A Novel Multiuser Detector for Asynchronous CDMA System  

作　　者：LIANGXint SHANGYong LIANGQinglin XIANGHaige 

机构地区：[1]DepartmentofElectronics,PekingUniversity,Beijing100871,China

出　　处：《Chinese Journal of Electronics》2004年第1期133-136,共4页电子学报（英文版）

摘　　要：The decorrelating and the MMSE (Minimum mean square error) multiuser detector for asynchronous CDMA (Code devision multiple access) system are ideally anticausal infinite memory-length detectors. Asa result~ in practice they have to be approximately implemented with finite-memory structure, and the process delay in detection is unavoidable. Based on the analysis of a new signal model for asynchronous system, a novel multiuser detector for asynchronous CDMA system is proposed in this paper~ which is termed as DF-IC-MMSE (Decision ,feedback interference cancellation-MMSE) detector. It's the detection statistics that makes the DF-IC-MMSE-detector basically different from other traditional ones. The DF-IC-MMSE detector can be ideally implemented with Causal finite memory-length structure, and cause no delay in symbol detection. Simulations show that the performance of DF-IC-MMSE detector is almost identical to that of the ideal MMSE detector.

关 键 词：多用户发现 CDMA 异步码分多址 移动通信 MMSE 判定反馈 

分 类 号：TN929.533[电子电信—通信与信息系统]