Techniques and apparatuses for tertiary synchronization signal design for new radio
Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may identify a synchronization signal (SS) block index associated with a SS block; scramble a physical broadcast channel (PBCH), associated with the SS block, based at least in part on the SS block index; and transmit the SS block including a tertiary synchronization signal (TSS) and the PBCH, wherein the TSS includes information that identifies the SS block index associated with the SS block, and wherein the TSS is frequency division multiplexed with the PBCH in two or more orthogonal frequency-division multiplexed (OFDM) symbols of the SS block. Numerous other aspects are provided.
1. A method for wireless communication performed by a base station (BS), comprising:
identifying a synchronization signal (SS) block index associated with a SS block; and
transmitting the SS block including a tertiary synchronization signal (TSS) and a physical broadcast channel (PBCH),
wherein the TSS includes information that identifies at least a portion of the SS block index associated with the SS block,
wherein the TSS is frequency division multiplexed with the PBCH in two or more orthogonal frequency-division multiplexed (OFDM) symbols of the SS block, and
wherein the SS block includes an OFDM symbol including a primary synchronization signal (PSS).
2. The method of claim 1 , further comprising:
scrambling the PBCH based at least in part on a physical cell identifier that the SS block is associated with.
3. The method of claim 1 ,
wherein the TSS and the PBCH are frequency division multiplexed in other OFDM symbols of the SS block, and
wherein the SS block further includes another OFDM symbol that includes a secondary synchronization signal (SSS).
4. The method of claim 1 , wherein the TSS is a PBCH demodulation reference signal (DMRS).
5. The method of claim 1 , wherein the PBCH is modulated based at least in part on the TSS.
6. The method of claim 1 , wherein the TSS provides a phase reference for the PBCH.
7. The method of claim 1 , wherein the SS block is one of a plurality of SS blocks included in a SS burst, and the SS burst is one of a plurality of SS bursts included in a SS burst set.
8. A wireless communication device, comprising:
a memory; and
one or more processors coupled to the memory, the memory and the one or more processors configured to:
identify a synchronization signal (SS) block index associated with a SS block;
transmit the SS block including a tertiary synchronization signal (TSS) and a physical broadcast channel (PBCH),
wherein the TSS includes information that identifies at least a portion of the SS block index associated with the SS block,
wherein the TSS is frequency division multiplexed with the PBCH in two or more orthogonal frequency-division multiplexed (OFDM) symbols of the SS block, and
wherein the SS block includes an OFDM symbol including a primary synchronization signal (PSS).
9. The wireless communication device of claim 8 , wherein the one or more processors are further configured to:
scramble the PBCH based at least in part on a physical cell identifier that the SS block is associated with.
10. The wireless communication device of claim 8 ,
wherein the TSS and the PBCH are frequency division multiplexed in other OFDM symbols of the SS block, and
wherein the SS block further includes different OFDM symbol including a secondary synchronization signal (SSS).
11. The wireless communication device of claim 8 , wherein the TSS is a PBCH demodulation reference signal (DMRS).
12. The wireless communication device of claim 8 , wherein the PBCH is modulated based at least in part on the TSS.
13. The wireless communication device of claim 8 , wherein the TSS provides a phase reference for the PBCH.
14. The wireless communication device of claim 8 , wherein the SS block is one of a plurality of SS blocks included in a SS burst, and the SS burst is one of a plurality of SS bursts included in a SS burst set.
15. A method for wireless communication performed by a user equipment (UE), comprising:
receiving a synchronization signal (SS) block including a tertiary synchronization signal (TSS) and a physical broadcast channel (PBCH),
wherein the TSS includes information that identifies at least a portion of an SS block index associated with the SS block,
wherein the TSS is frequency division multiplexed with the PBCH in two or more orthogonal frequency-division multiplexed (OFDM) symbols of the SS block, and
wherein the SS block includes an OFDM symbol including a primary synchronization signal (PSS)
determining the SS block index based at least in part on the TSS and the PBCH; and
communicating with a base station based on the SS block index.
16. The method of claim 15 ,
wherein the TSS and the PBCH are frequency division multiplexed in different OFDM symbols of the SS block, and
wherein the SS block further includes another OFDM symbol including a secondary synchronization signal (SSS).
17. The method of claim 15 , wherein the TSS is a PBCH demodulation reference signal (DMRS).
18. The method of claim 15 , wherein the PBCH is demodulated based at least in part on the TSS.
19. The method of claim 15 , wherein the TSS is used as a phase reference for the PBCH.
20. The method of claim 15 , further comprising:
sending a measurement report including the SS block index and a physical cell identifier associated with the base station.
21. The method of claim 15 , wherein the SS block is one of a plurality of SS blocks included in a SS burst, and the SS burst is one of a plurality of SS bursts included in a SS burst set.
22. The method of claim 15 , further comprising:
acquiring a system based at least in part on the SS block index.
23. A wireless communication device, comprising:
a memory; and
one or more processors coupled to the memory, the memory and the one or more processors configured to:
receive a synchronization signal (SS) block including a tertiary synchronization signal (TSS) and a physical broadcast channel (PBCH),
wherein the TSS includes information that identifies at least a portion of SS block index associated with the SS block,
wherein the TSS is frequency division multiplexed with the PBCH in two or more orthogonal frequency-division multiplexed (OFDM) symbols of the SS block, and
wherein the SS block includes an OFDM symbol including a primary synchronization signal (PSS);
determine the SS block index based at least in part on the TSS; and
communicate with a base station based on the SS block index.
24. The wireless communication device of claim 23 ,
wherein the TSS and the PBCH are frequency division multiplexed in different OFDM symbols of the SS block, and
wherein the SS block further includes another OFDM symbol including a secondary synchronization signal (SSS).
25. The wireless communication device of claim 23 , wherein the TSS is a PBCH demodulation reference signal (DMRS).
26. The wireless communication device of claim 23 , wherein the PBCH is demodulated based at least in part on the TSS.
27. The wireless communication device of claim 23 , wherein the TSS is used as a phase reference for the PBCH.
28. The wireless communication device of claim 23 , wherein the one or more processors are further configured to:
send a measurement report including the SS block index and a physical cell identifier associated with the base station.
29. The wireless communication device of claim 23 , wherein the SS block is one of a plurality of SS blocks included in a SS burst, and the SS burst is one of a plurality of SS bursts included in a SS burst set.
30. The wireless communication device of claim 23 , wherein the one or more processors are further configured to:
acquire a system based at least in part on the SS block index.