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The Poisson Channel With Varying Dark Current Known to the Transmitter.
- Source :
-
IEEE Transactions on Information Theory . Aug2019, Vol. 65 Issue 8, p4966-4978. 13p. - Publication Year :
- 2019
-
Abstract
- This paper studies the continuous-time Poisson channel whose dark current is random and may change for every $\tau $ -second time interval, where the actual values of the dark current are known to the transmitter as channel-state information (CSI). In the limit where $\tau $ tends to zero, the capacity gain provided by both causal and noncausal CSI is shown to vanish linearly with $\tau $ , so CSI at the transmitter provides almost no capacity improvement. The paper also considers a related problem of the state-dependent very noisy channel. In the very noisy limit, the capacity gain provided by noncausal CSI is shown to be the same as that provided by causal CSI. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TRANSMITTERS (Communication)
*RADIO transmitter fading
*AVALANCHE photodiodes
Subjects
Details
- Language :
- English
- ISSN :
- 00189448
- Volume :
- 65
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Information Theory
- Publication Type :
- Academic Journal
- Accession number :
- 137645895
- Full Text :
- https://doi.org/10.1109/TIT.2019.2911474