用于多天线无线通信的 DOA 估计算法

一种用于多天线无线通信的 DOA 估计算法

内容简介：在多天线系统中可以利用 MUSIC 算法估计来波方向,但当在相关信源、非静态噪声功率及较低信噪比的环境下,该算法分辨特性较差.为了解决以上问题,提出一种重构矩阵算法,通过组合新的满秩协方差矩阵来构建信号子空间和噪声子空间,从而避免了相关信源协方差矩阵降秩和空间谱漏谱.仿真表明,该方法在强相关信号源和非静态噪声的情况下能检测到全部来波信号.

Abstract：In a multi?antenna system,a MUSIC algorithm estimates the direction?of?arrival of coherent signals. While in the case of strong coherent sources,non?static noise and low SNR,the resolution performance of the algorithm is poor. To solve the problem,a matrix reconstruction algorithm is proposed. A new signal subspace and a noise subspace are established by combin?ing a full rank covariance matrix,which avoids the source covariance matrix related to reduced rank and space frequency spec?trum leakage. The simulation demonstrates that the proposed algorithm can detect all the incoming wave signals under the condi?tion of strong coherent sources and nonstationary noise fields.

作者：周冬跃, 周海然, 黄灿群, 叶翠婵, 蓝志豪, 魏振棠, 谭达晓, 林海全,

关键词：DOA 估计, MUSIC 算法, 相关信源, 多天线,