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:
Mar. 29, 2016
Filed:
Aug. 01, 2014
Apple Inc., Cupertino, CA (US);
Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Theagaraya Nagar, IN;
Apple Inc., Cupertino, CA (US);
Abstract
Methods for performing predistortion calibration on wireless communications circuitry are provided. The wireless communications circuitry may be adjusted using a digital gain setting and a radio gain index setting. A particular channel in a given band exhibiting the maximum dynamic range may be selected for measurement. Predistortion coefficient values may be computed based on measured results in the select channel. A power list may be obtained for the selected channel based on a maximum peak power level. A reference power list may then be obtained based on the minimum dynamic range in the given band. The predistortion coefficients associated with the selected channel may be translated from its power list to the reference power list. Predistortion coefficients for the remaining channels in the given band may similarly be computed by interpolating/extrapolating based on the values in their respective power lists and the reference power list.