Over the air reliable digital pre-distortion

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

• receiving, from a network entity, control information indicative of a set of training values for a digital pre-distortion process associated with the network entity, the set of training values comprising a set of crest factor reduction parameters for a crest factor reduction process associated with the network entity;
• receiving, from the network entity, a reference signal;
• determining a set of digital pre-distortion coefficients associated with the digital pre-distortion process based at least in part on the set of training values and the reference signal;
• and
• transmitting, to the network entity, an indication of the set of digital pre-distortion coefficients.

An apparatus for wireless communications at a network entity, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• perform a signal processing procedure on an input signal to generate an output signal, performing the signal processing procedure comprising:
• perform a digital pre-distortion process on the input signal according to a set of digital pre-distortion coefficients to compensate for a distortion of a power amplifier;
• and
• perform a crest factor reduction process on the input signal subsequent to performing the digital pre-distortion process, wherein the set of digital pre-distortion coefficients are based at least in part on performance of the crest factor reduction process;
• amplify the output signal via the power amplifier to generate an amplified signal;
• and
• transmit, to a user equipment (UE), the amplified signal via one or more antennas.

An apparatus for wireless communications at a user equipment (UE), 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 network entity, control information indicative of a set of training values for a digital pre-distortion process associated with the network entity, the set of training values comprising a set of crest factor reduction parameters for a crest factor reduction process associated with the network entity;
• receive, from the network entity, a reference signal;
• determine a set of digital pre-distortion coefficients associated with the digital pre-distortion process based at least in part on the set of training values and the reference signal;
• and
• transmit, to the network entity, an indication of the set of digital pre-distortion coefficients.