Spread packet communication system

Details Spread packet communication system Spread packet communication system

1991-01-22

1993-09-14

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701054, 370108, 375115, H04J 306

Patent

active

052456129

ABSTRACT:
A satellite packet communication system comprising a central station and VSAT stations. The central station generates chip-rate clock pulses and transmits a series of data on timeslots of a frame to a satellite transponder, and a plurality of terminal stations. Each VSAT station receives the frame from the transponder and recovers the chip-rate clock pulses from the received frame. A pseudorandom number (PN) sequence generator, provided in the terminal station is synchronized with the recovered chip-rate clock pulses for generating bits of a PN sequence with which packetized data bits are pseudorandomly modulated and transmitted in burst form to the transponder. The central station includes a correlator which is synchronized with the central station's chip-rate clock pulses to detect correlations between the pseudorandomly modulated data bits a sequence of pseudorandom numbers corresponding to the PN sequence bits of the terminal stations.

REFERENCES:
patent: 5099495 (1992-03-01), Mikoshiba et al.
Abramson, Norman, Proceedings of the IEEE, "VSAT Data Networks", vol. 78, No. 7, Jul. 1990, pp. 1267-1274.
Spread ALOHA for VSAT Networks, Norman Abramson, Technical Report B86-4b, University of Hawaii, Jun., 1986 (rev. Jan. 1987).

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