Optimal Filtering Algorithm-Based Multiuser Detector for Fast Fading CDMA Systems  

作　　者：张玲 张贤达 

机构地区：[1]Department of Automation, Tsinghua University

出　　处：《Tsinghua Science and Technology》2007年第6期663-668,共6页清华大学学报（自然科学版（英文版）

基　　金：Supported by the Basic Research Foundation of Tsinghua Na-tional Laboratory for Information Science and Technology (TNList) ;the Major Program of the National Natural Science Foundation of China (No. 60496311)

摘　　要：A multiuser detector was developed for fast fading code-division multiple-access systems by representing the channels as a system with the multiplicative noise （SMN） model and then using the known optimal filtering algorithm for the SMN for multiuser detection （MUD）. This multiuser detector allows the channel response to be stochastic in one symbol duration, which can be regarded as an effective method of MUD for fast fading CDMA systems. Performance analyses show that the multiuser detector is theoretically valid for CDMA systems over fast fading channels. Simulations show that the multiuser detector performs better than the Kalman filter-based multiuser detector with a faster convergence rate and lower bit error rate.A multiuser detector was developed for fast fading code-division multiple-access systems by representing the channels as a system with the multiplicative noise （SMN） model and then using the known optimal filtering algorithm for the SMN for multiuser detection （MUD）. This multiuser detector allows the channel response to be stochastic in one symbol duration, which can be regarded as an effective method of MUD for fast fading CDMA systems. Performance analyses show that the multiuser detector is theoretically valid for CDMA systems over fast fading channels. Simulations show that the multiuser detector performs better than the Kalman filter-based multiuser detector with a faster convergence rate and lower bit error rate.

关 键 词：multiuser detection multiplicative noise optimal filtering code-division multiple-access fading channel 

分 类 号：TN929.533[电子电信—通信与信息系统]