ETRI Journal

  • 제21권4호
  • /
  • Pages.29-40
  • /
  • 1999
  • /
  • 1225-6463(pISSN)
  • /
  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
권호 표지

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)
  • 투고 : 1999.07.28
  • 발행 : 1999.12.31
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초록

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.

키워드

참고문헌

  1. IEEE Trans. Commun. v.44 no.February On the Performance of Multicarrier DS CDMA Systems Kondo, S.;Milstein, L.B.
  2. Convolutional and Turbo Coded Multicarrier Direct Sequence CDMA, and Applications of Turbo Codes to Hybrid ARQ Communication Systems Rowitch, D.N.
  3. Proc. VTC '96 Effect of Correlation Between Subcarriers of an MCM/DSSS Communication System Ziemer, R.E.;Nadgauda, N.
  4. IEEE Trans. Commun. v.44 no.March Performance of Orthogonal Multi-Carrier CDMA in a Multipath Fading Channel Sourour, E.;Nakagawa, M.
  5. Proc. 4th PIMRC '93 Multi-Carrier CDMA in Indoor Wireless Radio Network Yee, N.;Linnartz, J.P.;Fettweis, G.
  6. Proc. 4th PIMRC '93 On the Performance of Convolutionally-Coded CDMA/OFDM for Mobile Communication System Fazel, K.;Papke, L.
  7. Proc. GLOBECOM '93 Orthogonal Multicarrier Technique applied to Direct Sequence Spread Spectrum CDMA Systems Chouly, A.;Barajal, A.;Jourdan, S.
  8. IEEE Trans. Veh. Technol v.44 no.May Multitone Sread Spectrum Multiple Access Communications System in Multipath Rician Fading Channel Vandendorpe, L.
  9. Proc. of VTC '97 Performance of Multicarrier DS CDMA Systems in the Presence of Correlated Fading Xu, W.;Milstein, L.B.
  10. Offset Multicarrier DS/CDMA System Han, J.H.;Milstein, L.B.;Kim, S.W.
  11. Mobile Communications Engineering:Theory and Applications Lee, W.C.Y.
  12. Digital Communication Proakis, J.
  13. CRC Standard Mathematical Tables Beyer, W.H.
  14. IEEE Trans. Commun. v.19 no.October Convolutional Codes and Their Performance in Communication Systems Viterbi, A.J.