realize an output waveform from the amplifying device 20 in which the characteristics of the analog circuit (i.e., the amplifier 201) are successively improved for different reference waveforms.

[0039] (advantage) The above describes the communication system 1 according to an embodiment of the present disclosure. The communication system 1 includes a section signal generator 101 (an example of a comparator) that compares the power spectrum of a periodically transmitted pulse signal with a predetermined reference value, and an amplitude adjuster 104 (an example of an adjuster) that adjusts the amplitude of the pulse signal based on a comparison result by the section signal generator 101 if the power spectrum is outside the range of the predetermined reference value.

[0040] This communication system 1 allows the user to appropriately adjust the shape of spurious signals that change depending on the situation without being aware of it.

[0041] 11 is a diagram illustrating an example of a configuration of a communication system 1 according to another embodiment of the present disclosure. As illustrated in FIG.

[0042] A comparison unit 501 compares the power spectrum of a periodically transmitted pulse signal with a predetermined reference value. An adjustment unit 502 adjusts the amplitude of the pulse signal based on the comparison result by the comparison unit 501 if the power spectrum is outside the range of the predetermined reference value.

[0043] The comparison unit 501 can be realized, for example, by using the function of the section signal generator 101 illustrated in Fig. 1. The adjustment unit 502 can be realized, for example, by using the function of the amplitude adjuster 104 illustrated in Fig. 1.

[0044] 12 is a diagram illustrating an example of a processing flow of the communication system 1 according to another embodiment of the present disclosure. Next, processing of the communication system 1 according to another embodiment of the present disclosure will be described with reference to FIG.

[0045] The comparison unit 501 compares the power spectrum of a periodically transmitted pulse signal with a predetermined reference value (step S101). Based on the comparison result by the comparison unit 501, the adjustment unit 502 adjusts the amplitude of the pulse signal if the power spectrum is outside the range of the predetermined reference value (step S102).

[0046] The communication system 1 according to another embodiment of the present disclosure has been described above. This communication system 1 makes it possible to appropriately adjust the shape of spurious signals that change depending on the situation without the user being aware of it.

[0047] The order of the processes in the embodiments of the present disclosure may be changed as long as the processes are performed appropriately.

[0048] Although the embodiments of the present disclosure have been described, the above-mentioned communication system 1 and other control devices may have a computer system built therein. The above-mentioned processing steps are stored in the form of a program on a computer-readable recording medium, and the computer reads and executes this program to perform the above processing. Specific examples of computers are shown below.

[0049] 13 is a schematic block diagram showing the configuration of a computer according to at least one embodiment. As shown in FIG. 13, the computer 5 includes a CPU (Central Processing Unit) 6, a main memory 7, a storage 8, and an interface 9.

[0050] For example, the above-described communication system 1 and other control devices are implemented in a computer 5. The operations of the above-described processing units are stored in the form of a program in a storage 8. The CPU 6 reads the program from the storage 8, loads it into the main memory 7, and executes the above-described processing in accordance with the program. The CPU 6 also allocates storage areas in the main memory 7 corresponding to the above-described storage units in accordance with the program. The CPU 6 of the present disclosure may be a controller.

[0051] Examples of storage 8 include a hard disk drive (HDD), a solid state drive (SSD), a magnetic disk, a magneto-optical disk, a compact disc read-only memory (CD-ROM), a digital versatile disc read-only memory (DVD-ROM), and a semiconductor memory. Storage 8 may be an internal medium directly connected to the bus of computer 5, or an external medium connected to computer 5 via interface 9 or a communication line. In addition, when this program is distributed to computer 5 via a communication line, computer 5 that receives the program may load the program into main memory 7 and execute the above-mentioned processing. In at least one embodiment, storage 8 is a non-transitory tangible storage medium.

[0052] The program may also implement some of the functions described above. Furthermore, the program may be a file that can implement the functions described above in combination with a program already recorded in the computer system, a so-called differential file (differential program).

[0053] Although several embodiments of the present disclosure have been described, these embodiments are merely examples and do not limit the scope of the disclosure. Various additions, omissions, substitutions, and modifications may be made to these embodiments without departing from the spirit of the disclosure.

[0054] Note that part or all of the above-described embodiments can be described as, but are not limited to, the following supplementary notes.

[0055] (Appendix 1) a comparison unit that compares the power spectrum of the periodically transmitted pulse signal with a predetermined reference value; an adjustment unit that adjusts the amplitude of the pulse signal when the power spectrum is outside the range of the predetermined reference value based on the comparison result by the comparison unit; A communication system comprising:

[0056] (Appendix 2) a first state setting unit that sets the adjustment unit to an OFF state when the power spectrum is within the range of the predetermined reference value based on a comparison result by the comparison unit; 2. The communication system of claim 1, comprising:

[0057] (Appendix 3) A connecting portion that connects waveforms; Equipped with If the power spectrum is outside the range of the predetermined reference value based on the comparison result by the comparison unit, The adjustment unit adjusting a slope of a waveform for each of a plurality of time-divided sections of the pulse signal; The connecting portion is Concatenating the plurality of waveforms adjusted by the adjustment unit; 10. The communication system of claim 1 or 2.

[0058] (Appendix 4) a removal unit that removes high frequency components from the signal obtained by connecting the plurality of waveforms adjusted by the connection unit when the power spectrum is outside the range of the predetermined reference value based on a comparison result by the comparison unit; 4. The communication system of claim 3, comprising:

[0059] (Appendix 5) a second state setting unit that sets the coupling unit to an OFF state when the power spectrum is within the range of the predetermined reference value based on a comparison result by the comparison unit; 5. The communication system according to claim 3 or 4, comprising:

[0060] (Appendix 6) a third state setting unit that sets the removal unit to an OFF state when the power spectrum is within the range of the predetermined reference value based on a comparison result by the comparison unit; 5. The communication system of claim 4, comprising:

[0061] (Appendix 7) a division unit that divides the pulse signal into waveforms of a plurality of time-divided sections; 7. The communication system according to any one of claims 3 to 6, comprising:

[0062] (Appendix 8) a feedback unit that feeds back the pulse signal to the comparison unit; 8. The communication system according to any one of claims 1 to 7, comprising:

[0063] (Appendix 9) comparing a power spectrum of the periodically transmitted pulse signal with a predetermined reference value; adjusting the amplitude of the pulse signal if the power spectrum is outside the range of the predetermined reference value based on the comparison result; A processing method comprising:

[0064] (Appendix 10) turning off the adjustment unit when the power spectrum is within the range of the predetermined reference value based on the comparison result; Attachment 9, a processing method comprising:

[0065] (Appendix 11) Concatenating waveforms; Including, If, based on the comparison result, the power spectrum is outside the range of the predetermined reference value, adjusting a slope of a waveform for each of a plurality of time-divided sections of the pulse signal; Concatenating the adjusted waveforms; 11. The method of claim 9 or 10, comprising:

[0066] (Appendix 12) If the power spectrum is outside the range of the predetermined reference value based on the comparison result, removing high frequency components in the signal obtained by concatenating the adjusted plurality of waveforms; 12. The method of claim 11, comprising:

[0067] (Appendix 13) Based on the comparison result, if the power spectrum is within the range of the predetermined reference value, the coupling unit is turned off; 13. The method of claim 11 or 12, comprising:

[0068] (Appendix 14) turning off the removal unit when the power spectrum is within the range of the predetermined reference value based on the comparison result; 13. The method of claim 12, comprising:

[0069] (Appendix 15) Dividing the pulse signal into waveforms of a plurality of time-divided sections; 15. The processing method according to any one of claims 11 to 14, including:

[0070] (Appendix 16) feeding back the pulse signal; 16. The processing method according to any one of appendices 9 to 15,

[0071] (Appendix 17) comparing a power spectrum of the periodically transmitted pulse signal with a predetermined reference value; adjusting the amplitude of the pulse signal if the power spectrum is outside the range of the predetermined reference value based on the comparison result; A program that causes a computer to execute the following.

[0072] (Appendix 18) turning off the adjustment unit when the power spectrum is within the range of the predetermined reference value based on the comparison result; 18. The program according to claim 17, which causes the computer to execute the above steps.

[0073] (Appendix 19) Concatenating waveforms; causing the computer to execute If, based on the comparison result, the power spectrum is outside the range of the predetermined reference value, adjusting a slope of a waveform for each of a plurality of time-divided sections of the pulse signal; Concatenating the adjusted waveforms; 19. The program according to claim 17 or 18, which causes the computer to execute the above.

[0074] (Appendix 20) If the power spectrum is outside the range of the predetermined reference value based on the comparison result, removing high frequency components in the signal obtained by concatenating the adjusted plurality of waveforms; 20. The program according to claim 19, which causes the computer to execute the above steps.

[0075] (Appendix 21) Based on the comparison result, if the power spectrum is within the range of the predetermined reference value, the coupling unit is turned off; 21. The program according to claim 19 or 20, which causes the computer to execute the above.

[0076] (Appendix 22) turning off the removal unit when the power spectrum is within the range of the predetermined reference value based on the comparison result; 21. The program according to claim 20, which causes the computer to execute the above.

[0077] (Appendix 23) Dividing the pulse signal into waveforms of a plurality of time-divided sections; 23. The program according to any one of claims 19 to 22, which causes the computer to execute the above.

[0078] (Appendix 24) feeding back the pulse signal; 24. The program according to any one of appendices 18 to 23, which causes the computer to execute the program. [Explanation of symbols]

[0079] 1. Communication Systems 5. Computer 6 CPU 7. Main memory 8. Storage 9. Interface 10...Signal generation device 20 Amplification device 30. Receiving device 40...Analysis equipment 101... Section signal generator 102...Signal coupler 103 Low-pass filter 104...Amplitude adjuster 105 Recorder 106 Timing adjuster 107··· and frequency converter 201 Amplifier 202...Distributor 301 Frequency Converter 302 Low-pass filter 401... Digital Converter 402 Fourier transformer 403...Reference difference calculator 404 Reference value recorder 405...Signal splitter 406...Fourier transformer 407 Section level difference judger 501 Comparison section 502...Adjustment section

Claims

1. a comparison unit that compares the power spectrum of the periodically transmitted pulse signal with a predetermined reference value; an adjustment unit that adjusts the amplitude of the pulse signal when the power spectrum is outside the range of the predetermined reference value based on the comparison result by the comparison unit; A communication system comprising:

2. a first state setting unit that sets the adjustment unit to an OFF state when the power spectrum is within the range of the predetermined reference value based on a comparison result by the comparison unit; The communication system of claim 1 , comprising:

3. a connecting portion that connects waveforms; Equipped with If the power spectrum is outside the range of the predetermined reference value based on the comparison result by the comparison unit, The adjustment unit adjusting a slope of a waveform for each of a plurality of time-divided sections of the pulse signal; The connecting portion is Concatenating the plurality of waveforms adjusted by the adjustment unit; 3. The communication system according to claim 1 or 2.

4. a removal unit that removes high frequency components from the signal obtained by connecting the plurality of waveforms adjusted by the connection unit when the power spectrum is outside the range of the predetermined reference value based on a comparison result by the comparison unit; The communication system of claim 3 , comprising:

5. a second state setting unit that sets the coupling unit to an OFF state when the power spectrum is within the range of the predetermined reference value based on a comparison result by the comparison unit; The communication system of claim 3 , comprising:

6. a third state setting unit that sets the removal unit to an OFF state when the power spectrum is within the range of the predetermined reference value based on a comparison result by the comparison unit; The communication system of claim 4 , comprising:

7. a division unit that divides the pulse signal into waveforms of a plurality of time-divided sections; The communication system of claim 3 , comprising:

8. a feedback unit that feeds back the pulse signal to the comparison unit; The communication system of claim 1 , comprising:

9. comparing a power spectrum of the periodically transmitted pulse signal with a predetermined reference value; adjusting the amplitude of the pulse signal if the power spectrum is outside the range of the predetermined reference value based on the comparison result; A processing method comprising:

10. comparing a power spectrum of the periodically transmitted pulse signal with a predetermined reference value; adjusting the amplitude of the pulse signal if the power spectrum is outside the range of the predetermined reference value based on the comparison result; A program that causes a computer to execute the following.

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