Power amplifier compressed reference signals for digital post distortion detection

A method for wireless communication at a user equipment (UE), comprising:

• receiving, from a base station, a set of reference signals comprising a power amplifier uncompressed reference signal and a subset of compressed reference signals that are compressed with respective levels of power amplifier compression;
• performing a channel state measurement on each reference signal of the set of reference signals;
• transmitting, to the base station based at least in part on the channel state measurement performed on each reference signal, a channel state report comprising channel state feedback associated with each reference signal of the subset of compressed reference signals and the power amplifier uncompressed reference signal;
• and
• communicating with the base station based at least in part on a power amplifier compression level that is implemented in accordance with the channel state report.

An apparatus for wireless communication at a base station, comprising:

• a processor;
• a memory coupled with the processor, wherein the memory comprises instructions executable by the processor to cause the apparatus to:
• transmit a set of reference signals to a user equipment (UE), the set of reference signals comprising a power amplifier uncompressed reference signal and a subset of compressed reference signals that are compressed with respective levels of power amplifier compression;
• receive a channel state report from the UE comprising channel state feedback associated with the power amplifier uncompressed reference signal and each reference signal of the subset of compressed reference signals;
• select a power amplifier compression level for communications with the UE based at least in part on the channel state report;
• and
• communicate with the UE according to the selected power amplifier compression level.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a processor;
• a memory coupled with the processor, wherein the memory comprises instructions executable by the processor to cause the apparatus to:
• receive, from a base station, a set of reference signals comprising a power amplifier uncompressed reference signal and a subset of compressed reference signals that are compressed with respective levels of power amplifier compression;
• perform a channel state measurement on each reference signal of the set of reference signals;
• transmit, to the base station based at least in part on the channel state measurement performed on each reference signal, a channel state report comprising channel state feedback associated with each reference signal of the subset of compressed reference signals and the power amplifier uncompressed reference signal;
• and
• communicate with the base station based at least in part on a power amplifier compression level that is implemented in accordance with the channel state report.