Performance of asynchronous multicarrier CDMA multiuser receiver over frequency selective fading channels

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  2. Rui Liu
  3. Dr Graeme Chester
  4. Professor Bayan Sharif
  5. Yi Yi
Author(s)Sharif BS; Chester EG; Yi SJ; Liu R
Publication type Conference Proceedings (inc. Abstract)
Conference Name14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications
Conference LocationBeijing, China
Year of Conference2003
Source Publication Date7-10 September 2003
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An asynchronous multicarrier code division multiple access (MC-CDMA) scheme over frequency selective multipath Rayleigh fading channels for the reverse link of a mobile communication system is investigated when the delay spread is in excess of a symbol interval. An architecture of a centralized decision feedback equalizer (CDFE) based on the minimum mean-square-error (MMSE) criterion is suggested to reduce both inter-symbol-interference (ISI) and multiple access interference (MAI) due to the multi-path propagation, and the MAI due to the effect of the reverse asynchronous reception mode at the base station. The receiver architecture is for multi-user detection (MUD) consisting of a multiple-layer feed-forward filter (ML-FFF) and a centralized feed back filter (CFBF). Results indicate that an enhancement in capacity and good interference resistance are obtained by the proposed multi-user detection scheme over the structure without CFBF (NCDFE), which only uses ML-FFF and FBF. Additionally, it is demonstrated that the structure performs multi-path energy Rake combining. (6 References).
NotesKe G NiuZ 2. Piscataway, NJ, USA. 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications. Proceedings. Beijing, China. IEEE Commun. Soc. 7-10 Sept. 2003.
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