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. 25, 2003
Filed:
Jun. 01, 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 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 transmission system using nQAM. A control channel is superimposed on a nQAM data channel. It is desirable to separate control channel data from user data without using a higher level protocol layer. In multi-carrier systems with variable bit-loading it is particularly desirable that the control channel data be separable from user data when the value of n. that is the bit-loading, or constellation identifier are unknown. Binary data is transmitted using nQAM modulation. The binary data includes both user data and control data. This means that a control channel is superimposed on a user data channel within the same nQAM constellation. Separation of the control data is facilitated by arranging control data points to have either a unique phase or unique amplitude values. These unique values are not employed for user data points.