异步CDMA系统中的CM多用户检测器  

Constant modulus multiuser detector for asynchronous CDMA systems

作　　者：杜健? 朱世华[1] 任品毅[1] 

机构地区：[1]西安交通大学电信学院信通系,西安710049

出　　处：《通信学报》2002年第11期21-28,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(69672017);西安交通大学重点培植项目(PZ007)

摘　　要：本文将恒模(CM)算法应用于异步CDMA系统的多用户信号检测。该CM检测器只要求了解目标用户的信息,运算较简单,且由于采用了自适应方法,检测器无需估计信号的幅度。分析及仿真结果均表明,CM检测器的误码性能和抗远-近效应能力均优于传统检测器,且对于用户数目的变化有很好的适应性。In this paper, the constant modulus (CM) algorithm is applied to the multiuser detection for asynchronous code-division multiple access (CDMA) systems. This CM detector, unlike most existing detectors that need global information of interfering sequences, requires only the information of the target user, and is therefore simple in calculation. Additionally, due to the automatic adaptation it adopts in the algorithm, the estimation of signal amplitude is no longer a necessity. Analysis and simulation show that the CM detector outperforms the conventional detector in bit error performance and near-far resistance, and is insensitive to the change of the number of mobile users.

关 键 词：异步 CDMA系统 CM 多用户检测器 码分多址 恒定模值算法 移动通信 

分 类 号：TN929.533[电子电信—通信与信息系统]