北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 1999, Vol. 22 ›› Issue (2): 81-84.

• 研究报告 • 上一篇    下一篇

多用户检测与信道估计相结合的性能分析

吴俊, 王艺, 张红, 吴伟陵   

  1. 北京邮电大学信息工程系, 北京 100876
  • 收稿日期:1998-09-30 出版日期:1999-03-10
  • 基金资助:
    国家自然科学基金重大资助项目(69896243)

Performance Analysis of Multiuser Detection with Channel Estimation

Wu Jun, Wang Yi, Zhang Hong, Wu Weiling   

  1. Department of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876
  • Received:1998-09-30 Online:1999-03-10

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.

关键词: 码分多址联接, 多用户检测, 信道估计

Abstract: 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.

Key words: code division multiple access, multiuser detection, channel estimation

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