Statistical Characteristics of OFDM Systems over Frequency-Selective Rician Fading Channels and Its Application to BER Study

Zhiwei MAO  Julian CHENG  

IEICE TRANSACTIONS on Communications   Vol.E94-B   No.9   pp.2565-2573
Publication Date: 2011/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.2565
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Frequency-selective Rician fading channel,  orthogonal frequency division multiplexing,  channel coding,  inter-carrier interference,  error performance analysis,  pairwise error probability,  

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Some statistical characteristics, including the means and the cross-correlations, of frequency-selective Rician fading channels seen by orthogonal frequency division multiplexing (OFDM) subcarriers are derived in this paper. Based on a pairwise error probability analysis, the mean vector and the cross-correlation matrix are used to obtain an upper bound of the overall bit-error rate (BER) in a closed-form for coded OFDM signals with and without inter-carrier interference. In this paper, the overall BER is defined as the average BER of OFDM signals of all subcarriers obtained by considering their cross-correlations. Numerical examples are presented to compare the proposed upper bound of the overall BERs and the overall BERs obtained by simulations.