Methods of calibrating a power amplifier system to compensate for envelope amplitude misalignment

A power amplifier system with calibration for envelope amplitude misalignment, the power amplifier system comprising:

• a power amplifier configured to amplify a radio frequency signal;
• an envelope tracker configured to generate a supply voltage of the power amplifier, the envelope tracker configured to generate a scaled envelope signal based on a power control level signal and an envelope signal, and to shape the scaled envelope signal based on shaping data generated at a target gain compression;
• a transceiver configured to generate the radio frequency signal, the power control level signal, and the envelope signal, the transceiver configured to monitor an output of the power amplifier to determine an amount of scaling of the scaled envelope signal at which a detected gain compression of the power amplifier corresponds to the target gain compression;
• and
• a calibration module configured to control scaling of the scaled envelope signal, and to compensate for envelope amplitude misalignment based on the determined amount of scaling at which the detected gain compression corresponds to the target gain compression.