CN103713279A - Multi-channel synchronization excitation source system - Google Patents
Multi-channel synchronization excitation source system Download PDFInfo
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- CN103713279A CN103713279A CN201410006443.1A CN201410006443A CN103713279A CN 103713279 A CN103713279 A CN 103713279A CN 201410006443 A CN201410006443 A CN 201410006443A CN 103713279 A CN103713279 A CN 103713279A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
- G01S19/256—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to timing, e.g. time of week, code phase, timing offset
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S2013/0236—Special technical features
- G01S2013/0245—Radar with phased array antenna
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention provides a multi-channel radar synchronization excitation source system which comprises a high-precision frequency source system, a multi-channel radar signal waveform synthesis system and a detection feedback system. The high-precision frequency source system provides a high-precision reference clock for the multi-channel radar signal waveform synthesis system. The multi-channel radar signal waveform synthesis system achieves direct synthesis of output radar signal waveforms through DDS. The detection feedback system couples output signals of all channels of the multi-channel radar signal waveform synthesis system, the amplitude difference values and the phase difference values among all the channels are extracted through a series of algorithms, the amplitude difference values and the phase difference values are fed back into the radar signal waveform synthesis system, the multi-channel radar signal waveform synthesis system adjusts the amplitude and the phase of the output signals of all the channels in real time according to the feedback difference values, and all the channels of the radar signal waveforms output by the entire multi-channel radar system are made to be strictly the same in frequency, amplitude and phase in the end, namely a multi-channel synchronization excitation source is formed.
Description
Technical field
The present invention relates in Multichannel radar system the multi-channel synchronous driving source system of output waveform amplitude, frequency and phase place strict conformance between a kind of each passage.
Background technology
Along with making constant progress of hyperchannel phased-array technique, more and more stricter for the waveform characteristic requirement of each passage output.For Multichannel radar system, the consistance of the amplitude of each passage output waveform, the consistance of frequency, the consistance of phase place is to weigh the important indicator of a Multichannel radar system quality.For the amplitude of the output waveform signals of each passage of radar, frequency and phase place are synthetic by the wave beam that directly affects whole phased array radar system, and the dissatisfactory Multichannel radar system of its consistance even can not worked normally.
Traditional hyperchannel driving source, is mainly used in phased array system.It comprises centralized and distributed two kinds.Centralized referring to by merits such as a driving source carry out divided output, yet because the length between each passage and material technology etc. have trickle difference, cause the characteristic between passage can not be in full accord, thereby have influence on amplitude and the phase place of the radar waveform signal of output terminal.And distributedly refer to that each passage has independently source, can regulate separately the parameter in each source, thereby it is more distributed more flexible and changeable on using, yet owing to being separate between source, is difficult to make source synchronously to export.
Therefore be the consistent of centralized driving source or distributed driving source amplitude, frequency and the phase propetry of exporting radar signal waveform between all can not each passage of strict guarantee.
Summary of the invention
The present invention is directed to the problems referred to above, a kind of multi-channel synchronous driving source system is provided, this system is to improve on distributed basis, can the magnitude-phase characteristics between multichannel radar system transmission channel be detected and be extracted, calculate amplitude and phase differential between each passage, and fed back to source and adjust compensation.Thereby can make multi-channel system synchronously to export, the normal work of safeguards system.In addition, this system also comprises the high-precision frequency source that adopts gps signal calibration, usings this reference clock as hyperchannel driving source, has improved greatly precision and the degree of stability of whole system.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A Multichannel radar synchronization motivationtheory origin system, comprises high-precision frequency source system, Multichannel radar signal waveform synthesis system, detection feedback system; The output terminal of high-precision frequency source system is connected with the input end of Multichannel radar signal waveform synthesis system, the output terminal of Multichannel radar signal waveform synthesis system is connected with the input end of detection feedback system by coupling mechanism, and the output terminal of detection feedback system is connected with the input end of Multichannel radar signal waveform synthesis system.
Described high-precision frequency source system comprises GPS OEM plate, fpga chip, digital to analog converter, constant temperature crystalline substance
Oscillation body device OCXO, shaping circuit, wave filter; GPS OEM plate is connected with gps antenna, and FPGA is connected with GPS OEM plate, digital to analog converter, shaping circuit respectively, and constant-temperature crystal oscillator OCXO is connected with digital to analog converter, shaping circuit, wave filter respectively;
After gps satellite locking, GPS OEM plate in high-precision frequency source system produces and exports high-precision pps pulse per second signal by the gps satellite signal of catching, pps pulse per second signal compares through processing and local constant-temperature crystal oscillator OCXO is calibrated in logic analysis, the output signal of OCXO is linked into fpga chip through shaping circuit feedback, the output of digital to analog converter is adjusted to control OCXO in fpga chip inside by pps pulse per second signal by programmed control, make the sine wave signal of the 10MHz that OCXO output high precision and degree of stability are very high as the reference clock of Multichannel radar signal waveform synthesis system.
Described Multichannel radar signal waveform synthesis system comprises USB interface chip, fpga chip, frequently direct
Rate compositor DDS chip; USB interface chip, DDS chip are connected with fpga chip respectively;
Fpga chip completes the sequential control to DDS chip, and USB interface chip is connected with the USB interface of computing machine by usb data line; Computing machine writes order to control the fpga chip in Multichannel radar signal waveform synthesis system by USB interface, makes DDS chip export needed radar signal waveform, and the parameter of radar signal waveform comprises amplitude, frequency, phase place etc.
Described detection feedback system comprise successively the signal conditioning circuit that connects, multi-channel high-speed A D sampling A/D chip,
Fpga chip; Signal conditioning circuit is connected with coupling mechanism;
Multi-channel high-speed A in detection feedback system D sampling A/D chip adopt difference input, and by the be coupled output signal of each passage of directional coupler, signal conditioning circuit is nursed one's health the output signal of coupling mechanism; Multi-channel high-speed A signal after D sampling A/D chip collection conditioning, by fpga chip, carry out digital signal processing and complete the extraction of the amplitude difference of signal between each passage and phase differential and fed back to Multichannel radar signal waveform synthesis system;
Multichannel radar signal wave closes amplitude and the phase place that difference that formation system feeds back to according to detection feedback system is adjusted each channel signal of DDS chip output in real time, so that final whole Multichannel radar system is strict synchronous at output terminal, between each passage of radar signal waveform of output, be strict with frequently with width homophase, be a kind of multichannel synchronization motivationtheory source.
Described multi-channel high-speed A D sampling A/D chip adopt high speed LVDS interface circuit and fpga chip number
Reportedly send.
Compared with prior art, the present invention can be provided with the synchronization motivationtheory source of multiplexer channel, can detect the phase amplitude difference of multiplexer channel output terminal simultaneously, and any two passages all can be used separately.Between each passage of radar signal waveform of can strict guarantee whole Multichannel radar system output, be with frequently with width homophase.On frequently with the basis of width homophase, the relative amplitude between each passage can also be set arbitrarily, frequency and phase place, can be more flexible and changeable so that adjust output.
Accompanying drawing explanation
Fig. 1 is overall system diagram of the present invention;
Fig. 2 is working-flow figure of the present invention;
Fig. 3 is high-precision frequency source system chart of the present invention;
Fig. 4 is Multichannel radar signal waveform synthesis system block diagram of the present invention;
Fig. 5 is DDS and corresponding peripheral circuit schematic diagram in Multichannel radar signal waveform synthesis system of the present invention;
Fig. 6 is the top layer theory diagram that in Multichannel radar signal waveform synthesis system of the present invention, FPGA sequential logic is controlled;
Fig. 7 is detection feedback system block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and produce the embodiment in the synchronization motivationtheory source of five paths, the present invention is described in further detail.
Referring to Fig. 1, the present invention includes high-precision frequency source system, Multichannel radar signal waveform synthesis system, detection feedback system; The output terminal of high-precision frequency source system is connected with the input end of Multichannel radar signal waveform synthesis system, the output terminal of Multichannel radar signal waveform synthesis system is connected with the input end of detection feedback system by coupling mechanism, and the output terminal of detection feedback system is connected with the input end of Multichannel radar signal waveform synthesis system.Connected mode between each system as shown in Figure 1.High-precision frequency source system is calibrated local constant-temperature crystal oscillator by the gps satellite signal of catching, and makes finally to export the sine wave signal of high-precision 10MHz as the reference clock of Multichannel radar signal waveform synthesis system.Multichannel radar signal waveform synthesis system completes the directly synthetic and output of radar waveform.Detection feedback system gathers the output signal of each passage by coupling mechanism, algorithm by a series of digital signal processing completes the extraction of each channel wave shape parameter information and feeds back to Multichannel radar signal waveform synthesis system and carries out channel compensation, to guarantee that final Multichannel radar signal system is strict synchronous at output terminal, between each passage of radar signal waveform of whole Multichannel radar system output with width with homophase frequently.
Fig. 2 is the workflow diagram of whole system.After system powers on, system will automatically lock gps satellite, and computer man-machine interacting operation interface completes by the usb bus bottom DDS that writes direct and controls the function of parameter, so that native system is exported needed radar waveform signal.The waveform signal of coupling mechanism coupling output through the multi-channel high-speed A of detection feedback system D sampling, through a series of Digital Signal Processings, complete afterwards extraction and the judgement of each channel wave shape parameter (amplitude, phase place), if each channel amplitude phase place is consistent, Multichannel radar signal waveform synthesis system output signal; If each channel amplitude phase place is inconsistent, respectively each paths is carried out to calibration of amplitude and phase, and upgrade the corresponding control word of DDS.Final Multichannel radar signal system is strict synchronous at output terminal.
Native system can also arrange arbitrarily the relative amplitude between each passage on frequently with the basis of width homophase, and frequency and phase place, so that output radar signal waveform is more flexible and changeable.
Fig. 3 is the system chart of high-precision frequency source system in native system, high-precision frequency source system produces pps pulse per second signal accurately by the gps satellite signal of catching and calibrates local constant-temperature crystal oscillator OCXO, the 10MHz reference clock that output accuracy and degree of stability are very high through a series of processing comparison and logic analysis.
High-precision frequency source system comprises GPS OEM plate, fpga chip, digital to analog converter, constant-temperature crystal oscillator OCXO, shaping circuit, wave filter; GPS OEM plate is connected with gps antenna, and FPGA is connected with GPS OEM plate, digital to analog converter, shaping circuit respectively, and constant-temperature crystal oscillator OCXO is connected with digital to analog converter, shaping circuit, wave filter respectively;
After gps satellite locking, GPS OEM plate in high-precision frequency source system produces and exports high-precision pps pulse per second signal by the gps satellite signal of catching, pps pulse per second signal compares through processing and local constant-temperature crystal oscillator OCXO is calibrated in logic analysis, the output signal of OCXO is linked into fpga chip through shaping circuit feedback, the output of digital to analog converter is adjusted to control OCXO in fpga chip inside by pps pulse per second signal by programmed control, make the sine wave signal of the 10MHz that OCXO output high precision and degree of stability are very high as the reference clock of Multichannel radar signal waveform synthesis system.
Fig. 4 is native system Multichannel radar signal waveform synthesis system block diagram, by usb bus, can directly control the various required radar waveform signals of DDS output.
Multichannel radar signal waveform synthesis system comprises USB interface chip, fpga chip, direct synthesizer DDS chip; USB interface chip, DDS chip are connected with fpga chip respectively; Fpga chip completes the sequential control to DDS chip, and USB interface chip is connected with the USB interface of computing machine by usb data line; Computing machine is controlled the fpga chip in Multichannel radar signal waveform synthesis system by USB interface, makes DDS chip export needed radar signal waveform.
Fig. 5 is the peripheral circuit schematic diagram such as DDS and rear class amplification filtering in Multichannel radar signal waveform synthesis system of the present invention, is the some passages in hyperchannel in figure, and other passages are similar with it.
Fig. 6 is the top layer theory diagram that in Multichannel radar signal waveform synthesis system of the present invention, FPGA sequential logic is controlled.
Fig. 7 is detection feedback system block diagram of the present invention, by the be coupled waveform signal of each passage output of coupling mechanism, again through high speed A D sampling, in FPGA inside, complete a series of digital signal processing, extract the characterisitic parameter of each passage and fed back to Multichannel radar waveform signal synthesis system, adjust between each passage of radar signal waveform that output makes whole Multichannel radar system output be strictly with width with homophase frequently.
Detection feedback system comprise successively the signal conditioning circuit that connects, multi-channel high-speed A D sampling A/D chip, fpga chip; Signal conditioning circuit is connected with coupling mechanism; Multi-channel high-speed A in detection feedback system D sampling A/D chip adopt difference input, and by directional coupler coupling channel signal, signal conditioning circuit is nursed one's health the output signal of coupling mechanism; Multi-channel high-speed A signal after D sampling A/D chip collection conditioning, by fpga chip, carrying out digital signal processing completes the extraction of the amplitude difference of signal between each passage and phase differential and is fed back to Multichannel radar signal waveform synthesis system, Multichannel radar signal wave closes formation system and according to the difference feeding back to, adjusts in real time amplitude and the phase place of each passage output signal, so that between each passage of radar signal waveform of final whole Multichannel radar system output, be strict with frequently with width homophase, be a kind of multichannel synchronization motivationtheory source.
Claims (5)
1. a Multichannel radar synchronization motivationtheory origin system, is characterized in that: comprise high-precision frequency source system, Multichannel radar signal waveform synthesis system, detection feedback system; The output terminal of high-precision frequency source system is connected with the input end of Multichannel radar signal waveform synthesis system, the output terminal of Multichannel radar signal waveform synthesis system is connected with the input end of detection feedback system by coupling mechanism, and the output terminal of detection feedback system is connected with the input end of Multichannel radar signal waveform synthesis system.
2. a kind of Multichannel radar synchronization motivationtheory origin system according to claim 1, is characterized in that: described high-precision frequency source system comprises GPS OEM plate, fpga chip, digital to analog converter, constant-temperature crystal oscillator OCXO, shaping circuit, wave filter; GPS OEM plate is connected with gps antenna, and FPGA is connected with GPS OEM plate, digital to analog converter, shaping circuit respectively, and constant-temperature crystal oscillator OCXO is connected with digital to analog converter, shaping circuit, wave filter respectively;
After gps satellite locking, GPS OEM plate in high-precision frequency source system produces and exports high-precision pps pulse per second signal by the gps satellite signal of catching, pps pulse per second signal compares through processing and local constant-temperature crystal oscillator OCXO is calibrated in logic analysis, the output signal of OCXO is linked into fpga chip through shaping circuit feedback, the output of digital to analog converter is adjusted to control OCXO in fpga chip inside by pps pulse per second signal by programmed control, make the sine wave signal of the 10MHz that OCXO output high precision and degree of stability are very high as the reference clock of Multichannel radar signal waveform synthesis system.
3. a kind of Multichannel radar synchronization motivationtheory origin system according to claim 2, is characterized in that: described Multichannel radar signal waveform synthesis system comprises USB interface chip, fpga chip, direct synthesizer DDS chip; USB interface chip, DDS chip are connected with fpga chip respectively; Fpga chip completes the sequential control to DDS chip, and USB interface chip is connected with the USB interface of computing machine by usb data line;
Computing machine is controlled the fpga chip in Multichannel radar signal waveform synthesis system by USB interface, makes DDS chip export needed radar signal waveform.
4. a kind of Multichannel radar synchronization motivationtheory origin system according to claim 3, is characterized in that: described detection feedback system comprise the signal conditioning circuit that connects successively, multi-channel high-speed A D sampling A/D chip, fpga chip; Signal conditioning circuit is connected with coupling mechanism;
Multi-channel high-speed A in detection feedback system D sampling A/D chip adopt difference input, and by directional coupler coupling channel signal, signal conditioning circuit is nursed one's health the output signal of coupling mechanism; Multi-channel high-speed A signal after D sampling A/D chip collection conditioning, by fpga chip, carrying out digital signal processing completes the extraction of the amplitude difference of signal between each passage and phase differential and is fed back to Multichannel radar signal waveform synthesis system, Multichannel radar signal wave closes formation system and according to the difference feeding back to, adjusts in real time amplitude and the phase place of each passage output signal, so that between each passage of radar signal waveform of final whole Multichannel radar system output, be strict with frequently with width homophase, be a kind of multichannel synchronization motivationtheory source.
5. a kind of Multichannel radar synchronization motivationtheory origin system according to claim 4, is characterized in that: described multi-channel high-speed A D sampling A/D chip adopt high speed LVDS interface circuit and fpga chip to carry out data transmission.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106470077A (en) * | 2015-08-21 | 2017-03-01 | 上海无线通信研究中心 | A kind of parallel channel method of testing and system |
| CN106612151A (en) * | 2016-12-12 | 2017-05-03 | 武汉滨湖电子有限责任公司 | Device and synchronization method for synchronous output between multichannel DDSs |
| CN107097975A (en) * | 2017-01-06 | 2017-08-29 | 北京航空航天大学 | Multi signal feedback loading decoupling method and device for structural testing system |
| CN107121586A (en) * | 2017-05-04 | 2017-09-01 | 吉林大学 | A kind of pair of Phase Lock Technique 20Hz ~ 20kHz multiple-frequency signal amplitude-phase detects distributed system in real time |
| CN107705253A (en) * | 2017-10-26 | 2018-02-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of method and device for generating video pump source |
| CN108111243A (en) * | 2016-11-25 | 2018-06-01 | 中兴通讯股份有限公司 | Clock transmission system and corresponding clock synchronization process method and apparatus |
| CN108614271A (en) * | 2018-07-06 | 2018-10-02 | 中国计量大学 | A kind of multichannel ultrasonic arbitrary waveform signal generator with feedback compensation |
| JP2019503491A (en) * | 2016-02-12 | 2019-02-07 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Radar sensor for car driver assist system |
| CN109683137A (en) * | 2018-12-24 | 2019-04-26 | 中国电子科技集团公司第二十研究所 | A kind of multi-channel synchronization method applied to phased-array radar |
| CN112067004A (en) * | 2020-09-16 | 2020-12-11 | 上海商汤临港智能科技有限公司 | Time domain synchronization method and device of automatic driving system |
| CN113740809A (en) * | 2021-09-10 | 2021-12-03 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Multi-channel extensible broadband excitation generation device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5250951A (en) * | 1991-04-18 | 1993-10-05 | Valentine Research, Inc. | Motor vehicle police radar detector for detecting multiple radar sources |
| CN101662301A (en) * | 2009-06-24 | 2010-03-03 | 北京理工大学 | Eight-channel DDS signal source board |
| CN102331575A (en) * | 2011-06-23 | 2012-01-25 | 中国电子科技集团公司第三十八研究所 | Single-pass full-polarization interferometric synthetic aperture radar (SAR) |
| WO2013144146A1 (en) * | 2012-03-30 | 2013-10-03 | Thales | Device for active and passive electromagnetic detection with a low likelihood of interception |
-
2014
- 2014-01-07 CN CN201410006443.1A patent/CN103713279B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5250951A (en) * | 1991-04-18 | 1993-10-05 | Valentine Research, Inc. | Motor vehicle police radar detector for detecting multiple radar sources |
| CN101662301A (en) * | 2009-06-24 | 2010-03-03 | 北京理工大学 | Eight-channel DDS signal source board |
| CN102331575A (en) * | 2011-06-23 | 2012-01-25 | 中国电子科技集团公司第三十八研究所 | Single-pass full-polarization interferometric synthetic aperture radar (SAR) |
| WO2013144146A1 (en) * | 2012-03-30 | 2013-10-03 | Thales | Device for active and passive electromagnetic detection with a low likelihood of interception |
Non-Patent Citations (2)
| Title |
|---|
| 宋征等: "基于AD9959 的高精度多通道雷达信号源设计", 《电子设计工程》, 30 September 2012 (2012-09-30) * |
| 杜文建: "GPS与恒温晶振互补的高稳定时钟研究", 《中国优秀硕士学位论文全文数据库信息科技辑》, 15 October 2012 (2012-10-15) * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106470077A (en) * | 2015-08-21 | 2017-03-01 | 上海无线通信研究中心 | A kind of parallel channel method of testing and system |
| CN106470077B (en) * | 2015-08-21 | 2019-04-16 | 上海无线通信研究中心 | A kind of parallel channel test method and system |
| JP2019503491A (en) * | 2016-02-12 | 2019-02-07 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Radar sensor for car driver assist system |
| CN108111243A (en) * | 2016-11-25 | 2018-06-01 | 中兴通讯股份有限公司 | Clock transmission system and corresponding clock synchronization process method and apparatus |
| CN106612151A (en) * | 2016-12-12 | 2017-05-03 | 武汉滨湖电子有限责任公司 | Device and synchronization method for synchronous output between multichannel DDSs |
| CN107097975A (en) * | 2017-01-06 | 2017-08-29 | 北京航空航天大学 | Multi signal feedback loading decoupling method and device for structural testing system |
| CN107121586A (en) * | 2017-05-04 | 2017-09-01 | 吉林大学 | A kind of pair of Phase Lock Technique 20Hz ~ 20kHz multiple-frequency signal amplitude-phase detects distributed system in real time |
| CN107705253B (en) * | 2017-10-26 | 2021-05-04 | 中国科学院长春光学精密机械与物理研究所 | Method and device for generating video excitation source |
| CN107705253A (en) * | 2017-10-26 | 2018-02-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of method and device for generating video pump source |
| CN108614271A (en) * | 2018-07-06 | 2018-10-02 | 中国计量大学 | A kind of multichannel ultrasonic arbitrary waveform signal generator with feedback compensation |
| CN108614271B (en) * | 2018-07-06 | 2023-10-20 | 中国计量大学 | Multichannel ultrasonic wave arbitrary waveform signal generator with feedback correction |
| CN109683137A (en) * | 2018-12-24 | 2019-04-26 | 中国电子科技集团公司第二十研究所 | A kind of multi-channel synchronization method applied to phased-array radar |
| CN112067004A (en) * | 2020-09-16 | 2020-12-11 | 上海商汤临港智能科技有限公司 | Time domain synchronization method and device of automatic driving system |
| CN113740809A (en) * | 2021-09-10 | 2021-12-03 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Multi-channel extensible broadband excitation generation device and method |
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