基于正交投影的宽带相干信源空间谱测向算法  

Orthogonal projection-based spatial spectrum algorithm for finding the direction of the wideband coherent source

作　　者：谢锘[1] 张润生[2] 葛建华[1] 张建立[2] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071 [2]中国电子科技集团第五十四研究所,河北石家庄050081

出　　处：《西安电子科技大学学报》2010年第3期576-580,共5页Journal of Xidian University

基　　金：863计划资助项目

摘　　要：提出了一种新的相干信号子空间宽带信源空间谱测向算法,该方法通过角度扫描和数据协方差矩阵的正交投影处理,避免了到达角度的预估计和信源个数估计,从而提高空间谱测向的性能,论述了该算法的原理及其实现过程,并和现有算法进行了对比分析.仿真结果表明,在信噪比较低的情况下本算法有更好的角度分辨率和更低的均方根误差.A novel algorithm using the orthogonal projection is proposed, which avoids initially estimating the DOA and the number of sources through angle scanning and covarianee matrix orthogonal projection, thereby improving the performance of direction finding by the spatial spectrum. This paper discusses the principle and realization of this method, and we compare other algorithms with the one developed here whose performance is shown to be better under the condition of a low SNR. Computer simulation illustrates that the proposed method has a better angle resolution ability and a lower RMSE.

关 键 词：宽带信源 空间谱估计 聚焦DOA 正交投影 

分 类 号：TN957[电子电信—信号与信息处理]