A New Upper Bound for Free Space Optical Channel Capacity Using a Simple Mathematical in Equality
Journal Title: Journal of Information Systems and Telecommunication - Year 2013, Vol 1, Issue 1
Abstract
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.
Authors and Affiliations
Arezu Rezazadeh, Ghosheh Abed Hodtani
Assessment of Performance Improvement in Hyperspectral Image Classification Based on Adaptive Expansion of Training Samples
High dimensional images in remote sensing applications allow us to analysis the surface of the earth with more details. A relevant problem for supervised classification of hyperspectral image is the limited availability...
A new Sparse Coding Approach for Human Face and Action Recognition
Sparse coding is an unsupervised method which learns a set of over-complete bases to represent data such as image, video and etc. In the cases where we have some similar images from the different classes, using the spars...
Language Model Adaptation Using Dirichlet Class Language Model Based on Part-of-Speech
Language modeling has many applications in a large variety of domains. Performance of this model depends on its adaptation to a particular style of data. Accordingly, adaptation methods endeavour to apply syntactic and s...
A New Robust Digital Image Watermarking Algorithm Based on LWT-SVD and Fractal Images
This paper presents a robust copyright protection scheme based on Lifting Wavelet Transform (LWT) and Singular Value Decomposition (SVD). We have used fractal decoding to make a very compact representation of watermark i...
Crisis management using spatial query processing in wireless sensor networks
Natural disasters are an inevitable part of the world that we inhabit. Human casualties and financial losses are concomitants of these natural disasters. However, by an efficient crisis management program, we can minimiz...