阵列模型误差条件下稳健的DOA估计算法  

Robust DOA Estimation Algorithm in the Presence of Array Uncertainty

作　　者：郭艺夺[1] 张永顺[1] 童宁宁[1] 宫健[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800

出　　处：《上海航天》2010年第1期31-35,共5页Aerospace Shanghai

摘　　要：为改善阵列误差时高分辨到达方向(DOA)估计算法的性能,引入精确校正的辅助阵元,应用子空间原理,提出了一种均匀线阵存在阵列误差条件下鲁棒DOA估计及方位依赖的幅相误差矩阵和互耦矩阵的估计算法。算法的方位估计无需任何阵列误差信息,估计精度高、分辨力强,且基于信源方位的精确估计,算法还可精确估计方位依赖的幅相误差矩阵和互耦矩阵,实现阵列误差的自校正。算法的运算量较小,无需高维非线性优化搜索,只需一维搜索。仿真结果证明了算法的正确性和有效性。Many classical direction of arrival （DOA） estimation algorithm s suffer from sensitivity to array uncertainty. To improve the performance of direction of arrival estimation algorithm with array error, a robust subspace-based DOA estimation algorithm that used some carry-on instrumental sensors in the presence of array uncertainty was proposed for uniform linear array （ULA） in this paper. A favorable DOA estimation could be reached and no knowledge of the array uncertainty was exploited for the new algorithm. An accurate of gain and phase uncertainty matrix and mutual coupling matrix could also be achieved for array self-calibration. Because of not referring to the high-dimensional nonlinear optimizing search but only one-dimensional search, the calculating burden of the algorithm was fewer. The simulation results showed that the accuracy and validity of the algorithm were approved.

关 键 词：阵列误差 DOA估计 稳健性 MUSIC算法 

分 类 号：TN953.3[电子电信—信号与信息处理]