北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2004, Vol. 27 ›› Issue (2): 118-122.

• 研究报告 • 上一篇    

CDMA系统下行信道的分数阶间隔

吕旌阳, 吴伟陵   

  1. 北京邮电大学 信息工程学院, 北京 100876
  • 收稿日期:2003-02-20 出版日期:2004-02-28
  • 作者简介: 吕旌阳(1969—),男,博士生。 E-mail:lujingyang@tom.com
  • 基金资助:
    国家自然科学基金资助项目(60172051); 国家“863计划”资助项目(2001AA123016)

Fractionally Spaced Channel Estimation and Equalizationfor
Synchronous DS-CDMA Downlink with Aperiodic Spreading Code

LU·· Jing-yang, WU Wei-ling   

  1. Information Engineering School, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2003-02-20 Online:2004-02-28

摘要: 提出一种应用于非周期扩频的CDMA系统下行信道的分数阶间隔信道估计算法,以及在信道估计结果基础上得到的均衡算法。这些算法克服了以往的Chip速率采样的信道估计和均衡算法固有的缺陷,得到了完备的信道参数的估计,改善了均衡的效果。计算机仿真验证了算法的性能。

关键词: 码分多址, 分数阶间隔信道估计, 均衡

Abstract: In the paper, fractionally spaced channel estimationand equalization algorithms are proposed for a synchronous CDMA system that usesaperiodic spreading code. Algorithms overcome the defects of the former algorithms used for signal sampled with chip rate, and obtain the complete channel response, therefore improve the performance of the equalization. Simulations have demonstrated the performance of proposed algorithm.

Key words: DS-CDMA, fractionally channel estimation, equalization

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