Title :
Lower bounds on the capacity of discrete-time Poisson channels with dark current
Author :
Cao, Jihai ; Hranilovic, Steve ; Chen, Jun
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, ON, Canada
Abstract :
Currently, no closed form for the capacity of discrete-time Poisson channels is known. In this paper, improved lower bounds on the capacity of discrete-time Poisson channels with dark current and average power constraint are obtained by using the family of gamma input distributions. The intuition of the method used in this work comes from Martinez and the new bounds are tighter than the previous lower bounds, especially at low transmit power levels.
Keywords :
optical communication; stochastic processes; average power constraint; dark current; discrete-time Poisson channels; gamma input distributions; improved lower bounds; Channel capacity; Dark current; Integral equations; Intensity modulation; Optical fiber communication; Optical modulation; Optical receivers; Optical transmitters; Power system modeling; Upper bound;
Conference_Titel :
Communications (QBSC), 2010 25th Biennial Symposium on
Conference_Location :
Kingston, ON
Print_ISBN :
978-1-4244-5709-0
DOI :
10.1109/BSC.2010.5472956
