OOK Performance for Terrestrial FSO Links in Turbulent Atmosphere with Pointing Errors Modeled by Hoyt Distributions

Terrestrial free-space optical links are corrupted by both turbulence and misalignment losses. It is common practice to model turbulence by a gamma-gamma distribution and misalignments by a Rayleigh distribution, where the underlying assumption is that the jitter in vertical and horizontal directions is the same. In the current letter, we generalize this previous approach by modeling misalignments with a Hoyt distribution, which removes the assumption of an identical jitter variance along the horizontal and vertical axes.