一种动态重构的直达波干扰抑制方法

A Method of Direct Wave Interference Suppression Based on Dynamic Reconstruction

噪声调频连续波雷达具备抗干扰能力良好、截获概率低等优势,应用领域十分广泛,但是在实际应用中,由于存在多径时延、多普勒偏移等复杂因素,强直达波干扰严重影响到了其目标探测性能。针对该问题,文中提出了一种动态重构的直达波干扰抑制方法,与基于最小均方算法的常规直达波抑制方法进行对比,该方法对复杂多径场景具有更好的适应性。基于多基地雷达场景进行的仿真分析表明:该方法有效提高了复杂场景直达波对消效果,并对实际系统中存在的信号不相关问题具有良好的鲁棒性。

There are many advantages of continuous wave radar based on the noise frequency modulation,such as good anti-interference ability and low probability of interception,and it has a wide range of applications.However,due to complex factors such as multi-path delays and Doppler shifts,target detection performance is seriously affected by strong direct wave interference in practical application.To solve this problem,a method of direct wave interference suppression based on dynamic reconstruction is proposed in this paper.Compared with the conventional direct wave suppression method based on least mean square algorithm,this method has better applicability in complex multipath scenarios.Simulation analysis based on multi-base radar scene shows that the method can effectively improve the direct wave cancellation effect in complex scene,and has greater robustness to the signal uncorrelated problems existing in the actual system.