Nonlinear power amplifier operating mode indication

An apparatus for wireless communication at a receiving device, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a first device, a first message indicating a power amplifier operating mode associated with non-linear distortion of an input waveform for a power amplifier of the first device, wherein the power amplifier operating mode is from a set of two or more power amplifier operating modes each associated with respective amounts of the non-linear distortion;
• measure a set of reference signals associated with estimation of a wireless channel for a transmission by the first device;
• and
• measure an additional set of reference signals associated with non-linear distortion mitigation for the transmission, wherein a resource density of the additional set of reference signals is based at least in part on the power amplifier operating mode.

A method for wireless communication, comprising:

• determining a power amplifier operating mode associated with non-linear distortion of an input waveform for a power amplifier, wherein the power amplifier operating mode is from a set of two or more power amplifier operating modes each associated with respective amounts of the non-linear distortion;
• transmitting a set of reference signals associated with estimation of a wireless channel for a transmission;
• and
• transmitting an additional set of reference signals associated with non-linear distortion mitigation for the transmission, wherein a resource density of the additional set of reference signals is based at least in part on the power amplifier operating mode.

A method for wireless communication at a receiving device, comprising:

• receiving, from a first device, a first message indicating a power amplifier operating mode associated with non-linear distortion of an input waveform for a power amplifier of the first device, wherein the power amplifier operating mode is from a set of two or more power amplifier operating modes each associated with respective amounts of the non-linear distortion;
• measuring a set of reference signals associated with estimation of a wireless channel for a transmission by the first device;
• and
• measuring an additional set of reference signals associated with non-linear distortion mitigation for the transmission, wherein a resource density of the additional set of reference signals is based at least in part on the power amplifier operating mode.