Göken, ÇağrıGezici, SinanArıkan, Orhan2016-02-082016-02-082011http://hdl.handle.net/11693/28283Date of Conference: 5-9 Dec. 2011In 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, it is shown that, for a given decision rule at the receiver, stochastic signaling based on the available CSI at the transmitter results in a randomization between at most two different signal levels for each symbol. Then, the performance of stochastic signaling and conventional deterministic signaling is compared, and sufficient conditions are derived for improvability and nonimprovability of deterministic signaling via stochastic signaling in the presence of CSI uncertainty. Finally a numerical example is presented to explore the theoretical results. © 2011 IEEE.EnglishProbability of errorCommunications systemsDecision rulesIn-channelsNumerical exampleProbability of errorSignal levelSufficient conditionsTheoretical resultChannel state informationSignal receiversStochastic systemsSignalingConference Paper10.1109/GLOCOM.2011.6133732