Synchronization signal block design using a single carrier quadrature amplitude modulation waveform
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a synchronization signal block (SSB) transmitted using a single carrier quadrature amplitude modulation (SC-QAM) waveform, wherein the SSB has a uniform bandwidth allocation for each of a primary synchronization signal (PSS) included in the SSB, a secondary synchronization signal (SSS) included in the SSB, and physical broadcast channel (PBCH) data included in the SSB. The UE may perform initial channel access based at least in part on the SSB. Numerous other aspects are described.
1. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive a synchronization signal block (SSB) transmitted using a single carrier quadrature amplitude modulation (SC-QAM) waveform, wherein:
the SSB has a uniform bandwidth allocation for each of a primary synchronization signal (PSS) included in the SSB, a secondary synchronization signal (SSS) included in the SSB, and physical broadcast channel (PBCH) data included in the SSB; and
the SSB includes one symbol that includes a first portion of the PBCH data, and one symbol that includes a PBCH demodulation reference signal (DMRS) and a second portion of the PBCH data; and
perform initial channel access based at least in part on the SSB.
2. The UE of claim 1 , wherein the SSS is used as a reference signal for at least one of channel estimation for the PBCH data or frequency error correction for the PBCH data.
3. The UE of claim 1 , wherein the SSB has a uniform bandwidth allocation for the PSS, the SSS, the PBCH data, and the PBCH DMRS included in the SSB.
4. The UE of claim 1 , wherein the SSB includes one symbol that includes the PSS, one symbol that includes the SSS, and four symbols that include the PBCH data.
5. The UE of claim 1 , wherein a first-occurring symbol of the SSB includes the PSS, a second-occurring symbol of the SSB includes the SSS, and a third-occurring symbol, a fourth-occurring symbol, a fifth-occurring symbol, and a sixth-occurring symbol of the SSB include the PBCH data.
6. The UE of claim 5 , wherein a seventh-occurring symbol of the SSB includes a second PBCH DMRS.
7. The UE of claim 5 , wherein each of the third-occurring symbol, the fourth-occurring symbol, the fifth-occurring symbol, and the sixth-occurring symbol of the SSB includes a corresponding PBCH DMRS.
8. The UE of claim 7 , wherein each corresponding PBCH DMRS is separated from PBCH data, in a corresponding symbol, by a gap.
9. The UE of claim 1 , wherein the SSB further includes one symbol that includes the PSS and the SSS.
10. The UE of claim 9 , wherein a first-occurring symbol of the SSB includes the PSS and the SSS, a second-occurring symbol of the SSB includes the first portion of the PBCH data, and a third-occurring symbol of the SSB includes the PBCH DMRS and the second portion of the PBCH data.
11. The UE of claim 1 , wherein the SSB includes one symbol that includes the PSS, the SSS, and the first portion of the PBCH data.
12. The UE of claim 11 , wherein a first-occurring symbol of the SSB includes the PSS, the SSS, and the first portion of the PBCH data, and a second-occurring symbol of the SSB includes the PBCH DMRS and the second portion of the PBCH data.
13. The UE of claim 1 , wherein the SSB includes a symbol that includes the PSS, the SSS, and the second portion of the PBCH data.
14. The UE of claim 13 , wherein the symbol further includes the PBCH DMRS.
15. A base station for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit a synchronization signal block (SSB) using a single carrier quadrature amplitude modulation (SC-QAM) waveform, wherein:
the SSB has a uniform bandwidth allocation for each of a primary synchronization signal (PSS) included in the SSB, a secondary synchronization signal (SSS) included in the SSB, and physical broadcast channel (PBCH) data included in the SSB; and
the SSB includes one symbol that includes a first portion of the PBCH data, and one symbol that includes a PBCH demodulation reference signal (DMRS) and a second portion of the PBCH data; and
perform initial channel access based at least in part on the SSB.
16. The base station of claim 15 , wherein the SSB has a uniform bandwidth allocation for the PSS, the SSS, the PBCH data, and the PBCH DMRS included in the SSB.
17. The base station of claim 15 , wherein the SSB includes one symbol that includes the PSS, one symbol that includes the SSS, and four symbols that include the PBCH data.
18. The base station of claim 15 , wherein the SSB includes one symbol that includes the PSS and the SSS.
19. The base station of claim 15 , wherein the SSB includes one symbol that includes the PSS, the SSS, and the first portion of the PBCH data.
20. The base station of claim 15 , wherein the SSB includes a symbol that includes the PSS, the SSS, and the second portion of the PBCH data.
21. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a synchronization signal block (SSB) transmitted using a single carrier quadrature amplitude modulation (SC-QAM) waveform, wherein:
the SSB has a uniform bandwidth allocation for each of a primary synchronization signal (PSS) included in the SSB, a secondary synchronization signal (SSS) included in the SSB, and physical broadcast channel (PBCH) data included in the SSB; and
the SSB includes one symbol that includes a first portion of the PBCH data, and one symbol that includes a PBCH demodulation reference signal (DMRS) and a second portion of the PBCH data; and
performing initial channel access based at least in part on the SSB.
22. The method of claim 21 , wherein the SSS is used as a reference signal for at least one of channel estimation for the PBCH data or frequency error correction for the PBCH data.
23. The method of claim 21 , wherein the SSB has a uniform bandwidth allocation for the PSS, the SSS, the PBCH data, and the PBCH DMRS included in the SSB.
24. The method of claim 21 , wherein the SSB includes one symbol that includes the PSS, one symbol that includes the SSS, and four symbols that include the PBCH data.
25. The method of claim 21 , wherein the SSB further includes one symbol that includes the PSS and the SSS.
26. The method of claim 21 , wherein the SSB includes one symbol that includes the PSS, the SSS, and the first portion of the PBCH data.
27. The method of claim 21 , wherein the SSB includes a symbol that includes the PSS, the SSS, and the second portion of the PBCH data.
28. The method of claim 21 , wherein a first-occurring symbol of the SSB includes the PSS, a second-occurring symbol of the SSB includes the SSS, and a third-occurring symbol, a fourth-occurring symbol, a fifth-occurring symbol, and a sixth-occurring symbol of the SSB include the PBCH data.
29. A method of wireless communication performed by a base station, comprising:
transmitting a synchronization signal block (SSB) using a single carrier quadrature amplitude modulation (SC-QAM) waveform, wherein:
the SSB has a uniform bandwidth allocation for each of a primary synchronization signal (PSS) included in the SSB, a secondary synchronization signal (SSS) included in the SSB, and physical broadcast channel (PBCH) data included in the SSB; and
the SSB includes one symbol that includes a first portion of the PBCH data, and one symbol that includes a PBCH demodulation reference signal (DMRS) and a second portion of the PBCH data; and
performing initial channel access based at least in part on the SSB.
30. The method of claim 29 , wherein the SSB has a uniform bandwidth allocation for the PSS, the SSS, the PBCH data, and the PBCH DMRS included in the SSB.