Reference signal design
Certain aspects of the present disclosure relate to methods and apparatus for generating and communicating reference signals. Certain aspects provide a method for communicating reference signals. The method includes selecting a demodulation reference sequence (DMRS) of a plurality of DMRSs for transmission in a synchronization signal block (SSB) based on a half-frame in which the SSB is transmitted. The method further includes transmitting the selected DMRS in the SSB.
1. A method for communicating reference signals, the method comprising:
selecting a demodulation reference sequence (DMRS) of a plurality of DMRSs for transmission in a synchronization signal block (SSB) based on a half-frame in which the SSB is transmitted; and
transmitting the selected DMRS in the SSB.
2. The method of claim 1 , wherein the half-frame is part of a system frame.
3. The method of claim 1 , wherein the SSB is one of a plurality of SSBs in a synchronization signal (SS) burst set comprising four SSBs.
4. The method of claim 1 , wherein the SSB includes a physical broadcast channel (PBCH).
5. The method of claim 1 , wherein selecting the DMRS is further based on an index of the SSB.
6. The method of claim 3 , wherein selecting the DMRS is further based on an index of the SSB.
7. The method of claim 6 , wherein each of the plurality of SSBs is transmitted on a separate spatial beam.
8. A wireless device comprising:
a memory; and
a process configured to:
select a demodulation reference sequence (DMRS) of a plurality of DMRSs for transmission in a synchronization signal block (SSB) based on a half-frame in which the SSB is transmitted; and
transmit the selected DMRS in the SSB.
9. The wireless device of claim 8 , wherein the half-frame is part of a system frame.
10. The wireless device of claim 8 , wherein the SSB is one of a plurality of SSBs in a synchronization signal (SS) burst set comprising four SSBs.
11. The wireless device of claim 8 , wherein the SSB includes a physical broadcast channel (PBCH).
12. The wireless device of claim 8 , wherein selecting the DMRS is further based on an index of the SSB.
13. The wireless device of claim 10 , wherein selecting the DMRS is further based on an index of the SSB.
14. The wireless device of claim 13 , wherein each of the plurality of SSBs is transmitted on a separate spatial beam.
15. A wireless device comprising:
means for selecting a demodulation reference sequence (DMRS) of a plurality of DMRSs for transmission in a synchronization signal block (SSB) based on a half-frame in which the SSB is transmitted; and
means for transmitting the selected DMRS in the SSB.
16. The wireless device of claim 15 , wherein the half-frame is part of a system frame.
17. The wireless device of claim 15 , wherein the SSB is one of a plurality of SSBs in a synchronization signal (SS) burst set comprising four SSBs.
18. The wireless device of claim 15 , wherein the SSB includes a physical broadcast channel (PBCH).
19. The wireless device of claim 15 , wherein selecting the DMRS is further based on an index of the SSB.
20. The wireless device of claim 17 , wherein selecting the DMRS is further based on an index of the SSB.
21. The wireless device of claim 20 , wherein each of the plurality of SSBs is transmitted on a separate spatial beam.
22. A non-transitory computer readable storage medium that stores instructions that when executed by a wireless device cause the wireless device to perform a method for communicating reference signals, the method comprising:
selecting a demodulation reference sequence (DMRS) of a plurality of DMRSs for transmission in a synchronization signal block (SSB) based on a half-frame in which the SSB is transmitted; and
transmitting the selected DMRS in the SSB.
23. The non-transitory computer readable storage medium of claim 22 , wherein the half-frame is part of a system frame.
24. The non-transitory computer readable storage medium of claim 22 , wherein the SSB is one of a plurality of SSBs in a synchronization signal (SS) burst set comprising four SSBs.
25. The non-transitory computer readable storage medium of claim 22 , wherein the SSB includes a physical broadcast channel (PBCH).
26. The non-transitory computer readable storage medium of claim 22 , wherein selecting the DMRS is further based on an index of the SSB.
27. The non-transitory computer readable storage medium of claim 24 , wherein selecting the DMRS is further based on an index of the SSB.
28. The non-transitory computer readable storage medium of claim 27 , wherein each of the plurality of SSBs is transmitted on a separate spatial beam.