Demodulation reference signaling with varying transmit power
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a first resource within a slot and a second resource within the slot. The UE may receive a demodulation reference signal (DMRS) based at least in part on the first resource, wherein the DMRS is associated with a first transmit power. The UE may receive an additional DMRS based at least in part on the second resource, wherein the additional DMRS is associated with a second transmit power different from the first transmit power. Numerous other aspects are described.
1. An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive a configuration of a first resource within a slot and a second resource within the slot;
receive a demodulation reference signal (DMRS) based at least in part on the first resource, wherein the DMRS is associated with a first transmit power; and
receive an additional DMRS based at least in part on the second resource, wherein the additional DMRS is associated with a second transmit power different from the first transmit power.
2. The apparatus of claim 1 , wherein the one or more processors are further configured to receive a data transmission in the slot, wherein the data transmission is associated with a third transmit power, wherein the first transmit power is at least as great as the third transmit power, and wherein the second transmit power is less than the third transmit power.
3. The apparatus of claim 2 , wherein the one or more processors are further configured to:
perform a nonlinear channel estimation based at least in part on the DMRS; and
perform a linear channel estimation based at least in part on the additional DMRS.
4. The apparatus of claim 3 , wherein the one or more processors are further configured to perform digital post distortion processing on the data transmission based at least in part on the nonlinear channel estimation.
5. The apparatus of claim 1 , wherein the configuration is indicated by at least one of a downlink control information (DCI) communication or a medium access control (MAC) control element (CE) communication.
6. The apparatus of claim 1 , wherein the second resource is a linear DMRS resource.
7. The apparatus of claim 6 , wherein the linear DMRS resource is associated with a nonlinear distortion level threshold.
8. The apparatus of claim 6 , wherein the one or more processors are further configured to transmit, to a base station, an indication of a requested nonlinear distortion level associated with the linear DMRS resource.
9. The apparatus of claim 8 , wherein the one or more processors are further configured to receive, from the base station, an indication of whether a measured nonlinear distortion level associated with the linear DMRS resource is below the requested nonlinear distortion level.
10. The apparatus of claim 9 , wherein the indication of whether the measured nonlinear distortion level is below the requested nonlinear distortion level is received via:
one of a downlink control information (DCI) communication, a medium access control (MAC) control element (CE) communication, or a radio resource control (RRC) communication associated with a downlink communication, or
one of a physical uplink control channel (PUCCH) communication or a MAC CE communication associated with an uplink communication.
11. An apparatus for wireless communication at a network entity, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit a configuration of a first resource within a slot and a second resource within the slot; and
transmit a demodulation reference signal (DMRS) based at least in part on the first resource, wherein the DMRS is transmitted using a first transmit power; and
transmit an additional DMRS based at least in part on the second resource, wherein the additional DMRS is transmitted using a second transmit power different from the first transmit power.
12. The apparatus of claim 11 , wherein the one or more processors are further configured to transmit a data transmission in the slot, wherein the data transmission is transmitted using a third transmit power, wherein the first transmit power is at least as great as the third transmit power, and wherein the second transmit power is less than the third transmit power.
13. The apparatus of claim 11 , wherein the configuration is indicated by at least one of a downlink control information (DCI) communication or a medium access control (MAC) control element (CE) communication.
14. The apparatus of claim 11 , wherein the second resource is a linear DMRS resource.
15. The apparatus of claim 14 , wherein the linear DMRS resource is associated with a nonlinear distortion level threshold.
16. The apparatus of claim 14 , wherein the one or more processors are further configured to receive an indication of a requested nonlinear distortion level associated with the linear DMRS resource.
17. The apparatus of claim 16 , wherein the one or more processors are further configured to transmit an indication of whether a measured nonlinear distortion level associated with the linear DMRS resource is below the requested nonlinear distortion level.
18. The apparatus of claim 17 , wherein the indication of whether the measured nonlinear distortion level is below the requested nonlinear distortion level is transmitted via:
one of a downlink control information (DCI) communication, a medium access control (MAC) control element (CE) communication, or a radio resource control (RRC) communication associated with a downlink communication, or
one of a physical uplink control channel (PUCCH) communication or a MAC CE communication associated with an uplink communication.
19. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a configuration of a first resource within a slot and a second resource within the slot;
receiving a demodulation reference signal (DMRS) based at least in part on the first resource, wherein the DMRS is associated with a first transmit power; and
receiving an additional DMRS based at least in part on the second resource, wherein the additional DMRS is associated with a second transmit power different from the first transmit power.
20. The method of claim 19 , further comprising receiving a data transmission in the slot, wherein the data transmission is associated with a third transmit power, wherein the first transmit power is at least as great as the third transmit power, and wherein the second transmit power is less than the third transmit power.
21. The method of claim 20 , further comprising:
performing a nonlinear channel estimation based at least in part on the DMRS; and
performing a linear channel estimation based at least in part on the additional DMRS.
22. The method of claim 21 , further comprising performing digital post distortion processing on the data transmission based at least in part on the nonlinear channel estimation.
23. The method of claim 19 , wherein the second resource is a linear DMRS resource.
24. The method of claim 23 , wherein the linear DMRS resource is associated with a nonlinear distortion level threshold.
25. The method of claim 23 , further comprising transmitting, to a network entity, an indication of a requested nonlinear distortion level associated with the linear DMRS resource.
26. The method of claim 25 , further comprising receiving, from the network entity, an indication of whether a measured nonlinear distortion level associated with the linear DMRS resource is below the requested nonlinear distortion level.
27. A method of wireless communication performed by a network entity, comprising:
transmitting a configuration of a first resource within a slot and a second resource within the slot; and
transmitting a demodulation reference signal (DMRS) based at least in part on the first resource, wherein the DMRS is transmitted using a first transmit power; and
transmitting an additional DMRS based at least in part on the second resource, wherein the additional DMRS is transmitted using a second transmit power different from the first transmit power.
28. The method of claim 27 , further comprising transmitting a data transmission in the slot, wherein the data transmission is transmitted using a third transmit power, wherein the first transmit power is at least as great as the third transmit power, and wherein the second transmit power is less than the third transmit power.
29. The method of claim 27 , wherein the second resource is a linear DMRS resource.
30. The method of claim 29 , wherein the linear DMRS resource is associated with a nonlinear distortion level threshold.