System for two-way communication between a master station and a

Details System for two-way communication between a master station and a System for two-way communication between a master station and a

1977-03-28

1978-09-26

Olms, Douglas W.

325 4, H04J 306

Patent

active

041172671

ABSTRACT:
A system for communication between aircraft and a ground control center via a satellite. Information is transmitted in bursts from all the aircraft to the ground control center on a time division multiple access basis in a first radio frequency channel common to all of the aircraft and information is transmitted from the ground control center to the aircraft on a second radio frequency channel different than the first radio frequency channel. The time division multiple access bursts transmitted by the aircraft are synchronized in a particularly simple manner by the ground control center by transmitting a reference frame sync signal on the second radio frequency channel.

REFERENCES:
patent: 3566267 (1971-02-01), Golding
patent: 3761813 (1973-09-01), Perrin
patent: 3818453 (1974-06-01), Schmidt et al.
patent: 3858007 (1974-12-01), Ganssmantel
patent: 3982075 (1976-09-01), Jefferis et al.
patent: 4001690 (1977-01-01), Mack et al.
patent: 4004225 (1977-01-01), Ganssmantel

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