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A Performance Analysis of OFDM Systems in Excessively Dispersive Multipath Channels  

Lee Woo-Kwon (Department of Electrical Engineering, University of Arkansas)
Curry Christopher S. (Department of Electrical Engineering, University of Arkansas)
Publication Information
Journal of Communications and Networks / v.8, no.3, 2006 , pp. 323-329 More about this Journal
Abstract
For orthogonal frequency division multiplexing (OFDM), the discrete Fourier transform (DFT)-based processing at the receiver has been perceived equivalent to the matched filter (MF)-based processing. In this paper, we revisit the equivalence and mathematically show that when the guard interval is insufficient, the well-known DFT-based processing inherently causes more intersymbol and interchannel interference (ISI/ICI) than the MF-based processing. Then, with the adverse increase of interference, analytical expressions for the link performance are derived in terms of bit error rate (BER). Numerical results from computer simulation and analysis are presented to justify our claims.
Keywords
Discrete Fourier transform (DFT); dispersive multipath channel; interchannel interference (ICI); intersymbol interference (ISI); orthogonal frequency division multiplexing (OFDM);
Citations & Related Records

Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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