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. 13, 2009
Filed:
Nov. 27, 2007
Damon G. Holmes, Calgary, CA;
David M. Tholl, Calgary, CA;
Peter Zahariev Rashev, Calgary, CA;
John-peter Van Zelm, Calgary, CA;
Damon G. Holmes, Calgary, CA;
David M. Tholl, Calgary, CA;
Peter Zahariev Rashev, Calgary, CA;
John-Peter van Zelm, Calgary, CA;
Nortel Networks Limited, St. Laurent, Quebec, CA;
Abstract
A power amplifier system includes a nonlinear power amplifier that receives a predistorted input signal. A receiver receives an output signal from the power amplifier and provides an observed signal. A bias controller provides a delayed dynamic bias signal to the power amplifier wherein the bias signal delay is dynamic and is a function of the observed signal for synchronizing the predistorted input signal with the dynamic bias signal. A method is also described that alternately adjusts predistortion delays and bias signal delays as a function of observed signals.