一种新颖的DOA估计算法

周祎; 冯大政; 刘建强

一种新颖的DOA估计算法

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出版历程
- 收稿日期: 2004-04-05
- 修回日期: 2004-08-20
- 刊出日期: 2005-10-19

A Novel Approach to DOA Estimation

摘要

摘要: 子空间类波达方向(Direction Of Arrival, DOA)估计算法的关键在于得到高质量的信号子空间估计。该文利用矩阵伪逆的双正交性，针对源信号不相关而其本身是色信号的情况，给出了一种新颖的DOA估计算法，它不需要知道噪声统计特性。该算法利用一组空时相关矩阵的结构化信息，能稳健而精确地估计出信号子空间，从而得到DOA的精确估计。仿真实验证实了所给算法的有效性。
- 阵列信号处理; 色噪声;信号子空间; DOA估计; 空时相关矩阵
Abstract: The key issue of the subspace-based Direction Of Arrival (DOA) estimation lies in the estimation of signal subspace with high quality. In the case of uncorrelated signals while the signals are temporally correlated ones, a novel approach for estimation of DOA in unknown correlated noise fields is proposed. Based on the biorthogonality between a matrix and its Moore-Penrose pseudo-inverse, the proposed method makes no assumptions on the spatial covariance matrix of the noise. The approach exploits the structural information of a set of spatio-temporal correlation matrices, and gives a robust and precise estimation of signal subspace to obtain a precise estimation of DOA. The performances are confirmed by computer simulation results.

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参考文献(1)

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