Differential space-time block code modulation for DS-CDMA systems
2002 (English)In: EURASIP Journal on Advances in Signal Processing, ISSN 1687-6172, no 3, 289-296 p.Article in journal (Refereed) Published
A differential space-time block code (DSTBC) modulation scheme is used to improve the performance of DS-CDMA systems in fast time-dispersive fading channels. The resulting scheme is referred to as the differential space-time block code modulation for DS-CDMA (DSTBC-CDMA) systems. The new modulation and demodulation schemes are especially studied for the down-link transmission of DS-CDMA systems. We present three demodulation schemes, referred to as the differential space-time block code Rake (D-Rake) receiver, differential space-time block code deterministic (D-Det) receiver, and differential space-time block code deterministic de-prefix (D-Det-DP) receiver, respectively. The D-Det receiver exploits the known information of the spreading sequences and their delayed paths deterministically besides the Rake type combination; consequently, it can outperform the D-Rake receiver, which employs the Rake type combination only. The D-Det-DP receiver avoids the effect of intersymbol interference and hence can offer better performance than the D-Det receiver.
Place, publisher, year, edition, pages
2002. no 3, 289-296 p.
wireless communications, space-time coding, smart antennas, spread spectrum, DS-CDMA, Rake receiver
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-77113DOI: 10.1155/S1110865702000598OAI: oai:DiVA.org:liu-77113DiVA: diva2:524884