Method and system for transmitting radio signals between a fixed

Details Method and system for transmitting radio signals between a fixed Method and system for transmitting radio signals between a fixed

1996-07-08

1998-06-09

Urban, Edward F.

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

455428, 455429, 370319, H04B 7185

Patent

active

057650985

ABSTRACT:
The invention concerns a method and a system for transmitting radio signals between a fixed terrestrial station and mobile user terminals via a network of satellites in inclined circular orbits having a radius less than that of geostationary orbits. The beams generated are divided into pencil beams each associated with a continuous sub-band of frequencies in increasing frequency or decreasing frequency order. The instantaneous transmission frequency is offset progressively during the call towards the frequency subband of the adjacent pencil beam, at a rate proportional to the orbital rotation speed, to enable switching between pencil beams or between satellites. Applications include transmission via satellites in non-geostationary orbit.

REFERENCES:
patent: 5161248 (1992-11-01), Bertiger et al.
patent: 5483664 (1996-01-01), Moritz et al.
patent: 5559806 (1996-09-01), Kurby et al.
patent: 5574968 (1996-11-01), Olds et al.
patent: 5621415 (1997-04-01), Tuck

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