COMMUNICATION RELAY STATION Russian patent published in 1997 - IPC

FIELD: radio engineering, applicable in satellite communication systems functioning in noise conditions. SUBSTANCE: communication relay station provides for an enhanced noise immunity of information exchange between ground stations with semi-directional antennas in the conditions of action of noise sources with narrow- directional antennas. The communication relay station uses N≥2 auxiliary units BY((ВУ₁,...,ВУ_N)) located on N auxiliary artificial earth satellites distributed around the main unit of the communication relay station on the main artificial satellite within the space limited by the major lobes of the directional patterns of the ground station antennas. The main unit uses N auxiliary series-connected receiving antenna devices 1, radio- frequency receiving sections 2 and frequency converters 3, as well as series-connected radio-frequency switch 4, mixer 5, processing section 6, transmission section 7, transmitting antenna device 8, and stepwise variable frequency generator 9, frequency divider 10 and random-number generator 11. Noise immunity of the communication relay station is enhanced due to random change-over of input circuits of the communication relay station receiving section spatially matched with the width of the major lobe of the ground station directional pattern, which prevents the noise source with narrow-directional antennas from continuous aimed suppression of the whole communication relay station. EFFECT: enhanced noise immunity. 5 dwg