基于ANSG的雷达信号DOA估计算法  

Radar Signal DOA Estimation Algorithm Based on Adaptive Noise Subspace Generation

作　　者：曾小东[1] 

机构地区：[1]中国西南电子技术研究所,四川成都610036

出　　处：《无线电工程》2017年第5期32-36,共5页Radio Engineering

基　　金：国家部委基金资助项目

摘　　要：针对阵列信号处理中雷达信号的波达方向(DOA)估计,提出自适应噪声子空间生成(ANSG)算法。通过数值方法,得到阵列接收信号的协方差矩阵,以迭代方式处理约束最小化问题,实现ANSG。根据噪声子空间的表达式获得DOA估计,并且先验信息可以很好地融入算法的流程中,能够有效地解决复杂环境下的多信号源DOA估计问题。仿真结果表明,该算法适用于单频、线性频率调制以及二进制相移键控雷达信号,DOA估计精度和运算速度优于MUSIC。This paper proposes an Adaptive Noise Subspace Generation （ANSG） algorithm for the Direction of Arrival （DOA） estimation of radar signal in the area of array signal processing.The covariance matrix of the received signal is obtained by numerical methods.Then,the constrained minimization problem is solved iteratively for the ANSG.With the expression of the noise subspace, the DOA estimation is gained. Furthermore, the algorithm can readily incorporate prior knowledge into the DOA estimation process and efficiently estimate DOAs of muhiple sources under complex environment. The simulation results show that it is applicable for monopulse,LFM and BPSK radar signals.This algorithm is better than MUSIC in terms of the accuracy and speed of DOA estimation.

关 键 词：噪声子空间 超分辨 波达方向估计 

分 类 号：TN911.7[电子电信—通信与信息系统]