CN105572665A - Coast defense searching radar system - Google Patents
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- CN105572665A CN105572665A CN201510919105.1A CN201510919105A CN105572665A CN 105572665 A CN105572665 A CN 105572665A CN 201510919105 A CN201510919105 A CN 201510919105A CN 105572665 A CN105572665 A CN 105572665A
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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
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
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Abstract
The invention discloses a coast defense searching radar system. The radar system comprises an antenna extension set and a receiving/frequency synthesizing processing extension set. The antenna extension set comprises an antenna array face, a receiving and sending module, a motor and a transmission mechanism. The receiving/frequency synthesizing processing extension set comprises a processing module, a receiving/frequency synthesizing module, a servo controller and a power module. The antenna extension set is connected with the receiving/frequency synthesizing module of the receiving/frequency synthesizing module processing extension set via the receiving and sending module. The antenna extension set is connected with the servo controller in the receiving/frequency synthesizing module processing extension set via the motor and the transmission mechanism. The power module is used for providing power for all parts of the radar system. According to the invention, by adopting the advanced pulse compression processing technology, peak power of emission pulse signals of a radar is greatly reduced; by use of a small-power solid-state transmitter, power amplification requirements can be met; and the radar system is advantaged by low cost, reliability of the radar is greatly improved and service lifetime of the radar is greatly extended.
Description
Technical field
The present invention relates to radar system, be specifically related to a kind of coast defence search radar system.
Background technology
The surveillance radar that current national coastal provinces border defence police substation adopts mostly is traditional imaging radar, this kind of radar and marine navigation radar similar, its basic scheme is by carrying out Radar Imaging Processing to monitoring marine site, follow the tracks of Ship Target by scope head according to radar image artificial judgment and vision again, and form the flight path course of target by the mode that tail postpones to show.
The major technique adopted in such radar is that pulsed radar one-dimensional distance is to imaging technique, by carrying out clutter reduction process to a frame radar echo signal, and in range dimension, calculate the performance number of sector elementary echo, and determine power grade, then according to color kind or the gray shade scale of the pixel on power grade determination display device, thus a colour or single gray scale radar RBM sweep trace is formed.Along with radar antenna in orientation to continuous scanning, thus formed a view picture radar RBM video image.
The high-power transponder pulse that such radar adopts width extremely narrow and wider signal bandwidth, therefore have higher range resolution and larger distance measurement ranges.Adopt the antenna of narrower azimuth beamwidth and high-precision antenna scanning servo-drive system, thus there is higher angular resolution and angle-measurement accuracy.And carry out imaging processing by digital signal processing method, make echoed signal can obtain efficient analyzing and processing, significantly improve the detectivity of Small object.The colored echo display effect of high definition is also provided convenience for the identification of scope head's succeeding target and trace analysis.
Because the type radar is still confined to system and the process framework of conventional navigation radar, to echo analysis process, imaging is carried out to sea-surface target mainly through one-dimensional distance, do not adopt advanced target detection and follow the tracks for the treatment of technology, therefore cannot automatically detect the Ship Target on sea and identify, and cannot the movement tendency of target be followed the tracks of and be predicted.In observation process, need the continual observation on duty of scope head, and carry out judging, identify and following the tracks of, thus cause monitoring false-alarm/false dismissed rate high, target localization poor accuracy, a series of shortcomings such as observation person's work load is large.In addition, the type radar transmitter adopts the traditional pulse system of high-peak power, low pulse width, do not adopt the advanced signal processing technologies such as pulse compression, therefore the conventional high power such as magnetron or travelling-wave tube radar pulse emitter is needed, thus add system cost, and reduce reliability and the life-span of radar.As fully visible, the type radar has not met the related performance indicators requirement of current national land and sea border defense office to coast defence search radar.
Summary of the invention
For the deficiencies in the prior art, the invention discloses a kind of coast defence search radar system.
Technical scheme of the present invention is as follows:
A kind of coast defence search radar system, comprises antenna extension set and reception/frequency combines process extension set;
Described antenna extension set comprises antenna array, transceiver module and motor and gear train; Described transceiver module comprises the second transmit-receive switch, power amplifier and LNA; Described power amplifier and LNA are all connected with described antenna array; Described second transmit-receive switch is connected to transceiver module and reception/frequency is combined between process extension set;
Described reception/frequency is combined process extension set and is comprised processing module, reception/frequency comprehensive module, servo controller and power module; Described processing module comprises AD sampling, FPGA and DSP; Described reception/frequency is combined module and is comprised Frequency Synthesizer and receive main channel; Described reception main channel comprises the first transmit-receive switch, the first single-conversion, the first double conversion and the first filter and amplification, one end of described first transmit-receive switch connects the second transmit-receive switch in transceiver module, the other end connects the input end of described first single-conversion, the output terminal of the first single-conversion connects the input end of the first double conversion, and the output terminal of the first double conversion connects the input end of the first filter and amplification; Described servo controller comprises servocontrol driver module and transformer module; The various piece that described power module is radar system provides power supply;
The output terminal of described first filter and amplification connects described AD and samples; The output terminal of described AD sampling connects the input end of FPGA, and the output terminal of FPGA connects the input end of DSP;
Described Frequency Synthesizer connects FPGA, DSP, the first transmit-receive switch, the first single-conversion and the first double conversion respectively.
Its further technical scheme is: described Frequency Synthesizer comprises DDS and microwave control panel, the second filter and amplification, the second single-conversion, the second double conversion, merit are divided, crystal oscillator, up-conversion local oscillator, DDS clock, AD sampling clock and receive local oscillator;
The output terminal of described crystal oscillator connects the input end that merit is divided, and described merit is divided and comprised four output terminals, connects up-conversion local oscillator, DDS clock, AD sampling clock respectively and receives local oscillator; Described up-conversion local oscillator comprises two output terminals, connects the second single-conversion and the second double conversion respectively; The output terminal of described DDS clock connects DDS and microwave control panel; The output terminal of described AD sampling clock connects AD sampling; Described reception local oscillator comprises two output terminals, connects the first single-conversion and the first double conversion respectively;
The output terminal of described DDS and microwave control panel connects the input end of the second double conversion, and the output terminal of described second double conversion connects the input end of the second single-conversion, and the output terminal of described second single-conversion connects the input end of the second filter and amplification; The output terminal of the second filter and amplification connects the first transmit-receive switch; Described DDS and microwave control panel are also connected with FPGA.
Its further technical scheme is: described processing module comprises AD sampling, FPGA and DSP; Described FPGA comprises Timing Synchronization, reception/frequency combines module control, Digital Down Convert, data record and scan control; Described DSP comprises pulse compression, non-inherent accumulation, target detection, Targets Dots process, targetpath process, target association filtering, targetpath merges, target data exports, data are packed and Video processing;
Described Timing Synchronization receives the signal of described Frequency Synthesizer, and described reception/frequency is combined module and controlled to send signal to described Frequency Synthesizer; The output terminal of described AD sampling connects the input end of Digital Down Convert, the output terminal of described Digital Down Convert connects the input end of pulse compression, described pulse compression output terminal connect the input end of non-inherent accumulation, described non-inherent accumulation comprises two output terminals, and linking objective detects and Video processing respectively; Described target detection, Targets Dots process, targetpath process, target association filtering, targetpath merging, target data output and data packing are connected successively; The output terminal connection data packing of described Video processing.
Advantageous Effects of the present invention is:
1. considerably reduce the peak power of transponder pulse signal.Adopt advanced process of pulse-compression technology, the peak power of radar transmitted pulse signal significantly being reduced, power amplification demand can be realized by adopting low power solid state transmitter.And solid state transmitter is compared with traditional magnetron or travelling-wave tube high-power transmitter, on the one hand there is larger cost advantage, on the other hand, also substantially increase reliability and the serviceable life of radar.
2. considerably reduce work difficulty and the burden of radar monitoring personnel.By taking signal transacting and the data processing technique of the advanced persons such as non-inherent accumulation, CFAR CFAR target detection, TWS multiple target tracking, radar can automatically detect the Ship Target on sea and identify, and follows the tracks of the movement locus of target and trend and predict.In observation process, without the need to scope head's observation on duty, without the need to artificial judgment, identification and tracking, and there is extremely low false-alarm/false dismissal probability, target localization and tracking accuracy higher.
3. significantly improve ocean clutter cancellation performance.By taking frequency agility transmit-receive technology between arteries and veins, greatly reduce the correlativity between sea clutter, and by the non-inherent accumulation algorithm of optimum and the CFAR CFAR object detector of applicable sea clutter characteristic, improve the rejection to sea clutter further, thus greatly reduce sea clutter to radar imagery quality, the impact of target detection and tracking performance.
By taking design proposal of the present invention, radar system can reach following performance index:
A) sweep velocity: 50 °/s;
B) investigative range: ± 135 °;
C) distance range: 16km;
D) detection range: 10km;
E) range resolution: 30m;
F) distance accuracy: 25m;
G) angle measurement accuracy: 0.5 °;
H) Targets Dots number is searched at most: 500;
I) tracking target point mark number while of at most: 64.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is the structured flowchart of Frequency Synthesizer.
Fig. 3 is the structured flowchart of processing module.
Embodiment
Fig. 1 is structured flowchart of the present invention.As shown in Figure 1, the present invention includes antenna extension set 1 and receive/frequently combine and process extension set 2.
Antenna extension set 1 comprises antenna array 11, transceiver module 12 and motor and gear train 13.
Antenna extension set 1 mainly completes the functions such as the radiation of radar radiofrequency signal, the reception of target echo and antenna scanning transmission.In antenna extension set 1 each several part composition and basic functional principle as follows:
Antenna array 11 comprises dull and stereotyped Slot array and feeding network, mainly completes radiation and the reception of radar radiofrequency signal.The radio-frequency pulse exported after power amplifier process in transceiver module 12 transmits, and is transferred in the feeding network in antenna array 11, through dull and stereotyped Slot array to external radiation by waveguide assemblies.The echoed signal that radar target reflects, the LNA delivered to after being received by antenna array 11 in transceiver module 12 carries out low noise amplification.
Transceiver module 12 comprises transmission channel and receiving cable, and is connected by the second transmit-receive switch and the comprehensive module of reception/frequency.Wherein transmission channel comprises power amplifier, and receiving cable comprises LNA.Power amplifier and LNA are all connected with antenna array 11 by waveguide assemblies.The transmission channel of transceiver module 12 will receive/frequently combine rf excitation signal that module provides after power amplifier process, and power amplification, is sent to antenna array 11 and launches.The receiving cable of transceiver module 12 is then received echoed signal mainly through LNA docking and is carried out low noise amplification process.Transmit enable pulse in transceiver module 12, premodulation/disabling pulse are then provided by the DDS receiving/frequently combine in module and microwave control panel.
Also comprise servo control mechanism in antenna extension set 1, servo control mechanism comprises motor and gear train 13.Motor and gear train 13 comprise motor and gear train.Motor adopts stepper motor, and gear train mainly comprises transmission main shaft and turntable.Receive the servo controller frequently combined/process in extension set and produce step motor control drive singal, complete the motion control to stepper motor.Stepper motor again by transmission main shaft driven antenna front 11 carry out orientation to scanning.
Receive/frequently combine process extension set 2 and comprise processing module 21, reception/frequently combine module 22, servo controller 23 and power module 24.Reception/frequently combine process extension set 2 mainly complete the generation of transmitting pumping signal, the down coversion receiving echo, AD sampling, target detection and follow the tracks of the functions such as process, also completes scan control and system power supply in addition.
Receive/frequently combine module 22 comprise Frequency Synthesizer 211 and receive main channel 222.
Receive main channel 222 and comprise the first transmit-receive switch 2221, first single-conversion 2222, first double conversion 2223 and the first filter and amplification 2224.One end of first transmit-receive switch 2221 connects the second transmit-receive switch in transceiver module 12, the other end connects the input end of the first single-conversion 2222, the output terminal of the first single-conversion 2222 connects the input end of the first double conversion 2223, and the output terminal of the first double conversion 2223 connects the input end of the first filter and amplification 2224.First filter and amplification 2224 output terminal connects the input end of AD sampling 213.
First single-conversion 2222 and the first double conversion 2223 carry out two-stage down-converted to the radiofrequency signal received successively, radiofrequency signal after first filter and amplification 2224 pairs down-converted carries out filter and amplification, exports intermediate-freuqncy signal to processing module 21 and carries out AD sampling and follow-up signal and data processing.Wherein, in the first single-conversion 2222, relieve the impact of frequency agility between arteries and veins, the intermediate-freuqncy signal that output center frequency is fixing.
Fig. 2 is the structured flowchart of Frequency Synthesizer.Frequency Synthesizer 221 comprises DDS and microwave control panel 2210, second filter and amplification 2221, second single-conversion 2212, second double conversion 2213, merit divides 2214, crystal oscillator 2215, up-conversion local oscillator 2216, DDS clock 2217, AD sampling clock 2218 and receive local oscillator 2219.
The output terminal of crystal oscillator 2215 connects the input end that merit divides 2214, and merit divides 2214 to comprise four output terminals, connects up-conversion local oscillator 2216, DDS clock 2217, AD sampling clock 2218 respectively and receives local oscillator 2219.Up-conversion local oscillator 2216 comprises two output terminals, connects the second single-conversion 2212 and the second double conversion 2213 respectively.The output terminal of DDS clock 2217 connects DDS and microwave control panel 2210.The output terminal of AD sampling clock 2218 connects the input end of AD sampling 213.Receive local oscillator 2219 and comprise two output terminals, connect the first single-conversion 2222 and the first double conversion 2223 respectively.
DDS in Frequency Synthesizer 221 and microwave control panel 2210, for generation of the linear FM signal of prescribed bandwidth and chirp rate, send signal as radar mean frequency.
Frequency Synthesizer 221 is provided up-conversion local oscillation signal, DDS reference clock signal, AD sampled clock signal respectively by up-conversion local oscillator 2216, DDS clock 2217, AD sampling clock 2218 and reception local oscillator 2219 and is received local oscillation signal.Wherein up-conversion local oscillation signal is the mixing local vibration source of sendaisle, receive the mixing local vibration source that local oscillation signal is receiving cable, AD sampled clock signal is used as the sampling clock benchmark of analog to digital converter in processing module 21, and DDS reference clock signal is assisted DDS and microwave control panel 2210 to produce intermediate frequency and sent waveform.
Frequency Synthesizer 221 comprises up-conversion passage.Second filter and amplification 2221, second single-conversion 2212 and the second double conversion 2213 form up-conversion passage, main intermediate-freuqncy signal DDS and microwave control panel 2210 produced carries out twice upconversion process by the second single-conversion 2212 and the second double conversion 2213, transform to radar emission frequency range, then launch frequency agility between arteries and veins by completing after the second filter and amplification 2221 filter amplifying processing.
DDS and microwave control panel 2210 also complete radar timing signal for generating, the timing reference signal provided according to Frequency Synthesizer 221 produces the various time synchronization signals needed for radar work, comprises PRF, Transmit enable pulse, launches modulating pulse, disabling pulse, frequency hopping trigger pulse, frame pulse etc.Meanwhile, DDS and microwave control panel 2210 also complete the control to receiving/frequently combining module 22 and antenna extension set 1.
To sum up: Frequency Synthesizer 221 is mainly each unit and provides reference clock and local oscillation signal, and the frequency hopping trigger pulse that can provide according to DDS wherein and microwave control panel 2210 controls a local oscillation signal carries out frequency agility between arteries and veins.
Fig. 3 is the structured flowchart of processing module.Processing module 21 comprises AD sampling 213, FPGA212 and DSP211.Processing module 21 is for completing the functions such as Radar IF Echo AD sampling, Digital Down Convert, object detecting and tracking process, radar main control, System self-test.The output terminal of AD sampling 213 connects the output terminal connection DSP211 of FPGA212, FPGA212.
FPGA212 comprises Timing Synchronization 2121, receives/comprehensive module control 2122, Digital Down Convert 2123, data record 2124 and scan control 2125 frequently.DSP211 comprises pulse compression 2118, non-inherent accumulation 2119, target detection 2117, Targets Dots process 2111, targetpath process 2112, target association filtering 2113, targetpath merging 2114, target data output 2115, data packing 2116, Video processing 2110.
Timing Synchronization 2121 receives the signal of Frequency Synthesizer 221, receives/frequently combines module control 2122 and send signal to Frequency Synthesizer 221.The output terminal of AD sampling 213 connects the input end of Digital Down Convert 2123, the output terminal of Digital Down Convert 2123 connects the input end of pulse compression 2118, the output terminal of pulse compression 2118 connects the input end of non-inherent accumulation 2119, non-inherent accumulation 2119 comprises two output terminals, and linking objective detects 2117 and Video processing 2110 respectively; Target detection 2117, Targets Dots process 2111, targetpath process 2112, target association filtering 2113, targetpath merging 2114, target data output 2115 and data packing 2116 are connected successively; The output terminal also connection data packing 2116 of Video processing 2110.
AD sampling 213 is sampled to reception echo signal of intermediate frequency, is transformed to numeric field.First Digital Down Convert 2123 in FPGA212 carries out Digital Down Convert process to the signal after AD sampling 213 process, echo signal of intermediate frequency is transformed into baseband signal, and is sent in DSP211.
DSP211 carries out a series of signal and the data processing work such as pulse compression, duopole filtering, non-inherent accumulation, the separation of land sea clutter, CFAR detection, Targets Dots and flight path processing to signal, recovers Targets Dots and flight path information.Above-mentioned processing procedure and computation process are prior art, directly can call existing module in software and realize.
In addition, the reception/frequency in FPGA212 is combined module control 2122 and is completed the control of reception/frequency being combined to module 22 by RS422/RS485 bus.Scan control 2125 in FPGA212 completes the controlling functions to servo controller 23 by RS422/RS485 bus.
By Ethernet communication between processing module 21 and coast defence watch-dog, report radar scanning RBM image, target data and trace information, scanning angle information etc., and accepting the Long-distance Control of coast defence supervisory system, Radar Displaying Console software is arranged in coast defence watch-dog.
Servo controller 23 comprises servocontrol driver module 231 and transformer module 232.The control command that servo controller 23 receiving processing module 21 is sent by RS485 bus, produces step motor control drive singal, completes the scan control to the stepper motor in motor and gear train 13.Servocontrol driver module 231 comprises servo control circuit and driver module, and servo control circuit produces control signal, after driver module amplifies, produce driving current signal, and Driving Stepping Motor moves.
Power module 24 provides power supply for radar system various piece.Power module 24, primarily of compositions such as AC/DC, DC/DC converter modules, produces DC supply type required in radar system, completes the centrally connected power supply to assembly each in radar system.
As follows to the main treatment scheme of signal in processing module 21:
The intermediate frequency digital I that Digital Down Convert 2123 pairs of AD samplings 213 obtain, Q signal carry out Digital Down Convert, are transformed to baseband signal;
Pulse compression 2118 pairs of baseband signals carry out process of pulse-compression, with the resolution characteristic that lower peak power reaches burst pulse, the traditional pulse radar of high-peak power has and detectivity;
Signal after non-inherent accumulation 2119 paired pulses compression 2118 process carries out duopole filtering process and realizes non-inherent accumulation, improves echoed signal signal to noise ratio (S/N ratio), suppresses sea clutter, and carry out land sea clutter separation.And signal after process is transferred to target detection 2117 and Video processing 2110 respectively.
The output signal of target detection 2117 pairs of non-inherent accumulation 2119 carries out time domain CFAR CFAR target detection, automatically detects the Ship Target on sea and identifies.
The point mark detected by output signal that Targets Dots process 2111, targetpath process 2112, target data association filtering 2113 and targetpath merge 2114 pairs of target detection 2117 is TWS and follows the tracks of process, automatically follows the tracks of the movement locus of the Ship Target on sea and trend and predicts.Afterwards the Signal transmissions after process is exported 2115 to target data.
Video processing 2110 and target data export 2115 all connection data packings 2116, radar detection image, Targets Dots, track data are reported coast defence watch-dog by data packing 2116, so that border defence worker monitors, and direct video process 2110 pairs of experimental datas carry out photoelectronic imaging.
The index of coast defence search radar most critical is detection range, proves the detection range of coast defence search radar below:
Adopt non-inherent accumulation mode, according to radar equation, radar horizon estimation equation is as follows:
By emission peak power P
tfor 10W, centre frequency corresponding wavelength is λ, system noise factor F
nfor 4dB, ensureing that false alarm rate is 10
-6, when detection probability is 50%, signal to noise ratio (S/N ratio) (S/N) gets 15dB, B
nfor 7MHz, antenna gain G is 33dB, and system loss (containing antenna house and range attenuation, link load) L is 9dB, and pulse accumulation number n gets 64.Long-pending (RCS) τ of object cross section on the less naval vessel that land and sea border defense administrative authority pays close attention to is taken as 50m
2.
As calculated, be 50m to RCS
2the maximum detectable range on naval vessel is 11.34km, is 30m to RCS
2the maximum detectable range on naval vessel is 10km, all meets the detection range index request of 10km.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive without departing from the spirit and concept in the present invention or associate, all should think and be included within protection scope of the present invention.
Claims (3)
1. a coast defence search radar system, is characterized in that: comprise antenna extension set (1) and receive/comprehensive process extension set (2) frequently;
Described antenna extension set (1) comprises antenna array (11), transceiver module (12) and motor and gear train (13); Described transceiver module (12) comprises the second transmit-receive switch, power amplifier and LNA; Described power amplifier and LNA are all connected with described antenna array (11); Described second transmit-receive switch is connected to transceiver module (12) and receives/frequently combine and processes between extension set (2);
Described reception/frequency is combined process extension set (2) and is comprised processing module (21), receives/comprehensive module (22), servo controller (23) and power module (24) frequently, described processing module (21) comprises AD sampling (213), FPGA (212) and DSP (211), described reception/frequency is combined module (22) and is comprised Frequency Synthesizer (211) and receive main channel (222), described reception main channel (222) comprises the first transmit-receive switch (2221), first single-conversion (2222), first double conversion (2223) and the first filter and amplification (2224), one end of described first transmit-receive switch (2221) connects the second transmit-receive switch in transceiver module (12), the other end connects the input end of described first single-conversion (2222), the output terminal of the first single-conversion (2222) connects the input end of the first double conversion (2223), the output terminal of the first double conversion (2223) connects the input end of the first filter and amplification (2224), described servo controller (23) comprises servocontrol driver module (231) and transformer module (232), the various piece that described power module (24) is radar system provides power supply,
The output terminal of described first filter and amplification (2224) connects described AD and samples (213); The output terminal of described AD sampling (213) connects the input end of FPGA (212), and the output terminal of FPGA (212) connects the input end of DSP (211);
Described Frequency Synthesizer (221) connects FPGA (212), DSP (211), the first transmit-receive switch (2221), the first single-conversion (2222) and the first double conversion (2223) respectively.
2. coast defence search radar system as claimed in claim 1, is characterized in that: described Frequency Synthesizer (221) comprises DDS and microwave control panel (2210), the second filter and amplification (2221), the second single-conversion (2212), the second double conversion (2213), merit divide (2214), crystal oscillator (2215), up-conversion local oscillator (2216), DDS clock (2217), AD sampling clock (2218) and reception local oscillator (2219);
The output terminal connection merit of described crystal oscillator (2215) divides the input end of (2214), described merit divides (2214) to comprise four output terminals, connects up-conversion local oscillator (2216), DDS clock (2217), AD sampling clock (2218) respectively and receives local oscillator (2219); Described up-conversion local oscillator (2216) comprises two output terminals, connects the second single-conversion (2212) and the second double conversion (2213) respectively; The output terminal of described DDS clock (2217) connects DDS and microwave control panel (2210); The output terminal of described AD sampling clock (2218) connects AD sampling (213); Described reception local oscillator (2219) comprises two output terminals, connects the first single-conversion (2222) and the first double conversion (2223) respectively;
The output terminal of described DDS and microwave control panel (2210) connects the input end of the second double conversion (2213), the output terminal of described second double conversion (2213) connects the input end of the second single-conversion (2212), and the output terminal of described second single-conversion (2212) connects the input end of the second filter and amplification (2211); The output terminal of the second filter and amplification (2211) connects the first transmit-receive switch (2221); Described DDS and microwave control panel (2210) are also connected with FPGA (212).
3. coast defence search radar system as claimed in claim 1, is characterized in that: described processing module (21) comprises AD sampling (213), FPGA (212) and DSP (211); Described FPGA (212) comprises Timing Synchronization (2121), receives/frequently combine module control (2122), Digital Down Convert (2123), data record (2124) and scan control (2125); Described DSP (211) comprises pulse compression (2118), non-inherent accumulation (2119), target detection (2117), Targets Dots process (2111), targetpath process (2112), target association filtering (2113), targetpath merges (2114), target data exports (2115), data pack (2116) and Video processing (2110);
Described Timing Synchronization (2121) receives the signal of described Frequency Synthesizer (221), and described reception/frequency is combined module control (2122) and sent signal to described Frequency Synthesizer (221); The output terminal of described AD sampling (213) connects the input end of Digital Down Convert (2123), the output terminal of described Digital Down Convert (2123) connects the input end of pulse compression (2118), described pulse compression (2118) output terminal connect non-inherent accumulation (2119) input end, described non-inherent accumulation (2119) comprises two output terminals, and linking objective detects (2117) and Video processing (2110) respectively; Described target detection (2117), Targets Dots process (2111), targetpath process (2112), target association filtering (2113), targetpath merge (2114), target data output (2115) and data packing (2116) and are connected successively; Output terminal connection data packing (2116) of described Video processing (2110).
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| CN113064124B (en) * | 2021-03-12 | 2022-04-01 | 广州辰创科技发展有限公司 | Signal synchronization assembly for remote radar detection system |
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