Method for improving sidelobe cancellation performance

A side lobe cancellation and performance technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of reduced cancellation performance and different delays between the main and auxiliary radar channels.

Active Publication Date: 2020-09-08
ANHUI BOWEI CHANGAN ELECTRONICS
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for improving radar sidelobe cancellation performance, so as to solve t

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  • Method for improving sidelobe cancellation performance
  • Method for improving sidelobe cancellation performance
  • Method for improving sidelobe cancellation performance

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Embodiment Construction

[0019] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] The invention aims at improving the performance of side lobe cancellation under the inconsistent time delay of main and auxiliary channels of radar in engineering design.

[0021] First, configure delay filters with different delay parameters (such as FARROW structure delay filters) for the main channel and auxiliary channel of the radar, and provide data storage functions for different delay parameters of different channels in different azimuths.

[0022] Secondly, before the anti-jamming, after the debugging state of the whole machine radar is fixed, the delay parameter test of each channel is carried out through the simulated interference experiment, and the delay parameter data files of each channel are measured. Its working principle is as follows: Release constant noise interference at a distance and azimuth that conforms to the far field, and...

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Abstract

The invention discloses a method for improving sidelobe cancellation performance. The method comprises the following steps: respectively configuring a time delay filter on a radar main channel and each auxiliary channel; calculating an azimuth difference value of real-time radar azimuth information and interference azimuth information sent from the outside, and searching an omnibearing time delayparameter file according to the azimuth difference value of the real-time radar azimuth information and the interference azimuth information to obtain time delay parameters of a main channel and eachauxiliary channel; and sending the obtained time delay parameter of each channel to a time delay filter of each channel, performing delay filtering processing on each piece of channel information, andproviding each channel signal subjected to delay filtering processing for sidelobe cancellation program module to perform sidelobe cancellation processing, wherein the omni-directional time delay parameter file is obtained through a simulation interference test, and comprises time delay parameters of a time delay filter corresponding to the optimal sidelobe cancellation performance of each channel under each azimuth difference value. According to the invention, the problem that the cancellation performance is reduced due to inconsistent delay between main and auxiliary channels of the radar in engineering is solved.

Description

technical field [0001] The invention belongs to the technical field of radar anti-jamming, and in particular relates to a method for improving sidelobe cancellation performance. Background technique [0002] With the rapid development of electronic countermeasure technology, it poses a serious threat to the working environment of radar. [0003] In response to radar sidelobe noise interference, airspace processing methods are mainly used to reduce the impact of interference, especially sidelobe cancellation techniques. [0004] However, in engineering practice, there are factors such as spatial multipath and poor channel consistency, and it is difficult to achieve the theoretical effect of sidelobe cancellation technology on sidelobe interference elimination. [0005] In the process of implementing sidelobe interference cancellation, the inventors found that in engineering, the delay inconsistency between the main and auxiliary channels of the radar will cause the cancellat...

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Application Information

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IPC IPC(8): G01S7/36G01S7/28
CPCG01S7/36G01S7/2813
Inventor 秦庆兵裴爱蕊
Owner ANHUI BOWEI CHANGAN ELECTRONICS
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