Non-coherent joint transmission techniques

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

receiving, at the UE, a non-coherent joint transmission including at least a first transmission from a first transmit point associated with a first demodulation reference signal (DMRS) and a second transmission from a second transmit point associated with a second DMRS orthogonal to the first DMRS, the first transmission and the second transmission received on overlapping sets of frequency resources; and

processing the first transmission and the second transmission according to a set of receive parameters defined for separate component carriers (CCs).

2. The method of claim 1 , further comprising:

receiving at least one of: independent resource allocations for the first transmission and the second transmission, independent scheduling decisions for the first transmission and the second transmission, or a combination thereof.

3. The method of claim 1 , further comprising:

receiving the first transmission and the second transmission using a same receive chain.

4. The method of claim 1 , further comprising:

receiving one codeword or two codewords in each of the first transmission and the second transmission.

5. The method of claim 1 , further comprising:

receiving the first transmission in accordance with a first resource allocation; and

receiving the second transmission in accordance with a second resource allocation, wherein the first resource allocation and the second resource allocation are non-aligned.

6. The method of claim 1 , wherein the processing of the first transmission and the second transmission comprises:

jointly processing the first transmission and the second transmission.

7. The method of claim 6 , further comprising:

sampling the non-coherent joint transmission;

performing a single Fourier transform on a set of samples of the non-coherent joint transmission; and

de-mapping the first transmission and the second transmission from the single Fourier transform.

8. The method of claim 1 , wherein the processing of the first transmission and the second transmission comprises:

separately processing the first transmission and the second transmission.

9. The method of claim 8 , further comprising:

sampling the non-coherent joint transmission;

performing, for the first transmission, a first Fourier transform on a first set of samples of the non-coherent joint transmission;

performing, for the second transmission, a second Fourier transform on a second set of samples of the non-coherent joint transmission, wherein the second set differs from the first set; and

separately de-mapping the first transmission from the first Fourier transform and the second transmission from the second Fourier transform.

10. The method of claim 1 , further comprising:

determining to process the first transmission and the second transmission jointly or separately based at least in part on: a configuration of the non-coherent joint transmission, or an indication received from the first transmit point or the second transmit point.

11. The method of claim 1 , further comprising:

receiving the first DMRS and the second DMRS as part of the first transmission and the second transmission, the first and second DMRSs based at least in part on: a multi-user multiple input multiple output (MU-MIMO) DMRS configuration, a frequency domain multiplexed DMRS configuration, or a code division multiplexed (CDM) DMRS configuration.

12. The method of claim 1 , wherein the first transmission and the second transmission are associated with a same virtual cell identity (VCI) or different VCIs.

13. The method of claim 1 , further comprising:

managing a first channel state information (CSI) process for a first resource allocation associated with the first transmit point; and

managing a second CSI process for a second resource allocation associated with the second transmit point.

14. The method of claim 1 , further comprising:

managing a joint channel state information (CSI) process for a same resource allocation associated with the first transmit point and the second transmit point.

15. The method of claim 14 , wherein the management of the joint CSI process comprises:

managing a first component CSI process associated with the first transmit point, wherein the first component CSI process carries a first CSI report conditioned on a second CSI report; and

managing a second component CSI process associated with the second transmit point, wherein the second component CSI process carries the second CSI report conditioned on the first CSI report.

16. The method of claim 1 , further comprising:

monitoring for downlink control information (DCI) in a first physical downlink control channel (PDCCH) region associated with the first transmit point, and in a second PDCCH region associated with the second transmit point.

17. The method of claim 16 , wherein the first transmit point and the second transmit point are associated with different cell identities, and the first PDCCH region and the second PDCCH region include overlapping sets of resources.

18. The method of claim 16 , wherein the first transmit point and the second transmit point are associated with a same cell identity, and the first PDCCH region and the second PDCCH region include different sets of resources.

19. The method of claim 1 , further comprising:

triggering a transmission of a sounding reference signal (SRS) based at least in part on first downlink control information (DCI) received from the first transmit point; and

refraining from triggering transmission of the SRS based at least in part on second DCI received from the second transmit point.

20. The method of claim 1 , further comprising:

triggering a transmission of a sounding reference signal (SRS) based at least in part on: first downlink control information (DCI) received from the first transmit point, second DCI received from the second transmit point, or a combination thereof.

21. The method of claim 20 , further comprising:

transmitting the SRS based at least in part on: a first set of SRS parameters associated with the first transmit point when the SRS is triggered based at least in part on the first DCI, a second set of SRS parameters associated with the second transmit point when the SRS is triggered based at least in part on the second DCI, or a same set of SRS parameters associated with the first transmit point and the second transmit point when the SRS is triggered based at least in part on the first DCI and the second DCI.

22. The method of claim 1 , further comprising:

receiving at least one uplink grant for an uplink transmission on a single uplink channel, the at least one uplink grant comprising: a first uplink grant received from the first transmit point, a second uplink grant received from the second transmit point, or a combination thereof.

23. The method of claim 22 , wherein the first uplink grant and the second uplink grant are received and have a same content.

24. The method of claim 1 , further comprising:

transmitting a second non-coherent joint transmission including at least a third transmission to the first transmit point and a fourth transmission to the second transmit point.

25. The method of claim 24 , further comprising:

processing the third transmission and the fourth transmission using different precoders.

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

means for receiving, at the UE, a non-coherent joint transmission including at least a first transmission from a first transmit point associated with a first demodulation reference signal (DMRS) and a second transmission from a second transmit point associated with a second DMRS orthogonal to the first DMRS, the first transmission and the second transmission received on overlapping sets of frequency resources; and

means for processing the first transmission and the second transmission according to a set of receive parameters defined for separate component carriers (CCs) in a carrier aggregation (CA) mode.

27. The apparatus of claim 26 , further comprising:

means for receiving at least one of: independent resource allocations for the first transmission and the second transmission, independent scheduling decisions for the first transmission and the second transmission, or a combination thereof.

28. The apparatus of claim 26 , further comprising:

means for receiving the first transmission and the second transmission using a same receive chain.

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

a processor; and

memory in electronic communication with the processor;

the processor and the memory configured to:

receive, at the UE, a non-coherent joint transmission including at least a first transmission from a first transmit point associated with a first demodulation reference signal (DMRS) and a second transmission from a second transmit point associated with a second DMRS orthogonal to the first DMRS, the first transmission and the second transmission received on overlapping sets of frequency resources; and

process the first transmission and the second transmission according to a set of receive parameters defined for separate component carriers (CCs) in a carrier aggregation (CA) mode.

30. A non-transitory computer-readable medium storing computer-executable code for wireless communication at a user equipment (UE), the code executable by a processor to:

receive, at the UE, a non-coherent joint transmission including at least a first transmission from a first transmit point associated with a first demodulation reference signal (DMRS) and a second transmission from a second transmit point associated with a second DMRS orthogonal to the first DMRS, the first transmission and the second transmission received on overlapping sets of frequency resources; and

process the first transmission and the second transmission according to a set of receive parameters defined for separate component carriers (CCs) in a carrier aggregation (CA) mode.