Interference and Deployment Issues for Cognitive Radio Systems in Shadowing Environments

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dc.contributor.authorHanif, M.F.
dc.contributor.authorShafi, M.
dc.contributor.authorSmith, P.J.
dc.contributor.authorDmochowski, P.
dc.date.accessioned2010-01-12T22:01:00Z
dc.date.available2010-01-12T22:01:00Z
dc.date.issued2009en
dc.description.abstractn this paper we describe a model for calculating the aggregate interference encountered by primary receivers in the presence of randomly placed cognitive radios (CRs). We show that incorporating the impact of distance attenuation and lognormal fading on each constituent interferer in the aggregate, leads to a composite interference that cannot be satisfactorily modeled by a lognormal. Using the interference statistics we determine a number of key parameters needed for the deployment of CRs. Examples of these are the exclusion zone radius, needed to protect the primary receiver under different types of fading environments and acceptable interference levels, and the numbers of CRs that can be deployed. We further show that if the CRs have apriori knowledge of the radio environment map (REM), then a much larger number of CRs can be deployed especially in a high density environment. Given REM information, we also look at the CR numbers achieved by two different types of techniques to process the scheduling information.en
dc.identifier.citationHanif, M.F., Shafi, M., Smith, P.J., Dmochowski, P. (2009) Interference and Deployment Issues for Cognitive Radio Systems in Shadowing Environments. Dresden, Germany: IEEE International Conference on Communication (ICC) 2009, 14-18 Jun 2009.en
dc.identifier.urihttp://hdl.handle.net/10092/3359
dc.language.isoen
dc.publisherUniversity of Canterbury. Electrical and Computer Engineeringen
dc.publisherUniversity of Canterbury. Mathematics and Statisticsen
dc.rights©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en
dc.rights.urihttps://hdl.handle.net/10092/17651en
dc.subject.marsdenFields of Research::290000 Engineering and Technology::291700 Communications Technologies::291710 Radio communications and broadcasting not elsewhere classifieden
dc.titleInterference and Deployment Issues for Cognitive Radio Systems in Shadowing Environmentsen
dc.typeConference Contributions - Published
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