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Bistatic radar sea surface moving target detection method based on Beidou satellite radiation source

A bistatic radar and moving target technology, which is applied in the field of bistatic radar sea surface moving target detection based on Beidou satellite radiation source, can solve the problems of not well realizing distance migration correction, large amount of calculation, and Doppler centroid compensation process Complicated problems, to achieve the effect of realizing distance migration correction, reducing the amount of calculation, and solving the effect of low signal-to-noise ratio of echo

Active Publication Date: 2020-07-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, this method can only remove the first-order distance walking by using the first-order Keystone, and the second-order distance bending still exists, and the range migration correction is not well realized, and the Doppler centroid compensation has the problems of complex process and large amount of calculation

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  • Bistatic radar sea surface moving target detection method based on Beidou satellite radiation source
  • Bistatic radar sea surface moving target detection method based on Beidou satellite radiation source
  • Bistatic radar sea surface moving target detection method based on Beidou satellite radiation source

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[0039] 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.

[0040] Such as figure 1 As shown, it is a schematic flow chart of the bistatic radar sea surface moving target detection method based on the Beidou satellite radiation source of the present invention. A kind of bistatic radar sea surface moving target detection method based on Beidou satellite radiation source, comprising the following steps:

[0041] A. Initialize system parameters; said system parameters include azimuth sampling frequency f a , range sampling frequency f s , the target observation time T a ;

[0042] B. Use two antennas to record and demodulate the direct wave and the target...

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Abstract

The invention discloses a bistatic radar sea surface moving target detection method based on Beidou satellite radiation source, which adopts symmetrical second-order Keystone transformation to correct the distance migration for the echo signal under long observation time, and performs distance migration correction for the echo signal under the whole observation time The echo signal is subjected to unified deskewing processing, followed by frame processing, intra-frame signals are coherently accumulated, and inter-frame signals are non-coherently accumulated, which can effectively solve the problem of low signal-to-noise ratio of Beidou satellites as external radiation sources. . Due to the use of symmetric second-order Keystone transform, the range walking and range bending can be removed at the same time when the Doppler parameters are unknown, and the range migration correction can be better realized; and because of the energy accumulation process, the intra-frame signals only need to be added Computation, inter-frame signals do not need to perform Doppler centroid compensation operation, which greatly reduces the amount of computation.

Description

technical field [0001] The invention belongs to the technical field of bistatic radar moving target detection, and in particular relates to a bistatic radar sea surface moving target detection method based on a Beidou satellite radiation source. Background technique [0002] Unlike traditional radar transmitters that transmit signals and use receivers to receive target-reflected radar signals, external radiation source radars receive opportunistically irradiated source signals reflected by targets. Because the external radiation source radar itself does not emit signals, it has good concealment; because it does not emit signals, it can reduce volume and reduce costs; it can be used in large most areas. In recent years, with the increase of types and quantities of opportunistic radiation sources, the research on external radiation source radar is also increasing. [0003] Commonly used external radiation sources include FM signals, digital radio and television signals, and ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/42G01S19/24
CPCG01S19/24G01S19/42
Inventor 李中余黄川刘竹天李山川武俊杰杨海光黄钰林杨建宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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