CN105527613B - A kind of data handling system and method - Google Patents
A kind of data handling system and method Download PDFInfo
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- CN105527613B CN105527613B CN201510996461.3A CN201510996461A CN105527613B CN 105527613 B CN105527613 B CN 105527613B CN 201510996461 A CN201510996461 A CN 201510996461A CN 105527613 B CN105527613 B CN 105527613B
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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
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
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- Radar, Positioning & Navigation (AREA)
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- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention discloses a kind of data handling system and method, by the data subset for being divided into corresponding independent wave beam by the first demultplexer, each data processor handles the data subset of corresponding independent wave beam, the data collection of data processor processes is first reallocated and is handled successively to a mark acquisition module, tracker module, data format conversion module and display module by second multiplexer, this system performs advanced signal processing technology for marine radar and provides a low cost solution；It is for realize that the amount of the processing capacity of its target needs is flexible, if desired more processing ability is then easy to increase more SDP；The advanced signal processing of suitable small target deteection and effective clutter recognition can be carried in real time.
Description
Technical field
The present invention relates to radar monitoring fields, and in particular to a kind of data handling system and method.
Background technology
The mechanism and enterprise that port office, border and infrastructure are protected, such as oil and natural gas industry and sea transport,
The requirement of target size and detectability shows in severe marine environment:They need marine radar to listen carefully powerful signal
Treatment technology.Commercially available marine radar system architecture is limited using computation-intensive signal processing technology, they are depended on mostly
The single or multiple threat processors of the I/Q data rate of limitation, but simple signal processing technology can only be done, such as CA, CFA.
If clutter increases, they can not detect and track mostly normal size in canoe/object or high sea situation under normal sea situation
Target.Although there is enterprise to propose that, using high-end dsp processor, high-end DSP has higher processing capacity, but also this
A little system expensives, at the same time China's relevant law policy also make the regulation strictly exported.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention one of them be designed to provide it is a kind of it is at low cost, calculate
Ability is strong and the flexible data handling system for the treatment of capacity.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of data handling system, it is characterised in that：Including the first demultplexer, the second multiplexer, described
Several data processors are provided between one demultplexer and the second multiplexer, the second multiplexer output is successively
Tie point mark acquisition module, tracker module, data format conversion module and display module..
As the improvement of above-mentioned technical proposal, the data processor includes sequentially connected data intake device unit, arteries and veins
Rush interference filter unit, doppler processing unit, clutter recognition unit, constant false alarm rate unit, binary integration unit.
As the improvement of above-mentioned technical proposal, the data format conversion module stores data with NMEA forms.
In order to overcome the above-mentioned deficiencies of the prior art, another purpose of the invention is to put forward a kind of data processing method,
It carries out optimization collocation when detecting and tracking weather activity to phased array weather radar resource.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of data processing method, specifically includes following steps：
It is characterized in that specifically comprise the following steps：
1）Time series data is divided into the data subset of corresponding independent wave beam, data intake by the first demultplexer
Module carries out data subset error detection and correction, and arranges according to corresponding pulse and marshal data and be sent to impulse disturbances
Filter unit；
2）Impulse disturbances filter unit carries out error detection to data subset, removes big as caused by lightning or other environmental factors
Measure pulse spike；
3）Data subset is moved to Doppler amplitude from impulse amplitude domain with Doppler filter or Fourier transformation
Domain；
4）It removes clutter and other incoherent signals and is sent to constant false alarm rate module；
5）Constant false alarm rate module carries out target acquisition；
6）The echo signal detected by constant false alarm rate module can be sent to binary integration unit, and be arranged by logic
Except the random behavior of false target；
7）Second multiplexer elder generation collection step 6）Middle signal is reallocated to a mark acquisition module,
8）Point mark acquisition module extraction result can be sent to tracker module, and track is determined；
9）Data conversion module change data form, storage are simultaneously shown.
As the improvement of above-mentioned technical proposal, the step 4）Remove clutter detailed process be：By using clutter map
Clutter is effectively removed, the formation of the clutter map determined by the average value persistently scanned, can be according to incoming scanning
Data are updated, and be saved for from clutter recognize real goal when as reference.
As the improvement of above-mentioned technical proposal, the step 5）Middle constant false alarm rate module meeting under strong clutter and disturbed condition
Enhance the ability to target acquisition in a manner that mixed cell is averaged CFAR detection and Ordered Statistic CFAR detection.
As the improvement of above-mentioned technical proposal, mixed cell be averaged CFAR detection method by using cell-average skill
Art estimates noise rank, and the method for Ordered Statistic CFAR detection estimates sound level by counting；The sound level
It is to be compared for the signal with object.
As the improvement of above-mentioned technical proposal, the step 7）Track is detected by using Kalman filtering method, is removed empty
False sign, to provide the working performance of radar.
As the improvement of above-mentioned technical proposal, data format conversion module stores data with NMEA forms.
The beneficial effects of the invention are as follows：A kind of data handling system and method, by being divided by the first demultplexer
The data subset of corresponding independent wave beam, each data processor handle the data subset of corresponding independent wave beam, institute
State the second multiplexer first by the data collection of data processor processes reallocate to a mark acquisition module, tracker module,
Data format conversion module and display module are handled successively, this system performs advanced signal processing technology for marine radar and provides one
A low cost solution；It is for realize that the amount of processing capacity that its target needs is flexible, if desired more processing
Ability is then easy to increase more SDP；At the first inlet signal that suitable small target deteection and effective clutter recognition can be carried in real time
Reason.
Description of the drawings
The invention will be further described in the following with reference to the drawings and specific embodiments：
Fig. 1 is the flow chart of the specific embodiment of the invention；
Fig. 2 is the system construction drawing of the specific embodiment of the invention.
Specific embodiment
The present invention is described in further details below in conjunction with the accompanying drawings：
Referring to the drawings 2, the present invention proposes a kind of data handling system, including two groups of demultplexers and several data processings
Device, the first demultplexer output terminal connect several Signal Data Processors, and data processor output terminal connects the second multichannel and answers
With device, the second multiplexer output is sequentially connected a mark acquisition module, tracker module, data format conversion module and shows
Show module, time series data is divided into the data subset of corresponding independent wave beam by the first demultplexer, at each data
Reason device handles the data subset of corresponding independent wave beam, and second multiplexer is first by data processor processes
Data collection is reallocated to be handled successively to a mark acquisition module, tracker module, data format conversion module and display module.
Data processor includes sequentially connected data intake device unit, impulse disturbances filter unit, doppler processing list
Member, clutter recognition unit, constant false alarm rate unit, binary integration unit.
Operation principle is：Air traffic control radar on coastline includes the day of a mechanical rotation in certain direction
Line, sweep speed may be up to 5 seconds one turn, which can emit and receive low wave beam and high beam signal：Low wave beam is to use
In covering earth's surface to intermediate altitude height space, high wave beam is for the space of High aititude height in covering.For on coastline
Air traffic control radar, low wave beam can detect ground target and aerial target simultaneously.Antenna can be sent out to monitoring area of interest
Series of electromagnetic pulse is penetrated, electromagnetic pulse can be reflected to antenna by the object in this monitoring area.Some objects reflect
Radar signal needs paid close attention to, then be referred to as " target ", and the radar signal that other remaining objects reflect
It is referred to as " clutter ", that is, the noise in radar system.Earth's surface target is considered as in existing area control radar system
Noise, therefore be removed in its signal processing.In general, pass through one on data-link from the radar data that antenna is collected into
A bandpass filter is pre-processed, and removes irrelevant signal or noise outside radar data, then radar data solution is transferred to
If radar data, then carry out the analog-to-digital conversion of radar data.At this point, radar data is demodulated to base band data（I/Q data）,
And to base band data（I/Q data）Carry out low-pass filtering and sampling.This data can be sent to aerial target processor into traveling
The processing of one step, for detect and track aerial target.
The I/Q data sent from transceiver can be sent to intake device first, be then transmitted to data intake device carry out error detection and
Correction, and according to corresponding pulse come arrange and marshal data processing signal first modular pulse interference filter.It should
In module, error detection can be carried out to data, remove as caused by lightning or other environmental factors a large amount of pulse spike to reduce this
Kind edge effect replaces big spike by adding interpolation in adjacent interval.
Next step data sending uses Doppler filter or Fourier transformation data to Doppler processing block
Doppler amplitude domain is moved to from impulse amplitude domain.Clutter is removed followed by mobile Target indication wave filter and other are incoherent
Signal.Clutter recognition module effectively removes clutter by using clutter map, and the formation of the clutter map is by persistently scanning
Average value determined, can be updated according to incoming scan data, and be saved to recognize true mesh from clutter
During mark as reference.Data are sent to constant false alarm rate module progress target acquisition/constant false alarm rate module data and can be sent to
CFAR detection module carries out target acquisition.The CFAR detection that can be averaged under strong clutter and disturbed condition using mixed cell and
The mode of Ordered Statistic CFAR detection enhances the ability to target acquisition.The method of unit average constant false alarm detection is by making
Estimate noise rank with cell-average technology, and the method for Ordered Statistic CFAR detection estimates noise etc. by counting
Grade.And this sound level is compared for the signal with object.The echo signal being tested can be sent to binary
Integrated package, and pass through the random behavior of logic exclusion false target.The echo signal detected by binary integrated package can be sent to
Point mark extraction module.Point mark extraction result can be sent to tracker, and track can be determined.It is detected by using Kalman filtering method
Track removes false sign, to provide the working performance of radar.The track that tracker generates can be assisted with National Marine Electronics
Reference format can be formulated（NMEA）It stores.Like this, any commercial support National Marine Electronics association formulates mark
The display and software of quasiconfiguaration can also pass through peace with other information such as map etc. together using these track datas
Full network transmission gives specific client.
Another is designed to provide a kind of data processing method to the embodiment of the present invention, mainly includes the following steps that：
1）Time series data is divided into the data subset of corresponding independent wave beam, data intake by the first demultplexer
Module carries out data subset error detection and correction, and arranges according to corresponding pulse and marshal data and be sent to impulse disturbances
Filter unit；
2）Impulse disturbances filter unit carries out error detection to data subset, removes big as caused by lightning or other environmental factors
Measure pulse spike；
3）Data subset is moved to Doppler amplitude from impulse amplitude domain with Doppler filter or Fourier transformation
Domain；
4）It removes clutter and other incoherent signals and is sent to constant false alarm rate module；Remove the detailed process of clutter
For：Clutter is effectively removed by using clutter map, the formation of the clutter map is determined by the average value persistently scanned,
When can be updated according to incoming scan data, and be saved to recognize real goal from clutter as reference；
5）Constant false alarm rate module carries out target acquisition；Constant false alarm rate module can use mixing under strong clutter and disturbed condition
Unit average constant false alarm detects with the mode of Ordered Statistic CFAR detection to enhance the ability to target acquisition；
6）The echo signal detected by constant false alarm rate module can be sent to binary integrated package, and empty by logic exclusion
The random behavior of decoy；
7）Second multiplexer elder generation collection step 6）Middle signal is reallocated to a mark acquisition module；
8）Point mark acquisition module extraction result can be sent to tracker module, and track can be determined；Point mark acquisition module leads to
It crosses and detects track using Kalman filtering method, false sign is removed, to provide the working performance of radar；
9）Data conversion module change data form, storage are simultaneously shown.
The above are the preferable implementations to invention to be illustrated, but innovation and creation are not limited to the embodiment, ripe
A variety of equivalent modifications or replacement can also be made on the premise of without prejudice to spirit of the invention by knowing those skilled in the art, these
Equivalent modification or replacement is all contained in the application claim limited range.
Claims (7)
1. a kind of radar data processing system, it is characterised in that：Including demultplexer, multiplexer, the multichannel distribution
Several data processors are provided between device and multiplexer parallel, multiplexer output is sequentially connected a mark intake mould
Block, tracker module, data format conversion module and display module, the data processor are absorbed including sequentially connected data
Device unit, impulse disturbances filter unit, doppler processing unit, clutter recognition unit, constant false alarm rate unit and binary integration
Unit, by the random behavior of logic exclusion false target, the data format conversion module stores data with NMEA forms.
2. a kind of a kind of radar data processing method based on radar data processing system described in claim 1, feature exist
In specifically comprising the following steps：
1) time series data is divided into the data subset of corresponding independent wave beam, data intake device list by the first demultplexer
Member carries out data subset error detection and correction, and arranges according to corresponding pulse and marshal data and be sent to impulse disturbances filter
Ripple unit；
2) impulse disturbances filter unit carries out error detection to data subset, removes a large amount of arteries and veins as caused by lightning or other environmental factors
Rush spike；
3) data subset is moved to Doppler amplitude domain from impulse amplitude domain with doppler processing unit or Fourier transformation；
4) clutter and other incoherent signals are removed and are sent to constant false alarm rate unit；
5) constant false alarm rate unit carries out target acquisition；
6) echo signal detected by constant false alarm rate unit can be sent to binary integration unit, and empty by logic exclusion
The random behavior of decoy；
7) the second multiplexer elder generation collection step 6) in signal reallocate to a mark acquisition module；
8) tracker module can be sent to by putting mark acquisition module extraction result, and track is determined；
9) data format conversion module change data form, storage and show.
3. a kind of radar data processing method according to claim 2, which is characterized in that clutter is removed in the step 4)
Detailed process be：Clutter is effectively removed by using clutter map, the formation of the clutter map is flat by what is persistently scanned
Average is determined, when can be updated according to incoming scan data, and be saved to recognize real goal from clutter
As reference.
A kind of 4. radar data processing method according to claim 2, which is characterized in that constant false alarm rate in the step 5)
Unit can use mixed cell be averaged the side of CFAR detection and Ordered Statistic CFAR detection under strong clutter and disturbed condition
Formula.
5. a kind of radar data processing method according to claim 3, which is characterized in that mixed cell be averaged constant false alarm inspection
The method of survey estimates noise rank by using cell-average algorithm, the method for Ordered Statistic CFAR detection by count come
Estimate sound level；The sound level is compared for the signal with object.
6. a kind of radar data processing method according to claim 3, which is characterized in that step 8) midpoint mark absorbs
Module detects track by using Kalman filtering method, removes false sign.
A kind of 7. radar data processing method according to claim 3, which is characterized in that data format in the step 9)
Conversion module stores data with NMEA forms.
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| CN205484780U (en) * | 2015-12-24 | 2016-08-17 | 珠海加中通科技有限公司 | Data processing system |
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| US5546089A (en) * | 1995-08-10 | 1996-08-13 | The United States Of America As Represented By The Secretary Of The Air Force | Optical monopulse chirp processor |
| US7741992B2 (en) * | 2006-11-02 | 2010-06-22 | Raytheon Canada Limited | Moving target detector for radar systems |
| CN104407347A (en) * | 2014-12-10 | 2015-03-11 | 珠海纳睿达科技有限公司 | Radar system |
| CN104459669A (en) * | 2014-12-10 | 2015-03-25 | 珠海纳睿达科技有限公司 | Radar reflection signal processing device and method |
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Address after: No.2 Gangle Road, Tangjiawan Town, Zhuhai City, Guangdong Province 519080 Patentee after: Guangdong Narui Radar Technology Co.,Ltd. Address before: 519080 unit n, room 607, 6th floor, main building, No.10, Keji 1st Road, Gangwan Avenue, Tangjiawan Town, Zhuhai City, Guangdong Province Patentee before: Zhuhai Naruida Technology Co.,Ltd. |
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