Open AccessDEVELOPMENT OF PROPOSALS FOR SELECTING AN ENSEMBLE OF BROADBAND SIGNALS SATELLITE COMMUNICATION SYSTEMS WITH MULTI-STATION ACCESS AND CODE DIVISION OF CHANNALS
Author(s) -
В. И. Филатов,
Vitaly A. Julego,
Valery U. Balakirev,
Sergey S. Ushakov
Publication year - 2021
Publication title -
t-comm
Language(s) - English
Resource type - Journals
eISSN - 2072-8743
pISSN - 2072-8735
DOI - 10.36724/2072-8735-2021-15-4-13-20
Subject(s) - repeater (horology) , computer science , retransmission , communications satellite , satellite , remote sensing , telecommunications , electronic engineering , engineering , geography , transmission (telecommunications) , artificial intelligence , encoding (memory) , aerospace engineering
When designing satellite communication lines and calculating service areas, any unfavorable combinations of signal propagation conditions are taken into account, which, during operation of the repeater, leads to a significant underestimation of the calculated signal level in comparison with the actually provided one. Under these conditions, control of the compliance of the declared characteristics with the real level of the power flux density created by the satellite repeater at the earth’s surface in order to ensure electromagnetic compatibility is the most priority task. When conducting radio monitoring of satellite communication lines using active diagnostic methods, it is necessary to rationally determine the parameters of diagnostic signals so that they meet the conflicting requirements for their confident reception after being relayed by a satellite without disrupting (reducing the capacity) of the functioning of satellite communication lines. Mathematical modeling of the retransmission path of diagnostic signals in the multi-station repeater mode, taking into account the relative spatial location of the satellite, the service area and the radio monitoring station, has been carried out. The model takes into account most of the known factors and features of the propagation of radio signals in satellite communication lines in relation to various statistical phenomena in the atmosphere (refraction, signal depolarization), as well as the instability of the position of the satellite in orbit and the associated variability of the boundaries of the coverage area. As a result of the simulation, it was concluded that under conditions of a priori uncertainty about the polarization parameters used on board the monitored satellite of the antennas, there is a fundamental possibility of active diagnostics of the repeater shafts without weakening the diagnostic signal due to polarization mismatch.