MIMO-OFDM快时变信道下的一种低复杂度的检测算法

俞菲; 杨绿溪

doi:10.3724/SP.J.1146.2005.01692

MIMO-OFDM快时变信道下的一种低复杂度的检测算法

doi: 10.3724/SP.J.1146.2005.01692

俞菲,
杨绿溪

基金项目:

国家自然科学基金(60272046)及重大基金(60496310)，教育部博士点基金(20020286014)和江苏省自然科学基金(BK2005061)资助课题

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出版历程
- 收稿日期: 2005-12-28
- 修回日期: 2006-07-10
- 刊出日期: 2007-07-19

A Low Complexity Detection Algorithm in Time-Varying OFDM System

Yu Fei,
Yang Lü-xi

摘要

摘要: OFDM系统中信道的快速变化会破坏载波间的正交性，产生载波间干扰(ICI)。该文基于快变信道的统计特性，分析了载波间干扰的频域表达式，设计了一种针对快时变OFDM系统载波间干扰的载波间干扰对消检测方案。它可以有效地补偿由于信道快速变化所产生的载波间干扰，从而提高系统性能。实验表明，该文提出的检测方案可以在计算复杂度很小的情况下，有效地抑制由于载波间干扰所产生的误码率性能的下降，并利用载波间分集提高系统性能。
- OFDM系统;快变信道;载波分集;干扰对消
Abstract: OFDM system is very sensitive to time-varying channel, which may cause inter-carrier interference. In this paper, a layered inter-carrier interference cancellation scheme is proposed for time-varying channel, with detailed analysis of inter-carrier interference in frequency domain. The scheme proposed in this paper can compensate for the ICI terms that significantly affect the bit-error rate of the system. Simulation result is also given to show the performance this new scheme achieved.

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参考文献(1)

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