High-speed digital subscriber lines

Details High-speed digital subscriber lines High-speed digital subscriber lines

1994-11-07

1997-09-16

Chin, Wellington

Multiplex communications

Duplex

370281, 370295, 370480, 370525, 375275, H04J 1100, H04J 400

Patent

active

056688024

ABSTRACT:
A communications system employs a high-speed digital link with discrete multiple tone (DMT) the outward paths from a central transmitter/receiver to further transmitter/receivers receiving signals therefrom using one set of carrier frequency channels and the return signal paths using a different set of carrier frequency channels.
In one form the central transmitter/receiver is an exchange and the further transmitter/receivers are subscribers connected to the exchange.

REFERENCES:
patent: 4438511 (1984-03-01), Baran
patent: 4864564 (1989-09-01), Parker et al.
patent: 5317596 (1994-05-01), Ho et al.
European Transactions On Telecommunications And Related Technologies, Col. 4, No. 3, May 1993, pp. 257-266, Peter S. Chow, et al., A Multicarrier E1-HDSL Transceiver System with Coded Modulation.
IEEE International Conference On Communications 1993, 26 May 1993, pp. 772-776, Minnie Ho, et al., High-Speed Full-Duplex Echo Cancellation For Discrete Multitone Modulation.

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