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Proceedings Paper

Synchronized discrete multitone: a bandwidth-efficient solution for the upstream channel of an HFC system
Author(s): John A.C. Bingham
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Paper Abstract

Discrete multitone (DMT) has been accepted as a very effective modulation technique for point-to-point transmission on a channel whose SNR is highly frequency-dependent, and it has been adopted by ANSI as the standard for ADSL [up to 7 Mbit/s on unshielded twisted- pair (UTP)]. Synchronized DMT (SDMT), a variation of DMT for multipoint-to-point transmission, will be proposed to the ATIS committee T1E1.4 for VDSL (up to 51.8 Mbit/s on hybrid fiber/UTP), and to the IEEE committee 802.14 for the upstream channel of an HFC system. This paper describes the method of synchronization, which allows the efficient combination of signals from multiple transmitters without the use of guard bands in either the frequency- or time-domain. It also describes a protocol for controlling access to the shared channel by these transmitters, which may have widely varying needs for data rates and formats.

Paper Details

Date Published: 24 November 1995
PDF: 6 pages
Proc. SPIE 2609, Hybrid Fiber-Coax Systems, (24 November 1995); doi: 10.1117/12.227279
Show Author Affiliations
John A.C. Bingham, Amati Communications Corp. (United States)

Published in SPIE Proceedings Vol. 2609:
Hybrid Fiber-Coax Systems
Wai Sum Lai; Sam T. Jewell, Editor(s)

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