Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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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)
  • Published : 2006.09.01
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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

References

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