Earth station capable of effectively using a frequency band of a

Details Earth station capable of effectively using a frequency band of a Earth station capable of effectively using a frequency band of a

1988-08-24

1990-02-27

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 691, 375 1, H04J 1300, H04J 102

Patent

active

049052217

ABSTRACT:
For use in a satellite communication system which carries out communication through a satellite by the use of an up-link frequency band and a down-link frequency band, each of the up-link and the down-link frequency bands has a plurality of frequency subbands spaced apart from one another with frequency gap bands interposed between the frequency subbands. An earth station comprises a modulating arrangement (47) for modulating a selected one of the frequency subbands of the up-link frequency band by a first input signal into a subband transmission signal; a first transmitting arrangement (51) coupled to the modulating arrangement for transmitting the subband transmission signal through the selected one of the frequency subbands; a spread spectrum processing arrangement (50) for processing a second input signal into a spread spectrum transmission signal in the up-link frequency band; and a second transmitting arrangement (51) coupled to the spread spectrum processing arrangement for transmitting the spread spectrum transmission signal through the up-link frequency band.

REFERENCES:
patent: 4425642 (1984-01-01), Moses et al.
patent: 4455651 (1984-06-01), Baran
patent: 4672605 (1987-06-01), Hustig et al.
patent: 4703474 (1987-10-01), Foschini et al.
patent: 4811357 (1989-03-01), Betts et al.
patent: 4821120 (1989-04-01), Tomlinson
"A Domestic Satellite Communication System" by van Iterson et al, Phillips Telecommunication Review, vol. 36, No. 2, Jun. 1978, pp. 116-132.

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