Low-complexity and fast convergent multiuser detections for impulse UWB systems  

作　　者：郑霖 Qiu Hongbing 

机构地区：[1]Department of Communication ＆ Information Engineering, Guilin University of Electronic Technology, Guilin 541004, P.R. China

出　　处：《High Technology Letters》2008年第2期141-146,共6页高技术通讯（英文版）

基　　金：the National Natural Science Foundation of China(No60432040);the Guangxi Key Laboratory Foundation(No,063006-5G)

摘　　要：To solve the problem that the conventional detections in DS-CDMA suffer from high complexity and poor robustness for the time-hopping pulse signals, the received pulse signals were remodeled, and a mulfipath-free detection scheme, which provides a simple approach to select samples of received signals, was introduced. By this scheme, the subsequent multiuser detection （MUD） would get rid of the mis- match due to the correlative multipath signal in IR-UWB. In addition, a computationally efficient recur-sive least squares （RLS） type algorithm based on least mean fourth （LMF） criterion is derived to suppress multi-access interference. The proposed multiuser detection algorithm performs well at low complexity, even in dense muhipath environment.To solve the problem that the conventional detections in DS-CDMA suffer from high complexity andpoor robustness for the time-hopping pulse signals,the received pulse signals were remodeled,and amultipath-free detection scheme,which provides a simple approach to select samples of received signals,was introduced.By this scheme,the subsequent multiuser detection(MUD)would get rid of the mis-match due to the correlative muhipath signal in IR-UWB.In addition,a computationally efficient recur-sire least squares(RLS)type algorithm based on least mean fourth(LMF)criterion is derived to suppressmulti-access interference.The proposed multiuser detection algorithm performs well at low complexity,even in dense multipath environment.

关 键 词：ULTRA-WIDEBAND multiuser detection （MUD） multipath interference （MPI） leastmean fourth （LMF） 

分 类 号：TN925[电子电信—通信与信息系统]