Name
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. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1016/j.dsp.2012.10.004 | Digital Signal Processing |
Keywords | Field | DocType |
sufficient condition,available imperfect channel coefficient,robust stochastic,channel state information,conventional deterministic,optimal signal,different stochastic,distinct signal value,distinct signal level,csi uncertainty,channel state information uncertainty,minimax,probability of error | Transmitter,Mathematical optimization,Minimax,Stochastic optimization,Control theory,Scalar (physics),Communication channel,Communications system,Stochastic process,Mathematics,Channel state information | Journal |
Volume | Issue | ISSN |
23 | 2 | 1051-2004 |
Citations | PageRank | References |
1 | 0.35 | 20 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Cagri Goken | 1 | 26 | 5.90 |
| Sinan Gezici | 2 | 682 | 66.18 |
| Orhan Arikan | 3 | 180 | 39.45 |