SUCCESSIVE BEAMFORMING,MULTIUSER DETECTION AND DIVERSITY RECEPTION FOR MULTICARRIER DS-CDMA SYSTEM WITH ANTENNA ARRAY  

作　　者：Yang Wei Chen Junshi Tan Zhenhui Cheng Shixin 

机构地区：[1]School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing 100044, China [2]National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

出　　处：《Journal of Electronics(China)》2007年第5期607-612,共6页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.60572036);Open Research Fund of National Mobile Communications Research Laboratory,Southeast University,China.

摘　　要：Code-Division Multiple-Access (CDMA) systems are interference limited,and therefore efficient interference management is necessary to enhance the performance of a CDMA system.In this paper,a successive beamforming (spatial filtering),linear decorrelating MultiUser Detection (MUD, temporal filtering) and diversity reception structure for uplink multicarrier Direct Sequence CDMA (DS-CDMA) system with antenna array are proposed.By beamforming,the antenna array suppresses interference according to the distinct array signature.Subsequently,linear decorrelating MUD is ap- plied to separate the signals of different users and eliminate Multiple Access Interference (MAI).Finally, the decorrelated signals at different subcarriers that belong to the same user are combined to achieve frequency diversity.Simulation results show that the proposed structure offers significant Bit Error Rate (BER) performance improvement by successively exploiting the space-time-frequency processing.Code-Division Multiple-Access （CDMA） systems are interference limited, and therefore efficient interference management is necessary to enhance the performance of a CDMA system. In this paper, a successive beamforming （spatial filtering）, linear decorrelating MultiUser Detection （MUD, temporal filtering） and diversity reception structure for uplink multicarrier Direct Sequence CDMA （DS-CDMA） system with antenna array are proposed. By beamforming, the antenna array suppresses interference according to the distinct array signature. Subsequently, linear decorrelating MUD is applied to separate the signals of different users and eliminate Multiple Access Interference （MAI）. Finally the decorrelated signals at different subcarriers that belong to the same user are combined to achieve frequency diversity. Simulation results show that the proposed structure offers significant Bit Error Rate （BER） performance improvement by successively exploiting the space-time-frequency processing.

关 键 词：Antenna array Multicarrier Direct Sequence Code-Division Multiple-Access （DS-CDMA） MultiUser Detection （MUD） Diversity 

分 类 号：TN82[电子电信—信息与通信工程]