Effects of channel state information uncertainty on the performance of stochastic signaling
Author
Göken, Çağrı
Gezici, Sinan
Arıkan, Orhan
Date
2011Source Title
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011
Publisher
IEEE
Language
English
Type
Conference PaperItem Usage Stats
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Abstract
In 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.
Keywords
Probability of errorCommunications systems
Decision rules
In-channels
Numerical example
Probability of error
Signal level
Sufficient conditions
Theoretical result
Channel state information
Signal receivers
Stochastic systems
Signaling