基于分数域滤波处理的阵列雷达主瓣干扰抑制算法

A Fractional Domain Filtering Based Mainlobe Interference Suppression Algorithm for Array Radar

为提升主瓣干扰下阵列雷达探测性能,提出了一种分数域滤波处理的阵列雷达抗主瓣干扰抑制算法,可有效抑制主瓣干扰。通过分数阶傅里叶变换在分数域搜索主瓣干扰,根据峰值确定干扰在分数域的位置,从而在分数域进行滤波处理,然后对回波信号再进行阻塞矩阵处理,从而更好地滤除主瓣干扰。仿真实验验证了所提算法的有效性。

In order to enhance the detection performance of array radar under mainlobe interference,this paper proposes a method of radar anti-mainlobe interference based on fractional domain filtering,which can effectively suppress the mainlobe interferences.The proposed method searches for the mainlobe interference in the fractional domain by using fractional Fourier transform,determines the position of interference based on its peak values.The interference is then filtered in the fractional domain,and the echo signal is further processed by a blocking matrix to better eliminate the mainlobe interference.Simulation experiments validate the effectiveness of the proposed algorithm.