Pulse or digital communications – Repeaters – Testing
Patent
1994-11-15
1997-06-10
Chin, Wellington
Pulse or digital communications
Repeaters
Testing
375285, 380 34, 455 132, 455 331, 370320, 370321, H04B 1500, H04K 104, H04L 2730
Patent
active
056383991
ABSTRACT:
The satellite radio communication system of this invention provides communication between one or more service centers and an ensemble of fixed and mobile user terminals. One or more earth orbiting satellites are provided with each satellite having transmitter forming a down-link channel which is slow frequency hopped, and a multi-beam antenna system with a single channel per beam to time division multiple broadcast signals to all user terminals covered by each said beam, respectively. Each user terminal includes a transceiver for receiving a down-link channel broadcast from the one of said beams in whose path it lies, and a return link comprised of a dedicated narrow band broadcast channel with slow frequency hopping of down-link channel. There is a fixed set of frequencies through which the frequency hopping is carried out, with the plurality of fixed and mobile user terminals using the same set of frequency hopping frequencies. Mutually synchronized transmissions from each user is such that while the ensemble of users display the same set of frequency hopping frequencies, each user in said ensemble of fixed and mobile user terminals employs a unique frequency at each instant of time.
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Newton, Newton's Telecom Dictionary, pp. 218 and 1012. 1994.
Bruno Ronald
Schuchman Leonard
Weinberg Aaron
Chin Wellington
Luther William
Stanford Telecommunications, Inc.
Zegeer, Esq. Jim
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