Patent · US Expired

Multi-carrier transmission systems

US6320903A · kind A · utility

26Cited by

5References

20Claims

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 Bahlenbert · 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 7, 1999
Grant date	Nov 20, 2001
Priority date	—
Expiry date	Jun 7, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2025/03522
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A multi-carrier transmission system using orthogonal carriers with high order QAM constellations for the transmission of a plurality of bits per carrier and symbol. The system uses some method for the determination of an inverse channel model to be used in the equalization process. In the frequency domain, this is normally based on an estimate of the channel attenuation and phase for each carrier. A simplified method of equalization is provided which uses data at the symbol carrier input and output to adaptively estimate an inverse channel model.

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