基于自适应滤波的雷达目标-干扰分离技术

Separation Method of Radar Target and Jamming Based on the Adaptive Filter

提出一种基于自适应滤波的雷达目标-干扰分离技术。在无法直接获取辅助通道数据的情况下,通过研究雷达回波信号与干扰信号的自相关衰减特性,将雷达接收信号作为主通道输入,进一步将其经过时间补偿后,作为辅助通道的输入;对辅助通道信号经过自适应滤波,在最小均方差意义下得到主通道中真实回波的有效估计;在此基础上,得到干扰信号的估计,从而实现对目标信号与干扰信号的有效分离;最后,通过仿真验证了这种方法的有效性。

In this paper, a separation method of radar target and jamming based on the adaptive filter is presented. In the case that the data of auxiliary channel can＇t be got directly, the attenuation characteristics of the autocorrelation function of real echo signal and jamming signal received by radar are analyzed. The received signal of radar is regarded as the main channel input. Moreover, the auxiliary channel input is obtained by time compensation to the main channel input. When an adaptive filter is applied to the auxiliary channel signal, an effective estimation of real echo in main channel is achieved in the sense of linear mean square minimi- zation. Thereafter, we get the estimation of jamming signal. Thus, the real target and jamming signal are effectively separated. Fi- nally, the efficiency of the presented method is validated by simulation experiments.