OFDM signal detection in doubly selective channels with blockwise whitening of residual intercarrier interference and noise

Hai Wei Wang*, David W. Lin, Tzu-Hsien Sang

*Corresponding author for this work

研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)

摘要

Orthogonal frequency-division multiplexing (OFDM) is a popular broadband wireless transmission technique, but its performance can suffer severely from the intercarrier interference (ICI) induced by fast channel variation arising from high-speed motion. Existing ICI countermeasures usually address a few dominant ICI terms only and treat the residual similar to white noise. We show that the residual ICI has high normalized autocorrelation and that this normalized autocorrelation is insensitive to the multipath channel profile as well as a variety of other system and channel conditions. Consequently, the residual ICI plus noise can be whitened in a nearly channel-independent manner, leading to significantly improved detection performance. Simulation results confirm the theoretical analysis. In particular, they show that the proposed technique can significantly lower the ICI-induced error floor in maximum-likelihood sequence estimation (MLSE) designed to address a few dominant ICI terms.

原文English
文章編號6180091
頁(從 - 到)684-694
頁數11
期刊IEEE Journal on Selected Areas in Communications
30
發行號4
DOIs
出版狀態Published - 1 五月 2012

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