多用户检测与信道估计相结合的性能分析  

Performance Analysis of Multiuser Detection with Channel Estimation

作　　者：吴俊[1] 王艺[1] 张红[1] 吴伟陵[1] 

机构地区：[1]北京邮电大学信息工程系

出　　处：《北京邮电大学学报》1999年第2期81-84,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金

摘　　要：提出了一种采用卡尔曼滤波估计平坦瑞利衰落信道的方法，并结合解相关检测、两级干扰抵消检测和判决反馈检测３种多用户检测的同步ＣＤＭＡ系统分析了其性能．计算机仿真结果表明，在低信噪比的情况下，两级干扰抵消和判决反馈检测的性能好于解相关检测；在高信噪比时，两级干扰抵消和判决反馈检测反而不如解相关检测．A new method which use the Kalman filter as the Rayleigh flat fading channel estimator is presented, and the performance analyses of decorrelator,two stage detector and decision feedback detector with the channel estimator are conducted. The simulated results show the performance of two stage detector and decision feedback detector is better than that of decorrelator in low SNR region, but for high SNR,the former have higher bit error rate.

关 键 词：码分多址联接 多用户检测 信道估计 

分 类 号：TN911.23[电子电信—通信与信息系统]