Phase tracking reference signal design for single-carrier waveform with multiple data layers

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

• a memory;
• and
• one or more processors, coupled to the memory, configured to:
• receive, from a user equipment (UE), information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for a plurality of layers of a single-carrier communication;
• transmit, to the UE, a phase tracking reference signal (PTRS) configuration for the plurality of layers based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration;
• and
• perform the single-carrier communication in accordance with the PTRS configuration.

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

• transmitting, to a base station, information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for a plurality of layers of a single-carrier communication;
• receiving, from the base station, a phase tracking reference signal (PTRS) configuration for the plurality of layers based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration;
• and
• performing the single-carrier communication in accordance with the PTRS configuration.

A method of wireless communication performed by a base station, comprising:

• receiving, from a user equipment (UE), information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for a plurality of layers of a single-carrier communication;
• transmitting, to the UE, a phase tracking reference signal (PTRS) configuration for the plurality of layers based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration;
• and
• performing the single-carrier communication in accordance with the PTRS configuration.