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:
Sep. 13, 2011
Filed:
Feb. 26, 2007
Christopher D. Moffatt, Palm Bay, FL (US);
G. Patrick Martin, Merritt Island, FL (US);
James Tonti, Valkaria, FL (US);
Christopher D. Moffatt, Palm Bay, FL (US);
G. Patrick Martin, Merritt Island, FL (US);
James Tonti, Valkaria, FL (US);
Harris Corporation, Melbourne, FL (US);
Abstract
Predistorting an input signal prior to amplification in an RF power amplifier () includes isolating a plurality sub-band signals, each representing a portion of the input signal s(t). The method includes independently modifying an amplitude and a phase of each of the plurality of sub-band signals. The modification of the amplitude and/or phase is performed using a set of signal weighting parameters (weights) w and W, controlling linear and nonlinear modifications respectively, which are determined in an adaptive process by an adaptive controller (). After modification, each of the sub-bands are summed together to obtain a predistorted input signal for an RF power amplifier ().