CN108020822A - High Speed Signal Processor System and its signal processing method for scene surveillance radar - Google Patents
High Speed Signal Processor System and its signal processing method for scene surveillance radar Download PDFInfo
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- CN108020822A CN108020822A CN201711005515.0A CN201711005515A CN108020822A CN 108020822 A CN108020822 A CN 108020822A CN 201711005515 A CN201711005515 A CN 201711005515A CN 108020822 A CN108020822 A CN 108020822A
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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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- 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
- G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
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Abstract
The invention belongs to Radar Signal Processing Technology field, more particularly to a kind of High Speed Signal Processor System and its signal processing method for scene surveillance radar.The present invention includes completely identical in structure A subordinate machine systems and B subordinate machine systems, the A subordinate machine systems and B subordinate machine systems are mutually redundant backup, two-way communication link between the A subordinate machine systems and B subordinate machine systems, A subordinate machine systems and B the subordinate machine systems two-way communication link between duplexer switch, two-way communication link between duplexer switch and antenna.When some equipment breaks down during radar is wherein a set of, system will reconfigure function automatically, will not reduce system performance, enhance the reliability of system.The present invention has higher distance and bearing resolution ratio, can continuously it start shooting for a long time, easy to the seamless switching between disparate modules, can quickly, it is reliable, accurately detect visibility at the airport, it ensure that the operational efficiency and level of security on the airport under any weather condition, improve Airport Operation efficiency.
Description
Technical field
The invention belongs to Radar Signal Processing Technology field, more particularly to a kind of high speed signal for scene surveillance radar
Processing system and its signal processing method.
Background technology
The development of recent decades Global Aviation Industry is quite rapid, and the scale of domestic airport grows stronger day by day, and causes to fly in airport
Machine landing number surges, and the volume of the flow of passengers is also being continuously increased, this inevitably result in aircraft in airport and take the number of activities of vehicle
It is more frequent.In airport surface movement area, there is a certain distance between ground plane and motor vehicle and control tower, and due to machine
The sight of field scene staff is blocked and under the low visibility bad weather condition such as dense fog, night vision so that aircraft is rising
Fly, landing and sliding when the probability of operation conflict occur increase severely, seriously reduce the operational efficiency and level of security on airport.Radar is made
For the main means in modern wireless exploration technology, indispensable role is equally taken in ground service monitoring system.Airport
Face surveillance radar is the important component of air traffic control system, which can grasp airdrome scene effectively in real time
Traffic circulation, safety management, Effec-tive Function to airport are played the role of vital.
In addition, as the technologies such as the development and application of digital technology, DSP, FPGA are used widely, traditional simulation letter
Number processing gradually switchs to efficiently digitlization and software implementation signal processing, to meet to the real-time of data processing and high speed
It is required that.
To make airport surface traffic control personnel grasp the terrestrial information on airport in time, scene surveillance radar need higher real-time and
High measurement accuracy just can guarantee that the safe operation of airdrome scene, the existing High Speed Signal Processor System for scene surveillance radar
Can not it is quick under the conditions of atrocious weather, reliable, accurately detect visibility at the airport, can not ensure the operational efficiency on airport
And level of security.
The content of the invention
The present invention is in order to overcome the above-mentioned deficiencies of the prior art, there is provided a kind of high speed signal for scene surveillance radar
Processing system, the present invention use the system architecture of double casing fever redundancy, can continuously start shooting for a long time, easy between disparate modules
Seamless switching, can quickly, it is reliable, accurately detect visibility at the airport, improve Airport Operation efficiency.
A kind of High Speed Signal Processor System for scene surveillance radar includes A subordinate machine systems and B subordinate machine systems, the A
Subordinate machine system and B subordinate machine systems are mutually redundant backup, two-way communication link between the A subordinate machine systems and B subordinate machine systems, and A divides
Machine system and B the subordinate machine systems two-way communication link between duplexer switch, two-way communication between the duplexer switch and antenna
Connection.
Preferably, the A subordinate machine systems include A roads transmitting subsystem, A roads HF receiving subsystem, A roads igh-speed wire-rod production line system
System, A circuit-switched datas processing system and A roads terminal display system, two-way communication between the A roads transmitting subsystem and duplexer switch
Connection, the signal output part of A roads transmitting subsystem are connected with the signal input part of A roads HF receiving subsystem, and the A roads, which receive, to be divided
The signal output part of system is connected with the signal input part of A roads High Speed Signal Processor System, A roads HF receiving subsystem and B extension sets
Two-way communication link between system, two-way communication link between A roads High Speed Signal Processor System and B subordinate machine systems, A roads are high
The signal output part of fast the signal processing system signal input part with A circuit-switched data processing systems, A roads terminal display systems respectively
Signal input part is connected.
Preferably, the B subordinate machine systems include B roads transmitting subsystem, B roads HF receiving subsystem, B roads igh-speed wire-rod production line system
System, B circuit-switched datas processing system and B roads terminal display system, two-way communication between the B roads transmitting subsystem and duplexer switch
Connection, the signal output part of B roads transmitting subsystem are connected with the signal input part of B roads HF receiving subsystem, and the B roads, which receive, to be divided
The signal output part of system is connected with the signal input part of B roads High Speed Signal Processor System, and B roads HF receiving subsystem connects with A roads
Two-way communication link between contracture system, realizes the automatic switchover between A subordinate machine systems and B subordinate machine systems, and the B roads are believed at a high speed
Number two-way communication link between processing system and A roads High Speed Signal Processor System, realizes the redundancy intercommunication of I, Q data, B roads are at a high speed
The signal output part of the signal processing system signal input part with B circuit-switched data processing systems, the letter of B roads terminal display system respectively
Number input terminal is connected.
Preferably, A roads High Speed Signal Processor System includes A railway digitals receiver, A roads PCI-E capture cards and A roads
Signal processing module, the signal output part of the signal input part connection A roads HF receiving subsystem of the A railway digitals receiver, A ways
Two-way communication link between word receiver and B roads High Speed Signal Processor System, the signal output part of A railway digital receivers pass through A
Road PCI-E capture cards are connected with the signal input part of A roads signal processing module, the signal output of A roads signal processing module
The signal input part with A circuit-switched data processing systems, the signal input part of A roads terminal display system are connected respectively at end
Preferably, B roads High Speed Signal Processor System includes B railway digitals receiver, B roads PCI-E capture cards and B roads
Signal processing module, the signal output part of the signal input part connection B roads HF receiving subsystem of the B railway digitals receiver, B ways
Two-way communication link between word receiver and A railway digital receivers, realizes the redundancy intercommunication of I, Q data, B railway digital receivers
Signal output part is connected by B roads PCI-E capture cards with the signal input part of B roads signal processing module, B roads signal processing
The signal output part of the module signal input part with B circuit-switched data processing systems, the signal input part of B roads terminal display system respectively
It is connected.
Preferably, A railway digitals receiver and B the railway digitals receiver includes receiving unit, the receiving unit
Signal input part is connected with the signal output part of A roads HF receiving subsystem or the signal output part of B roads HF receiving subsystem, reception group
Signal output part of the signal input part of part respectively with waveform generation module, Digital Up Convert module is connected, receiving unit with
Two-way communication link between time-sequence control module, the signal output part of the waveform generation module and the letter of Digital Up Convert module
Number input terminal is connected, and two-way communication link between waveform generation module and time-sequence control module, the time-sequence control module, connect
The signal output part for receiving component is connected with the signal input part of Digital Down Converter Module, the letter of the Digital Down Converter Module
Number output terminal is connected by if sampling module with the signal input part of digital gating module, the A railway digitals receiver and B
The redundancy intercommunication of I, Q data, the signal of the digital gating module are realized between railway digital receiver by digital gating module
Signal input part of the output terminal respectively with video conversion module, optical fiber transmission module is connected, the letter of the optical fiber transmission module
Number output terminal is connected with the signal input part of A roads PCI-E capture cards or the signal input part of B roads PCI-E capture cards.
Further, the A roads PCI-E capture cards, B roads PCI-E capture cards are both provided with multiple acquisition channels, A roads
PCI-E capture cards, B roads PCI-E capture cards difference real-time reception A railway digitals receiver, B railway digitals receiver transmit original
Echo I, Q signal, original echo I, the real time data amount of Q signal are the byte of 40MHz × 2 kind signal per second × 4+each data packet
Prefix information=350M bytes, wherein, 40MHz represents original echo I, the sample frequency of Q signal；2 kinds of signals represent I and Q two
Kind signal；4 sampling resolutions of byte representation 32, every 8 form 1 byte, totally 4 bytes；Each data packet prefix packet
Include azimuth information, beam information, the temporal information of current PRF.
Further, A roads signal processing module, A circuit-switched data processing system integrated operations are in same host computer, B
Road signal processing module, B circuit-switched data processing system integrated operations are in another host computer.
Further, A roads signal processing module, B roads signal processing module are designed using parallel multithread.
Present invention also offers a kind of signal processing method of the High Speed Signal Processor System for scene surveillance radar, tool
Body comprises the following steps：
When High Speed Signal Processor System is using A subordinate machine systems as service aisle, and B subordinate machine systems are redundant channel, its work
Process is as follows：
The A roads transmitting subsystem receives the radar echo signal from antenna, and by the radar echo signal successively
Sent by A roads HF receiving subsystem, A railway digital receivers to A roads PCI-E capture cards；
Start A road PCI-E capture cards and A roads signal processing module, and respectively to A roads PCI-E capture cards and A roads signal at
Reason module is initialized；
A roads signal processing module opens up buffer area in memory, waits orthogonal I, Q digital signal of A roads PCI-E capture cards
Write-in and read access；
Orthogonal I, Q digital signal that destination channel in the signal processing module of A roads sends A roads PCI-E capture cards is successively
Carry out pulse squeeze operation, adaptive-filtering operation and constant false alarm processing operation and obtain thresholding target information；
Real aperture imaging passage in the signal processing module of A roads is to orthogonal I, Q number after destination channel pulse squeeze operation
Word signal carries out video integration operation successively, secondary lobe suppresses operation, geometric corrections operate to obtain real aperture imaging figure；
The Weather Channel of A roads signal processing module is to 1 channel of adaptive-filtering operation output or the echo-signal of 3 channels
Video integration processing, distance amplitude correction processing, the operation of weather information extraction process are carried out successively, obtain 6 kinds of meteorological intensity arrows
Information is measured, so as to produce 6 grades of meteorological profiles；
The real aperture imaging figure and excessively thresholding target information are exported to A roads terminal display system by network and examined
Measurement information is shown, the thresholding target information of crossing is sent into A circuit-switched data processing systems；
Discharge the buffer area opened up；
When High Speed Signal Processor System is using B subordinate machine systems as service aisle, and A subordinate machine systems are redundant channel, its work
Process is as follows：
The B roads transmitting subsystem receives the radar echo signal from antenna, and by the radar echo signal successively
Sent by B roads HF receiving subsystem, B railway digital receivers to B roads PCI-E capture cards；
Start B road PCI-E capture cards and B roads signal processing module, and respectively to B roads PCI-E capture cards and B roads signal at
Reason module is initialized；
B roads signal processing module opens up buffer area in memory, waits orthogonal I, Q digital signal of B roads PCI-E capture cards
Write-in and read access；
Orthogonal I, Q digital signal that destination channel in the signal processing module of B roads sends B roads PCI-E capture cards is successively
Carry out pulse squeeze operation, adaptive-filtering operation and constant false alarm processing operation and obtain thresholding target information；
Real aperture imaging passage in the signal processing module of B roads is to orthogonal I, Q number after destination channel pulse squeeze operation
Word signal carries out video integration operation successively, secondary lobe suppresses operation, geometric corrections operate to obtain real aperture imaging figure；
The Weather Channel of B roads signal processing module is to 1 channel of adaptive-filtering operation output or the echo-signal of 3 channels
Video integration processing, distance amplitude correction processing, the operation of weather information extraction process are carried out successively, obtain 6 kinds of meteorological intensity arrows
Information is measured, so as to produce 6 grades of meteorological profiles；
The real aperture imaging figure and excessively thresholding target information are exported to B roads terminal display system by network and examined
Measurement information is shown, the thresholding target information of crossing is sent into B circuit-switched data processing systems；
Discharge the buffer area opened up.
The beneficial effects of the present invention are：
1), the present invention includes completely identical in structure A subordinate machine systems and B subordinate machine systems, the A subordinate machine systems and B extension sets
System is mutually redundant backup, two-way communication link between the A subordinate machine systems and B subordinate machine systems, A subordinate machine systems and B extension sets system
System between duplexer switch two-way communication link, two-way communication link between the duplexer switch and antenna, when radar wherein
When some equipment breaks down in a set of, system will reconfigure function automatically, will not reduce system performance, enhance system
Reliability.This High Speed Signal Processor System has higher distance and bearing resolution ratio, using the teaching of the invention it is possible to provide the data transfer rate more than 1Hz,
At the same time using the system architecture of double casing fever redundancy, can continuously start shooting for a long time, easy to the seamless switching between disparate modules, energy
It is enough quick, reliable, accurately detect visibility at the airport, ensure that the operational efficiency and safety on the airport under any weather condition
Level, improves Airport Operation efficiency.
2), the handling result of each processing procedure of the signal processing method of this High Speed Signal Processor System, can
Terminal display system interface is sent in the form of vision signal, as long as by safeguarding that display achieves that number it has been observed that pole
The earth, which facilitates, checks that radar receives or whether processing procedure is abnormal, provides more convenient and intuitive detection means, this hair to the user
Daylight reason signal speed is fast, full-featured.
3), the PCI-E capture cards are used to receive I, Q two ways of digital signals from digital receiver, two railway digital of I, Q
After signal is by certain data format packing, photosignal is converted into, greatly improves the speed to memory reading and writing operation,
Ensure that the data flow of digital receiver output can be sent into host computer memory through optical fiber transmission module accurately and in time, hand over
Subsequent treatment is carried out to signal processing module.
4), signal processing module by using parallel multithread design method, dynamically distributes thread in the host computer,
Management resource that can be adaptive, it is ensured that meet the high rate bioreactor requirement of data, greatly strengthen the versatility of system.
Brief description of the drawings
Fig. 1 is the structural principle block diagram of the High Speed Signal Processor System for scene surveillance radar of the present invention；
Fig. 2 is the present invention for the A railway digitals receiver of scene surveillance radar and the structural principle of B railway digital receivers
Block diagram.
10-duplexer switch, 21-A roads transmitting 22-B of subsystem roads transmitting subsystem
23-A roads, 24-B of HF receiving subsystem roads HF receiving subsystem
25-A circuit-switched data processing system 26-B circuit-switched data processing systems
27-A roads, 28-B of terminal display system roads terminal display system
30-A roads High Speed Signal Processor System 31-A railway digital receivers
32-A roads PCI-E 33-A of capture card roads signal processing module
40-B roads High Speed Signal Processor System 41-B railway digital receivers
42-B roads PCI-E 43-B of capture card roads signal processing module
311-receiving unit, 312-Digital Down Converter Module
313-time-sequence control module, 314-waveform generation module
315-Digital Up Convert module 316-if sampling module
317-digital gating, 318-video conversion module of module
319-optical fiber transmission module
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
As shown in Figure 1, a kind of High Speed Signal Processor System for scene surveillance radar includes completely identical in structure A points
Machine system and B subordinate machine systems, the A subordinate machine systems and B subordinate machine systems are mutually redundant backup, A subordinate machine systems and B the extension sets system
Two-way communication link between system, A subordinate machine systems and B the subordinate machine systems two-way communication link between duplexer switch 10, it is described double
Two-way communication link between work switch 10 and antenna.
When A subordinate machine systems are in running order, B subordinate machine systems will be placed in redundancy backup state；At B subordinate machine systems
When working status, A subordinate machine systems will be placed in redundancy backup state.When some equipment fault during radar is wherein a set of, it is
System will reconfigure function automatically, will not reduce system performance, enhance the reliability of system.
The A subordinate machine systems include A roads transmitting subsystem 21, A roads HF receiving subsystem 23, A roads High Speed Signal Processor System
30th, A circuit-switched datas processing system 25 and A roads terminal display system 27, between the A roads transmitting subsystem 21 and duplexer switch 10
Two-way communication link, the signal output part of A roads transmitting subsystem 21 are connected with the signal input part of A roads HF receiving subsystem 23,
The signal output part of A roads HF receiving subsystem 23 is connected with the signal input part of A roads High Speed Signal Processor System 30, A roads
Two-way communication link between HF receiving subsystem 23 and B subordinate machine systems, A roads High Speed Signal Processor System 30 and B subordinate machine systems
Between two-way communication link, the signal output part of A roads High Speed Signal Processor System 30 letter with A circuit-switched datas processing system 25 respectively
Number input terminal, the signal input part of A roads terminal display system 27 are connected；A roads High Speed Signal Processor System 30 includes A roads
Digital receiver 31, A roads PCI-E capture cards 32 and A roads signal processing module 33, the signal of the A railway digitals receiver 31
The signal output part of input terminal connection A roads HF receiving subsystem 23, A railway digitals receiver 31 and B roads High Speed Signal Processor System 40
Between two-way communication link, the signal output part of A railway digitals receiver 31 passes through A roads PCI-E capture cards 32 and A roads signal processing
The signal input part of module 33 is connected, the signal output part of A roads signal processing module 33 respectively with A circuit-switched data processing systems
25 signal input part, the signal input part of A roads terminal display system 27 are connected.
The B subordinate machine systems include B roads transmitting subsystem 22, B roads HF receiving subsystem 24, B roads High Speed Signal Processor System
40th, B circuit-switched datas processing system 26 and B roads terminal display system 28, between the B roads transmitting subsystem 22 and duplexer switch 10
Two-way communication link, the signal output part of B roads transmitting subsystem 22 are connected with the signal input part of B roads HF receiving subsystem 24,
The signal output part of B roads HF receiving subsystem 24 is connected with the signal input part of B roads High Speed Signal Processor System 40, B roads
Two-way communication link between HF receiving subsystem 24 and A roads HF receiving subsystem 23, is realized between A subordinate machine systems and B subordinate machine systems
Automatically switch, two-way communication link between B roads High Speed Signal Processor System 40 and A roads High Speed Signal Processor System 30 is real
The redundancy intercommunication of existing I, Q data, the signal output part of B roads High Speed Signal Processor System 40 respectively with B circuit-switched datas processing system 26
Signal input part, the signal input part of B roads terminal display system 28 is connected；B roads High Speed Signal Processor System 40 wraps
B railway digitals receiver 41, B roads PCI-E capture cards 42 and B roads signal processing module 43 are included, the B railway digitals receiver 41
The signal output part of signal input part connection B roads HF receiving subsystem 24, B railway digitals receiver 41 and A railway digitals receiver 31 it
Between two-way communication link, realize the redundancy intercommunication of I, Q data, the signal output part of B railway digitals receiver 41 passes through B roads PCI-E
Capture card 42 is connected with the signal input part of B roads signal processing module 43, the signal output part of B roads signal processing module 43
The signal input part with B circuit-switched datas processing system 26, the signal input part of B roads terminal display system 28 are connected respectively.
The A railway digitals receiver 31, B railway digitals receiver 41 are provided with DUC and DDC function.
As shown in Fig. 2, the A railway digitals receiver 31 and B railway digitals receiver 41 include receiving unit 311, it is described
The signal input part of receiving unit 311 and the signal output part of A roads HF receiving subsystem 23 or the signal of B roads HF receiving subsystem 24 are defeated
Outlet is connected, the signal input part of receiving unit 311 letter with waveform generation module 314, Digital Up Convert module 315 respectively
Number output terminal is connected, two-way communication link between receiving unit 311 and time-sequence control module 313, the waveform generation module
314 signal output part is connected with the signal input part of Digital Up Convert module 315, waveform generation module 314 and sequential control
Two-way communication link between molding block 313, the time-sequence control module 313, receiving unit 311 signal output part with numeral
The signal input part of down conversion module 312 is connected, and the signal output part of the Digital Down Converter Module 312 passes through if sampling
Module 316 is connected with the signal input part of digital gating module 317, the A railway digitals receiver 31 and B railway digital receivers
The redundancy intercommunication of I, Q data, the signal output of the digital gating module 317 are realized between 41 by digital gating module 317
The signal input part respectively with video conversion module 318, optical fiber transmission module 319 is held to be connected, the optical fiber transmission module 319
Signal output part be connected with the signal input part of A roads PCI-E capture cards 32 or the signal input part of B roads PCI-E capture cards 42
Connect.
The reference clock that the time-sequence control module 313 is provided by receiving unit 311, instructs according to current operation mode
Produce the various transmitting-receivings control work schedule needed for radar；The waveform generation module 314 is used to generate radar detection target
Transmitted waveform；Video conversion module 318 mainly includes modulus, takes the logarithm, D/A output original videos, shows and uses for video；Light
Fine transport module 319 is used for the real-time Data Transmission between digital receiver and host computer；A railway digitals receiver 31, B railway digitals
Two-way communication is mutually redundant input by A, B road of digital gating module 317 and carries out data selection between receiver 41, it is ensured that is
The output signal of two passages is all without interruption when system is out of order.
The digital quadrature I, Q signal, first by I, Q signal data buffer storage, carry out format conversion and form data packet, according to
Pulse repetition period carries out Pingpang Memory, this cycle caching reads the data in upper cycle while write-in and send optical module to transmit；Root
According to optical fiber transport protocol, data packet divides prefix and data two parts, and the echo data of each complete repetition period has as one
The content such as data packet, azimuth information of the prefix information comprising current PRF, beam information, temporal information is imitated, these information will be made
The important parameter shown for signal processing, data processing, real aperture imaging processing and video.
A roads signal processing module 33,25 integrated operation of A circuit-switched datas processing system are in same host computer, B roads signal
Processing module 43,26 integrated operation of B circuit-switched datas processing system are in another host computer.
Wherein, PCI-E capture cards are used to receive I, Q two ways of digital signals from digital receiver, two railway digital of I, Q letter
After number by certain data format packing, photosignal is converted into, greatly improves the speed to memory reading and writing operation, is protected
Having demonstrate,proved the data flow of digital receiver output can be sent into host computer memory through optical fiber transmission module accurately and in time, give
Signal processing module carries out subsequent treatment.
The A roads PCI-E capture cards 32, B roads PCI-E capture cards 42 are both provided with multiple acquisition channels, and A roads PCI-E is adopted
The original that truck 32, B roads PCI-E capture cards 42 distinguish real-time reception A railway digitals receiver 31, the transmission of B railway digitals receiver 41 comes
Beginning echo I, Q signal, original echo I, the real time data amount of Q signal are the byte of 40MHz × 2 kind signal per second × 4+each data
Bag prefix information=350M bytes, wherein, 40MHz represents original echo I, the sample frequency of Q signal；2 kinds of signals represent I and Q
Two kinds of signals；4 sampling resolutions of byte representation 32, every 8 form 1 byte, totally 4 bytes；Each data packet prefix information
Azimuth information, beam information, temporal information including current PRF.
Specifically, memory opens up the storage that buffer area is used for PCI-E buses write-in data in host computer, pass through circulation
Mode reads the radar data cached in memory and is pre-processed in real time, extract included in radar data target range,
Azimuth and radar system work state information.
Present invention also offers a kind of signal processing method of the High Speed Signal Processor System for scene surveillance radar, bag
Include following steps：
When High Speed Signal Processor System is using A subordinate machine systems as service aisle, and B subordinate machine systems are redundant channel, its work
Process is as follows：
A roads transmitting subsystem 21 receives the radar echo signal from antenna, and by the radar echo signal according to
It is secondary to be sent by A roads HF receiving subsystem 23, A railway digitals receiver 31 to A roads PCI-E capture cards 32；
The A railway digitals receiver 31 is sent radar echo signal to A roads PCI-E capture cards 32 by optical fiber；
Following steps are the process that A roads signal processing module 33 carries out radar echo signal high speed processing in host computer：
Start A roads PCI-E capture cards 32 and A roads signal processing module 33, and respectively to A roads PCI-E capture cards 32 and A roads
Signal processing module 33 is initialized；
A roads signal processing module 33 opens up buffer area in memory, waits orthogonal I, Q numeral of A roads PCI-E capture cards 32
The write-in of signal and read access；
Orthogonal I, Q digital signal that destination channel in A roads signal processing module 33 sends A roads PCI-E capture cards 31
Pulse squeeze operation, adaptive-filtering operation and constant false alarm processing operation are carried out successively obtained thresholding target information；Wherein, arteries and veins
It is to carry out pulse compression to linear FM signal echo to rush squeeze operation, and broad pulse is compressed into burst pulse, output signal is existed
Occur peak value at the range gate of target, while improve signal-to-noise ratio.Adaptive-filtering operation is that Radar Design is had multigroup wave filter,
Radar Monitoring Performance can be improved according to the adaptively selected wave filter group of noise intensity；Due to the frequency spectrum of Moving Target Return covering
It is most wide, whole Doppler frequency band can be covered, therefore constant false alarm processing is respectively adopted is divided in the channel of all wave filters
Road independent detection；
Real aperture imaging passage in A roads signal processing module 33 is to orthogonal I, Q after destination channel pulse squeeze operation
Digital signal carries out video integration operation successively, secondary lobe suppresses operation, geometric corrections operate to obtain real aperture imaging figure；Wherein,
Video integration operation is to be overlapped the video echo signal of continuous N number of repetition period same range cell, is effectively improved and regards
Frequency signal-to-noise ratio is to improve detectivity.It is due to that pulse pressure secondary lobe can produce real aperture imaging figure background dirt that secondary lobe, which suppresses operation,
Dye, seriously limits the resolution ratio of radar image；The method for employing secondary lobe suppression, minor level will be advised by the biquadratic of distance
Rule declines with distance, is just down to after certain distance below noise level, secondary lobe is substantially inhibited.Geometric corrections operate
Because in the data that radar receives, distance dimension record by oblique distance, however requirement be ground distance, between both
Difference just be referred to as oblique distance distortion.In order to eliminate target oblique distance distortion caused geometric distortion in grating is shown, in distance
Target oblique distance is done in display to the projection process of rectangular coordinate plane；
The Weather Channel of A roads signal processing module 33 believes 1 channel of adaptive-filtering operation output or the echo of 3 channels
Video integration processing, distance amplitude correction processing, the operation of weather information extraction process are carried out number successively, obtain 6 kinds of meteorological intensity
Vector Message, so as to produce 6 grades of meteorological profiles；Video integration processing is substantially carried out distance and bearing correlation average treatment and forms gas
As figure, eliminate apart from upper incoherent echo；Distance amplitude correction processing is mainly due to transmitting signal strength with distance
Increase and decay, therefore the echo strength that the meteorology of same intensity is presented in different distance is different.It is this in order to reduce
The influence of intensity is caused by energy attenuation, to the meteorological amplitude equalizing value in different distance, plus a correction value；Weather information
Extraction operation is mainly that meteorological outline data is handled, and forms the Profile plot of 6 grades of raininess degree；
6 kinds of meteorological strength vector information refer to that the grade of meteorological intensity is divided into 6 kinds.
The real aperture imaging figure and excessively thresholding target information are exported to A roads terminal display system 27 by network and carried out
Detection information is shown, the thresholding target information of crossing is sent into A circuit-switched datas processing system 25；
Discharge the buffer area opened up；
When High Speed Signal Processor System is using B subordinate machine systems as service aisle, and A subordinate machine systems are redundant channel, its work
Process is as follows：
B roads transmitting subsystem 22 receives the radar echo signal from antenna, and by the radar echo signal according to
It is secondary to be sent by B roads HF receiving subsystem 24, B railway digitals receiver 41 to B roads PCI-E capture cards 42；
The B railway digitals receiver 41 is sent radar echo signal to B roads signal processing module 43 by optical fiber；
Following steps are the process that B roads signal processing module 43 carries out radar echo signal high speed processing in host computer：
Start B roads PCI-E capture cards 42 and B roads signal processing module 43, and respectively to B roads PCI-E capture cards 42 and B roads
Signal processing module 43 is initialized；
B roads signal processing module 43 opens up buffer area in memory, waits orthogonal I, Q numeral of B roads PCI-E capture cards 42
The write-in of signal and read access；
Orthogonal I, Q digital signal that destination channel in B roads signal processing module 43 sends B roads PCI-E capture cards 41
Pulse squeeze operation, adaptive-filtering operation and constant false alarm processing operation are carried out successively obtained thresholding target information；
Real aperture imaging passage in B roads signal processing module 43 is to orthogonal I, Q after destination channel pulse squeeze operation
Digital signal carries out video integration operation successively, secondary lobe suppresses operation, geometric corrections operate to obtain real aperture imaging figure；
The Weather Channel of B roads signal processing module 43 believes 1 channel of adaptive-filtering operation output or the echo of 3 channels
Video integration processing, distance amplitude correction processing, the operation of weather information extraction process are carried out number successively, obtain 6 kinds of meteorological intensity
Vector Message, so as to produce 6 grades of meteorological profiles；
The real aperture imaging figure and excessively thresholding target information are exported to B roads terminal display system 28 by network and carried out
Detection information is shown, the thresholding target information of crossing is sent into B circuit-switched datas processing system 26；
Discharge the buffer area opened up.
Signal processing module dynamically distributes thread by using parallel multithread design method in the host computer, can
With adaptive management resource, it is ensured that meet the high rate bioreactor requirement of data, greatly strengthen the versatility of system.
Wherein, in view of conventional radar need by professional test instrument and meter test and analyze the source of trouble, the system for ease of
Test and maintenance, the handling result of each processing procedure of signal processing module, can be sent in the form of vision signal
Terminal display interface, as long as by safeguarding that display achieves that number it has been observed that so as to check that radar receives or processing procedure is
No exception, provides more convenient and intuitive detection means to the user.
Since airport surface detection radar will not only monitor the target of movement, it is also necessary to determine position and the phase of static target
Close information.Therefore, the signal processing of the scene surveillance radar mainly includes：Real aperture imaging processing, fixed target detection
Processing, moving object detection processing and weather echo detection process.Wherein real aperture imaging processing can obtain airport scene and
The two-dimensional radar image of target, is conducive to the identification to target；Fixed object detection process realizes that atural object mesh is fixed on airport periphery
Target monitors；The target detection of runway, taxiway and its close region is realized in moving object detection processing；At weather echo detection
Reason can obtain the metastable rainfall intensity Vector Message in airport periphery.
Claims (10)
1. the High Speed Signal Processor System for scene surveillance radar, it is characterised in that：Including A subordinate machine systems and B subordinate machine systems,
The A subordinate machine systems and B subordinate machine systems are mutually redundant backup, two-way communication company between the A subordinate machine systems and B subordinate machine systems
Connect, A subordinate machine systems and B the subordinate machine systems two-way communication link between duplexer switch (10), the duplexer switch (10) and day
Two-way communication link between line.
2. it is used for the High Speed Signal Processor System of scene surveillance radar as claimed in claim 1, it is characterised in that：The A points
Machine system includes A roads transmitting subsystem (21), A roads HF receiving subsystem (23), A roads High Speed Signal Processor System (30), A circuit-switched datas
Processing system (25) and A roads terminal display system (27), it is double between the A roads transmitting subsystem (21) and duplexer switch (10)
To communication connection, the signal output part of A roads transmitting subsystem (21) is connected with the signal input part of A roads HF receiving subsystem (23)
Connect, the signal output part of A roads HF receiving subsystem (23) is connected with the signal input part of A roads High Speed Signal Processor System (30)
Connect, two-way communication link between A roads HF receiving subsystem (23) and B subordinate machine systems, A roads High Speed Signal Processor System (30) with
Two-way communication link between B subordinate machine systems, the signal output part of A roads High Speed Signal Processor System (30) respectively with A circuit-switched datas
Signal input part, the signal input part of A roads terminal display system (27) of reason system (25) are connected.
3. it is used for the High Speed Signal Processor System of scene surveillance radar as claimed in claim 2, it is characterised in that：The B points
Machine system includes B roads transmitting subsystem (22), B roads HF receiving subsystem (24), B roads High Speed Signal Processor System (40), B circuit-switched datas
Processing system (26) and B roads terminal display system (28), it is double between the B roads transmitting subsystem (22) and duplexer switch (10)
To communication connection, the signal output part of B roads transmitting subsystem (22) is connected with the signal input part of B roads HF receiving subsystem (24)
Connect, the signal output part of B roads HF receiving subsystem (24) is connected with the signal input part of B roads High Speed Signal Processor System (40)
Connect, two-way communication link between B roads HF receiving subsystem (24) and A roads HF receiving subsystem (23), realizes A subordinate machine systems and B extension sets
Automatic switchover between system, it is double between B roads High Speed Signal Processor System (40) and A roads High Speed Signal Processor System (30)
To communication connection, realize the redundancy intercommunication of I, Q data, the signal output part of B roads High Speed Signal Processor System (40) respectively with B roads
Signal input part, the signal input part of B roads terminal display system (28) of data handling system (26) are connected.
4. it is used for the High Speed Signal Processor System of scene surveillance radar as claimed in claim 3, it is characterised in that：The A roads
High Speed Signal Processor System (30) includes A railway digitals receiver (31), A roads PCI-E capture cards (32) and A roads signal processing mould
Block (33), the signal output part of the signal input part connection A road HF receiving subsystems (23) of the A railway digitals receiver (31), A roads
Two-way communication link between digital receiver (31) and B roads High Speed Signal Processor System (40), the letter of A railway digitals receiver (31)
Number output terminal is connected by A roads PCI-E capture cards (32) with the signal input part of A roads signal processing module (33), the A roads letter
The signal output part of number processing module (33) signal input part with A circuit-switched datas processing system (25), A roads terminal display system respectively
The signal input part of system (27) is connected.
5. it is used for the High Speed Signal Processor System of scene surveillance radar as claimed in claim 4, it is characterised in that：The B roads
High Speed Signal Processor System (40) includes B railway digitals receiver (41), B roads PCI-E capture cards (42) and B roads signal processing mould
Block (43), the signal output part of the signal input part connection B road HF receiving subsystems (24) of the B railway digitals receiver (41), B roads
Two-way communication link between digital receiver (41) and A railway digitals receiver (31), realizes the redundancy intercommunication of I, Q data, B ways
The signal output part of word receiver (41) is inputted by the signal of B roads PCI-E capture cards (42) and B roads signal processing module (43)
End is connected, the signal output part signal input with B circuit-switched datas processing system (26) respectively of B roads signal processing module (43)
End, the signal input part of B roads terminal display system (28) are connected.
6. it is used for the High Speed Signal Processor System of scene surveillance radar as claimed in claim 5, it is characterised in that：The A roads
Digital receiver (31) and B railway digitals receiver (41) include receiving unit (311), the signal of the receiving unit (311)
Input terminal is connected with the signal output part of A roads HF receiving subsystem (23) or the signal output part of B roads HF receiving subsystem (24), connects
Receive component (311) signal input part respectively with waveform generation module (314), the signal output of Digital Up Convert module (315)
End is connected, two-way communication link between receiving unit (311) and time-sequence control module (313), the waveform generation module
(314) signal output part is connected with the signal input part of Digital Up Convert module (315), waveform generation module (314) with
Two-way communication link between time-sequence control module (313), the time-sequence control module (313), the signal of receiving unit (311) are defeated
Signal input part of the outlet with Digital Down Converter Module (312) is connected, and the signal of the Digital Down Converter Module (312) is defeated
Outlet is connected by if sampling module (316) with the signal input part of digital gating module (317), and the A railway digitals connect
The redundancy intercommunication of I, Q data, institute are realized between receipts machine (31) and B railway digitals receiver (41) by digital gating module (317)
State the signal output part of digital gating module (317) respectively with video conversion module (318), the letter of optical fiber transmission module (319)
Number input terminal is connected, and the signal of the signal output part and A roads PCI-E capture cards (32) of the optical fiber transmission module (319) is defeated
The signal input part for entering end or B roads PCI-E capture cards (42) is connected.
7. it is used for the High Speed Signal Processor System of scene surveillance radar as claimed in claim 6, it is characterised in that：The A roads
PCI-E capture cards (32), B roads PCI-E capture cards (42) are both provided with multiple acquisition channels, A roads PCI-E capture cards (32), B roads
Real-time reception A railway digitals receiver (31), B railway digitals receiver (41) transmit original time come to PCI-E capture cards (42) respectively
Ripple I, Q signal, original echo I, the real time data amount of Q signal are the byte of 40MHz × 2 kind signal per second × 4+each data packet word
Header=350M bytes, wherein, 40MHz represents original echo I, the sample frequency of Q signal；2 kinds of signals represent I and two kinds of Q
Signal；4 sampling resolutions of byte representation 32, every 8 form 1 byte, totally 4 bytes；Each data packet prefix information includes
Azimuth information, beam information, the temporal information of current PRF.
8. it is used for the High Speed Signal Processor System of scene surveillance radar as claimed in claim 7, it is characterised in that：The A roads
Signal processing module (33), A circuit-switched datas processing system (25) integrated operation are in same host computer, B roads signal processing module
(43), B circuit-switched datas processing system (26) integrated operation is in another host computer.
9. it is used for the High Speed Signal Processor System of scene surveillance radar as claimed in claim 8, it is characterised in that：The A roads
Signal processing module (33), B roads signal processing module (43) are designed using parallel multithread.
A kind of 10. letter of High Speed Signal Processor System for scene surveillance radar as described in claim 7~9 any one
Number processing method, it is characterised in that comprise the following steps：
When High Speed Signal Processor System is using A subordinate machine systems as service aisle, and B subordinate machine systems are redundant channel, its course of work
It is as follows：
The A roads transmitting subsystem (21) receives the radar echo signal from antenna, and by the radar echo signal successively
Sent by A roads HF receiving subsystem (23), A railway digitals receiver (31) to A roads PCI-E capture cards (32)；
Start A road PCI-E capture cards (32) and A roads signal processing module (33), and respectively to A roads PCI-E capture cards (32) and A
Road signal processing module (33) is initialized；
A roads signal processing module (33) opens up buffer area in memory, waits orthogonal I, Q numeral of A road PCI-E capture cards (32)
The write-in of signal and read access；
Orthogonal I, Q digital signal that destination channel in A roads signal processing module (33) sends A roads PCI-E capture cards (32)
Pulse squeeze operation, adaptive-filtering operation and constant false alarm processing operation are carried out successively obtained thresholding target information；
Real aperture imaging passage in A roads signal processing module (33) is to orthogonal I, Q number after destination channel pulse squeeze operation
Word signal carries out video integration operation successively, secondary lobe suppresses operation, geometric corrections operate to obtain real aperture imaging figure；
The Weather Channel of A roads signal processing module (33) is to 1 channel of adaptive-filtering operation output or the echo-signal of 3 channels
Video integration processing, distance amplitude correction processing, the operation of weather information extraction process are carried out successively, obtain 6 kinds of meteorological intensity arrows
Information is measured, so as to produce 6 grades of meteorological profiles；
The real aperture imaging figure and excessively thresholding target information are exported to A roads terminal display system (27) by network and examined
Measurement information is shown, the thresholding target information of crossing is sent into A circuit-switched datas processing system (25)；
Discharge the buffer area opened up；
When High Speed Signal Processor System is using B subordinate machine systems as service aisle, and A subordinate machine systems are redundant channel, its course of work
It is as follows：
The B roads transmitting subsystem (22) receives the radar echo signal from antenna, and by the radar echo signal successively
Sent by B roads HF receiving subsystem (24), B railway digitals receiver (41) to B roads PCI-E capture cards (42)；
Start B road PCI-E capture cards (42) and B roads signal processing module (43), and respectively to B roads PCI-E capture cards (42) and B
Road signal processing module (43) is initialized；
B roads signal processing module (43) opens up buffer area in memory, waits orthogonal I, Q numeral of B road PCI-E capture cards (42)
The write-in of signal and read access；
Orthogonal I, Q digital signal that destination channel in B roads signal processing module (43) sends B roads PCI-E capture cards (42)
Pulse squeeze operation, adaptive-filtering operation and constant false alarm processing operation are carried out successively obtained thresholding target information；
Real aperture imaging passage in B roads signal processing module (43) is to orthogonal I, Q number after destination channel pulse squeeze operation
Word signal carries out video integration operation successively, secondary lobe suppresses operation, geometric corrections operate to obtain real aperture imaging figure；
The Weather Channel of B roads signal processing module (43) is to 1 channel of adaptive-filtering operation output or the echo-signal of 3 channels
Video integration processing, distance amplitude correction processing, the operation of weather information extraction process are carried out successively, obtain 6 kinds of meteorological intensity arrows
Information is measured, so as to produce 6 grades of meteorological profiles；
The real aperture imaging figure and excessively thresholding target information are exported to B roads terminal display system (28) by network and examined
Measurement information is shown, the thresholding target information of crossing is sent into B circuit-switched datas processing system (26)；
Discharge the buffer area opened up.
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