北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2006, Vol. 29 ›› Issue (3): 53-56.doi: 10.13190/jbupt.200603.53.lixj

• 论文 • 上一篇    下一篇

双衰信道下多天线正交频分复用系统最优频域导频设计方案

李小军 ,尹长川 ,乐光新   

  1. 北京邮电大学 数字通信与信息网络实验室 北京100876
  • 收稿日期:2005-06-01 修回日期:1900-01-01 出版日期:2006-06-30 发布日期:2006-06-30
  • 通讯作者: 李小军

Optimum Pilot Tone Design for MIMO-OFDM Systems over Doubly-Selective Channels

LI Xiao-jun ,YIN Chang-chuan ,YUE Guang-xin   

  1. Laboratory of Digital Communications and Information Networks,Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2005-06-01 Revised:1900-01-01 Online:2006-06-30 Published:2006-06-30
  • Contact: LI Xiao-jun

摘要:

基于双衰信道的频域响应,提出了一类双衰信道下多天线正交频分复用(MIMO-OFDM)系统的最优化频域导频设计方案。推导了相应的模型,给出了基于导频的最大似然信道估计器的均方误差下界,并以此下界为标准,设计了多天线正交频分复用系统的最优导频。仿真表明,基于设计最优导频的信道估计器可以在低复杂度下取得接近理论界的性能,但是复杂度增加。

关键词: 双衰信道, 信道估计, 最优导频设计

Abstract:

This paper investigates the multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) transmission over doubly selective channels and focuses on maximum likelihood channel estimator using pilot tones in frequency domain. We derived the system model for MIMO-OFDM over doubly selective channels. Using this model,we gave the lower bound of the mean squared error of maximum likelihood channel estimator and this bound was served as the design criterion to derive the optimum pilot tones. Simulations show that the channel estimator using the proposed pilot can approach the theoretical lower bound.

Key words: doubly-selective channels, channel estimaion, optimum pilot tone

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