Phase-noise compensation reference signal configuration reporting and signaling

1. A method for wireless communication at a user equipment (UE), comprising:

identifying, by the UE, a capability of the UE to receive signals in a communications system using carrier frequencies greater than 6 GHz;

determining, by the UE, a phase-noise compensation reference signal (PCRS) configuration based at least in part on the identified capability; and

transmitting, to a base station via radio resource control (RRC) signaling, a reporting message comprising an indication of the determined PCRS configuration.

2. The method of claim 1 , further comprising:

determining a resource mapping pattern for one or more PCRS, wherein the PCRS configuration comprises the determined resource mapping pattern.

3. The method of claim 1 , further comprising:

determining a number of PCRS ports used for PCRS, wherein the PCRS configuration comprises the determined number of PCRS ports.

4. The method of claim 1 , further comprising:

determining a multiplexing scheme used for one or more PCRS ports, wherein the PCRS configuration comprises the determined multiplexing scheme.

5. The method of claim 4 , wherein the multiplexing scheme comprises a PCRS precoder corresponding to the one or more PCRS ports.

6. The method of claim 5 , wherein the one or more PCRS ports are mapped to respective demodulation reference signal (DMRS) ports.

7. The method of claim 4 , wherein the multiplexing scheme comprises one or both of the one or more PCRS ports multiplexed onto a single resource or a single PCRS port multiplexed over a set of resources.

8. The method of claim 1 , further comprising:

determining a phase noise estimation capability, wherein the PCRS configuration comprises the determined phase noise estimation capability.

9. The method of claim 8 , further comprising:

identifying a first channel estimate corresponding to a first set of DMRS ports;

identifying a second channel estimate corresponding to a second set of DMRS ports;

generating a superposed channel based at least in part on the first channel estimate and the second channel estimate; and

estimating a phase noise based at least in part on the generated superposed channel and a PCRS multiplexed onto a single resource, wherein the PCRS is precoded with a same precoder used for a downlink reference signal comprising a DMRS or a UE-specific reference signal (VERS).

10. The method of claim 1 , further comprising:

receiving, from the base station, a message comprising an indication of an uplink PCRS configuration, wherein the uplink PCRS configuration comprises a resource mapping pattern for transmitting PCRS; and

transmitting, to the base station, one or more PCRS based at least in part on the received indication.

11. The method of claim 1 , further comprising:

determining an uplink PCRS configuration, wherein the uplink PCRS configuration comprises a resource mapping pattern for transmitting PCRS;

transmitting, to the base station via second RRC signaling, a second reporting message comprising an indication of the determined uplink PCRS configuration; and

transmitting, to the base station, one or more PCRS based at least in part on the determined uplink PCRS configuration.

12. The method of claim 1 , further comprising:

receiving a PCRS from the base station in response to the transmitted reporting message.

13. An apparatus for wireless communication at a user equipment (UE) in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

identify, by the UE, a capability of the UE to receive signals in a communications system using carrier frequencies greater than 6 GHz;

determine, by the UE, a phase-noise compensation reference signal (PCRS) configuration based at least in part on the identified capability; and

transmit, to a base station via radio resource control (RRC) signaling, a reporting message comprising an indication of the determined PCRS configuration.

14. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine a resource mapping pattern for one or more PCRS, wherein the PCRS configuration comprises the determined resource mapping pattern.

15. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine a number of PCRS ports used for PCRS, wherein the PCRS configuration comprises the determined number of PCRS ports.

16. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine a multiplexing scheme used for one or more PCRS ports, wherein the PCRS configuration comprises the determined multiplexing scheme.

17. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine a phase noise estimation capability, wherein the PCRS configuration comprises the determined phase noise estimation capability.

18. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive, from the base station, a message comprising an indication of an uplink PCRS configuration, wherein the uplink PCRS configuration comprises a resource mapping pattern for transmitting PCRS; and

transmit, to the base station, one or more PCRS based at least in part on the received indication.

19. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine an uplink PCRS configuration, wherein the uplink PCRS configuration comprises a resource mapping pattern for transmitting PCRS;

transmit, to the base station via second RRC signaling, a second reporting message comprising an indication of the determined uplink PCRS configuration; and

transmit, to the base station, one or more PCRS based at least in part on the determined uplink PCRS configuration.