Efficient channel blind estimator for multiuser system with conjugate cyclostationarity  

作　　者：ZHOU Ke CAO Shi-ke ZHANG Li-jun 

机构地区：[1]Communication and Information Engineering College, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2008年第4期1-6,共6页中国邮电高校学报（英文版）

基　　金：Jiangsu Provincial Natural Science Foundation (BK2006235);the National Natural Science Foundation of China (60572130)

摘　　要：The problem of blind channel identification in a multiuser system is considered in this article. For this purpose, a blind identification algorithm is proposed based on the conjugate cyclostationarity of the received signal. The new approach contains a two-stage identification procedure. First, the separation technique in the cyclic domain is used to separate the second-order cyclic statistics for each user. Second, a subspace algorithm based on the rational subspace theory is exploited to estimate the desired channel. Theoretical analysis and simulation results show that this algorithm is suitable for a multiuser system. Compared with other methods, the algorithm shows good performance even in a bad situation when the number of users is large and the diversity condition is unavailable.

关 键 词：conjugate cyclostationarity rational subspace theory subspace algorithm 

分 类 号：TN91[电子电信—通信与信息系统]