Satellite communication system

Details Satellite communication system Satellite communication system

1986-07-29

1988-05-31

Cangialosi, Salvatore

Multiplex communications

Wide area network

Packet switching

370104, H04J 306

Patent

active

047486228

ABSTRACT:
A satellite communication among a plurality of small earth stations (very small aperture terminal;VSAT) through a satellite is performed by using a relay earth station which has higher power than a small earth station. A signal goes from an originating small earth station to a destination small earth station, through a satellite, a relay earth station, and a satellite by using two hops propagation. Communication is carried out in digital form. The relay earth station regenerates digital signals from small earth stations. In the process of the regeneration of the digital signals, the error correction technique is applied to reduce the error rate, and a frequency compensation technique is also employed. Thus, a small simple earth station can provide high quality of communication with high C/N. A reference clock signal for operating a small earth station is derived from a reception signal from a satellite.

REFERENCES:
patent: 3982075 (1976-09-01), Jefferis et al.
patent: 4001690 (1977-01-01), Mack et al.
patent: 4105973 (1978-08-01), Arnold et al.
patent: 4320503 (1982-03-01), Acumpora
patent: 4455651 (1984-07-01), Baran
patent: 4506383 (1985-05-01), McGann
patent: 4532635 (1985-07-01), Mangulis
patent: 4617674 (1986-10-01), Mangulis et al.

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