Blind adaptive receiver based on RLS-CMA for TH-UWB system  

作　　者：KANG Xiao-fei YANG Jia-wei MEN Shuo 

机构地区：[1]State Key Laboratory of Integrated Service Networks, Xidian University, Xi＇an 710071, China [2]College of Electronic Information and Automation, Chongqing University of Technology, Chongqing 400054, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2011年第6期38-43,共6页中国邮电高校学报（英文版）

基　　金：supported by the National Science Fund for Distinguished Young Scholars (60725105);the National Basic Research Program of China (2009CB320404);the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) (IRT0852);the 111 Project (B08038);Scientific Research Program Funded by Shaanxi Provincial Education Commission (2010JK666)

摘　　要：A novel receiver is proposed in this paper that uses the blind adaptive multi-user detection （MUD） technique to deal with the presence of multiple-access interference （MAI） and inter-symbol interference （ISI） in terms of high speed time-hopping ultra-wideband （TH-UWB） system. The receiver firstly adopts constrained recursive least squares constant modulus algorithm （RLS-CMA） to conduct adaptive decorrelation for eliminating MAI and ISI, and then uses projection approximation subspace tracking with deflation （PASTd） algorithm to launch channel estimation, do maximal ratio combining （MRC） and improve signal to interference plus noise ratio （SINR）. The simulation results show that the proposed receiver can go to convergence rapidly under all four IEEE＇s UWB channel models, the bit error ratio （BER） performance is better than that of the traditional receiver and rake receiver.A novel receiver is proposed in this paper that uses the blind adaptive multi-user detection （MUD） technique to deal with the presence of multiple-access interference （MAI） and inter-symbol interference （ISI） in terms of high speed time-hopping ultra-wideband （TH-UWB） system. The receiver firstly adopts constrained recursive least squares constant modulus algorithm （RLS-CMA） to conduct adaptive decorrelation for eliminating MAI and ISI, and then uses projection approximation subspace tracking with deflation （PASTd） algorithm to launch channel estimation, do maximal ratio combining （MRC） and improve signal to interference plus noise ratio （SINR）. The simulation results show that the proposed receiver can go to convergence rapidly under all four IEEE＇s UWB channel models, the bit error ratio （BER） performance is better than that of the traditional receiver and rake receiver.

关 键 词：ultra-wideband （UWB） time hopping （TH） recursive least squares （RLS） constant modulus algorithm （CMA） PASTd 

分 类 号：TN929.533[电子电信—通信与信息系统] TN914.4[电子电信—信息与通信工程]