摘要
分布式干扰是一种近距离、空间密集型干扰,单基雷达常用的超低旁瓣天线、天线旁瓣对消和旁瓣匿影等技术难以与其进行有效对抗。双基条件下,远距离的目标和近距离的干扰机必将在其相对于发射阵列或接收阵列的角度上存在较大差异。利用该现象,提出了一种双基地MIMO雷达抗分布式干扰的方法。该方法通过发射阵列多阵元正交发射的方式在目标回波及转发式干扰信号中分别嵌入了目标和干扰机相对于发射阵列的角度信息,随后在接收阵列上通过等效收、发二维空域滤波处理即可有效地滤除分布式干扰信号。数值仿真的结果证明了该方法的有效性。
Traditional monostatic radar electronic counter-countermeasures（ECCM）techniques,such as the sidelobe cancellation technique,can not effectively suppress the distributed-jamming,since the jammers are densely distributed and close to the radar.However,under the bistatic configuration,the real targets and the jammers remarkably differ from each other in either the angles with respect to the transmitter or the angles with respect to the receiver.By exploiting such a phenomenon,a distributed-jamming suppression method is presented for the bistatic multiple input multiple output（MIMO）radar.Through orthogonal transmitting,the angle with respect to the transmitter is embedded in the target echoes and re-transmitted signals of the jammer.Then,the transmit-receive 2-D spatial filtering on the receiver can effectively suppress the distributed-jammings.The results of the numerical simulations demonstrate the effectiveness of the proposed method.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2014年第7期1298-1303,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(61001213
61301281)
航空科学基金(20132081010)资助课题
关键词
雷达抗干扰
分布式干扰
双基地雷达
多发多收
收、发二维空域滤波
radar electronic counter-countermeasures（ECCM）
distributed-jamming
bistatic radar
multiple input multiple output（MIMO）
transmit-receive 2-D spatial filtering
