System and Method for Calibration of Timing Mismatch for Envelope Tracking Transmit Systems
AssigneeIntel Mobile Communications GmbH
InventorsAlexander Belitzer, Gunther Kraut
Life of this patent
Estimating the term…
Abstract
One embodiment of the present invention relates to a system for calibrating of timing between an amplifier input signal and a modulated supply power. The system includes a supply modulation component, an error metric component, and a delay determiner. The supply modulation component provides the modulated supply power and the amplifier input signal according to an input signal and a set delay signal. The error metric component provides information from a transmitted amplitude signal and a received amplitude signal. The delay determiner generates timing adjustments in the form of the set delay signal from the error metric information.
Claims20
A system for calibration of timing mismatch, the system comprising:
- a supply modulation component configured to receive an input signal and a set delay signal and provide a modulated supply power and an amplifier input signal according to the input signal and the set delay signal;
- and
- a power amplifier configured to generate an output signal from the input signal and the modulated supply power;
- and
- a delay determiner configured to generate the set delay signal to adjust timing alignment of the modulated supply power and the input signal.
A method for calibrating timing alignment comprising:
- introducing a plurality of negative delays into a timing alignment between a modulated supply signal and an amplifier input signal;
- obtaining a plurality of negative delay error levels based on the plurality of negative delays;
- introducing a plurality of positive delays into the timing alignment;
- obtaining a plurality of positive delay error levels based on the plurality of positive delays;
- and
- identifying an intercept point based on the plurality of negative delays, the plurality of negative delay error levels, the plurality of positive delays, and the plurality of positive delay error levels.
A method for calibrating timing alignment for a power amplifier, the method comprising:
- obtaining an initial error level;
- introducing a timing adjustment between a modulated supply signal and an amplifier input signal by a first amount in a first direction;
- obtaining a first error level based on the first amount in the first direction;
- and
- on the first error level being larger than the initial error level, introducing a second timing adjustment by a second amount in a second direction opposite the first direction.
Dependencies are inferred from the claim text.