Performance Analysis of Partially Coherent Beam Wireless Optical Communication System in a Turbulent Atmosphere Channel

As communication carrier in Gamma-Gamma atmospheric turbulence, the average bit error rate, outage probability and average channel capacity of the wireless optical communication system with partially coherent beam are analyzed in this paper. The performance parameters of optical communication system in the atmospheric channel are analyzed by the analytic expression of the coherent parameters of partially coherent beams. Numerical simulation shows that the atmospheric communication is carried out by partially coherent light under the same conditions of atmospheric turbulence and transmission distance. With the decrease of the spatial coherence length of partially coherent light, the bit error rate (BER) and outage probability of the system are gradually reduced, at the same time, the average channel capacity of the system increases with the decrease of the coherence length of the beam.