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dc.contributor.authorDulek, B.en_US
dc.contributor.authorTutay, M. E.en_US
dc.contributor.authorGezici, S.en_US
dc.contributor.authorVarshney, P. K.en_US
dc.date.accessioned2016-02-08T10:58:06Z
dc.date.available2016-02-08T10:58:06Z
dc.date.issued2014-03en_US
dc.identifier.issn1051-2004
dc.identifier.urihttp://hdl.handle.net/11693/26313
dc.description.abstractAn M-ary communication system is considered in which the transmitter and the receiver are connected via multiple additive (possibly non-Gaussian) noise channels, any one of which can be utilized for the transmission of a given symbol. Contrary to deterministic signaling (i.e., employing a fixed constellation), a stochastic signaling approach is adopted by treating the signal values transmitted for each information symbol over each channel as random variables. In particular, the joint optimization of the channel switching (i.e., time sharing among different channels) strategy, stochastic signals, and decision rules at the receiver is performed in order to minimize the average probability of error under an average transmit power constraint. It is proved that the solution to this problem involves either one of the following: (i) deterministic signaling over a single channel, (ii) randomizing (time sharing) between two different signal constellations over a single channel, or (iii) switching (time sharing) between two channels with deterministic signaling over each channel. For all cases, the optimal strategies are shown to employ corresponding maximum a posteriori probability (MAP) decision rules at the receiver. In addition, sufficient conditions are derived in order to specify whether the proposed strategy can or cannot improve the error performance over the conventional approach, in which a single channel is employed with deterministic signaling at the average power limit. Finally, numerical examples are presented to illustrate the theoretical results. © 2013 Elsevier Inc.en_US
dc.language.isoEnglishen_US
dc.source.titleDigital Signal Processingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.dsp.2013.10.012en_US
dc.subjectChannel switchingen_US
dc.subjectDetectionen_US
dc.subjectError probabilityen_US
dc.subjectM-ary communicationsen_US
dc.subjectNon-Gaussianen_US
dc.subjectStochastic signalingen_US
dc.titleOptimal signaling and detector design for M-ary communication systems in the presence of multiple additive noise channelsen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineering
dc.citation.spage153en_US
dc.citation.epage168en_US
dc.citation.volumeNumber26en_US
dc.identifier.doi10.1016/j.dsp.2013.10.012en_US
dc.publisherAcademic Pressen_US


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