Uplink reference signal-based frequency offset pre-compensation

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

receiving a configuration signal indicating a weighting factor to be applied to a first frequency offset, a second frequency offset, or both, wherein the first frequency offset is associated with transmissions between the UE and a first base station and the second frequency offset is associated with transmissions between the UE and a second base station;

determining, based at least in part on a first downlink reference signal transmitted from the first base station using a downlink reference signal frequency, the first frequency offset;

determining, based at least in part on a second downlink reference signal transmitted from the second base station using the downlink reference signal frequency, the second frequency offset;

transmitting, to the first base station and the second base station, at least one uplink reference signal using an uplink reference signal frequency that is based at least in part on the first frequency offset, the second frequency offset, and the weighting factor; and

receiving a downlink data transmission from the first base station or the second base station at a receive frequency that is based at least in part on the uplink reference signal frequency.

2. The method of claim 1 , further comprising:

receiving a configuration signal identifying the downlink reference signal frequency.

3. The method of claim 1 , further comprising:

transmitting, autonomously by the UE, the uplink reference signal using the uplink reference signal frequency in response to determining the first frequency offset and the second frequency offset.

4. The method of claim 1 , further comprising:

receiving a trigger message triggering transmission of the uplink reference signal using the uplink reference signal frequency.

5. The method of claim 1 , further comprising:

identifying a first uplink spatial filter configuration for transmitting the at least one uplink reference signal to the first base station based at least in part on a first downlink spatial filter configuration associated with the first downlink reference signal and a second downlink spatial filter configuration associated with the second downlink reference signal; and

transmitting the uplink reference signal to the first base station to the second base station, or both, based at least in part on the first uplink spatial filter configuration.

6. The method of claim 5 , wherein the first downlink spatial filter configuration, the second downlink spatial filter configuration, or both, are identified based at least in part on a downlink transmission configuration indicator (TCI).

7. The method of claim 5 , wherein the first uplink spatial filter configuration is associated with the first downlink spatial filter configuration and the second downlink spatial filter configuration based at least in part on a spatial relation information indication, an uplink transmission configuration indicator (TCI), or both.

8. The method of claim 1 , further comprising:

receiving a grant scheduling the downlink data transmission; and

identifying a spatial filter configuration for a demodulation reference signal transmitted in conjunction with the downlink data transmission based at least in part on the grant.

9. The method of claim 1 , further comprising:

determining a weighted average of the first frequency offset and the second frequency offset; and

identifying the uplink reference signal frequency based at least in part on the weighted average.

10. A method for wireless communication at a first base station, comprising:

transmitting, to a user equipment (UE), a first downlink reference signal using a downlink reference signal frequency;

transmitting, to the UE, a configuration signal indicating a weighting factor to be applied to a first frequency offset, a second frequency offset, or both, wherein the first frequency offset is associated with transmissions between the UE and the first base station and the second frequency offset is associated with transmissions between the UE and a second base station;

receiving, from the UE, at least one uplink reference signal using an uplink reference signal frequency that is based at least in part on the first frequency offset, the second frequency offset, and the weighting factor; and

transmitting a downlink data transmission to the UE at a receive frequency for the UE that is based at least in part on the uplink reference signal frequency.

11. The method of claim 10 , further comprising:

transmitting a configuration signal identifying the downlink reference signal frequency.

12. The method of claim 10 , wherein the UE autonomously transmits the uplink reference signal using the uplink reference signal frequency in response to the UE determining the first frequency offset and the second frequency offset.

13. The method of claim 10 , further comprising:

transmitting, to the UE, a trigger message triggering transmission of the uplink reference signal using the uplink reference signal frequency.

14. An apparatus for wireless communication at a user equipment (UE), comprising:

a processor,

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive a configuration signal indicating a weighting factor to be applied to a first frequency offset, a second frequency offset, or both, wherein the first frequency offset is associated with transmissions between the UE and a first base station and the second frequency offset is associated with transmissions between the UE and a second base station;

determine, based at least in part on a first downlink reference signal transmitted from the first base station using a downlink reference signal frequency, the first frequency offset;

determine, based at least in part on a second downlink reference signal transmitted from the second base station using the downlink reference signal frequency, the second frequency offset;

transmit, to the first base station and the second base station, at least one uplink reference signal using an uplink reference signal frequency that is based at least in part on the first frequency offset, the second frequency offset, and the weighting factor; and

receive a downlink data transmission from the first base station or the second base station at a receive frequency that is based at least in part on the uplink reference signal frequency.

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

receive a configuration signal identifying the downlink reference signal frequency.

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

transmit, autonomously by the UE, the uplink reference signal using the uplink reference signal frequency in response to determining the first frequency offset and the second frequency offset.

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

receive a trigger message triggering transmission of the uplink reference signal using the uplink reference signal frequency.

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

identify a first uplink spatial filter configuration for transmitting the at least one uplink reference signal to the first base station based at least in part on a first downlink spatial filter configuration associated with the first downlink reference signal and a second downlink spatial filter configuration associated with the second downlink reference signal; and

transmit the uplink reference signal to the first base station, to the second base station, or both, based at least in part on the first uplink spatial filter configuration.

19. The apparatus of claim 18 , wherein the first downlink spatial filter configuration, the second downlink spatial filter configuration, or both, are identified based at least in part on a downlink transmission configuration indicator (TCI).

20. The apparatus of claim 18 , wherein the first uplink spatial filter configuration is associated with the first downlink spatial filter configuration and the second downlink spatial filter configuration based at least in part on a spatial relation information indication, an uplink transmission configuration indicator (TCI), or both.

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

receive a grant scheduling the downlink data transmission; and

identify a spatial filter configuration for a demodulation reference signal transmitted in conjunction with the downlink data transmission based at least in part on the grant.

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

determine a weighted average of the first frequency offset and the second frequency offset; and

identify the uplink reference signal frequency based at least in part on the weighted average.

23. An apparatus for wireless communication at a first base station, comprising:

a processor,

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit, to a user equipment (UE), a first downlink reference signal using a downlink reference signal frequency;

transmit, to the UE, a configuration signal indicating a weighting factor to be applied to a first frequency offset, a second frequency offset, or both, wherein the first frequency offset is associated with transmissions between the UE and the first base station and the second frequency offset is associated with transmissions between the UE and a second base station;

receive, from the UE, at least one uplink reference signal using an uplink reference signal frequency that is based at least in part on the first frequency offset, the second frequency offset, and the weighting factor; and

transmit a downlink data transmission to the UE at a receive frequency for the UE that is based at least in part on the uplink reference signal frequency.

24. The apparatus of claim 23 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit a configuration signal identifying the downlink reference signal frequency.