Demodulation reference signal transmission method and apparatus
A signal transmission method and an apparatus are disclosed. In an embodiment a signal transmission method includes generating a reference signal and sending the reference signal, wherein the reference signal is sent in a specific time-frequency resource, and the specific time-frequency resource is located on symbols corresponding to a synchronization signal block.
1. A method comprising:
mapping a demodulation reference signal (DMRS) to a plurality of resource elements (REs) comprised in a time-frequency resource, wherein the time-frequency resource includes symbols where a physical broadcast channel (PBCH) or a secondary synchronization signal (SSS) is mapped, and a frequency resource of REs on a symbol where the SSS and the DMRS are mapped comprises a first frequency area where subcarriers of the DMRS are located and a second frequency area where subcarriers of the SSS are located, the first frequency area being different from the second frequency area, and wherein the PBCH, the SSS and a primary synchronization signal (PSS) are comprised in a synchronization signal block.
2. The method according to claim 1 , wherein REs of the plurality of REs are adjacent in a time domain and not adjacent in a frequency domain in the time-frequency resource.
3. The method according to claim 1 , wherein a third frequency area of the time-frequency resource comprises subcarriers of the PBCH of the synchronization signal block.
4. The method according to claim 1 , further comprising:
generating the DMRS using a time-frequency resource unit as a unit, wherein the time-frequency resource unit includes symbols of the synchronization signal block.
5. The method according to claim 1 , wherein locations of the REs of the plurality of REs are related to a cell identifier (ID).
6. The method according to claim 1 , wherein before mapping the DMRS, the method further comprises:
generating the DMRS; and
after mapping the DMRS, the method further comprises:
sending the DMRS on the plurality of REs.
7. The method according to claim 1 , wherein the time-frequency resource excludes a symbol where the PSS is mapped.
8. An apparatus comprising:
one or more circuits in communication with a memory storage comprising instructions, wherein the instructions, when executed by the one or more circuits, cause the apparatus to:
map a demodulation reference signal (DMRS) to a plurality of resource elements (REs) comprised in a time-frequency resource, wherein the time-frequency resource includes symbols where a physical broadcast channel (PBCH) or a secondary synchronization signal (SSS) is mapped, and a frequency resource of REs on a symbol where the SSS and the DMRS are mapped comprises a first frequency area where subcarriers of the DMRS are located and a second frequency area where subcarriers of the SSS are located, the first frequency area being different from the second frequency area, and wherein the PBCH, the SSS and a primary synchronization signal (PSS) are comprised in a synchronization signal block.
9. The apparatus according to claim 8 , wherein REs of the plurality of REs are adjacent in a time domain and not adjacent in a frequency domain in the time-frequency resource.
10. The apparatus according to claim 8 , wherein a third frequency area of the time-frequency resource comprises subcarriers of the PBCH of the synchronization signal block.
11. The apparatus according to claim 8 , wherein the instructions, when executed by the one or more circuits, cause the apparatus further to:
generate the DMRS using a time-frequency resource unit as a unit, wherein the time-frequency resource unit includes symbols of the synchronization signal block.
12. The apparatus according to claim 8 , wherein locations of the REs of the plurality of REs are related to a cell identifier (ID).
13. The apparatus according to claim 8 , wherein the instructions, when executed by the one or more circuits, cause the apparatus further to:
generate the DMRS; and
send the DMRS on the plurality of REs.
14. The apparatus according to claim 8 , wherein the time-frequency resource excludes a symbol where the PSS is mapped.
15. A method comprising:
receiving a demodulation reference signal (DMRS) on a plurality of resource elements (REs) comprised in a time-frequency resource, wherein the time-frequency resource includes symbols where a physical broadcast channel (PBCH) or a secondary synchronization signal (SSS) is mapped, and a frequency resource of REs on a symbol where the SSS and the DMRS are mapped comprises a first frequency area where subcarriers of the DMRS are located and a second frequency area where subcarriers of the SSS are located, the first frequency area being different from the second frequency area, and wherein the PBCH, the SSS and a primary synchronization signal (PSS) are comprised in a synchronization signal block; and
using the DMRS for the PBCH.
16. The method according to claim 15 , wherein REs of the plurality of REs are adjacent in a time domain and not adjacent in a frequency domain in the time-frequency resource.
17. The method according to claim 15 , wherein a third frequency area of the time-frequency resource comprises subcarriers of the PBCH of the synchronization signal block.
18. The method according to claim 15 , wherein locations of REs of the plurality of REs are related to a cell identifier (ID).
19. The method according to claim 15 , wherein the time-frequency resource excludes a symbol where the PSS is mapped.
20. An apparatus comprising:
one or more circuits in communication with a memory storage comprising instructions, wherein the instructions, when executed by the one or more circuits, cause the apparatus to:
receive a demodulation reference signal (DMRS) on a plurality of resource elements (REs) comprised in a time-frequency resource, wherein the time-frequency resource includes symbols where a physical broadcast channel (PBCH) or a secondary synchronization signal (SSS) is mapped, and a frequency resource of REs on a symbol where the SSS and the DMRS are mapped comprises a first frequency area where subcarriers of the DMRS are located and a second frequency area where subcarriers of the SSS are located, the first frequency area being different from the second frequency area, and wherein the PBCH, the SSS and a primary synchronization signal (PSS) are comprised in a synchronization signal block; and
use the DMRS for the PBCH.
21. The apparatus according to claim 20 , wherein REs of the plurality of REs are adjacent in a time domain and not adjacent in a frequency domain in the time-frequency resource.
22. The apparatus according to claim 20 , wherein a third frequency area of the time-frequency resource comprises subcarriers of the PBCH of the synchronization signal block.
23. The apparatus according to claim 20 , wherein locations of REs of the plurality of REs are related to a cell identifier (ID).
24. The apparatus according to claim 20 , wherein the time-frequency resource excludes a symbol where the PSS is mapped.