基于JADE的和差四通道抗多主瓣干扰算法

强压制干扰出现在雷达主瓣内时，雷达的探测效能会受到严重影响。对此，提出了基于矩阵联合对角化（Joint Approximation Diagonalization, JADE）的和差四通道抗多主瓣压制干扰算法。新方法利用JADE算法通过对和差四通道接收到的混合信号进行盲分离，然后对分离后的4个通道进行脉压处理，最后进行峰值检测以提取目标回波信息，从而有效抑制多主瓣压制干扰。仿真结果表明，该方法在主瓣干扰位于1/10个波束宽度时依然有效，性能比空域自适应处理方法有明显改善。

A Four-Channel Sum-Difference Algorithm Based on JADE for Suppressing Mainlobe Jamming

The radar performance degenerates severely when jamming enters into the radar mainlobe. Hence, this paper proposes a four-channel sum-difference algorithm based on JADE for suppressing mainlobe jamming. By use of joint approximation diagonalization algorithm, the mainlobe blanket jamming and the target can be separated. Then the target can be extracted by pulse compression. So, the multiple blanket mainlobe jammings can be suppressed. Simulation results indicate that the new algorithm can suppress multiple blanket mainlobe jammings even when the jammings are located at the 1/10 3 dB beamwidth and its performance is better than the spatial adaptive processing method.