Stochastic signaling in the presence of channel state information uncertainty
Author
Goken, C.
Gezici, Sinan
Arıkan, Orhan
Date
2013Source Title
Digital Signal Processing: A Review Journal
Print ISSN
1051-2004
Publisher
Elsevier
Volume
23
Issue
2
Pages
635 - 645
Language
English
Type
ArticleItem Usage Stats
148
views
views
93
downloads
downloads
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, 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.
Keywords
Channel state informationMinimax
Probability of error
Stochastic signaling
Channel coefficient
Communications systems
In-channels
Minimax
Numerical example
Optimal signals
Probability of errors
Signal level
Signal value
Sufficient conditions
Theoretical result
Channel state information
Fading channels
Optimization
Random processes
Stochastic systems
Signaling
Permalink
http://hdl.handle.net/11693/21060Published Version (Please cite this version)
http://dx.doi.org/10.1016/j.dsp.2012.10.004Collections
Related items
Showing items related by title, author, creator and subject.
-
Çokyollu kanal parametre kestirimi için yeni bir dizilim sinyal işleme tekniği
Güldoǧan, Mehmet Burak; Arıkan, Orhan (IEEE, 2007-06)Bu bildiride, çarpraz belirsizlik işlevinin kullanıldığı yeni bir dizilim sinyal işleme tekniği önerilmektedir. Geliştirilen teknik bir algılayıcı dizilimine gelen sinyallerden herbirinin geliş yönünü (GY), zaman gecikmesini ... -
On the reliability exponent of the exponential timing channel
Arikan, E. (IEEE, 2002)We determine the reliability exponent E(R) of the Anantharam-Verdú exponential server timing channel with service rate μ for all rates R between a critical rate R c = (μ/4) log 2 and the channel capacity C = e -1μ. For ... -
Comparison of the CAF-DF and sage algorithms in multipath channel parameter estimation
Güldoğan, M. Burak; Arıkan, Orhan (IEEE, 2008-07)In this paper, performance of the recently proposed Cross Ambiguity Function - Direction Finding (CAF-DF) technique is compared with the Space Alternating Generalized Expectation Maximization (SAGE) technique. The CAF-DF, ...