ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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The Performance Improvement of a Multicarrier DS-CDMA System Using both Time-Diversity and Frequency Offset

  • Kim, Ki-Doo (Department of Electronics Engineering, Kookmin University) ;
  • Oh, Jung-Hun (Kookmin University) ;
  • Milstein, Laurence B. (Department of Electrical and Computer Engineering, University of California)
  • Received : 1999.07.28
  • Published : 1999.12.31
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Abstract

In this paper, we show the robustness of a proposed system using both a frequency diversity and a time diversity effect when the channel assumptions are relaxed such that all sub-bands are not independent fading. We take time-repetition coding with interleaving such that the repetition code symbols are spaced sufficiently far apart to guarantee time diversity. We also incorporate offset multicarriers into a proposed multicarrier DS-CDMA system in a different way compared to that of [10] to reduce the total multiple access interference. When we take a convolutional encoder instead of a time-repetition encoder, and again use both time diversity and frequency offset, then we can obtain the significant performance gain.

Keywords

References

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