双站对消抗主瓣干扰技术研究

基于双站目标回波去相关、干扰信号相关条件给出了双站对消抗主瓣干扰的物理模型;结合自适应滤波提出了双站对消抗主瓣干扰算法,通过散射点模型对双站对消抗主瓣干扰算法的干扰抑制性能和信噪比损失性能进行了仿真和分析;并根据仿真条件构建了试验验证系统,进行了对应的试验验证。仿真和试验结果表明:在双站与目标夹角大于目标回波去相关角度的条件下,当干噪比大于30 dB 时,信干噪比改善大于25 dB。

Investigation on Dual Station Cancellation of Mainlobe Jamming Supperession Technology

According to the conditions of the noncorrelation of the target return signal and the correlation of the jam signal between two stations, the dual station cancellation model of mainlobe jamming is given. Based on the method of the adaptive filter in signal processing, the dual station cancellation algorithm of mainlobe jamming is presented. The performance of the jamming suppression and the loss of the signal-noise-ratio are analyzed and simulated, and then the corresponding experiment system is built and the verification is carried out. Simulation and experiment results show that when the target angle between the two stations is larger than the correlation angle of the target, and when the interference-to-noise ratio is greater than 30 dB, the ratio of signal to the interference and noise is improved more than 25 dB.