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. 04, 2014
Filed:
Jun. 29, 2012
Ali Afsahi, San Diego, CA (US);
Utku Seckin, La Jolla, CA (US);
Colin Fraser, Mountain View, CA (US);
Navid Lashkarian, Pleasanton, CA (US);
Konrad Kratochwil, Sunnyvale, CA (US);
Arya Reza Behzad, Poway, CA (US);
Dengwei Fu, Los Altos, CA (US);
Ali Afsahi, San Diego, CA (US);
Utku Seckin, La Jolla, CA (US);
Colin Fraser, Mountain View, CA (US);
Navid Lashkarian, Pleasanton, CA (US);
Konrad Kratochwil, Sunnyvale, CA (US);
Arya Reza Behzad, Poway, CA (US);
Dengwei Fu, Los Altos, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Communication processing paths include distortions, such as DC offset in the baseband analog path, local oscillator feed-through distortion, and nonlinearity of gm's and power amplifiers which are calibrated for, separately or in combination. The cascaded DC offset and nonlinear distortions are modeled separately or in combination using even-and-odd order polynomials. A loopback path from the output of one or more distortion causing devices passes through a measurement and calculation module. The calculation module calculates predistortion polynomial's coefficients which will be stored in a look-up table to be used by a baseband predistorter to calibrate the path. The look-up table is stored locally or remotely.