Using the Lorentz distribution to model fade slope at free space optical communication systems

In this work, results of the statistical estimation of the probability density function of fade slope in a 0.83μm free space optical communication system, operating across densely urbanised terrain, are presented and discussed. This system was installed linking the Engineering Buildings of University College and Imperial College, London and stayed in operation for 4 years. The statistical analysis of fade slope can provide insight into the dynamics of the fading phenomena as it represents the speed with which the attenuation grows and declines.