Bi-static radar eustatic movement 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 problem of poorly realized range migration correction, complicated Doppler centroid compensation process, and computational complexity Large and other problems, to achieve the effect of distance migration correction, reduce the amount of calculation, and solve the effect of low signal-to-noise ratio of echo

Active Publication Date: 2018-12-28
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, an

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  • Bi-static radar eustatic movement target detection method based on Beidou satellite radiation source
  • Bi-static radar eustatic movement target detection method based on Beidou satellite radiation source
  • Bi-static radar eustatic movement 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 bi-static radar eustatic movement target detection method based on a Beidou satellite radiation source. The method comprises the following steps: performing range migration correction on an echo signal under long observation time by adopting symmetric second-order Keystone transform, and performing unified de-sloping processing on the echo signal under the whole observation time, and then performing the framing processing, performing coherent accumulation on an intra-frame signal and performing incoherent accumulation on an inter-frame signal, thereby effectively solving a problem that a Beidou satellite is low in target echo signal-to-noise ratio when being served as an external radiation source. The range motion and the range bending can be simultaneously removed under the condition of unknowing a Doppler parameter by adopting the symmetric second-order Keystone transform, so that the range migration correction can be better realized; since the intra-frame signal only needs to perform the addition computation and the inter-frame signal does not to perform Doppler centroid compensation operation when being in the energy accumulation processing, and the computation burden is greatly reduced.

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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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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