MC-CDMA系统中一种预处理线性受限多用户检测算法  

A Pre-processed Linearly Constrained Multi-user Detection Algorithm in MC-CDMA System

作　　者：傅洪亮[1] 酆广增[1] 

机构地区：[1]南京邮电学院通信工程系

出　　处：《信号处理》2008年第3期431-433,共3页Journal of Signal Processing

基　　金：国家自然科学基金(60472104);河南省教育厅自然科学研究计划项目(2008A510003);河南省基础与前沿技术研究(072300410450);河南工业大学科研基金(07XZZ009)

摘　　要：本文提出了MC-CDMA系统中一种预处理线性受限最小二乘恒模多用户检测算法(Pre-processed Linearly Con- strained Least Squares Constant Modulus Multi-user detection Algorithm),称为P-LCLSCMA。它是对MC-CDMA接收信号进行预处理,即在每次迭代中,用已估信道参数先消除信道在各个子载波上对期望用户信号的影响,然后对处理后的信号用P- LCLSCMA算法进行多用户检测,从而确保了算法收敛于期望信号,提高了系统的检测性能。我们对这种新算法分别在下行链路和上行链路进行了仿真,仿真结果表明,本文提出的P-LCLSCMA算法的误码率和信干比性能得到了提高。A pre-processed linearly constrained least squares constant modulus multi-user detection algorithm （P-LCLSCMA） in MC-CDMA system is proposed in this paper. First the received signal is pre-processed,in other words ,the estimated channel parameters are used to eliminate the influence of the channel to the expected signal in every carrier,then the P-LCLSCMA is applied to the pre-processed signal. This ensures the algorithm converge to the expected signal and enhances the performance of the detector. The new algorithm is simulated in downlink and uplink separately. Simulation results show that the proposed algorithm in this paper can enhance the performance of BER and SINR.

关 键 词：多载波 CDMA 多用户检测 LCLSCMA 

分 类 号：TN929.533[电子电信—通信与信息系统] TN914.5[电子电信—信息与通信工程]