Telecommunication system with increased channels by use of orbit

Details Telecommunication system with increased channels by use of orbit Telecommunication system with increased channels by use of orbit

1993-04-01

1995-10-03

Pham, Chi H.

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

455 62, 455 63, 455 676, 3701041, 342358, H04B 110, H04B 1700, H04B 7185, H04J 306

Patent

active

054559618

ABSTRACT:
An orbiting satellite-based telecommunication system for providing store and forwarding service by having a ground station, in response to an instruction from an orbiting satellite over a specific communication channel of the down link, supply transmit data to the orbiting satellite through an unused one of a plurality of communication channels of the up link in accordance with a packet protocol, and having the ground station in response to another instruction from the orbiting satellite through the down link, receive the transmit data from the orbiting satellite through an unused one of said plurality of communication channels in accordance with the protocol wherein said orbiting satellite is provided with a divider for dividing the frequency band of the up link into a plurality of subchannels on the basis of the Doppler shift amount due to variations in the distance between a terminal and the orbiting satellite; a demodulator for demodulating the transmit data on a subchannel-by-subchannel basis; and data processor for processing said transmit data, demodulated on a subchannel-by-subchannel basis, by a predetermined procedure.

REFERENCES:
patent: 3879581 (1975-04-01), Schlosser et al.
patent: 4191923 (1980-03-01), Schelisch
patent: 5095538 (1992-03-01), Durboraw, III
D. W. Davies, et al., "Computer Networks and Their Protocols", Corona Corp. Japan, Aug. 10, 1986, pp. 90-117.
J. M. Radbone, "UoSAT: A Decade of Experience Pioneering Microsattelites", Symposium International Small Satellite Systems and Services, Jun. 6-Jul. 3, 1992, pp. 1-9.

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