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MC-CDMA with Quadrature Spreading for Wireless Communication Systems
KTH, Tidigare Institutioner, Signaler, sensorer och system.ORCID-id: 0000-0001-9697-9978
1998 (engelsk)Inngår i: European transactions on telecommunications, ISSN 1124-318X, E-ISSN 2161-3915, Vol. 9, nr 4, s. 371-378Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Multi­Carrier CDMA (MC­CDMA) systems using the Orthogonal Frequency  Division Division Multiple Access (OFDM) technique resolve the frequency se­  lectivity in multipath fading channels and have good spectral properties. The  addition of a spread spectrum component to the OFDM introduces a frequency  diversity gain that can combat deep multipath fading situations.  In this paper a MC­CDMA system operating over frequency selective, slowly  fading channels is considered and its performance is studied analytically and by  computer simulations. We consider the downlink of a cellular radio system where  for each user a BPSK modulation and a quadrature (complex) spreading code is  used. The spreading codes are arranged in a way that reduces the effect of the  multipath fading channel and restores some of the orthogonality losses between  users. The obtained results show considerable performance improvement compared  to conventional OFDM and to MC­CDMA that uses single spreading codes. The  effect of frequency offsets on the system performance is also addressed in this  paper.  Its superior performance and low complexity receiver make MC­CDMA with  quadrature spreading codes suitable for future wireless communication systems to  achieve the requirements of high quality services, high speed, and low cost­receiver.

sted, utgiver, år, opplag, sider
Milano: Assoc Elettrotecnica Ed Elettronica Italiana , 1998. Vol. 9, nr 4, s. 371-378
HSV kategori
Forskningsprogram
SRA - Informations- och kommunikationsteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-28133DOI: 10.1002/ett.4460090411ISI: 000075074200006OAI: oai:DiVA.org:kth-28133DiVA, id: diva2:383997
Merknad
QC 20110111Tilgjengelig fra: 2011-01-06 Laget: 2011-01-06 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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