Effects of Channel Estimation Error in the Presence of CFO on OFDM BER in Frequency-Selective Rayleigh Fading Channels

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Title:	Effects of Channel Estimation Error in the Presence of CFO on OFDM BER in Frequency-Selective Rayleigh Fading Channels
Authors:	Yih, Chi-hsiao
Contributors:	淡江大學電機工程學系
Keywords:	Orthogonal frequency division multiplexing;Channel estimation;Carrier frequency offset;Frequencyselective Rayleigh fading;Bit-error-rate;Performance analysis
Date:	2008-07-01
Issue Date:	2011-05-20 10:00:18 (UTC+8)
Publisher:	Academy Publisher
Abstract:	In this paper, we study the effects of channel estimation error on the bit-error-rate (BER) of orthogonal frequency division multiplexing (OFDM) systems in frequency-selective slowly Rayleigh fading channels. Due to the additive white Gaussian noise (AWGN) and the intercarrier interference (ICI) caused by the residual carrier frequency offset (CFO), the channel estimation based on the training symbols is not perfect. We characterize the performance degradation resulting from imperfect channel state information (CSI) by deriving the BER formulas for BPSK, QPSK, 16-QAM, and 64-QAM modulation schemes. The derived BER formulas contain no numerical integrals and can be evaluated easily and accurately. Simulation results validate the correctness of our theoretical analysis.
Relation:	Journal of Communications 3(3), pp.10-18
Appears in Collections:	[Graduate Institute & Department of Electrical Engineering] Journal Article

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