Transmission apparatus for orbiting satellite

Details Transmission apparatus for orbiting satellite Transmission apparatus for orbiting satellite

1994-12-30

1995-11-07

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342375, 455 121, H04B 7185

Patent

active

054650968

ABSTRACT:
A transmission apparatus for an orbiting satellite which can establish stabilized frame synchronization even if the distance between the round-trip satellite and a communications terminal varies and which can minimize the displacement between a frame signal received on the ground and another frame signal generated in a communications terminal. The transmission apparatus comprises M (M is an integral number equal to or greater than 2) composers for forming frame signals, M transmitters for outputting M spot beams having different radiation directions, and M delay circuits interposed between the composers and the transmitters. The delay times of the delay circuits are set so that they are long where the radiation angles of the corresponding spot beams are small, but they are shorter where the radiation angles are larger.

REFERENCES:
patent: 4456988 (1984-06-01), Nakagome et al.
patent: 5081464 (1992-01-01), Renshaw
Motorola Satellite Communications, Inc., "Iridium, A Low Earth Orbit Mobile Satellite System", Application Before the Federal Communications Commission, Washington, D.C., Dec. 1990.

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