Optimum power randomization for the minimization of outage probability

buir.contributor.authorGezici, Sinan
dc.citation.epage4637en_US
dc.citation.issueNumber9en_US
dc.citation.spage4627en_US
dc.citation.volumeNumber12en_US
dc.contributor.authorDulek, B.en_US
dc.contributor.authorVanli, N. D.en_US
dc.contributor.authorGezici, Sinanen_US
dc.contributor.authorVarshney P. K.en_US
dc.date.accessioned2016-02-08T12:07:39Z
dc.date.available2016-02-08T12:07:39Z
dc.date.issued2013en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractThe optimum power randomization problem is studied to minimize outage probability in flat block-fading Gaussian channels under an average transmit power constraint and in the presence of channel distribution information at the transmitter. When the probability density function of the channel power gain is continuously differentiable with a finite second moment, it is shown that the outage probability curve is a nonincreasing function of the normalized transmit power with at least one inflection point and the total number of inflection points is odd. Based on this result, it is proved that the optimum power transmission strategy involves randomization between at most two power levels. In the case of a single inflection point, the optimum strategy simplifies to on-off signaling for weak transmitters. Through analytical and numerical discussions, it is shown that the proposed framework can be adapted to a wide variety of scenarios including log-normal shadowing, diversity combining over Rayleigh fading channels, Nakagami-m fading, spectrum sharing, and jamming applications. We also show that power randomization does not necessarily improve the outage performance when the finite second moment assumption is violated by the power distribution of the fading. © 2013 IEEE.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T12:07:39Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2013en
dc.identifier.doi10.1109/TWC.2013.072513.121945en_US
dc.identifier.issn1536-1276
dc.identifier.urihttp://hdl.handle.net/11693/27987
dc.language.isoEnglishen_US
dc.publisherIEEEen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/TWC.2013.072513.121945en_US
dc.source.titleIEEE Transactions on Wireless Communicationsen_US
dc.subjectPower randomizationen_US
dc.subjectChannel distribution information at the transmittersen_US
dc.subjectContinuously differentiableen_US
dc.subjectOutage probabilityen_US
dc.subjectPower randomizationen_US
dc.subjectRandomization problemsen_US
dc.subjectTransmission strategiesen_US
dc.subjectWireless communicationsen_US
dc.subjectJammingen_US
dc.subjectProbability density functionen_US
dc.subjectRandom processesen_US
dc.subjectRayleigh fadingen_US
dc.subjectTelecommunicationen_US
dc.subjectWireless telecommunication systemsen_US
dc.subjectOutagesen_US
dc.titleOptimum power randomization for the minimization of outage probabilityen_US
dc.typeArticleen_US

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