SATELLITE COMMUNICATION SYSTEM Russian patent published in 1998 - IPC

FIELD: radio communications. SUBSTANCE: central station has series-connected antenna 5, receiver 6, demodulator 7, channel quality evaluation unit 30, RESET signal shaper 27, as well as message source 9 whose input is connected to output of channel quality evaluation unit 30. Output of RESET signal shaper 27 and that of message source 5 are connected through respective circuits set up of series-connected modulator 10 and transmitter 11 to inputs of matching device 16 whose output is connected to input of antenna 12. Subscriber's station has series-connected receiving antenna 1 and receiver 2 whose output is connected to two circuits each incorporating filter 24 and demodulator 3; output of one of demodulators 3 is connected directly and other one, through RESET signal discriminating device 26, to switch 25. Output of switch 25 is connected to input of message user 4. Repeater has series-connected receiving antenna 13 and receiver 14 whose output is connected to two circuits each incorporating series-connected filter 15 and demodulator 17. Demodulator 17₁ is connected to repeat storage 16 and demodulator 17₂, to second input of repeat storage 18 through RESET signal discriminating device 21 and delay circuit 28. Output of repeat storage 18 is connected to modulator 22₁ which is connected through transmitter 19₁ to input of matching device 23. Transmitter 19₂ is connected to second input of matching device 23 and through modulator 22₂, to output of demodulator 17₂. EFFECT: improved reliability of communications under various noise conditions due to introduction of adaptive repeat storage.