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A tracking-before-detection method for high-repetition radar targets based on area map deblurring

A radar target and defuzzification technology, which is applied in the research field of tracking before detection and track defuzzification technology, can solve problems such as distance ambiguity and accumulation, and achieve the effect of improving tracking accuracy

Active Publication Date: 2020-05-12
UNIV OF ELECTRONICS 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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  • A tracking-before-detection method for high-repetition radar targets based on area map deblurring
  • A tracking-before-detection method for high-repetition radar targets based on area map deblurring
  • A tracking-before-detection method for high-repetition radar targets based on area map deblurring

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Embodiment Construction

[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 tracking method before detection based on area map defuzzification, which overcomes the problem that the tracking-before-detection method cannot effectively track the target due to the ambiguity of the target track under the high repetition rate system. Its characteristic is that firstly, the measurement planes of each repetition frequency are area-mapped in the distance dimension to obtain the expanded dimension plane, and then the multi-frame joint accumulation is performed on the expanded dimension planes of each repetition frequency respectively, and the high-confidence degree is obtained after detection. Fuzzy dot track sequence, and finally use the track calibration method to solve the range ambiguity to get the unambiguous target track. It effectively solves the problem that the tracking-before-detection method cannot be applied to the high-repetition-frequency system radar with range ambiguity, and can realize stable detection and precise tracking of weak targets by using high-repetition-frequency radar ambiguity 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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Patent Type & Authority Patents(China)
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 ELECTRONICS SCI & TECH OF CHINA
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