Coefficient estimation for non-linearity cancellation

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

• one or more memories;
• and
• one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the UE to:
• receive a physical downlink shared channel communication that includes a precoding data indication;
• receive a physical downlink control channel communication that includes a plurality of coefficients;
• generate a plurality of non-linearity approximation signals in accordance with the plurality of coefficients;
• and
• cancel the plurality of non-linearity approximation signals from the physical downlink shared channel communication.

A method of wireless communication performed by a network node, comprising:

• applying a precoding operation to a downlink physical channel;
• obtaining a plurality of coefficients associated with a non-linearity of the downlink physical channel in accordance with estimating a cross-correlation of a plurality of power delay profiles associated with the precoding operation;
• precoding a physical downlink shared channel communication in accordance with a result of the precoding operation;
• and
• transmitting the plurality of coefficients via a physical downlink control channel communication.

A method of wireless communication performed by a user equipment (UE), comprising:

• receiving a physical downlink shared channel communication that includes a precoding data indication;
• receiving a physical downlink control channel communication that includes a plurality of coefficients;
• generating a plurality of non-linearity approximation signals in accordance with the plurality of coefficients;
• and
• cancelling the plurality of non-linearity approximation signals from the physical downlink shared channel communication.