Frequency tuning for satellite ground stations

Details Frequency tuning for satellite ground stations Frequency tuning for satellite ground stations

1992-12-04

1995-11-28

Eisenzopf, Reinhard J.

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

455 501, 455 673, 455 71, H04B 7185

Patent

active

054716578

ABSTRACT:
A satellite communications network tuning system which consumes very little communications bandwidth is disclosed. The network has a first terminal for transmitting and receiving signals, a second terminal in communication with the first for transmitting signals and a satellite for receiving signals from the terminals and retransmitting them. The frequency of the retransmitted signals is offset from the frequency at which the signals were received. A method according to the present invention for compensating the transmit frequency of the second terminal for the satellite frequency offset comprises transmitting a signal from the first terminal to the satellite at a first frequency, receiving the retransmitted signal from the satellite at the first terminal at a second frequency, the second frequency being offset from the first frequency by the satellite, measuring, at the first terminal, the difference between the first frequency and the second frequency to obtain an offset, transmitting the offset from the first terminal to the second terminal, and adjusting the transmit frequency of the second terminal using the offset.

REFERENCES:
patent: 4509200 (1985-04-01), Lugenbuhl et al.

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