Phase tracking reference signal (PT-RS) power boosting

1. An apparatus of a base station, the apparatus comprising:

one or more processors, configured to cause the base station to:

encode radio resource control (RRC) signaling for transmission to a user equipment (UE), the RRC signaling indicating a transmission coding scheme for a physical uplink shared channel (PUSCH) transmission and a PUSCH-to-PT-RS energy per resource element (EPRE) ratio;

encode a downlink control information (DCI) for transmission to the UE, the DCI including a modulation coding scheme (MCS) index and a PUSCH allocation;

decode a PUSCH-to-phase tracking reference signal (PT-RS) received with uplink data via the PUSCH allocation, the PT-RS associated with PT-RS transmission power based on a PT-RS power boosting factor, wherein the PT-RS power boosting factor is based on the transmission coding scheme and the PUSCH-to-PT-RS EPRE ratio.

2. The apparatus of claim 1 , wherein the RRC signaling further includes a flag enabling the PT-RS transmission.

3. The apparatus of claim 1 , wherein the PUSCH-to-PT-RS EPRE ratio is 00 or 01, and wherein the transmission coding scheme is a codebook-based uplink transmission or non-codebook-based uplink transmission.

4. The apparatus of claim 1 , wherein the one or more processors are further configured to:

encode configuration signaling for transmission to the UE, the configuration signaling indicating a number of demodulation reference signal (DM-RS) antenna ports for using to transmit the DM-RS, the number of DM-RS antenna ports selected from [1; 2; 3; or 4]; and

encode radio resource control (RRC) signaling for transmission to the UE, the RRC signaling configuring a number of PT-RS antenna ports.

5. The apparatus of claim 4 , wherein the PT-RS power boosting factor is further based on the number of DM-RS antenna ports and the number of PT-RS antenna ports.

6. The apparatus of claim 4 , wherein the configuration signaling indicates a number of PUSCH layers for the PUSCH transmission, the number of PUSCH layers corresponding to the number of DM-RS antenna ports.

7. The apparatus of claim 4 , wherein the configuration signaling is the RRC signaling or the DCI.

8. A method for operating a base station, comprising:

by the base station:

encoding radio resource control (RRC) signaling for transmission to a user equipment (UE), the RRC signaling indicating a transmission coding scheme for a physical uplink shared channel (PUSCH) transmission and a PUSCH-to-PT-RS energy per resource element (EPRE) ratio;

encoding a downlink control information (DCI) for transmission to the UE, the DCI including a modulation coding scheme (MCS) index and a PUSCH allocation;

decoding a PUSCH-to-phase tracking reference signal (PT-RS) received with uplink data via the PUSCH allocation, the PT-RS associated with PT-RS transmission power based on a PT-RS power boosting factor, wherein the PT-RS power boosting factor is based on the transmission coding scheme and the PUSCH-to-PT-RS EPRE ratio.

9. The method of claim 8 , wherein the RRC signaling further includes a flag enabling the PT-RS transmission.

10. The method of claim 8 , wherein the PUSCH-to-PT-RS EPRE ratio is 00 or 01, and wherein the transmission coding scheme is a codebook-based uplink transmission or non-codebook-based uplink transmission.

11. The method of claim 8 , further comprising:

encoding configuration signaling for transmission to the UE, the configuration signaling indicating a number of demodulation reference signal (DM-RS) antenna ports for using to transmit the DM-RS, the number of DM-RS antenna ports selected from [1; 2; 3; or 4]; and

encoding radio resource control (RRC) signaling for transmission to the UE, the RRC signaling configuring a number of PT-RS antenna ports.

12. The method of claim 11 , wherein the PT-RS power boosting factor is further based on the number of DM-RS antenna ports and the number of PT-RS antenna ports.

13. The method of claim 11 , wherein the configuration signaling indicates a number of PUSCH layers for the PUSCH transmission, the number of PUSCH layers corresponding to the number of DM-RS antenna ports.

14. The method of claim 11 , wherein the configuration signaling is the RRC signaling or the DCI.

15. A method for operating a user equipment (UE), comprising:

by the UE:

decoding baseband signals comprising radio resource control (RRC) signaling from a base station, the RRC signaling indicating a transmission coding scheme for a physical uplink shared channel (PUSCH) transmission;

determining a PUSCH-to-phase tracking reference signal (PT-RS) energy per resource element (EPRE) ratio using the RRC signaling;

determining a PT-RS power boosting factor based on the transmission coding scheme and the PUSCH-to-PT-RS EPRE ratio; and

encoding a PT-RS for transmission using a plurality of PT-RS symbols, the PT-RS transmission using increased transmission power corresponding to the PT-RS power boosting factor.

16. The method of claim 15 , wherein the RRC signaling further includes a flag enabling the PT-RS transmission.

17. The method of claim 15 , wherein the PUSCH-to-PT-RS EPRE ratio is 00 or 01, and wherein the transmission coding scheme is a codebook-based uplink transmission or non-codebook-based uplink transmission.

18. The method of claim 15 , further comprising:

decoding configuration signaling from the base station, the configuration signaling indicating a number of demodulation reference signal (DM-RS) antenna ports for using to transmit the DM-RS, the number of DM-RS antenna ports selected from [1; 2; 3; or 4]; and

decoding radio resource control (RRC) signaling from the base station, the RRC signaling configuring a number of PT-RS antenna ports.

19. The method of claim 18 , further comprising:

determining the PT-RS power boosting factor further based on the number of DM-RS antenna ports and the number of PT-RS antenna ports.

20. The method of claim 18 , wherein the configuration signaling indicates a number of PUSCH layers for the PUSCH transmission, the number of PUSCH layers corresponding to the number of DM-RS antenna ports.

21. The method of claim 18 , wherein the configuration signaling is the RRC signaling or downlink control information (DCI) signaling.