Temporal statistics of the beam-wander contribution to scintillation in ground-to-satellite optical links: an analytical approach.
The beam-wander contribution to the scintillation in a ground-to-satellite free-space optical link is one of major importance. An analytical model, based on the duality between beam wander and angle-of-arrival fluctuations, is proposed for the temporal statistics. The expression of the probability density function of the log-amplitude fluctuations is first obtained. Then, the expressions of the spatial and temporal autocovariances are also obtained. We present plots of the beam-wander contribution to the log-amplitude variance, as a function of the transmitter aperture size and the turbulence accumulated in the propagation path. We also present the angular fluctuation and log-amplitude scintillation spectrum plots for some selected cases.
Rodriguez-Gomez
Alejandro
A
Department of Signal Theory and Communications, Universitat Politècnica de Catalunya, Barcelona, Spain. alejandro@tsc.upc.edu
Dios
Federico
F
Rubio
Juan Antonio
JA
Comeron
Adolfo
A