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Study of OFDMA multiple access in a multicellular context
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
2005 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Orthogonal Frequency Division Multiple nAccess (OFDMA) is a multiple access technique that is starting to be examined as an alternative to Code DivisionMultiple Access (CDMA) for third generation cellular mobile systems.  Until recently, OFDMA had received little attention for multicellular applications and as a consequence of this, few results are available on the impact of interference on OFDMA communications. In this thesis, we study the behaviour of an OFDMA system with respect to theinter-cell interference.  We show that due to the heterogeneous nature of the interference, interference estimation combined with soft-input channel decoders can be used to improve the performance of the system.  We evaluate the performance gains obtained for different interference estimation techniques and show by means of realistic simulations that a low complexity algorithm can be used to achieve gains of up to 2dB.

Place, publisher, year, edition, pages
2005. , 43 p.
National Category
Computer and Information Science
URN: urn:nbn:se:kth:diva-27826OAI: diva2:382618
Available from: 2011-03-09 Created: 2011-01-03 Last updated: 2015-01-09Bibliographically approved

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