Multiplex communications – Wide area network – Packet switching
Patent
1984-02-13
1985-01-22
Griffin, Robert L.
Multiplex communications
Wide area network
Packet switching
375 58, H04B 110
Patent
active
044956193
ABSTRACT:
The present invention relates to transmitters and receivers in a digital time division multiple access (TDMA) communication system wherein the resource sharing concept is generalized by fully exploiting the available clear air carrier-to-noise ratio (CNR) of a transmission link to achieve very high transmission capacity while maintaining low rain outage. Transmission is accomplished by using a first predetermined redundancy code and a first predetermined signal constellation for quadrature amplitude modulation during clear air conditions to permit a high rate of information transfer. When the fade depth exceeds the built-in fade margin, a second predetermined redundancy code and a second predetermined signal constellation is used while using time slots borrowed from a resource sharing reserved time slot pool to maintain the data rate at the fade site. Either one of the first redundancy code or signal constellation can equal either one of the second redundancy code or signal constellation.
REFERENCES:
patent: Re28577 (1975-10-01), Schmidt
patent: 3487362 (1969-12-01), Frey
patent: 3505479 (1970-04-01), Hodge
patent: 3524136 (1970-08-01), Albersheim
patent: 3534264 (1970-10-01), Blasbalg et al.
patent: 3632885 (1972-01-01), Herold
patent: 3634628 (1972-01-01), Sekimoto et al.
patent: 3649764 (1972-03-01), Maillet
patent: 3676778 (1972-07-01), Mori
patent: 3688196 (1972-08-01), Doelz
patent: 3848093 (1974-11-01), Edstrom
patent: 3980945 (1976-09-01), Bickford
patent: 4309771 (1982-01-01), Wilkens
Datamation, Jul., 1978, "The Future of Commercial Satellite Telecommunications", by W. White et al., pp. 94-102.
AIAA 7th Comm. Satellite Systems Conf., San Diego, Calif., Apr. 24-27, 1978, "Channel Coding . . . ", by A. Acampora, pp. 479-487.
Conf. Rec. of the 26th Convention of Nuclear Elec. and Aerospace, Rome, Italy, Mar. 9-18, 1979, "Technical Aspects . . . ", F. Carassa.
BSTJ, vol. 58, (9), Nov., 1979, "A Shared Resource TDMA Approach to Increase . . . ", by A. Acampora, pp. 2097-2111.
AT&T Bell Laboratories
Chin Stephen
Griffin Robert L.
Pfeifle Erwin W.
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