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dc.contributor.authorGoken, C.en_US
dc.contributor.authorGezici, S.en_US
dc.contributor.authorArikan, O.en_US
dc.date.accessioned2016-02-08T09:40:25Z
dc.date.available2016-02-08T09:40:25Z
dc.date.issued2013en_US
dc.identifier.issn1051-2004
dc.identifier.urihttp://hdl.handle.net/11693/21060
dc.description.abstractIn this paper, stochastic signaling is studied for power-constrained scalar valued binary communications systems in the presence of uncertainties in channel state information (CSI). First, stochastic signaling based on the available imperfect channel coefficient at the transmitter is analyzed, and it is shown that optimal signals can be represented by a randomization between at most two distinct signal levels for each symbol. Then, performance of stochastic signaling and conventional deterministic signaling is compared for this scenario, and sufficient conditions are derived for improvability and nonimprovability of deterministic signaling via stochastic signaling in the presence of CSI uncertainty. Furthermore, under CSI uncertainty, two different stochastic signaling strategies, namely, robust stochastic signaling and stochastic signaling with averaging, are proposed. For the robust stochastic signaling problem, sufficient conditions are derived for reducing the problem to a simpler form. It is shown that the optimal signal for each symbol can be expressed as a randomization between at most two distinct signal values for stochastic signaling with averaging, as well as for robust stochastic signaling under certain conditions. Finally, two numerical examples are presented to explore the theoretical results.en_US
dc.language.isoEnglishen_US
dc.source.titleDigital Signal Processing: A Review Journalen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.dsp.2012.10.004en_US
dc.subjectChannel state informationen_US
dc.subjectMinimaxen_US
dc.subjectProbability of erroren_US
dc.subjectStochastic signalingen_US
dc.subjectChannel coefficienten_US
dc.subjectCommunications systemsen_US
dc.subjectIn-channelsen_US
dc.subjectMinimaxen_US
dc.subjectNumerical exampleen_US
dc.subjectOptimal signalsen_US
dc.subjectProbability of errorsen_US
dc.subjectSignal levelen_US
dc.subjectSignal valueen_US
dc.subjectSufficient conditionsen_US
dc.subjectTheoretical resulten_US
dc.subjectChannel state informationen_US
dc.subjectFading channelsen_US
dc.subjectOptimizationen_US
dc.subjectRandom processesen_US
dc.subjectStochastic systemsen_US
dc.subjectSignalingen_US
dc.titleStochastic signaling in the presence of channel state information uncertaintyen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage635en_US
dc.citation.epage645en_US
dc.citation.volumeNumber23en_US
dc.citation.issueNumber2en_US
dc.identifier.doi10.1016/j.dsp.2012.10.004en_US
dc.publisherElsevieren_US


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