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:
Jul. 17, 2012
Filed:
Jun. 13, 2005
Dennis Mahoney, High Point, NC (US);
Dennis Mahoney, High Point, NC (US);
RF Micro Devices, Inc., Greensboro, NC (US);
Abstract
A method is provided for optimizing Amplitude Modulation to Amplitude Modulation (AM/AM) and Amplitude Modulation to Phase Modulation (AM/PM) predistortion of a polar modulated transmit signal in a mobile terminal in order to optimize an Output Radio Frequency Spectrum (OFRS) of the mobile terminal. The AM/AM and AM/PM predistortion of the polar modulated transmit signal compensates for AM/AM and AM/PM distortion of a power amplifier in the transmit chain of the mobile terminal. However, the AM/AM and AM/PM distortion of the power amplifier cannot be easily measured or computed. Accordingly, the present invention provides a system and method for optimizing coefficients for polynomials defining the AM/AM and AM/PM predistortion of the polar modulated transmit signal based on optimizing the OFRS of the mobile terminal.