超定低秩数据阵信号子空间的快速获取

针对超定低秩数据阵，利用超定低秩数据阵左右奇异矢量之间的关系与反幂法以及L－D－LT分解，研究信号处理中如何快速获取信号子空间，给出了一种获取信号子空间的快速算法，它比直接采用划值分解的运算量明显减少，并具有很高的精度，适合于相关的信号处理。

Fast Retrieval of Signal Subspace of Over-Determined Low-Rank Data Matrix

To investigate fast retrieval of signal subspace in signal processing applications in reference to a kind of over determined low rank data matrix, the paper makes use of the relationship between left and right singular vectors of singular value decomposition, the anti power method and L D L T decomposition, and presents a fast algorithm in the retrieval of signal subspace. It obviously involues less computational complexity than is singular value decomposition, attains higher precision, and is suitable for corresponding signal processing.