Polarization suppression processing method for radar mainlobe interference

A technology of main lobe interference and processing method, which is applied in the processing of suppressing radar main lobe interference and the polarization suppression processing of interference signals, and can solve the problem that public materials for single-polarized antennas have not yet been found.

Active Publication Date: 2012-06-13
NAT UNIV OF DEFENSE TECH
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At present, no public information has been found on the use of the polarization charac

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  • Polarization suppression processing method for radar mainlobe interference
  • Polarization suppression processing method for radar mainlobe interference
  • Polarization suppression processing method for radar mainlobe interference

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[0043] The present invention will be further described in more detail below in conjunction with the drawings and specific implementation of the specification.

[0044] figure 1 It is a schematic flow diagram of the principle of the technical scheme of the present invention. As shown in the figure, the present invention includes five processing steps: the first step is to establish a function library on the polarization characteristics of the radar antenna; the second step is the preprocessing of the interference and target mixed signal; the third step is the interference and target mixed signal Orthogonal polarization decomposition processing; the fourth step, the polarization filtering vector estimation of the interference and target mixed signal; the fifth step, the spatial multi-notch polarization filtering of the interference and target mixed signal.

[0045] figure 2 It is a schematic diagram of the polarization characteristics of a certain type of radar antenna. The abscis...

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Abstract

The invention provides a polarization suppression processing method for radar mainlobe interference. The technical scheme is that: the method comprises the following five steps of: 1, constructing a function base relevant to a radar antenna polarization characteristic; 2, preprocessing an interference and target mixed signal; 3, performing orthogonal polarization decomposition processing on the interference and target mixed signal; 4, performing polarization filter vector estimation on the interference and target mixed signal; and 5, performing space domain multi-concave polarization filter on the interference and target mixed signal. A voltage matrix of the interference and target mixed signal is processed by using a least square algorithm, so that orthogonal polarization decomposition and estimation for the interference and target mixed signal are realized; and under the condition that a pitching angle cannot be acquired precisely, an interference signal is suppressed by using a space domain multi-concave virtual polarization filter. The polarization suppression processing method has no extra requirement on a hardware system, is easy to implement, and is high in engineering applicability.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and relates to a processing method for suppressing radar main lobe interference, in particular to a polarization suppression processing method for interference signals entering from the main lobe direction of a single-polarization and mechanical scanning radar antenna. Background technique [0002] Existing radar anti-jamming methods mainly focus on processing echo signals in the time domain, frequency domain or air domain, while relatively little research has been done in the signal polarization domain. The polarization information of the radar signal reflects the inherent properties of the target. By making full use of the difference between the polarization information of the target and the interference, a very special anti-jamming effect can be achieved. [0003] In recent years, with the gradual deepening of radar polarization theory research and the substantial improvement o...

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Application Information

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IPC IPC(8): G01S7/36
Inventor 王雪松李永祯戴幻尧常宇亮董健代大海李棉全
Owner NAT UNIV OF DEFENSE TECH
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