Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Patent
1998-06-04
2000-12-12
Cumming, William
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
455 131, 455405, 455556, 249158R, 370320, 375200, H04B 7185, H04B 7216, H04M 1100, H04M 100, B64G 100
Patent
active
061609943
ABSTRACT:
A communications system includes at least one low earth orbit first satellite (10), at least one second satellite (11) in other than a low earth orbit, and a ground segment (12) that includes a plurality of user transceivers (78, 80, 82, 84) and at least one gateway (76) coupled to a publicly-accessible terrestrial communications system, such as a PSTN and/or a fiber optic network. The first satellite includes a first transceiver for communication with the at least one gateway, a second transceiver for communication with at least one user transceiver, and a third transceiver for communication with the at least one second satellite. The first, second and third transceivers are switchably coupled together on-board the first satellite by on-board processors, and a switching matrix for relaying a user communication between the at least one gateway and the at least one user transceiver via the at least one second satellite. The plurality of user transceivers can include a plurality of data processors which are interconnected into a network through the at least one first satellite. This network can be considered as a virtual network, and can have a mesh, star, or other topology. The user transceivers can be adapted to transmit and receive direct sequence, code division/multiple access communications. Transmission of signals to and from the user transceivers is accomplished by spreading a digital data stream (e.g., voice, data, image, video) with assigned spreading codes.
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Cumming William
Globalstar L.P.
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