Bisdn compatible modem codec for digital information communicati

Details Bisdn compatible modem codec for digital information communicati Bisdn compatible modem codec for digital information communicati

1991-11-12

1995-02-28

Chin, Stephen

Pulse or digital communications

Pulse code modulation

332103, 375262, 375280, 375308, H04B 1404

Patent

active

053944399

ABSTRACT:
A modem/codec is designed for a digital signal transmission system using a single satellite transponder. The system is capable of transmitting data of a rate of 155.52 Mbps, and is thus compatible with the BISDN rate. A codec of rate 13/15 is used, and an octal phase shift keying modem is also used. In this way, the digital signal transmission system is capable of receiving data at a rate of 155.52 Mbps over a single INTELSAT V/VA transponder with a usable bandwidth of 72 MHz.

REFERENCES:
patent: 4941154 (1990-07-01), Wei
patent: 5020057 (1991-05-01), Taniguchi et al.
patent: 5056117 (1991-10-01), Gitlin et al.
patent: 5115453 (1992-05-01), Calderbank et al.
patent: 5128964 (1992-07-01), Mallory
"A B-ISDN Compatible Modem/Codec," F. Hemmati and S. Miller, presented at the Second Annual NASA Space Communications Technology Conference, Nov. 12-14, 1991, Cleveland, Ohio.

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