Simulative Investigations on Log-Normal Turbulence Model for Free Space Optical Communication

Abstract

The log-normal probability-density function is based on the following paradigm for the optical field after propagation through atmospheric turbulence, a field with minimised coherence that follows Rice-Nakagami statistics is modulated by a multiplicative factors those obeys log-normal statistics. The bigger eddies in the turbulent medium produce the log-normal statistics and as well as the smaller ones produce the Gaussian statistics. By investigating this model all the parameters required by the density function could be calculated by means of physical parameters such as turbulence strength inner scale, and propagation configuration. The heuristic density function is reliable with available data at low and at high turbulence levels.