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Trellis-coded-modulation-OFDMA for spectrum sharing in cognitive environment

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Publication date2012
Host publicationComputers and Communications (ISCC), 2012 IEEE Symposium on
Place of PublicationNew York
PublisherIEEE
Pages790-794
Number of pages5
ISBN (Electronic)9781467327114
ISBN (Print)9781467327121
Original languageEnglish
Event17th IEEE Symposium on Computers and Communications (lSCC) - , Turkey
Duration: 1/07/20124/07/2012

Conference

Conference17th IEEE Symposium on Computers and Communications (lSCC)
CountryTurkey
Period1/07/124/07/12

Conference

Conference17th IEEE Symposium on Computers and Communications (lSCC)
CountryTurkey
Period1/07/124/07/12

Abstract

In this paper, we consider an underlay spectrum sharing system and propose utilizing discrete rate Trellis Coded Modulation Orthogonal Frequency Division Multiple Access (TCM-OFDMA) technique in the secondary system. Downlink radio resource allocation schemes are then proposed for such system. Simulation results indicate that using the proposed scheme, we can significantly increase the sum rate compared to conventional uncoded OFDMA schemes with only a moderate increase in system complexity. It is also shown that in cases where the secondary network is unable to achieve higher rates by increasing the total power and/or interference threshold, utilizing TCM-OFDMA acts as a smart alternative.