Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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BER Performance of OFDM Combined with TDM Using Frequency-Domain Equalization

  • Gacanin, Haris (Department of Electrical and Communication Engineering, Tohoku University) ;
  • Takaoka, Shinsuke (Next-Generation Mobile Communications Development Center Matsushita Electric Industrial Co., Ltd.) ;
  • Adachi, Fumiyuki (Department of Electrical and Communication Engineering, Tohoku University)
  • Published : 2007.03.31
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Abstract

Orthogonal frequency division multiplexing (OFDM) combined with time division multiplexing (TDM), in this paper called OFDM/TDM, can overcome the high peak-to-average-power ratio (PAPR) problem of the conventional OFDM and improve the robustness against long time delays. In this paper, the bit error rate (BER) performance of OFDM/FDM in a frequency-selective Rayleigh fading. channel is evaluated by computer simulation. It is shown that the use of frequency-domain equalization based on minimum mean square error criterion (MMSE-FDE) can significantly improve the BER performance, compared to the conventional OFDM, by exploiting the channel frequency-selectivity while reducing the PAPR or improving the robustness against long time delays. It is also shown that the performance of OFDM/FDM designed to reduce the PAPR can bridge the conventional OFDM and single-carrier (SC) transmission by changing the design parameter.

Keywords

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