Phase tracking reference signal (PT-RS) power boosting

1. An apparatus of a user equipment (UE), the apparatus comprising:

processing circuitry to:

decode 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;

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

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

encode 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; and

memory coupled to the processing circuitry, the memory configured to store 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 processing circuitry is further configured to:

decode 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 a group consisting of {1; 2; 3; and 4}; and

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

5. The apparatus of claim 4 , wherein the processing circuitry is further configured to:

determine the PT-RS power boosting factor 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 downlink control information (DCI) signaling.

8. The apparatus of claim 1 , wherein the processing circuitry is further configured to:

decode downlink control information (DCI) signaling from the base station, the DCI, signaling including precoder information; and

determine a precoder for the PUSCH transmission based on the precoder information.

9. The apparatus of claim 8 , wherein the precoder information includes one or both of a Transmission Precoder Matrix Index (TPMI) and a Transmission Rank Indicator (TRI).

10. The apparatus of claim 8 , wherein the precoder is one of the following:

a coherent precoder;

a non-coherent precoder; and

a partial coherent precoder.

11. The apparatus of claim 8 , wherein the processing circuitry is further configured to:

determine the PT-RS power boosting factor further based on the determined precoder.

12. The apparatus of claim 1 , further comprising transceiver circuitry coupled to the processing circuitry; and, one or more antennas coupled to the transceiver circuitry.

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

processing circuitry to:

encode baseband signals comprising downlink control information (DCI) for transmission to a user equipment (UE), the DCI including a modulation coding scheme (MCS) index and physical uplink shared channel (PUSCH) allocation, the MCS index corresponding to a phase tracking reference signal (PT-RS) density;

decode UE capability information from the UE, the decoded HE capability information including a preferred PUSCH-to-PT-RS energy per resource element (EPRE) ratio corresponding to the PT-RS density;

encode radio resource control (RRC) signaling for transmission to the UE, the RRC signaling indicating a PUSCH-to-PT-RS EPRE ratio based on the preferred PUSCH-to-PT-RS EPRE ratio; and

decode a PT-RS received with uplink data via the PUSCH allocation, the PT-RS associated with PT-RS transmission power based on the indicated PUSCH-to-PT-RS EPRE ratio; and

memory coupled to the processing circuitry, the memory configured to store the PUSCH-to-PT-RS EPRE ratio.

14. The apparatus of claim 13 , wherein the processing circuitry is 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 use in transmitting a DM-RS, the number of DM-RS antenna ports selected from a group consisting of {1; 2; and 4}; and

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

15. The apparatus of claim 14 , wherein a PT-RS power boosting factor corresponding to the PT-RS transmission power is based on the number of DM-RS antenna ports and the number of PT-RS antenna ports.

16. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a user equipment (UE), the instructions to configure the one or more processors to cause the UE to:

decode 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;

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

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

encode 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.

17. The non-transitory computer-readable storage medium of claim 16 , wherein the instructions configure the one or more processors to cause the UE to:

decode 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 a group consisting of {1; 2; 3; and 4}; and

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

18. The non-transitory computer-readable storage medium of claim 17 , wherein the instructions configure the one or more processors to cause the UE to:

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

wherein the configuration signaling is the RRC signaling or downlink control information (DCI) signaling.

19. The non-transitory computer-readable storage medium of claim 16 , wherein the instructions configure the one or more processors to cause the UE to:

decode downlink control information (DCI) signaling from the base station, the DCI signaling including precoder information; and

determine a precoder for the PUSCH transmission based on the precoder information.

20. The non-transitory computer-readable storage medium of claim 19 , wherein the precoder information includes one or both of a Transmission Precoder Matrix Index (TPMI) and a Transmission Rank Indicator (TRI), and wherein the precoder is one of the following: a coherent precoder, a non-coherent precoder, and a partial coherent precoder.