Clutter suppression method and device based on space-time interpolation

A clutter suppression, space-time technology, applied in the field of radar communication, can solve the problem of radar signal affecting communication efficiency, etc., and achieve the effect of improving the performance of moving target detection and improving work efficiency

Inactive Publication Date: 2015-04-22
GUANGXI UNIV
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Problems solved by technology

[0006] In order to solve the problem in the prior art that the clutter of the radar signal affects the communication efficiency, the present invention proposes a clutter suppression method and device based on space-time interpolation

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Embodiment Construction

[0025] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0026] In order to solve the problem in the prior art that the clutter of radar signals affects communication efficiency, the present invention proposes a method and device for suppressing clutter based on space-time interpolation.

[0027] Such as figure 1 As shown, the method includes:

[0028] Step S101: receiving the space-time signal of the onboard non-frontal array radar, and calculating the pitch angles of different fuzzy range gates corresponding to the lth range gate of the space-time signal;

[0029] Specifically, the echo slope distance of the m-th fuzzy range gate corresponding to the l-th range gate is calculated according to the following formula:

[0030] R ( ...

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Abstract

The invention discloses a clutter suppression method and device based on space-time interpolation. The method includes the steps that A, a space-time signal of airborne non-sidelooking array radar is received, and the pitching angles of different fuzzy range gates corresponding to the first range gate of the space-time signal are calculated; B, a short-distance clutter steering vector matrix VlN and a long-distance clutter steering vector matrix VlF corresponding to the first range gate are calculated; C, short-distance clutters are suppressed through the space-time interpolation technology according to the short-distance clutter steering vector matrix and the long-distance clutter steering vector matrix; D, the step A, the step B and the step C are repeatedly executed to all the range gates, and the space-time signals after short-distance clutter suppression is completed are acquired. By means of the clutter suppression method and device based on space-time interpolation, according to echoes received by a uniform linear array, the degree of freedom does not exist on the pitching dimension, non-detection zones of the main clutter positions corresponding to all the fuzzy range gates are detected, the clutters of the short-distance fuzzy range gates are suppressed, the moving target detection performance of a sidelobe area is improved, and the working efficiency of the radar is improved as well.

Description

technical field [0001] The present invention relates to the technical field of radar communication, in particular to a method and device for suppressing clutter based on space-time interpolation. Background technique [0002] Space-Time Adaptive Processing (STAP) technology can effectively suppress ground clutter and strong active interference caused by spectrum broadening of moving platforms, and improve the detection performance of ground moving targets. extensive attention of scholars. [0003] The performance of STAP processing is closely related to the accuracy of covariance matrix estimation of interference and clutter. However, in airborne radar systems (such as: airborne non-front-looking radar and airborne bistatic radar), the distribution of ground clutter has a serious distance dependence, which makes the estimation of the covariance matrix of clutter and interference have errors. , which in turn leads to a decrease in STAP processing performance. How to effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/2813G01S7/2928G01S13/50
Inventor 文珺王宁章蔡毓介燕菁加蒋庆
Owner GUANGXI UNIV
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