OFDM-MIMO雷达转发式主瓣干扰自适应抑制方法  

Forward main lobe jamming adaptive suppression method for OFDM-MIMO radar

作　　者：熊智敏 王党卫[2] 李星辉 XIONG Zhimin;WANG Dangwei;LI Xinghui(College of Information and Comunication,National Univesity of Defense Technology,Wuhan 430010,China;Early Warning Technology Department,Air Force Farly Warning Acadeny,Wuhan 430019,China)

机构地区：[1]国防科技大学信息通信学院,湖北武汉430010 [2]空军预警学院预警技术系,湖北武汉430019

出　　处：《国防科技大学学报》2023年第1期25-34,共10页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61901480)。

摘　　要：转发式干扰因与雷达发射波形的高度相关性,经雷达主瓣接收后易对雷达产生严重的干扰作用。为解决主瓣干扰问题,建立正交频率分集调频多输入多输出(orthogonal frequency division multiplexing-multiple input multiple output,OFDM-MIMO)雷达主瓣接收的转发式干扰信号模型,分析了该干扰对OFDM-MIMO雷达的干扰机理;同时基于自适应方法处理理论,推导了OFDM-MIMO雷达自适应处理权向量解析式,提出了基于距离依赖波束的OFDM-MIMO雷达转发式主瓣干扰自适应抑制方法。理论研究和仿真结果表明,提出的方法提高了输出信干噪比,实现了转发式主瓣干扰的有效抑制。Because of the high correlation between the forward jamming and the radar transmitting waveform,it is easy to cause serious jamming to the radar after being received by the radar main lobe.In order to solve the main lobe interference problem,the forward interference signal model of OFDM-MIMO(orthogonal frequency division multiplexing-multiple input multiple output)radar main lobe was established,and the interference mechanism of OFDM-MIMO radar was analyzed.At the same time,based on the adaptive method processing theory,the analytical formula of OFDM-MIMO radar adaptive processing weight vector was derived,and an OFDM-MIMO radar forward main lobe interference adaptive suppression method based on range-dependent beam was proposed.Theoretical research and simulation results show that the proposed method can improve the output signal to interference plus noise ratio and effectively suppress the forward main lobe interference.

关 键 词：正交频率分集 多输入多输出雷达 转发式主瓣干扰 方位-距离两维自适应处理 

分 类 号：TN95[电子电信—信号与信息处理]