上行MIMO MC-CDMA系统联合的检测  

Joint V-BLAST and Multiuser Detection in Uplink MIMO MC-CDMA Systems

作　　者：刘文雯[1] 杨维[1] 

机构地区：[1]北京交通大学现代通信研究所

出　　处：《系统仿真学报》2007年第9期2058-2060,2108,共4页Journal of System Simulation

基　　金：国家自然科学基金(60572036);东南大学移动通信国家重点实验室开放基金(W200703)

摘　　要：将多输入多输出(MIMO)技术应用于传统的MC-CDMA方案,构成MIMO MC-CDMA系统,能在很大程度上提高MC-CDMA方案的性能。提出了一种上行MIMO MC-CDMA系统联合的V-BLAST(Vertical-Bell Labs Layered Space-Time)和多用户检测算法,该算法首先分别对每个用户采用一种改进的基于最小均方误差(MMSE)的迭代干扰抵消V-BLAST检测获得两组不同的检测数据,然后联合所有的用户运用最大似然(ML)准则对迭代中间结果进行选择从而实现性能优化。仿真结果表明所提出算法显著提高了系统的误码率(BER)性能。Applying MIMO technique in conventional MC-CDMA scheme to form MIMO MC-CDMA system will enhance the system performanceof MC-CDMA. A joint V-BLAST （Vertical-Bell Labs Layered Space-lime） and multiuser detection algorithm for MIMO MC-CDMA system was proposed. Based on a modified iterative interference cancellation V-BLAST detection with minimum mean squared error （MMSE ） , two groups of detection data were obtained for each user, and then maximum-likelihood （ML ）scheme was applied on the iterative output of all users to select the better group of data to optimize system performance. Simulation results show that the proposed algorithm improves the BER performance of the system significantly.

关 键 词：多输入多输出 垂直贝尔实验室分层空时结构 多载波码分多址 多用户干扰 多用户检测 

分 类 号：TN929.533[电子电信—通信与信息系统]