Article Code : 139307281030442752(DOI : 10.7508/jist.2013.01.001)

Article Title : A New Upper Bound for Free Space Optical Channel Capacity Using a Simple Mathematical in Equality

Journal Number : 1 Winter 2013

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List of Authors

  Full Name Email Grade Degree Corresponding Author
1 Arezu Rezazadeh - M.Sc
2 Ghosheh Abed Hodtani Assistant Professor PhD


In this paper, by using a simple mathematical inequality, we derive a $ new upper bound fkr the capacity of$ free space optical channel in coherent case. Then, by applying general fading distribution, we obtain an upper bound for mutual information in non-coherent case. Finally, we derive the corresponding optimal input distributions for both coherent and non-coherent cases, compare the results with previous works numerically and illustrate that our results subsume some of previous results in special cases.