OPTICAL COMMUNICATION THROUGH MULTIPLE-SCATTERING MEDIA
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
Pagination or Media Count:
A model is developed for the effects of multiple scattering upon optical-frequency radiation. Attention is focused upon situations in which the scattering particles are large compared to the carrier wavelength, so that forward-scattering predominates. This is the case for atmospheric clouds at visible-light wavelengths, the physical framework within which the analysis is carried out. The objectives served by the model are those of a communications engineer desiring to design a system for optical communication through clouds. The spatial variation of the intensity of light beneath a cloud subjected to continuous-wave illumination is modeled as the output of a multidimensional linear system. The approximate impulse response of the system is determined, in two complementary forms, and the approximate response below the cloud under arbitrary illumination is shown to be given by a linear superposition integral. In general, the spatial behavior is representable as a joint function of angle of arrival and horizontal coordinates over the ground.
- Non-Radio Communications