Approach for wideband direction-of-arrival estimation in the presence of array model errors  

作　　者：Chen Deli Zhang Cong Tao Huamin Lu Huanzhang 

机构地区：[1]ATR Laboratory, School of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, P. R. China

出　　处：《Journal of Systems Engineering and Electronics》2009年第1期69-75,共7页系统工程与电子技术（英文版）

基　　金：supported by the National "863" High Technology Research and Development Program of China(2007AA703428)

摘　　要：The presence of array imperfection and mutual coupling in sensor arrays poses several challenges for development of effective algorithms for the direction-of-arrival （DOA） estimation problem in array processing. A correlation domain wideband DOA estimation algorithm without array calibration is proposed, to deal with these array model errors, using the arbitrary antenna array of omnidirectional elements. By using the matrix operators that have the memory and oblivion characteristics, this algorithm can separate the incident signals effectively. Compared with other typical wideband DOA estimation algorithms based on the subspace theory, this algorithm can get robust DOA estimation with regard to position error, gain-phase error, and mutual coupling, by utilizing a relaxation technique based on signal separation. The signal separation category and the robustness of this algorithm to the array model errors are analyzed and proved. The validity and robustness of this algorithm, in the presence of array model errors, are confirmed by theoretical analysis and simulation results.The presence of array imperfection and mutual coupling in sensor arrays poses several challenges for development of effective algorithms for the direction-of-arrival （DOA） estimation problem in array processing. A correlation domain wideband DOA estimation algorithm without array calibration is proposed, to deal with these array model errors, using the arbitrary antenna array of omnidirectional elements. By using the matrix operators that have the memory and oblivion characteristics, this algorithm can separate the incident signals effectively. Compared with other typical wideband DOA estimation algorithms based on the subspace theory, this algorithm can get robust DOA estimation with regard to position error, gain-phase error, and mutual coupling, by utilizing a relaxation technique based on signal separation. The signal separation category and the robustness of this algorithm to the array model errors are analyzed and proved. The validity and robustness of this algorithm, in the presence of array model errors, are confirmed by theoretical analysis and simulation results.

关 键 词：DIRECTION-OF-ARRIVAL array model errors wideband. 

分 类 号：TN911.7[电子电信—通信与信息系统] TP212[电子电信—信息与通信工程]