关键词: 宽带信源, 空间谱估计, 聚焦 DOA, 正交投影

Abstract:

A novel algorithm using the orthogonal projection is proposed, which avoids initially estimating the DOA and the number of sources through angle scanning and covariance 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.

Key words: wideband sources, spatial spectrum estimation, focusing, DOA, orthogonal projection