標題: OFDM Signal Detection in Doubly Selective Channels with Whitening of Residual Intercarrier Interference and Noise
作者: Wang, Hai-wei
Lin, David W.
Sang, Tzu-Hsien
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 2010
摘要: Orthogonal frequency-division multiplexing (OFDM) transmission in time-varying channels suffers from intercarrier interference (ICI). Existing ICI countermeasures usually address a few dominant ICI terms only and treat the residual as similar to white noise. We show that the residual ICI has high normalized autocorrelation and that this normalized autocorrelation is insensitive to the maximum Doppler frequency and the multipath channel profile, among other things. The residual ICI can thus be whitened in a largely channel-independent manner, leading to significantly improved detection performance. Simulation results confirm the theoretical analysis. In particular, they show that the proposed technique can lower the ICI-induced error floor by several orders of magnitude in maximum-likelihood sequence estimation (MLSE) designed to address a few dominant ICI terms.
URI: http://hdl.handle.net/11536/25865
ISBN: 978-1-4244-2519-8
ISSN: 1550-2252
期刊: 2010 IEEE 71ST VEHICULAR TECHNOLOGY CONFERENCE
顯示於類別:會議論文