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MC-CDMA with Quadrature Spreading over Frequency Selective Fading Channels
KTH, Tidigare Institutioner, Signaler, sensorer och system.ORCID-id: 0000-0001-9697-9978
1997 (engelsk)Inngår i: Conference Record / IEEE Global Telecommunications Conference, New York: IEEE , 1997, s. 315-319Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

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.

sted, utgiver, år, opplag, sider
New York: IEEE , 1997. s. 315-319
HSV kategori
Forskningsprogram
SRA - Informations- och kommunikationsteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-28165DOI: 10.1109/GLOCOM.1997.632561ISBN: 0-7803-4198-8 (tryckt)OAI: oai:DiVA.org:kth-28165DiVA, id: diva2:384206
Konferanse
The 1997 IEEE Global Telecommunications Mini-Conference; Phoenix, AZ, USA; 3 November 1997 through 8 November 1997
Merknad
QC 20110114Tilgjengelig fra: 2011-01-07 Laget: 2011-01-07 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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Totalt: 68 treff
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Utmatningsformat
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