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基于频率波形分集的近程雷达组网干扰抑制策略

2021-10-19尹伟洪永彬鲁振兴

现代信息科技 2021年5期

尹伟 洪永彬 鲁振兴

摘  要:随着无人机威胁的逐渐增大,利用传统中远程雷达完成城市、山地等复杂地形区域无人机探测所需代价极高。利用近程雷达组网完成区域覆盖成为一个重要技术方向,然而大量雷达组网的实现还需要解决雷达间的互相干扰问题。文章介绍了雷达组网的蜂窝分布模型与干扰信号形式,然后提出综合采用频率分集、波形分集与信道抑制的干扰抑制策略,对不同等效距离的干扰进行抑制,并给出了典型参数下干扰抑制策略分析。

关键词:雷达组网;干扰抑制;频率分集;波形分集

中图分类号:TN957.51      文献标识码:A 文章编号:2096-4706(2021)05-0090-03

Interference Suppression Strategy for Short Range Radar Network Based on Frequency Waveform Diversity

YIN Wei,HONG Yongbin,LU Zhenxing

(The 54th Research Institute of CETC,Shijiazhuang  050081,China)

Abstract:With the increasing threat of unmanned aerial vehicles(UAV),the traditional medium and long range radar has a high cost for UAV detection in complex terrain areas such as cities and mountains. It is an important technical direction to use the short-range radar network to complete the area coverage. However,the mutual interference between radars needs to be solved for the realization of a large number of radar network. This paper introduces the cellular distribution model of radar network and the form of jamming signal,and then puts forward the jamming suppression strategy of combining frequency diversity,waveform diversity and channel suppression to suppress the jamming of different equivalent distances,and gives the analysis of jamming suppression strategy under typical parameters.

Keywords:radar network;interference suppression;frequency diversity;waveform diversity

0  引  言

隨着无人机技术的发展,无人机对城市、山地等复杂地理环境下的重要目标的威胁也逐渐增强[1,2]。而大型雷达在上述环境中对无人机等低空目标进行空域覆盖与有效探测的费效比极低,利用日渐成熟的小型雷达进行组网探测成为一种极为经济的选择。然而,小型雷达作用距离有限,覆盖大范围区域需要大量雷达组网,雷达易产生互相干扰。

本文基于大型雷达干扰抑制的经验进行了小型雷达组网干扰抑制策略研究。首先介绍了雷达组网的蜂窝分布模型,然后分析了雷达组网干扰的形式。基于上述分布模型与干扰形式,进行了干扰抑制策略的研究,综合考虑了频率分集、波形分集与信号抑制等多种手段,并基于典型的雷达性能进行了干扰抑制分析。

1  雷达组网与组网干扰

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