适用于任意阵列的鲁棒波束形成算法

A Robust Beamforming Algorithm for Arbitrary Array

针对期望信号来波角度误差和干扰快速变化导致的导向矢量失配问题,本文提出了一种新型的零陷展宽鲁棒自适应波束形成算法.该算法重构接收信号的协方差矩阵,根据大致的期望信号角度约束平顶主瓣波束,提出了迭代算法来解决经过上述处理步骤后得到的非凸的优化问题.仿真显示,本文提出的算法相比于传统算法对来波角度误差及干扰快速变化拥有更好的鲁棒性,且该算法适用于任意阵列.

Aiming at the steering vector mismatch caused by the angle error of the desired signal and the rapid change of the interference,a novel null broadening robust adaptive beamforming algorithm was proposed in this paper.Firstly,a covariance matrix was reconstructed for the received signal,and then the flattened main lobe beam was constrained according to the approximate desired signal angle.Finally,an iterative algorithm was proposed to solve the non-convex optimization problem after the above processing steps.The simulation results show that the proposed algorithm has better robustness than the traditional algorithm to the mismatch of signal angle and the rapid change of interference.Being applicable to arbitrary arrays,the algorithm possesses great practical significance in engineering.