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High repetition frequency radar target track-before-detect method based on regional mapping ambiguity resolution

A radar target and de-blurring technology, applied in the research field of tracking before detection and track de-blurring technology, can solve the problems of distance ambiguity and accumulation, and achieve the effect of improving tracking accuracy

Active Publication Date: 2018-01-12
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

This method effectively solves the problem that the tracking-before-detection method cannot effectively accumulate along the target track caused by the ambiguity of the range under the multi-high repetition frequency radar system, so as to realize the detection and tracking of the target

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  • High repetition frequency radar target track-before-detect method based on regional mapping ambiguity resolution
  • High repetition frequency radar target track-before-detect method based on regional mapping ambiguity resolution
  • High repetition frequency radar target track-before-detect method based on regional mapping ambiguity resolution

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[0046] specific implementation plan

[0047] The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on Matlab2013. The present invention will be further described in detail with regard to specific embodiments below.

[0048] Step 1: System parameter initialization,

[0049] Initialization system parameters include: radar maximum detection range R max ; The maximum unambiguous distance R at each repetition frequency u1 =8020m,R u2 =8620m, R u3 =9140m; the number of radar repetition frequencies N=3; the ratio PRF of each repetition frequency 1 :PRF 2 …PRF N = 401:431:457; interval between frames T s =1s; the total number of observation frames K=6; the radar range resolution Δr=20m; the number of range dimension resolution units of the radar at each repetition frequency The number of resolution units in the range dimension of the radar at the maximum detection range is N max =2000; radar a...

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Abstract

The invention discloses a high repetition frequency radar target track-before-detect method based on regional mapping ambiguity resolution. The high repetition frequency radar target track-before-detect method overcomes the problem that a track-before-detect method cannot effectively track a target due to a blurred track of the target in a high repetition frequency system. The high repetition frequency radar target track-before-detect method is characterized by comprising the steps of subjecting a measuring plane of each repetition frequency to regional mapping on a distance dimension so as toobtain a dimension expansion plane, performing multi-frame joint accumulation of the dimension expansion planes of the repetition frequencies, and acquiring an ambiguity point sequence with high confidence coefficients, and finally acquiring an unambiguous target track by utilizing a track calibration method for solving range ambiguity. The high repetition frequency radar target track-before-detect method effectively solves the problem that the track-before-detect method cannot be applied to the high repetition frequency system radar with range ambiguity, and can realize stable detection andprecise tracking of a weak target by utilizing high repetition frequency radar fuzzy measurement.

Description

technical field [0001] The invention belongs to the technical field of radar target detection and tracking, and in particular relates to a tracking method before detection and track defuzzification technology research under a multi-high repetition frequency radar system. Background technique [0002] In modern warfare, the pulse Doppler radar operating in the high repetition frequency mode has a relatively high clutter-free area and can reduce the probability that the target echo falls in the main lobe clutter in the frequency domain and is blocked, avoiding frequency It is widely used in the detection of high radial velocity targets, airborne radar air detection and other fields. However, when the radar uses a high pulse repetition frequency, the distance measurement is blurred, that is, the distance measurement value cannot correctly reflect the true distance of the target. And with the increasingly complex radar detection environment and the maturity of target stealth te...

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Application Information

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IPC IPC(8): G01S13/72G01S13/58G05B13/04
Inventor 易伟文鸣王亚茹王经鹤李武军库飞龙孔令讲
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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