一种利用非圆信号特点的实值DOA估计算法  

DOA Estimation Algorithm for Non-circular Sources Using Real-Value Algorithm

作　　者：郑春弟[1] 冯大政[2] 雷革[1] 

机构地区：[1]海军兵种指挥学院舰艇装备教研室,广州510430 [2]西安电子科技大学雷达信号处理国家重点实验室,西安710071

出　　处：《数据采集与处理》2009年第2期193-197,共5页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金(60372049)资助项目

摘　　要：针对非圆信号波达方向(DOA)估计问题,提出了一种ESPRIT类的实值DOA估计算法。根据信号源为实数的特点,分别求取接收数据的实部和虚部,形成实值数据,并对其加以重新组合,提高了数据利用率,减少了运算量,在此基础上利用新构造数据的结构特点形成一个实值对角矩阵,进而得到一种ESPRIT类的DOA估计算法。该算法通过使用两个选择矩阵获得旋转因子,避免了信道附加相位对DOA估计的影响。仿真实验表明,该算法具有分辨力高、估计精度高以及稳健性强等优点。Based on the estimation signal parameters via rotational invariance techniques, an algorithm for estimating the direction of arrival （DOA） of non-circular sources is proposed. By exploiting the array geometry and the property of non-circular sources, the real part （or imaginary part） of the complex-valued measurements is obtained to reconstruct a real-value covariance model. Moreover, the algorithm uses two selection matrices to obtain rotational factor, thus avoiding the effect of an arbitrary phase introduced by the transmission channel to DOA. Because the reconstructed covariance matrix is a real-valued matrix, the algorithm can reduce the complexity of computation. Simulation results show that the algorithm improves the resolution power and noise robustness of the classical estimation signal parameter via rotational invariance technique （ESPRIT） algorithm.

关 键 词：阵列信号处理 ESPRIT算法 波达方向估计 非圆信号 

分 类 号：TN911.7[电子电信—通信与信息系统]