CN103913730A - Method for improving detectivity of phased array radar using asynchronous sliding type MTD - Google Patents

Method for improving detectivity of phased array radar using asynchronous sliding type MTD Download PDF

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Publication number
CN103913730A
CN103913730A CN201410141737.5A CN201410141737A CN103913730A CN 103913730 A CN103913730 A CN 103913730A CN 201410141737 A CN201410141737 A CN 201410141737A CN 103913730 A CN103913730 A CN 103913730A
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CN
China
Prior art keywords
mtd
radar
detectivity
array radar
cycle
Prior art date
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Pending
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CN201410141737.5A
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Chinese (zh)
Inventor
吴金国
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Sichuan Jiuzhou Electric Group Co Ltd
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Sichuan Jiuzhou Electric Group Co Ltd
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Publication date
Application filed by Sichuan Jiuzhou Electric Group Co Ltd filed Critical Sichuan Jiuzhou Electric Group Co Ltd
Priority to CN201410141737.5A priority Critical patent/CN103913730A/en
Publication of CN103913730A publication Critical patent/CN103913730A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S2013/0236—Special technical features
    • G01S2013/0245—Radar with phased array antenna

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The invention provides a method for improving the detectivity of a phased array radar using asynchronous sliding type MTD. The method includes the following steps that (1) the same PRF without separated frames is used in an emission subsystem to radiate signals externally; (2) the MTD data cycle t2 is determined according to wave beam maximum residence time; (3) the MTD processing period t1 is divided; (4) the MTD data updating cycle is set to be the same as the t1, and data updating is achieved in an FIFO mode. According to the method for improving the detectivity of the phased array radar using asynchronous sliding type MTD, compared with a traditional radar, detecting coverage can be maximized under the equal condition, and calculation can be conducted according to a radar coverage formula; compared with a traditional radar signal processing system, the coverage can be improved by multiple times (please see the specification for the expression) with all things being equal.

Description

Utilize asynchronous slidingtype MTD to promote the method for the detectivity of phased-array radar
Technical field
The present invention relates to phased-array radar field, especially relate to a kind of method of utilizing asynchronous slidingtype MTD to promote the detectivity of phased-array radar.
Background technology
At present, typical Radar Signal Processing System has all adopted the technological means that detects (MTD) based on moving-target, and compared with traditional MTI, MTD mainly relies on the potential ability of signal processing, has done improvement aspect following three:
1, improve the frequency characteristic of wave filter, make it closer to best (coupling) linear filtering, to improve improvement factor;
2, the high detection general objective that the slower-velocity target in clutter even tangentially flies doughtily more;
3, can not only suppress average Doppler shift and be generally zero fixed clutter, and can also suppress motion (slow motion) clutter causing as meteorology, flock of birds etc.
For guaranteeing larger target detection probability and higher angle measurement accuracy, in conjunction with wave beam residence time, the existing radar system based on MTD is in the process of Project Realization, first according to surveying power (PRF, pulse repetition rate) wave beam residence time is divided into fixing some processed frames, then according to the length of processed frame time determine MTD process count, this solution has determined that actual MTD processes and has counted far fewer than accessible maximum number of points, cause the detection power of whole radar limited, also have the potentiality of further excavating.
Summary of the invention
The object of the invention is to: a kind of method of utilizing asynchronous slidingtype MTD to promote the detectivity of phased-array radar is provided, solve and guaranteeing under the prerequisite of target detection probability and angle measurement accuracy, the existing MTD actual treatment based on moving target detection radar is counted and can be processed the problem of counting much smaller than maximum, the present invention can not change under the basis of radar system front end hardware, further excavates, improves radar detection ability.
Goal of the invention of the present invention is achieved through the following technical solutions:
Utilize asynchronous slidingtype MTD to promote a method for the detectivity of phased-array radar, it is characterized in that, the method comprises the following steps:
(1) transmitting subsystem adopts the external radiation signal of identical PRF regardless of frame;
(2) determine MTD data cycle t2 according to the maximum residence time of wave beam;
(3) divide MTD treatment cycle t1;
(4) the MTD Data Update cycle is set to unanimously with t1, adopts the mode of FIFO to complete Data Update.
Preferably, treatment cycle t1 is according to the design objective of concrete radar system, determines in conjunction with the processing power of concrete radar signal processor.
Preferably, must select the processing hardware platform of certain treatment effeciency to guarantee that t1 is much smaller than t2.
Compared with prior art, the present invention can keep longer data cycle t2 in realizing the shorter treatment cycle t1 of employing, be transformed in radar system, the former is equivalent to the target observation number of times that has both kept more, the latter has guaranteed that the accumulation of maximized coherent counts, more target observation number of times and then mean higher target detection probability and angle measurement accuracy, maximized coherent accumulation is counted and is meaned under equal conditions maximized detection power, can calculate according to radar power formula, the present invention is with respect to traditional Radar Signal Processing System, under equal conditions can promote power doubly.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
Along with the development of electronic devices and components, the capacity of all kinds of process chip and processing speed are all in continuous increase, the method of utilizing asynchronous sliding window formula MTD to promote the detection power of phased-array radar proposing for the present invention provides the foundation, guaranteeing under the target detection probability of radar and the prerequisite of angle measurement accuracy, promote MTD processing from Radar Signal Processing angle to greatest extent and count, reach the object that promotes radar coverage.
In tradition moving target detection radar Radar Signal Processing System, the treatment cycle t1 of MTD is consistent with data cycle t2 in time, i.e. synchronous (t1=t2).The asynchronous slidingtype MTD of indication of the present invention refers to and will in Radar Signal Processing System, adopt the treatment cycle t1 of different MTD and the data cycle t2(accumulation * PRI that counts, and PRI is pulse recurrence interval), i.e. asynchronous (t1 ≠ t2).As shown in Figure 1, the realization of this scheme comprises following steps to its principle:
Step 1, transmitting subsystem adopt the external radiation signal of identical PRF regardless of frame;
Phased-array radar comprises transmitting subsystem and HF receiving subsystem, and transmitting subsystem is responsible for external radiation signal, and HF receiving subsystem is responsible for receiving signal.
Step 2, determine MTD data cycle t2 according to the maximum residence time of wave beam;
The design objective of step 3, the concrete radar system of basis, in conjunction with the processing power of concrete radar signal processor, divides MTD treatment cycle t1;
This step must guarantee that t1, much smaller than t2, is as the criterion to reach system specific design index by the superior processing hardware platform of selectivity.
Step 4, MTD Data Update cycle are set to consistent with t1, adopt the mode of FIFO to complete Data Update;
Based on above step, the present invention can keep longer data cycle t2 in realizing the shorter treatment cycle t1 of employing, be transformed in radar system, the former is equivalent to the target observation number of times that has both kept more, and the latter has guaranteed that the accumulation of maximized coherent counts.More target observation number of times and then mean higher target detection probability and angle measurement accuracy, maximized coherent accumulation is counted and is meaned under equal conditions maximized detection power.
According to radar power formula: R max = [ PG t G r λ 2 σ t ( 4 π ) 3 k T o B N F N ( S / N ) min L s ] 1 4 , Wherein, equivalent bandwidth B n=1*10 6/ (τ * N), N is that coherent accumulation is counted.
Because the technical program and conventional radar systems design proposal radio-frequency front-end are consistent, therefore except equivalent bandwidth B noutward, other parameters are all consistent, in conventional radar systems, and equivalent bandwidth B nin N=t1/PRI.And in this programme, equivalent bandwidth B nin N=t2/PRI, be therefore not difficult to draw, the present invention, with respect to traditional Radar Signal Processing System, under equal conditions can promote power doubly.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, it should be pointed out that all any modifications of doing within the spirit and principles in the present invention, be equal to replacement and improvement etc., within all should being included in protection scope of the present invention.

Claims (3)

1. utilize asynchronous slidingtype MTD to promote a method for the detectivity of phased-array radar, it is characterized in that, the method comprises the following steps:
(1) transmitting subsystem adopts the external radiation signal of identical PRF regardless of frame;
(2) determine MTD data cycle t2 according to the maximum residence time of wave beam;
(3) divide MTD treatment cycle t1;
(4) the MTD Data Update cycle is set to unanimously with t1, adopts the mode of FIFO to complete Data Update.
2. a kind of method of utilizing asynchronous slidingtype MTD to promote the detectivity of phased-array radar according to claim 1, it is characterized in that, treatment cycle t1 is according to the design objective of concrete radar system, determines in conjunction with the processing power of concrete radar signal processor.
3. a kind of method of utilizing asynchronous slidingtype MTD to promote the detectivity of phased-array radar according to claim 1, is characterized in that, must select the processing hardware platform of certain treatment effeciency to guarantee that t1 is much smaller than t2.
CN201410141737.5A 2014-04-10 2014-04-10 Method for improving detectivity of phased array radar using asynchronous sliding type MTD Pending CN103913730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410141737.5A CN103913730A (en) 2014-04-10 2014-04-10 Method for improving detectivity of phased array radar using asynchronous sliding type MTD

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CN201410141737.5A CN103913730A (en) 2014-04-10 2014-04-10 Method for improving detectivity of phased array radar using asynchronous sliding type MTD

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106610488A (en) * 2015-10-23 2017-05-03 中国飞行试验研究院 Radar detection power measurement method
CN107450070A (en) * 2017-04-14 2017-12-08 电子科技大学 Phased-array radar wave beam and residence time combined distributing method based on target following

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US20090096662A1 (en) * 2006-11-02 2009-04-16 Jian Wang Moving Target Detector for Radar Systems
CN102841341A (en) * 2012-09-03 2012-12-26 深圳先进技术研究院 Pulse radar moving-target detection method
CN103605122A (en) * 2013-12-04 2014-02-26 西安电子科技大学 Receiving-transmitting type robust dimensionality-reducing self-adaptive beam forming method of coherent MIMO (Multiple Input Multiple Output) radar

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US4931800A (en) * 1989-05-12 1990-06-05 Raytheon Company Stagger compensated moving target detector
US20090096662A1 (en) * 2006-11-02 2009-04-16 Jian Wang Moving Target Detector for Radar Systems
CN102841341A (en) * 2012-09-03 2012-12-26 深圳先进技术研究院 Pulse radar moving-target detection method
CN103605122A (en) * 2013-12-04 2014-02-26 西安电子科技大学 Receiving-transmitting type robust dimensionality-reducing self-adaptive beam forming method of coherent MIMO (Multiple Input Multiple Output) radar

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宋宝兰: ""基于带状像的目标分辨与运动目标识别"", 《中国优秀硕士学位论文全文数据库信息科技辑》 *
杨虎军: ""某雷达信号处理***中的FPGA设计"", 《中国优秀硕士学位论文全文数据库信息科技辑》 *
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106610488A (en) * 2015-10-23 2017-05-03 中国飞行试验研究院 Radar detection power measurement method
CN107450070A (en) * 2017-04-14 2017-12-08 电子科技大学 Phased-array radar wave beam and residence time combined distributing method based on target following
CN107450070B (en) * 2017-04-14 2020-02-21 电子科技大学 Phased array radar wave beam and residence time joint distribution method based on target tracking

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Application publication date: 20140709