Doppler fuzzy target coherent detection method and device based on periodic Keystone transformation

A Doppler ambiguity and detection method technology, applied in the field of radar signal processing, can solve the problems of limited application, radar signal target error, and efficiency reduction, and achieve the effect of expanding the Doppler frequency range

Inactive Publication Date: 2019-09-10
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology

[0004] For this reason, the present invention provides a Doppler fuzzy target coherent detection method and device based on periodic Keystone transform, which solves the problems of introducing errors, limited application, performance loss, and efficiency reduction in the existing radar signal target detection, and has great advantages. Strong application prospects

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  • Doppler fuzzy target coherent detection method and device based on periodic Keystone transformation
  • Doppler fuzzy target coherent detection method and device based on periodic Keystone transformation
  • Doppler fuzzy target coherent detection method and device based on periodic Keystone transformation

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[0041] In order to make the purpose, technical solution and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and technical solutions.

[0042] In view of the problems that the recognition efficiency and performance cannot be balanced in the existing fuzzy target coherent detection, in the embodiment of the present invention, see figure 1 As shown, a Doppler fuzzy target coherent detection method based on periodic Keystone transform is provided, including the following content:

[0043] S101) Obtain the radar signal of the measured target, and construct a Doppler fuzzy target signal model;

[0044] S102) According to the Doppler ambiguous target signal model, by eliminating the Doppler undersampling caused by the high speed of the target and / or the low pulse repetition of the radar, the searchless detection of the Doppler ambiguous target is realized. ...

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Abstract

The invention belongs to the technical field of radar signal processing, and particularly relates to a Doppler fuzzy target coherent detection method and device based on periodic Keystone transformation. The method comprises the following steps that a radar signal of a target to be detected is acquired, and a Doppler fuzzy target signal model is constructed; and according to the Doppler fuzzy target signal model, the Doppler fuzzy target is detected without searching by eliminating Doppler undersampling caused by high speed of the target and / or low pulse repetition of a radar. According to themethod, a discrete Fourier transform redundancy period is introduced into Keystone transform, so that the Doppler frequency range is expanded, and Doppler undersampling caused by high speed of the target or low pulse repetition frequency of the radar is eliminated; the coherent accumulation detection of the target is realized through the fast Fourier transform and the fast Fourier inverse transform, and the Doppler fuzzy target can be detected without searching; and the high efficiency and the optimal detection performance of the scheme are further verified through simulation experiments andactual measurement of radar processing result data, so that the Doppler fuzzy target coherent detection method and device based on periodic Keystone transformation has certain application value in engineering.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to a method and device for coherent detection of Doppler fuzzy targets based on periodic Keystone transform. Background technique [0002] In recent years, with the rapid development of stealth aircraft and Unmanned Aerial Vehicles (UAV), the problem of radar target detection has received more and more attention. In order to detect such low radar cross-section (RCS) targets, long-term coherent accumulation is an indispensable means. Unfortunately, range migration (RM) and Doppler frequency ambiguity [15-17] are unavoidable for targets during the accumulation time, which will seriously deteriorate the performance of traditional accumulation algorithms such as moving target detection (MTD). Therefore, how to overcome these two problems becomes the key to improving the radar detection capability. [0003] At present, many algorithms have been proposed to solve the abo...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41G01S7/414
Inventor 靳科赖涛黄洁
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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