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:
Mar. 08, 2005
Filed:
Jul. 15, 1997
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 Bahlenberg, 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;
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 Bahlenberg, 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;
STMicroelectronics N.V., Amsterdam, NL;
Abstract
A multi-carrier transmission system has a plurality of transceivers, each having a receiver and a transmitter. Data is transmitted between the transceivers by modulating the data onto a multiplicity of carrier waves in the form of multi-bit symbols, wherein each carrier wave constitutes a channel, and wherein the number of bits per symbol (the bit loading), varies between channels and, within a channel, with time, so that each channel has associated therewith a bit loading parameter. In operation, the multi-carrier system is adapted to synchronously update, at the transceivers, the bit loading parameters associated with each channel by transmission of data over a control channel, in that the control channel is established, at system start-up, on a predetermined one of the multiplicity of carrier waves whose identity is known to the transceivers, and in that the control channel is, after start-up, changed from the predetermined channel to a further channel, selected by the first transceiver on the basis of channel characteristics.