Patent · US Expired

Multi-carrier transmission systems

US6366554B1 · kind B1 · utility

29Cited by

9References

48Claims

0Family size

Assignee

STMICROELECTRONICS N.V. · NL

Inventors

Mikael Isaksson · Luleå, SE
Magnus Johansson · Luleå, SE
Harry Tonvall · Luleå, SE
Lennart Olsson · Luleå, SE
Tomas Stefansson · Luleå, SE
Hans Ohman · Luleå, SE
Gunnar Bahlenberg · Luleå, SE
Anders Isaksson · Luleå, SE
Goran Okvist · Luleå, SE
Lis-Marie Ljunggren · Luleå, SE
Tomas Nordstrom · Luleå, SE
Lars-Ake Isaksson · Luleå, SE
Daniel Bengtsson · Luleå, SE
Siwert Hakansson · Luleå, SE
Ye Wen · Luleå, SE

Key dates

Filing date	Jun 1, 1999
Grant date	Apr 2, 2002
Priority date	—
Expiry date	Jun 1, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2025/03802
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A multi-carrier transmission system, for example a DMT system. Channel information is transmitted between two transceivers using a plurality of subcarriers. Each subcarrier, or symbol, has a parameter associated with it. The transceivers are adapted to transmit the channel information as a sequence of n groups in which each of the n groups contains information concerning the number of adjacent subcarriers which have the same value as the parameter, together with the actual value of the parameter. The parameter which may have a plurality of discrete values, may be a bit-loading value, or a QAM constellation identifier.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.