Patent · US Active

Recalibration of envelope tracking transfer function during active transmission

US8824981B2 · kind B2 · utility

11Cited by

8References

30Claims

0Family size

Assignee

Intel Mobile Communications GmbH · DE

Inventors

Andreas Langer · Munich, DE
Gunther Kraut · Egmating, DE
Berndt Pilgram · Munich, DE

Key dates

Filing date	Jan 31, 2013
Grant date	Sep 2, 2014
Priority date	—
Expiry date	Jan 31, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2200/336
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

An envelope tracking system and a method for adjusting a nonlinear transfer function of an envelope tracking power supply for a power amplifier are provided. An output signal of the power amplifier is provided to a feedback receiver for determining an actual performance of the envelope tracking power amplifier. An assumed performance of the envelope tracking power amplifier is determined by evaluating the non-linear transfer function at a value defined by an input signal for a transmitter including the power amplifier. A difference between the assumed performance and the actual performance provides a correctional value for the nonlinear transfer function.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.