一种稳健的自适应波束形成算法

A Robust Adaptive Beam Forming Algorithm

一般自适应波束形成的主瓣和零陷比较尖锐,当存在指向误差,干扰信号或天线平台快速运动时,若实时处理速度跟不上,将导致干扰抑制能力下降,采用高速处理算法代价太大。本文研究了利用导数约束法来改进广义旁瓣相消器的稳健性,对信号的自相关矩阵进行改进,使主瓣和零陷展宽,仿真试验表明该方法对指向误差和当干扰或天线平台快速运动时都具有很好的稳健性。

The null and main lobe generated by real-time general adaptive beam forming arithmetic are generally sharp. When the estimated direction of the desired signal is not accurate, or the jammer or the antenna platform moves rapidly, and if the speed of real-time processing can not keep up with that of jammer or the platform, the ability to suppress the jamming will decline and the cost of using high speed processing will be too much. This paper studies improving the robustness of generalized sidelobe canceller （GSC） by derivative restriction. The autocorrelation matrix of the signal has been improved by using restricted arithmetic of differential coefficient so that the null and the main lobe are broadened. Simulations show that the ability of suppress the jamming is not affected and this approach still has good robustness even if the estimated direction of the desired signal is not accurate or the jammer or antenna platform moves rapidly.