上海交通大学学报(自然版)

• 无线电电子学、电信技术 • 上一篇    下一篇

一种快速时变信道下的单载波频域均衡算法

李四,归琳,熊箭
  

  1. (上海交通大学 无线通信研究所, 上海 200240)
  • 收稿日期:2009-09-10 修回日期:1900-01-01 出版日期:2010-09-28 发布日期:2010-09-28

A Frequency Domain Equalization Algorithm for SingleCarrier Systems over Fast TimeVarying Channels

LI Si,GUI Lin,XIONG Jian
  

  1. (Institute of Wireless Communications, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2009-09-10 Revised:1900-01-01 Online:2010-09-28 Published:2010-09-28

摘要: 借鉴多载波系统中的迭代和判决反馈干扰消除算法,提出一种适用于快速时变信道的单载波频域均衡算法.通过线性均衡得到信号的初始估计,从接收信号中迭代消除由于快速衰落所引起的符号间干扰,基于最小均方误差准则进行频域均衡,并将信道时变所造成的符号间干扰视为等效噪声.仿真结果表明,所提出的算法能够有效降低快速时变信道下的误码平层.

关键词: 快速时变信道, 迭代判决反馈, 频域均衡的单载波算法

Abstract: An iterative decision feedback frequency domain equalization algorithm for singlecarrier systems over fast timevarying channels was presented, referring to the intercarrier interference (ICI) cancellation schemes of multicarrier systems. The interference induced by fast fading was iteratively cancelled using a tentative estimation of the received signal obtained from linear equalization. The intersymbol interference induced by fast fading was treated as equivalent noise power during frequency domain equalization based on minimum meansquared error (MMSE) criteria. Simulations show that the proposed method using iteration and decisionfeedback can effectively lower the error floor in fast fading environment.

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