MMSE Multiuser Detector Alleviating Edge Effect in Asynchronous DS-CDMA Systems  

作　　者：WANGLing JIAOLicheng TAOHaihong LIUFang 

机构地区：[1]InstituteofIntelligentInformationProcessing,XidianUniversity,Xi＇an710071,China／／NationalKeyLaboratoryforRadarSignalProcessing,XidianUniversity,Xi＇an710071,China [2]NationalKeyLaboratoryforRadarSignalProcessing,XidianUniversity,Xi＇an710071,China [3]SchoolofComputerScienceandTechnology,XidianUniversity,Xi＇an710071,China [4]InstituteofIntelligentInformationProcessing,XidianUniversity,Xi＇an710071,China／／NationalKeyLaboratoryforRadarSignalProcessing,XidianUniversity,Xi＇an710071,China

出　　处：《Chinese Journal of Electronics》2005年第3期503-508,共6页电子学报（英文版）

摘　　要：Multiuser detection is a key technique in DS-CDMA systems. At the base station, the received signal is the compositive signal transmitted by active users in the system over asynchronous channels, the Multiple access interference (MAI) components of which is more serious than that in synchronous systems. In this paper, based on the compact matrix signal model of the asynchronous system, a MMSE (Minimum mean square error) Multiuser detector alleviating edge effect (MMSEAEE) with low complexity is proposed. The asymptotic efficiency, near-far effect resistance and computational complexity of the multiuser detector are analyzed qualitatively. Finally, the bit error rate is simulated via plentiful Monte Carlo numerical experiments. With performance analysis and numerical simulation, it is shown that MMSEAEE with low complexity offers significant performance improvement over some existing popular detectors in eliminating multiple access interference and near-far resistance.

关 键 词：MMSE 电子数据采集设备 数据处理 DS-CDMA MMSEAEE MAI 移动通信 

分 类 号：TN929.5[电子电信—通信与信息系统] TP274.3[电子电信—信息与通信工程]