Multiplex communications – Communication over free space – Repeater
Reexamination Certificate
2007-10-30
2007-10-30
Chan, Wing (Department: 2616)
Multiplex communications
Communication over free space
Repeater
Reexamination Certificate
active
10462094
ABSTRACT:
Embodiments of the present invention are directed to a satellite communications system between satellites and terminal units that are sufficiently small to be handheld units and that operate within the earth power flux density limit. This is accomplished by using spreading spectrum waveform protocols that make efficient use of the allocated bandwidth. In one embodiment, a satellite communications system comprises at least one satellite, and at least one ground station each corresponding to one of the at least one satellite. Each ground station includes a spread spectrum transmitter and a spread spectrum receiver. Each of a plurality of mobile terminals includes a spread spectrum transmitter and a spread spectrum receiver. The spread spectrum transmitter of the at least one ground station is configured to communicate via the corresponding satellite with the spread spectrum receivers of the mobile terminals, and the spread spectrum receiver of the at least one ground station is configured to communicate via the satellite with the spread spectrum transmitter of the mobile terminals, using spread spectrum signals generated from baseband information signals narrower in bandwidth than the spread spectrum signals.
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Blanchard Scott
Edlund Gregory E.
Peterson Steven R.
Thacker John C.
Burrowes Lawrence J
Chan Wing
General Dynamics Decision Systems, Inc.
Lockheed Martin Corporation
Marsh & Fischmann & Breyfogle LLP
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