Random pulse Doppler radar angle-Doppler imaging method based on compressed sensing

A Doppler radar, random pulse technology, applied in the direction of radio wave reflection/re-radiation, instruments, measuring devices, etc., can solve the problems of easy interception of transmitted waveforms, poor anti-interference ability, etc., to improve clutter suppression and The effect of target detection performance, strong anti-interference ability, and low interception ability

Active Publication Date: 2017-01-11
SHENZHEN UNIV
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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a random pulse Doppler radar angle-Doppler imaging method based on compressed sensing, aiming to solve the problem of uniform pulse emission

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  • Random pulse Doppler radar angle-Doppler imaging method based on compressed sensing
  • Random pulse Doppler radar angle-Doppler imaging method based on compressed sensing
  • Random pulse Doppler radar angle-Doppler imaging method based on compressed sensing

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] The present invention proposes a random PRF pulse Doppler radar system based on compressed sensing from the perspective of solving the problem of pulse Doppler ambiguity, improving the practical value of the system and the anti-interference ability of the system. Due to the introduction of random pulses, it can effectively eliminate Doppler ambiguity and reduce the ability of radar waveforms to be intercepted; due to the reduction of the number of transmitted pulses, the practical value of the system can be effectively improved, and by transmitting multiple groups within a CPI time The radar...

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Abstract

The invention discloses a random pulse Doppler radar angle-Doppler imaging method based on compressed sensing. The method comprises the following steps of 1, obtaining space-time compressed sampling data on the basis of a radar system; 2, performing spatial discretization treatment on Doppler frequency space and spatial frequency in the space-time compressed sampling data, and obtaining a space-time oriented dictionary; 3, on the basis of the space-time oriented dictionary, estimating a space-time power spectrum, and obtaining an angle-Doppler image containing clutter and targets. The method effectively solves the problem of target and clutter Doppler ambiguity, improves the clutter suppression and target detection performance, lowers the number of pulses transmitted by a radar system, and can transmit other radar waveforms or observe multiple angles at the same time at identical pulse coherent processing intervals, thereby effectively improving the radar time dimension complexing ability; on the condition of the identical pulse number, the Doppler resolution capability can be effectively improved; the radar waveform low intercept and capture capacity and the anti-jamming capability are stronger.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and more specifically relates to a random pulse Doppler radar angle-Doppler imaging method based on compressed sensing. Background technique [0002] Space-Time Adaptive Processing (STAP) is an important technology for clutter suppression and moving target detection in airborne radar systems. The traditional STAP method requires a high number of training samples, and it is difficult to obtain a large number of samples to design a space-time filter in a non-uniform and non-stationary clutter environment. Such as auxiliary channel method (Auxiliary Channel Processor, ACP), principal component method (Principle Components, PC), local joint processing (joint domain localized, JDL) method, multistage Wiener filter Multistage Winer Filter, MWF) algorithm, auxiliary feature A series of dimensionality reduction or rank reduction algorithms such as the vector method (Auxiliary Eigenvector Processor...

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Application Information

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IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 阳召成全桂华黄建军黄敬雄
Owner SHENZHEN UNIV
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