基于协方差矩阵变换的相干源个数估计

Determining the Number of Coherent Signal Based on Covariance Matrix transforming

正确地估计信号源个数是高分辨阵列信号处理的一个重要组成部分,本文提出了一种相干源个数估计的方法。这种方法是先采用空间平滑技术对信号源去相关,然后对阵列协方差进行酉变换,最后用基于协方差矩阵变换的信息论准则和盖氏半径(Gerschgorin Radii)两种方法估计信号源个数。计算机仿真结果证实了方法的可行性。

Correctly determining the number of signal is an important component of signal processing in high resolution array,a method for determining the number of coherent signal in this paper. Using spatial Smoothing technology to get rid of signals' coherent at first, then using a unitary matrix to transform the covariance matrix, the number of signal can be determined by information theoretic criteria or Gerschgorin Radii based on transformed covariance matrix. Computer simulation confirms the methods availability.