Systems and methods providing adaptive power tracking

A method for performing average power tracking in a radio frequency (RF) system, the method comprising:

• storing a set of initial values for RF device gain and output power level at a first bias value for a power amplifier;
• applying a first RF device gain value from the set of initial values in response to operating at a first output power level;
• sampling an output signal of the power amplifier and analyzing a down converted and digital representation of the output signal for a linearity characteristic;
• and
• adjusting a bias of the power amplifier to a second bias value in response to determining the linearity characteristic.

A radio frequency (RF) system comprising:

• means for storing a set of initial values for RF device gain an output power level at a first bias value for a power amplifier;
• means for generating a plurality of digital bits at a first RF device gain value from the set of initial values in response to operating at a first output power level;
• means for analyzing a down converted and digital representation of an output signal of the power amplifier to measure adjacent channel leakage ratio (ACLR) associated with the power amplifier;
• and
• means for adaptively adjusting a bias of the power amplifier to a second bias value in response to comparing measured ACLR with a target for ACLR.

A computer program product having a computer readable medium tangibly recording computer program logic for performing adaptive power tracking in a system having a modem and a power amplifier, the computer program logic including code which when executed by one or more processors causes the one or more processors to:

• receive a first command instructing operation at a first output power level;
• in response to the first command, applying a default power amplifier bias and a modem gain value in accordance with the first output power level;
• down converting and digitizing an output of the power amplifier;
• digitally measuring a linearity characteristic of the power amplifier after the down converting and digitizing;
• and
• adjusting a bias of the power amplifier down in response to measuring the linearity characteristic at a value below a linearity target.