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:
Oct. 24, 2000
Filed:
May. 01, 1998
Edgar Velez, Kanata, CA;
Michel Darveau, Aylmer, CA;
Nortel Networks Corporation, Montreal, CA;
Abstract
The invention provides a method and apparatus for scaling transmitter power to a prescribed level (e.g. at or below the maximum average transmitter power supported by the communication system) for a full range of QAM index levels. In particular, in an n-level quadrature amplitude modulation (QAM) communication system having a digital-to-analog converter and an n-QAM signal having an average transmitter power, for transmission on a communication channel, the method of adjusting the average transmitter power of the signal includes selecting a reference QAM index from a prescribed set of QAM index levels (e.g. 4, 16, 64, 256) where the composite signal is processed with a maximum average transmitter power supported by the communication system. The next step involves generating a power adjustment coefficient for each of the QAM index levels from the prescribed set of QAM index levels based on the reference QAM index level. The final step involves adjusting the average transmitter power of the n-QAM signal with the corresponding power adjustment coefficient for the n-QAM signal to scale the average transmitter power to the prescribed maximum average transmitter power.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile