空间特征的累量域估计算法与共信道相干源波达方向估计

Spatial Signature Estimation Algorithm in Cumulant Domain for Direction Finding of Co Channel Correlated Signals

提出了一种基于累积量的多用户空间特征估计算法，并将该算法用于智能天线系统中的多用户相干源波达方向（ＤＯＡ）估计．该算法构造了累量域空间特征矩阵，通过对空间特征矩阵的特征分解得到用户信号的空间特征估计．基于空间特征的估计，利用前后向平滑空间特征协方差矩阵估计共信道多用户信号的ＤＯＡ，并将各用户的ＤＯＡ自动分组．仿真实验验证了算法的有效性．

A multi user spatial signature estimation algorithm is presented.It is applied to correlate the source direction of arrival(DOA) for smart antenna systems. The algorithm constructs a new matrix called spatial signature matrix in cumulant domain by application of eigen decomposition. Based on estimated spatial signature, direction of signal arrival can be estimated using forward and backward smoothing covariance matrix. Computer simulations is used to validate the algorithm.