CN104090274A - Outer transmitter-based radar system based on multi-FM broadcasting and signal processing method - Google Patents
Outer transmitter-based radar system based on multi-FM broadcasting and signal processing method Download PDFInfo
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- CN104090274A CN104090274A CN201410343541.4A CN201410343541A CN104090274A CN 104090274 A CN104090274 A CN 104090274A CN 201410343541 A CN201410343541 A CN 201410343541A CN 104090274 A CN104090274 A CN 104090274A
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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
- 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
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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
- 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
- G01S13/003—Bistatic radar systems; Multistatic radar systems
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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
- 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
- G01S13/66—Radar-tracking systems; Analogous systems
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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
- G01S7/024—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using polarisation effects
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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
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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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 belongs to the field of outer transmitter-based radars, and relates to an outer transmitter-based radar system based on multi-FM broadcasting and a detection method. The outer transmitter-based radar system based on the multi-FM broadcasting comprises receiving antennas connected in sequence, a simulation case containing a signal simulating and receiving module, a CPCI case containing a signal collecting and processing module, at least one disk array case containing a signal storage module, a switch and a signal processing machine carrying out signal processing. A multi-FM broadcasting irradiation source adopted by the system has multi-frequency, multi-station and multi-polarization characteristics, a multi-polarization mode is adopted by the receiving antennas, a radio frequency direct sampling structure is adopted for simulating and receiving, a radio frequency band-pass sampling and digital downconversion scheme is adopted by data collection, a high-speed disk array is adopted for data storing, the signal processing machine completes clutter rejection, mutual fuzzy function operation, peak value detection, constant false alarm rate detection, locating and tracking, data fusion and other operations, and finally object distance, speed and azimuth information is output. The outer transmitter-based radar system based on the multi-FM broadcasting and the detection method have the advantages of being free of electromagnetic pollution, resistant to stealth, and high in detection stability and tracking continuity.
Description
Technical field
The present invention relates to external radiation source field of radar, relate in particular to a kind of system and signal processing method that utilizes many frequency modulation broadcastings irradiation source detection of a target.
Background technology
External radiation source radar (claiming again passive radar) is the Bistatic/Multistatic Radar System of the electromagnetic signal detection of a target launched of a kind of third party of utilization, not emitted energy of this radar itself, but the electromagnetic signal of the non-cooperating type radiation source that receiving target reflects passively positions and follows the tracks of target.Conventional business irradiation source has analog broadcasting (FM), digital broadcasting (digital am broadcast DRM, digital audio broadcasting DAB, digital television broadcasting DVB-T, China Mobile multimedia broadcasting CMMB and DTTB DTMB), wireless network WIFI, GPS navigation satellite etc.Wherein, frequency modulation broadcasting external radiation source radar is because of the extensive concern of advantage the is subject to domestic and international research institution such as environmental protection, coverage are large and anti-stealthy ability is strong, development in recent years is swift and violent, and typical business system has " reticent sentry " and the French HA100 of the U.S..
But the source of frequency modulation broadcasting external radiation at present radar is many based on single-frequency list station single polarization work pattern: the reference signal that receives direct-path signal only contains a FM radio station, and the monitor signal of receiving target echoed signal only has a kind of polarization mode.This mode of operation still faces many problems:
1. its waveform is affected by broadcasted content, radar less stable
FM signal essence is to control carrier signal frequency deviation by modulation signal amplitude to make carrier frequency and modulation signal after modulation linear.The less carrier signal frequency deviation of modulation signal amplitude is less, and carrier signal effective bandwidth is less, and distance by radar resolution is poorer, and signal is not more suitable for target detection.Broadcast singal content is made up of voice, music and quiet section, and modulation signal changes in amplitude is obvious, causes the broadcast singal effective bandwidth moment to change, and radar job stability is poor.
2. signal bandwidth is less, distance by radar lack of resolution
Stereophonic FM broadcasting standard regulation, when FM signal 100% is modulated, frequency deviation is ± 75kHz, now signal occupied frequency bandwidth is 150kHz.In fact, FM signal very little work is in full modulation condition, and signal effective bandwidth is far smaller than 150kHz.And digital broadcast signal bandwidth is generally in MHz magnitude, be far longer than FM signal bandwidth.Compared with digital signal, FM signal range resolution is lower.
But frequency modulation broadcasting has the inherent advantage of multifrequency, multistation, multipolarization, this not only provides advantage for addressing the above problem, and provides broad development space for frequency modulation broadcasting external radiation source radar.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of system and signal processing method that utilizes many frequency modulation broadcastings irradiation source detection of a target.
For achieving the above object, technical scheme of the present invention is:
An external radiation source radar system based on many frequency modulation broadcastings, comprises the receiving antenna connecting successively, comprises
The simulation cabinet of signal imitation receiving unit, the CPCI cabinet that comprises signal acquisition process assembly, at least one dish battle array cabinet, switch and the signal processor that carries out signal processing of comprising signal storage assembly.
Described receiving antenna comprises the reference antenna and the prison that are made up of vertical polarized antenna and horizontally-polarized antenna respectively
Observation line; Reference antenna receives the reference signal in vertical polarization radio station and horizontal polarization radio station, and monitoring aerial receives monitor signal.
Described signal imitation receiving unit comprise the multichannel analog receiving front-end that is connected with described receiving antenna and
A steady low crystal oscillator of making an uproar mutually of superelevation.
Described signal acquisition process assembly comprise one surely low with above-mentioned multichannel analog receiving front-end, superelevation respectively
The multi-channel data acquisition board that the crystal oscillator of making an uproar mutually connects, the optical fiber interface signal-processing board card being connected with described multi-channel data acquisition board respectively, CPCI main frame board; Described CPCI motherboard cartoon is crossed above-mentioned switch and is connected with signal processor.
A described dish battle array cabinet comprises with above-mentioned optical fiber interface signal-processing board and links the PCI-E Fiber Interface Card connecing
And the disk array being connected with PCI-E Fiber Interface Card; Described disk array is connected with signal processor by above-mentioned switch.
A detection method for external radiation source radar system based on many frequency modulation broadcastings, comprises following steps,
Step 1, passes through antenna reception FM signal by multichannel analog receiving front-end, and carries out amplification filtering;
Step 2, the steady low crystal oscillator output fixed frequency clock of making an uproar mutually of superelevation, for multi-channel data acquisition board provides sampling clock; Multi-channel data acquisition board finishes receiving the signal of step 1, and it is carried out becoming hyperchannel baseband I/Q signal after radio frequency sampling, Digital Down Convert processing; And this hyperchannel baseband I/Q signal is transferred to signal processor by optical fiber interface signal-processing board card, PCI-E Fiber Interface Card, disk array and switch successively carries out signal processing;
Step 3, signal processor carries out channel selection processing to the hyperchannel baseband I/Q signal in step 2, filters out the reference signal and the monitor signal that carry single-frequency list station single polarization information;
Step 4, signal processor carries out clutter inhibition to the monitor signal completing in step 3 after channel selection operation;
Step 5, in signal processor calculation procedure 4, in monitor signal and step 3, the mutual ambiguity function of reference signal obtains range Doppler spectrum;
Step 6, signal processor carries out peak value detection to the range Doppler spectrum in step 5, and all peak values of adjusting the distance in doppler spectral carry out CFAR detection, removes false target and obtains needing the target of following the tracks of;
Step 7, signal processor positions tracking to the target in step 6;
Step 8, repeating step 3-7, until signal processor obtains the target information under all frequencies, polarization, erect-position condition;
Step 9, signal processor merges all target informations in step 8, export target information.
In described step 2, be broadband signal through Digital Down Convert hyperchannel baseband I/Q signal after treatment, in effective bandwidth, comprise multiple FM broadcast station signals.
Described method is utilized many frequency modulation broadcastings irradiation source detection of a target; The many frequency modulation broadcastings irradiation source utilizing self has the character of multifrequency multistation multipolarization.
The present invention is compared with the existing external radiation source radar based on frequency modulation broadcasting, and tool has the following advantages: 1, make full use of multiple frequency modulation broadcasting irradiation source resources, system works stability is strengthened; 2, by the target echo signal fusion treatment under different frequency, different polarization, different illumination angle, improve target detection performance and Anti-Stealth Radar Technology ability; 3, multistation colocated, improves target location accuracy.
Brief description of the drawings
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is the structural principle schematic diagram that the present invention simulates receiving front-end embodiment.
Fig. 3 is the structural principle schematic diagram of multi-channel data acquisition board embodiment of the present invention.
Fig. 4 is the structural principle schematic diagram of optical fiber interface signal-processing board card embodiment of the present invention.
Fig. 5 is the process flow diagram of the inventive method embodiment.
Fig. 6 is the wideband baseband signal frequency spectrum after radio frequency sampling in the embodiment of the present invention.
Fig. 7 is the process flow diagram that the inventive method channel selection realizes embodiment.
Fig. 8 is the separate unit base-band signal spectrum after channel selection in the embodiment of the present invention.
Fig. 9 is bistatic range Doppler spectrum after embodiment of the present invention clutter suppresses.
Figure 10 is the Targets Dots figure after embodiment of the present invention dual-frequency data merges.
Figure 11 is the Targets Dots figure after embodiment of the present invention multipolarization data fusion.
Embodiment
System of the present invention as shown in Figure 1, comprises receiving antenna, simulation cabinet, CPCI cabinet, dish battle array cabinet, switch, signal processor.
In the present embodiment, receiving antenna is made up of 4 Yagi antennas: 2 reference antennas of 2 monitoring aerials.2 monitoring aerials adopt respectively vertical polarization and horizontal polarization mode to set up, and point to same monitoring direction.Reference antenna 1 adopts vertical polarization mode to set up, directed in orthogonal polarized signal transmitting station; Reference antenna 2 adopts horizontal polarization mode to set up, and points to horizontal polarization signal transmitting station
In the present embodiment, analog machine case comprises the steady low crystal oscillator of making an uproar mutually of multichannel analog receiving front-end and superelevation, and the wherein steady low crystal oscillator output 80MHz clock of making an uproar mutually of superelevation, for multi-channel data acquisition board provides sampling clock.
Fig. 2 is a kind of embodiment of simulation receiving front-end.This AFE (analog front end) adopts radio frequency Direct Sampling structure, and the original signal of antenna reception is exported the radiofrequency signal of 88-108MHz after amplification filtering.
In the present embodiment, CPCI cabinet comprises 3 multi-channel data acquisition boards, 1 optical fiber interface signal-processing board card and 1 CPCI main frame board.Wherein CPCI motherboard cartoon is crossed the total line traffic control multi-channel data acquisition of CPCI board and is started or stoped sampling.
Fig. 3 is a kind of embodiment of multi-channel data acquisition board.Wherein FPGA internal digital down coversion DDC module comprises digital controlled oscillator NCO, multiplier, FIR decimation filter, and the IP core that it provides by altera corp completes; Sine and the cosine signal of above-mentioned NCO output 20MHz, mix base band by intermediate-freuqncy signal; Above-mentioned FIR decimation filter adopts two-stage FIR filtering extraction, and first order cut-off frequecy of passband is 4MHz, and stopband cutoff frequency is 10MHz, extracts 4 times, and second level cut-off frequecy of passband is 4MHz, and stopband cutoff frequency is 5MHz, extracts 2 times.
Fig. 4 is a kind of embodiment of optical fiber interface signal-processing board card.Wherein DSP selects the TS201 of ADI company, and this chip receives 18 channel datas of multi-channel data acquisition board transmission by link port.First the data of DSP1 receiving cable 0～4, the data of DSP2 receiving cable 6～10, the data of DSP3 receiving cable 5 and 12～14, the data of DSP4 receiving cable 11 and 15～17, then FPGA presses the unit packing of 2MB to the data that receive, and add channel number and packet count number to packet, finally the data after packing are sent to PCI-E Fiber Interface Card by optical fiber interface.FPGA1 be responsible for the packing data of DSP1 and DSP2, FPGA2 be responsible for the packing data of DSP3 and DSP4.
In the present embodiment, dish battle array cabinet comprises PCI-E Fiber Interface Card and disk array.Wherein PCI-E Fiber Interface Card uses the Virtex5 FPGA of Xilinx company, by PCIE IP core and dish battle array host communication, adopts DDR2 SDRAM as data buffer storage simultaneously; Disk array memory capacity is 16TB, and continuous recording speed reaches 750MB/s, and peak velocity reaches 800MB/s.The workflow of dish battle array cabinet is: optical fiber interface signal-processing board cartoon is crossed Optical Fiber Transmission data to PCI-E Fiber Interface Card DDR2 internal memory, and dish battle array host-initiated DMA reads and be saved to disk array.
In the present embodiment, signal processor is the control of whole system and processes core.It starts or stops sampling by LAN (Local Area Network) control CPCI cabinet, console panel battle array cabinet record data; Access the data in disk array and process the information that obtains target by network mapping.
Fig. 5 is a specific embodiment of the inventive method.
In the present embodiment, after the radiofrequency signal that reception signal becomes 88-108MHz through amplification filtering, adopt 80MHz frequency bandpass sampling, the I/Q baseband signal that is then 10MHz through Digital Down Convert output sampling rate, corresponding original signal frequency band is 95-105MHz.Fig. 6 is the wideband baseband signal frequency spectrum obtaining after sampling, wherein comprises 7 FM radio station.
Fig. 7 is a kind of embodiment of channel selection processing.Wideband baseband signal is first removed radio signals to be chosen to zero-frequency place through frequency mixer, then the separate unit baseband signal that is 500kHz through Digital Down Convert output sampling rate.Fig. 8 is the separate unit base-band signal spectrum of finally choosing.
In the present embodiment, the reference signal in vertical polarization radio station is obtained by the baseband signal of passage 1, and the reference signal in horizontal polarization radio station is obtained by the baseband signal of passage 2.The monitor signal of vertical polarization is obtained by the baseband signal of passage 3, and the monitor signal of horizontal polarization is obtained by the baseband signal of passage 4.
In the present embodiment, clutter suppresses to adopt time-domain filtering method.Fig. 9 is bistatic range Doppler spectrum after clutter suppresses.Visible substrate reduction after clutter suppresses, target highlights.
Figure 10 is the Targets Dots figure after dual-frequency data merges.After the dual-frequency data that same monitoring channel receives is processed fusion, Targets Dots is more continuous, and system works stability strengthens.
Figure 11 is the Targets Dots figure after multipolarization data fusion.The target echo signal in same irradiation radio station is received by horizontal polarization, vertical polarized antenna respectively, and after signal is processed fusion, Targets Dots is more continuous, and system works stability strengthens.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art in the invention can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (8)
1. the external radiation source radar system based on many frequency modulation broadcastings, it is characterized in that: comprise the receiving antenna connecting successively, the simulation cabinet that comprises signal imitation receiving unit, the CPCI cabinet that comprises signal acquisition process assembly, at least one dish battle array cabinet, switch and the signal processor that carries out signal processing of comprising signal storage assembly.
2. a kind of external radiation source radar system based on many frequency modulation broadcastings according to claim 1, is characterized in that: described receiving antenna comprises the reference antenna and the monitoring aerial that are made up of vertical polarized antenna and horizontally-polarized antenna respectively; Reference antenna receives the reference signal in vertical polarization radio station and horizontal polarization radio station, and monitoring aerial receives monitor signal.
3. a kind of external radiation source radar system based on many frequency modulation broadcastings according to claim 1, is characterized in that: described signal imitation receiving unit comprises the multichannel analog receiving front-end and the steady low crystal oscillator of making an uproar mutually of superelevation that are connected with described receiving antenna.
4. a kind of external radiation source radar system based on many frequency modulation broadcastings according to claim 3, it is characterized in that: described signal acquisition process assembly comprises a multi-channel data acquisition board being connected with above-mentioned multichannel analog receiving front-end, the steady low crystal oscillator of making an uproar mutually of superelevation respectively, the optical fiber interface signal-processing board card being connected with described multi-channel data acquisition board respectively, CPCI main frame board; Described CPCI motherboard cartoon is crossed above-mentioned switch and is connected with signal processor.
5. a kind of external radiation source radar system based on many frequency modulation broadcastings according to claim 4, is characterized in that: a described dish battle array cabinet comprises with above-mentioned optical fiber interface signal-processing board and links the PCI-E Fiber Interface Card connecing and the disk array being connected with PCI-E Fiber Interface Card; Described disk array is connected with signal processor by above-mentioned switch.
6. a signal processing method for the external radiation source radar system based on many frequency modulation broadcastings, is characterized in that: comprise following steps,
Step 1, passes through antenna reception FM signal by multichannel analog receiving front-end, and carries out amplification filtering;
Step 2, the steady low crystal oscillator output fixed frequency clock of making an uproar mutually of superelevation, for multi-channel data acquisition board provides sampling clock; Multi-channel data acquisition board finishes receiving the signal of step 1, and it is carried out becoming hyperchannel baseband I/Q signal after radio frequency sampling, Digital Down Convert processing; And this hyperchannel baseband I/Q signal is transferred to signal processor by optical fiber interface signal-processing board card, PCI-E Fiber Interface Card, disk array and switch successively carries out signal processing;
Step 3, signal processor carries out channel selection processing to the hyperchannel baseband I/Q signal in step 2, filters out the reference signal and the monitor signal that carry single-frequency list station single polarization information;
Step 4, signal processor carries out clutter inhibition to the monitor signal completing in step 3 after channel selection operation;
Step 5, in signal processor calculation procedure 4, in monitor signal and step 3, the mutual ambiguity function of reference signal obtains range Doppler spectrum;
Step 6, signal processor carries out peak value detection to the range Doppler spectrum in step 5, and all peak values of adjusting the distance in doppler spectral carry out CFAR detection, removes false target and obtains needing the target of following the tracks of;
Step 7, signal processor positions tracking to the target in step 6;
Step 8, repeating step 3-7, until signal processor obtains the target information under all frequencies, polarization, erect-position condition;
Step 9, signal processor merges all target informations in step 8, export target information.
7. a kind of external radiation source method for processing radar signals based on many frequency modulation broadcastings according to claim 6, it is characterized in that: in described step 2, be broadband signal through Digital Down Convert hyperchannel baseband I/Q signal after treatment, in effective bandwidth, comprise multiple FM broadcast station signals.
8. a kind of external radiation source method for processing radar signals based on many frequency modulation broadcastings according to claim 6, is characterized in that: utilize many frequency modulation broadcastings irradiation source detection of a target; The many frequency modulation broadcastings irradiation source utilizing self has the character of multifrequency multistation multipolarization.
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Cited By (11)
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| CN104793203A (en) * | 2015-04-17 | 2015-07-22 | 中南大学 | Data fusion method used for multi-frequency multichannel ground penetrating radar |
| CN104865569A (en) * | 2015-05-29 | 2015-08-26 | 武汉大学 | Aircraft target recognition method based on single frequency network passive radar |
| CN105425225A (en) * | 2016-01-14 | 2016-03-23 | 中国人民解放军国防科学技术大学 | Passive radar low-altitude object detection method |
| CN105842654A (en) * | 2016-03-23 | 2016-08-10 | 上海斐讯数据通信技术有限公司 | Method and device for determining position of the other side |
| CN106646389A (en) * | 2016-12-19 | 2017-05-10 | 北京航天测控技术有限公司 | Airborne radar clutter recorder |
| CN106970382A (en) * | 2017-03-22 | 2017-07-21 | 武汉大学 | One kind is based on external illuminators-based radar unmanned plane real-time monitoring system and method |
| CN107102318A (en) * | 2017-05-16 | 2017-08-29 | 武汉大学 | A kind of digital audio broadcasting external illuminators-based radar target detection system and method |
| CN108896976A (en) * | 2018-07-05 | 2018-11-27 | 电子科技大学 | A kind of coherent processing method for multichannel external illuminators-based radar |
| CN108896985A (en) * | 2018-06-11 | 2018-11-27 | 南京航空航天大学 | Based on the stealthy radar network multiple target tracking sampling interval control method of radio frequency |
| CN109061590A (en) * | 2018-07-19 | 2018-12-21 | 武汉大学 | A kind of radar reference signal detecting method based on blind adaptive oblique projection |
| CN116755093A (en) * | 2023-08-18 | 2023-09-15 | 中国电子科技集团公司第十四研究所 | Method, device and computer medium for improving scanning polarization SAR blurring |
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| CN104793203A (en) * | 2015-04-17 | 2015-07-22 | 中南大学 | Data fusion method used for multi-frequency multichannel ground penetrating radar |
| CN104865569A (en) * | 2015-05-29 | 2015-08-26 | 武汉大学 | Aircraft target recognition method based on single frequency network passive radar |
| CN104865569B (en) * | 2015-05-29 | 2017-06-09 | 武汉大学 | A kind of Aircraft Target Recognition based on SFN external illuminators-based radar |
| CN105425225A (en) * | 2016-01-14 | 2016-03-23 | 中国人民解放军国防科学技术大学 | Passive radar low-altitude object detection method |
| CN105842654A (en) * | 2016-03-23 | 2016-08-10 | 上海斐讯数据通信技术有限公司 | Method and device for determining position of the other side |
| CN106646389A (en) * | 2016-12-19 | 2017-05-10 | 北京航天测控技术有限公司 | Airborne radar clutter recorder |
| CN106970382B (en) * | 2017-03-22 | 2019-08-02 | 武汉大学 | One kind being based on external illuminators-based radar unmanned plane real-time monitoring system and method |
| CN106970382A (en) * | 2017-03-22 | 2017-07-21 | 武汉大学 | One kind is based on external illuminators-based radar unmanned plane real-time monitoring system and method |
| CN107102318B (en) * | 2017-05-16 | 2019-09-10 | 武汉大学 | A kind of digital audio broadcasting external illuminators-based radar target detection system and method |
| CN107102318A (en) * | 2017-05-16 | 2017-08-29 | 武汉大学 | A kind of digital audio broadcasting external illuminators-based radar target detection system and method |
| CN108896985A (en) * | 2018-06-11 | 2018-11-27 | 南京航空航天大学 | Based on the stealthy radar network multiple target tracking sampling interval control method of radio frequency |
| CN108896985B (en) * | 2018-06-11 | 2022-07-22 | 南京航空航天大学 | Networking radar multi-target tracking sampling interval control method based on radio frequency stealth |
| CN108896976A (en) * | 2018-07-05 | 2018-11-27 | 电子科技大学 | A kind of coherent processing method for multichannel external illuminators-based radar |
| CN109061590A (en) * | 2018-07-19 | 2018-12-21 | 武汉大学 | A kind of radar reference signal detecting method based on blind adaptive oblique projection |
| CN116755093A (en) * | 2023-08-18 | 2023-09-15 | 中国电子科技集团公司第十四研究所 | Method, device and computer medium for improving scanning polarization SAR blurring |
| CN116755093B (en) * | 2023-08-18 | 2023-10-31 | 中国电子科技集团公司第十四研究所 | Method, device and computer medium for improving scanning polarization SAR blurring |
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