北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (4): 82-85.doi: 10.13190/jbupt.200804.82.026

• 研究报告 • 上一篇    下一篇

基于并行干扰删除结构的CDMA下行接收机

许国平1,2,何 维3,张欣2,杨大成2   

  1. 1. 中国联通 研究设计院,郑州 450007;2. 北京邮电大学 电信工程学院,北京 100876;
    3. 重庆邮电大学 通信与信息工程学院,重庆 400065
  • 收稿日期:2007-07-08 修回日期:1900-01-01 出版日期:2008-08-30 发布日期:2008-08-30
  • 通讯作者: 许国平

CDMA Downlink Receiver Based on PIC Structure

XU Guo-ping1,HE Wei2,ZHANG Xin3,YANG Da-cheng3   

  1. 1. Research & Design Institute,China Unicom,Zhengzhou 450007,China;2. School of Telecommunication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China ;3. School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China
  • Received:2007-07-08 Revised:1900-01-01 Online:2008-08-30 Published:2008-08-30
  • Contact: XU Guo-ping

摘要:

通过分析重叠剪切(OC)法频域均衡(FDE)固有误差的产生原因和分布特点,提出了对其进行改进的方案——自适应重叠剪切(AOC)法;同时设计了一种基于非线性反馈的并行干扰删除(PIC)结构。通过非线性的处理,干扰删除迭代中所反馈的用户信息根据其可信度进行调整。理论分析和仿真结果表明,AOC法FDE复杂度较低,比原OC法FDE性能更好;非线性反馈的PIC进一步提高了接收机的性能。

关键词: 码分多址, 频域均衡, 重叠剪切法, 并行干扰删除

Abstract:

Firstly, after analyzing the generation and the distribution of the inherent error of overlap-cut (OC) method frequency domain equalization (FDE), the improved version of OC method called adaptive OC (AOC) method was proposed. Secondly, one parallel interference cancellation (PIC) structure based on non-linear feedback was designed. After nonlinear processing, the users’ feedback information during the PIC iteration was adjusted according to confidence. As a result of both analysis and simulation, AOC Method FDE outperforms the original OC Method with lower complexity. The non-linear feedback PIC further improves the performance of the receiver.

Key words: code division multiple access, frequency domain equalization, overlap-cut method, parallel interference cancellation

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