Dama type satellite communication system using non-overlapped mu

Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater

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455 132, 455430, 370315, H04B 715

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active

057376840

ABSTRACT:
Even when a multi-spot beam is utilized, a demand assignment multiple access (DAMA) type satellite communication can be established between a plurality of satellite earth stations installed in one zone located opposite to another zone where a control station is installed, and between the control station and the satellite earth station installed in the same zone. The control station transmits a channel setting signal for setting a communication channel to the satellite earth stations installed in the opposite zones by using a CSC signal, and further sets a channel of a transmitting/receiving unit in such a manner that after the CSC signal derived from the satellite earth station has been received, this CSC signal is returned thereto. A repeater station has a function such that repeater station receives the CSC signal to return this CSC signal, and also receives a communication signal to return this communication signal. The satellite earth station includes a delay device for setting a time defined as after the CSC signal is received, until a response signal is transmitted, based on the received delay data.

REFERENCES:
patent: 4813036 (1989-03-01), Whitehead
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 4951279 (1990-08-01), Hotta
Chris J. Powell et al., "Demand Assignment Multiple Access and Dynamic Channel Allocation . . . Systems", IEEE Journal on Selected Areas in Communications, vol. 10, No. 6, Aug. 1992, pp. 1020-1029.
M.G. Caruso et al., "A Real Time DAMA Management Processor for High . . . Systems", 3rd European Conference on Satellite Communications, Nov. 2-4, 1993, pp. 1-5.

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