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:
Nov. 21, 2017
Filed:
Jan. 12, 2016
Google Inc., Mountain View, CA (US);
Farbod Tabatabai, Sausalito, CA (US);
Dedi David Haziza, Sunnyvale, CA (US);
Google Inc., Mountain View, CA (US);
Abstract
This disclosure provides systems, methods, and apparatus for a radio frequency transceiver. The transceiver includes a modulator for modulating a data signal onto one or more carrier signals to generate a modulated signal and a power amplifier for amplifying the modulated signal. The transceiver also includes a data pre-distorter (DPD) for pre-distorting the data signal using a look-up table that represents a non-linear transfer function that is an inverse of the non-linear transfer function of the power amplifier. The DPD selects one or more look-up tables based on a feedback signal corresponding to a power level and/or a phase of the output of the power amplifier. The transmitter also includes a controller for comparing the output of the power amplifier to a desired output level and upon sensing changes, altering the amplitude and phase of the feedback signal to substantially constant values.