MC-CDMA with Quadrature Spreading over Frequency Selective Fading Channels
1997 (English)In: Conference Record / IEEE Global Telecommunications Conference, New York: IEEE , 1997, 315-319 p.Conference paper (Refereed)
MultiCarrier CDMA (MCCDMA) schemes resolve the frequency selectivity in multipath fading channels and have good spectral properties. Spreading the information over many subcarriers adds flexibility to the system and a redundancy between subcarriers that can be combined nicely with the derived frequency diversity out from the fading channel. In this paper the performance of a MCCDMA scheme over frequency selective, slowly fading channels is studied analytically and by computer simulations. The MCCDMA system uses a BPSK modulation, quadrature (complex) spreading codes, and a simple correlator receiver. Quadrature spread ing codes are used to reduce the effect of the multipath fading channel and restore some of the orthogonality losses be tween users. The obtained results show considerable performance improvement compared to conventional Orthogonal Frequency Division Multiplexing (OFDM) scheme and MCCDMA schemes that use nonquadrature spreading. The effect of frequency offsets on the system performance is also addressed in this paper.
Place, publisher, year, edition, pages
New York: IEEE , 1997. 315-319 p.
Computer and Information Science
Research subject SRA - ICT
IdentifiersURN: urn:nbn:se:kth:diva-28165DOI: 10.1109/GLOCOM.1997.632561ISBN: 0-7803-4198-8OAI: oai:DiVA.org:kth-28165DiVA: diva2:384206
The 1997 IEEE Global Telecommunications Mini-Conference; Phoenix, AZ, USA; 3 November 1997 through 8 November 1997
QC 201101142011-01-072011-01-072011-11-29Bibliographically approved