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:
Jan. 26, 2010
Filed:
Sep. 05, 2006
Mingyuan LI, La Jolla, CA (US);
Peter Asbeck, Del Mar, CA (US);
Ian Galton, Del Mar, CA (US);
Lawrence E. Larson, Del Mar, CA (US);
Mingyuan Li, La Jolla, CA (US);
Peter Asbeck, Del Mar, CA (US);
Ian Galton, Del Mar, CA (US);
Lawrence E. Larson, Del Mar, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
The invention provides methods and devices for estimating power amplifier nonlinearity using simple correlation techniques. Methods and devices of the invention can monitor a power amplifier that has digitally modulated inputs and an output containing more than one signal stream. A preferred method of the invention creates a test signal by forming the products of several pseudorandom noise sequences from the digitally modulated inputs to the power amplifier. Nonlinear contributions of the power amplifier output are determined by cross-correlating the test signal and the total output signal of the power amplifier. In preferred embodiments, the determined nonlinear contributions of the power amplifier are used to introduce corrective predistortion in the power amplifier.