AbstractFarid-Hranilovic (FH),in an interesting way, found a capacity-achieving discrete input distribution for free space optical (FSO) channel by numerically maximizing the input-parameter (β) dependent mutual information between channel input...

Abstract—Farid-Hranilovic (FH) have investigated the capacity

of free space optical (FSO) channel, by considering the coherent

input-output mutual information and maximizing the source

entropy. In this paper, we derive a general...

In this paper, by using a simple mathematical inequality, we derive a new upper bound for the capacity

of free space optical channel in coherent case. Then, by applying general fading distribution, we obtain an

upper bound for mutual...