Abstract
In this paper, we present investigations of non-line-of-sight (NLOS) communication carried out in Russia and in collaboration with researchers in Israel. The theories of radiative transfer and linear systems provide the theoretical basis for this joint research, and experimental results demonstrate that maximal ranges for NLOS communication through atmospheric channels can reach hundreds of kilometers in the visible range and tens of kilometers in the ultraviolet (UV) range of the spectrum. Finally, we predict the range of bistatic underwater communication systems can reach hundreds of meters.
Highlights
The exact date when optical ranging was first used for high-speed messaging is, unknown, but it can be assumed that it began many centuries ago when signal smoke, torches, etc.were used for communication over long distances
Were used for communication over long distances. This type of communication continues to be used for messaging using the Morse alphabet and searchlights equipped with light shutters. These technologies of optical communication have long been replaced by new methods based on laser radiation and optical fiber for secure communication channels
These have culminated in the development of the global Internet. These new technologies prompt the question of whether there is any merit in the development of atmospheric and underwater optical communication systems with open communication channels? Radio communication through the atmosphere has a long history, it operates in all weather, and is available practically everywhere, whereas through water media, acoustic communication systems with open channels are widely used
Summary
The exact date when optical ranging was first used for high-speed messaging is, unknown, but it can be assumed that it began many centuries ago when signal smoke, torches, etc. This type of communication continues to be used for messaging using the Morse alphabet and searchlights equipped with light shutters These technologies of optical communication have long been replaced by new methods based on laser radiation and optical fiber for secure communication channels. Of scattered or reflected optical radiation areoften considered These OECS are or called non-line-of-sight (NLOS)see systems, and in Russia they are moreon often called over-the-horizon bistatic systems Characteristics and blocks “Signal modulator”, “Laser”, and “Optics” are related to the source of radiation.of these blocks comprise real optical-electronic bistatic system. We should note that we do not highlight the ice, because ice has both reflection and scattering scattering properties of optical radiation Its particular predictions predictions regarding the feasibilitythe of afeasibility specific OECS andOECS its particular characteristics
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