BER of OFDM in Rayleigh fading environments with selective diversity

Authors:
Khoa N. Le
Affiliations:
(Member, IEEE) Centre for Wireless Monitoring and Applications, Griffith School of Engineering, Griffith University, QLD 4222, Australia
Venue:
Wireless Communications & Mobile Computing
Year:
2010

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Abstract

This paper derives the analytical bit error rate (BER) of orthogonal frequency division multiplexing (OFDM) systems employing selective diversity in Rayleigh fading environments. First, the probability density function (pdf) of inter-carrier interference (ICI) power in Rayleigh fading environments is derived. Second, the pdf of the signal-to-interference ratio (SIR) is then derived. The cumulative distribution function (cdf) and hence pdf of the SIR with selective diversity are then given in the third and fourth steps. Using the BER expressions of binary phase shift keying (BPSK) and differential BPSK (DBPSK) modulation in an added white Gaussian noise (AWGN), the corresponding BER expressions of OFDM systems can then be derived. Detailed discussions are given. Possible future work is also outlined. Copyright © 2009 John Wiley & Sons, Ltd. This paper derives the average bit error rate (BER) of orthogonal frequency division multiplexing(OFDM)systems employing selective diversity in Rayleigh fading environments. The probability density functions (pdfs) of the signal-to-interference ratio (SIR) with and without selective diversity are derived. Average BER expressions of OFDM-BPSK and OFDM-DBPSK can be obtained.