The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2001
Filed:
Jun. 07, 1999
Mikael Isaksson, Lulea, SE;
Magnus Johansson, Lulea, SE;
Harry Tonvall, Lulea, SE;
Lennart Olsson, Lulea, SE;
Tomas Stefansson, Lulea, SE;
Hans Ohman, Lulea, SE;
Gunnar Bahlenbert, Lulea, SE;
Anders Isaksson, Lulea, SE;
Goran Okvist, Lulea, SE;
Lis-Marie Ljunggren, Lulea, SE;
Tomas Nordstrom, Lulea, SE;
Lars-Ake Isaksson, Lulea, SE;
Daniel Bengtsson, Lulea, SE;
Siwert Hakansson, Lulea, SE;
Ye Wen, Lulea, SE;
ST Microelectronics N.V., Amsterdam, NL;
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.