Techniques for configuring phase tracking reference signal transmissions

A method for wireless communication at a base station, comprising:

• transmitting, to a user equipment (UE), control signaling indicating a set of phase tracking reference signal patterns and scheduling transmission of a downlink message during a transmission time interval;
• transmitting, based at least in part on transmitting the control signaling, a first one or more phase tracking reference signals according to a first pattern of the set of phase tracking reference signal patterns in a first portion of the transmission time interval;
• transmitting, based at least in part on transmitting the control signaling, a second one or more phase tracking reference signals according to a second pattern of the set of phase tracking reference signal patterns in a second portion of the transmission time interval;
• and
• transmitting the downlink message in accordance with the control signaling.

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

• a processor;
• and
• a memory coupled with the processor, wherein the memory comprises instructions executable by the processor to cause the apparatus to:
• receive control signaling indicating a set of phase tracking reference signal patterns and scheduling transmission of a downlink message during a transmission time interval;
• monitor, based at least in part on receiving the control signaling, for a first one or more phase tracking reference signals according to a first pattern of the set of phase tracking reference signal patterns in a first portion of the transmission time interval;
• monitor, based at least in part on receiving the control signaling, for a second one or more phase tracking reference signals according to a second pattern of the set of phase tracking reference signal patterns in a second portion of the transmission time interval;
• and
• monitor, in accordance with the control signaling, the transmission time interval for the downlink message based at least in part on a phase estimate determined using the first one or more phase tracking reference signals and the second one or more phase tracking reference signals.

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

• a processor;
• and
• a memory coupled with the processor, wherein the memory comprises instructions executable by the processor to cause the apparatus to:
• transmit, to a user equipment (UE), control signaling indicating a set of phase tracking reference signal patterns and scheduling transmission of a downlink message during a transmission time interval;
• transmit, based at least in part on transmitting the control signaling, a first one or more phase tracking reference signals according to a first pattern of the set of phase tracking reference signal patterns in a first portion of the transmission time interval;
• transmit, based at least in part on transmitting the control signaling, a second one or more phase tracking reference signals according to a second pattern of the set of phase tracking reference signal patterns in a second portion of the transmission time interval;
• and
• transmit the downlink message in accordance with the control signaling.