Patent ID: 11924015
Assignee: QUALCOMM INCORPORATED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 23:
24. An apparatus for wireless communication at a base station, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive a capability indication from a user equipment (UE) for more than one phase tracking reference signal (PT-RS) port for receiving a downlink shared channel based, both, on a first transmission configuration indication (TCI) state and a second TCI state;
configure the UE for a maximum number of downlink PT-RS ports; and
transmit PT-RS to the UE using a number of downlink PT-RS ports based on a plurality of TCI states indicated in downlink control information (DCI) from the base station, wherein the PT-RS is transmitted using more than one PT-RS port when a number of the plurality of TCI states is more than one and a number of demodulation reference signal (DMRS) code division multiplexing (CDM) groups is more than one,

wherein the at least one processor is configured to transmit the PT-RS using a first PT-RS port that corresponds to a first, lowest indexed demodulation reference signal (DMRS) port for a first transmission configuration indication (TCI) state, and is configured to transmit the PT-RS using a second PT-RS port that corresponds to a second, lowest indexed DMRS port for the second TCI state.