A Blind Spatial Signature Estimation Algorithm Based on 4th Order Cumulant
Zhou Wei①②; Zhou Zheng-zhong①; Zhang De-min②
①College of Communication of UESTC, Chengdu 610054, China;②Key lab of mobile communications, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Abstract：Based on uniform linear array and 4th order cumulant of array output signals, a novel blind algorithm for spatial signature estimation was presented in this paper, and was applied to estimate spatial signature of multi-user with coherent multi-path. Using 4th order cumulant, the author constructed a spatial signature matrix , and then proved that multi-user’s spatial signature can be obtained through eigen decomposition of the matrix. The algorithm is not depended upon the specific characteristic of signal, and can be employed to additive arbitrary Gaussian (white or colored) noise. Theoretical analysis and computer simulation confirmed the availability and robustness of the algorithm.
2007, Vol. 29 
