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Multi-repetition frequency radar target tracking-before-detection method adopting extended table auxiliary method to resolve ambiguity

A radar target and defuzzification technology, which is applied to measurement devices, radio wave measurement systems, and radio wave reflection/re-radiation, etc., can solve the problems of high processing and calculation cost, distortion of measurement information, and less effective real measurement information. , to achieve the effect of low algorithm complexity, solving measurement information distortion, and simple defuzzification process

Active Publication Date: 2017-11-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to: aim at the above-mentioned existing problems, provide a multi-frequency radar target tracking method before detection of multi-frequency radar target detection with the auxiliary method of table expansion, which solves the problem of high computational cost of traditional defuzzification algorithm and less effective real measurement information. The problem of not being able to effectively recover the target track
This method effectively solves the problem of distortion of measurement information after traditional defuzzification algorithm processing, thus realizing accurate tracking of targets under the multi-high repetition frequency radar system

Method used

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  • Multi-repetition frequency radar target tracking-before-detection method adopting extended table auxiliary method to resolve ambiguity
  • Multi-repetition frequency radar target tracking-before-detection method adopting extended table auxiliary method to resolve ambiguity
  • Multi-repetition frequency radar target tracking-before-detection method adopting extended table auxiliary method to resolve ambiguity

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Embodiment

[0032]The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on Matlab2013. see figure 1 , 2 , the concrete realization process of the present invention comprises the following steps:

[0033] Step 1: System parameter initialization:

[0034] Initialization system parameters include: radar maximum detection range R max =2000; the number of radar repetition frequencies N=3; the ratio PRF of each repetition frequency 1 :PRF 2 …PRF N =401:431:457; the maximum unambiguous distance R at each repetition frequency u1 =401,R u2 =431, R u3 =457; the total number of observation frames K=6; the radar distance resolution Δr=1; the radar azimuth resolution Δaz=1; the number of radar distance dimension resolution units 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; the number of radar azimuth resolution un...

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Abstract

The present invention discloses a multi-repetition frequency radar target tracking-before-detection method adopting an extended table auxiliary method to resolve ambiguity and belongs to the radar target detection and tracking technical field. According to the method, a multi-repetition frequency auxiliary extended table considering measurement and quantization errors is established so as to be adopted to perform ambiguity resolution on multi-repetition frequency points; the clutter and noise suppression capacity of a tracking-before-detection method is adopted to effectively suppress ambiguity resolution-post false points; and the real flight track of a target can be restored ultimately. With the method of the invention adopted, the technical problem of measurement information mismatch of a traditional ambiguity resolution algorithm due to the restrictions of remainder theorem application conditions and the technical problem of the incapability of the tracking-before-detection method to correctly accumulate the energy of a target under an ambiguous space can be solved, the detection and tracking of the target under a multi-repetition frequency radar system can be realized. The extended table auxiliary method adopted in the invention can greatly reduce the amount of computation required by ambiguity resolution.

Description

technical field [0001] The invention belongs to the technical field of radar target detection and tracking, and in particular relates to the research on the range ambiguity resolution and multi-frame joint accumulation technology of multi-high repetition frequency radar. Background technique [0002] High-PRF radars have good Doppler resolution and can obtain unambiguous measurements in the Doppler dimension, but the observed distance information will be highly ambiguous. In the radar system, the way of multi-frequency work is often used to improve the accuracy of radar measurement, and at the same time solve the problem of range ambiguity. The fuzzy algorithm using the Chinese remainder theorem has a high time complexity. It not only requires that the fuzzy distances solved at each repetition frequency be mutually prime, but also does not consider the measurement and quantization errors of the received echo data at each repetition frequency. Therefore, part of the measurem...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/72
CPCG01S13/726
Inventor 易伟王亚茹文鸣孟令同李武军库飞龙孔令讲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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