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MC-CDMA with Quadrature Spreading for Wireless Communication Systems
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0001-9697-9978
1998 (English)In: European transactions on telecommunications, ISSN 1124-318X, E-ISSN 2161-3915, Vol. 9, no 4, 371-378 p.Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
Milano: Assoc Elettrotecnica Ed Elettronica Italiana , 1998. Vol. 9, no 4, 371-378 p.
National Category
Computer and Information Science
Research subject
SRA - ICT
Identifiers
URN: urn:nbn:se:kth:diva-28133DOI: 10.1002/ett.4460090411ISI: 000075074200006OAI: oai:DiVA.org:kth-28133DiVA: diva2:383997
Note
QC 20110111Available from: 2011-01-06 Created: 2011-01-06 Last updated: 2017-12-11Bibliographically approved

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CiteExportLink to record
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  • apa
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