Communication method and communications apparatus
This application discloses a communication method and a communications apparatus. The method includes: determining, by a first device, a phase tracking reference signal PTRS pattern, where the PTRS pattern includes one or more PTRS chunks, and each PTRS chunk includes one or more PTRS samples; and mapping, by the first device, a PTRS to one or more symbols, and sending the one or more symbols to a second device.
1. A communication method, comprising:
mapping a phase tracking reference signal (PTRS) pattern to one or more symbols, wherein the PTRS pattern comprises multiple non-consecutive PTRS chunks in time domain, wherein each PTRS chunk of the multiple non-consecutive PTRS chunks comprises multiple consecutive PTRS samples in time domain, and wherein the multiple non-consecutive PTRS chunks of the PTRS pattern are in one symbol; and
sending the one or more symbols;
wherein a quantity of PTRS chunks in one symbol and a quantity of PTRS samples in one PTRS chunk are determined based on a scheduled bandwidth.
2. The method according to claim 1 , wherein the quantity of PTRS chunks in one symbol is 2 or 4; and
wherein the quantity of PTRS samples in one PTRS chunk is 2 or 4.
3. The method according claim 1 , wherein the quantity of PTRS chunks in one symbol is determined based on a correspondence between the scheduled bandwidth and the quantity of PTRS chunks; and
wherein the quantity of PTRS samples in one PTRS chunk is determined based on a correspondence between the scheduled bandwidth and the quantity of PTRS samples.
4. The method according to claim 1 , wherein the PTRS pattern is determined based on a distribution of PTRS chunks within a symbol, the quantity of PTRS chunks and the quantity of PTRS samples; and
wherein the distribution of PTRS chunks within the symbol is determined based on the quantity of PTRS chunks and the quantity of PTRS samples.
5. The method according to claim 4 , wherein the quantity of PTRS chunks is 2, and two PTRS chunks are distributed at two ends of the symbol.
6. The method according to claim 1 , further comprising:
receiving information for determining the quantity of PTRS chunks and the quantity of PTRS samples.
7. The method according to claim 1 , wherein the one or more symbols are one or more discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) symbols.
8. The method according to claim 1 , wherein mapping the PTRS pattern to the one or more symbols is based on the scheduled bandwidth not being lower than a threshold of scheduled bandwidth.
9. The method according to claim 8 , further comprising:
determining the threshold of scheduled bandwidth based on at least one of a phase noise level, a subcarrier spacing, or a frequency.
10. A communication method, comprising:
receiving one or more symbols, wherein a phase tracking reference signal (PTRS) pattern is mapped to the one or more symbols, wherein the PTRS pattern comprises multiple non-consecutive PTRS chunks in time domain, wherein each PTRS chunk of the multiple non-consecutive PTRS chunks comprises multiple consecutive PTRS samples in time domain, and wherein the multiple non-consecutive PTRS chunks of the PTRS pattern are in one symbol; and
determining the PTRS pattern from the one or more symbols;
wherein a quantity of PTRS chunks in one symbol and a quantity of PTRS samples in one PTRS chunk are determined based on a scheduled bandwidth.
11. The method according to claim 10 , wherein the quantity of PTRS chunks in one symbol is 2 or 4; and
wherein the quantity of PTRS samples in one PTRS chunk is 2 or 4.
12. The method according to claim 10 , wherein the quantity of PTRS chunks in one symbol is determined based on a correspondence between the scheduled bandwidth and the quantity of PTRS chunks;
wherein the quantity of PTRS samples in one PTRS chunk is determined based on a correspondence between the scheduled bandwidth and the quantity of PTRS samples.
13. The method according to claim 10 , wherein the PTRS pattern is determined based on a distribution of PTRS chunks within a symbol, the quantity of PTRS chunks and the quantity of PTRS samples;
wherein the distribution of PTRS chunks within the symbol is determined based on the quantity of PTRS chunks and the quantity of PTRS samples.
14. The method according to claim 13 , wherein the quantity of PTRS chunks is 2, and wherein two PTRS chunks are distributed at two ends of the symbol.
15. A communication apparatus, comprising:
a processor configured to map a phase tracking reference signal (PTRS) pattern to one or more symbols, wherein the PTRS pattern comprises multiple non-consecutive PTRS chunks in time domain, wherein each PTRS chunk of the multiple non-consecutive PTRS chunks comprises multiple consecutive PTRS samples in time domain, and wherein the multiple non-consecutive PTRS chunks of the PTRS pattern are in one symbol; and
a transceiver configured to send the one or more symbols;
wherein a quantity of PTRS chunks in one symbol and a quantity of PTRS samples in one PTRS chunk are determined based on a scheduled bandwidth.
16. The communication apparatus according to claim 15 , wherein the quantity of PTRS chunks in one symbol is 2 or 4; and
wherein the quantity of PTRS samples in one PTRS chunk is 2 or 4.
17. The communication apparatus according claim 15 , wherein the quantity of PTRS chunks in one symbol is determined based on a correspondence between the scheduled bandwidth and the quantity of PTRS chunks;
wherein the quantity of PTRS samples in one PTRS chunk is determined based on a correspondence between the scheduled bandwidth and the quantity of PTRS samples.
18. The communication apparatus according to claim 15 , wherein the PTRS pattern is determined based on a distribution of PTRS chunks within a symbol, the quantity of PTRS chunks and the quantity of PTRS samples;
wherein the distribution of PTRS chunks within the symbol is determined based on the quantity of PTRS chunks and the quantity of PTRS samples.
19. The communication apparatus according to claim 18 , wherein the quantity of PTRS chunks is 2, and wherein two PTRS chunks are distributed at two ends of the symbol.
20. The communication apparatus according to claim 15 , wherein the transceiver is further configured to receive information for determining the quantity of PTRS chunks and the quantity of PTRS samples.
21. The communication apparatus according to claim 15 , wherein the one or more symbols are one or more discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) symbols.
22. The communication apparatus according to claim 15 , wherein the processor is further configured to not map a respective PTRS pattern based on a respective scheduled bandwidth being lower than a threshold of scheduled bandwidth.
23. The communication apparatus according to claim 22 , wherein the processor is further configured to determine the threshold of scheduled bandwidth based on at least one of a phase noise level, a subcarrier spacing, or a frequency.
24. A communication apparatus, comprising:
a transceiver configured to receive one or more symbols, wherein a phase tracking reference signal (PTRS) pattern is mapped to the one or more symbols, wherein the PTRS pattern comprises multiple non-consecutive PTRS chunks in time domain, wherein each PTRS chunk of the multiple non-consecutive PTRS chunks comprises multiple consecutive PTRS samples in time domain, and wherein the multiple non-consecutive PTRS chunks of the PTRS pattern are in one symbol; and
a processor configured to determine the PTRS pattern from the one or more symbols;
wherein a quantity of PTRS chunks in one symbol and a quantity of PTRS samples in one PTRS chunk are determined based on a scheduled bandwidth.
25. The communication apparatus according to claim 24 , wherein the quantity of PTRS chunks in one symbol is 2 or 4; and
wherein the quantity of PTRS samples in one PTRS chunk is 2 or 4.
26. The communication apparatus according to claim 24 , wherein the quantity of PTRS chunks in one symbol is determined based on a correspondence between the scheduled bandwidth and the quantity of PTRS chunks;
wherein the quantity of PTRS samples in one PTRS chunk is determined based on a correspondence between the scheduled bandwidth and the quantity of PTRS samples.
27. The communication apparatus according to claim 24 , wherein the PTRS pattern is determined based on a distribution of PTRS chunks within a symbol, the quantity of PTRS chunks and the quantity of PTRS samples;
wherein the distribution of PTRS chunks within the symbol is determined based on the quantity of PTRS chunks and the quantity of PTRS samples.
28. The communication apparatus according to claim 27 , wherein the quantity of PTRS chunks is 2, and wherein two PTRS chunks are distributed at two ends of the symbol.