Reference signal transmission method and apparatus
This application discloses a reference signal transmission method and apparatus. The method includes: generating one or more OFDM symbols, where at least one OFDM symbol includes a PTRS resource block, the PTRS resource block includes at least two of three sequences: a PTRS sequence of Y elements, X elements after the PTRS sequence, and Z elements before the PTRS sequence, and the PTRS resource block occupies a plurality of consecutive resource elements REs, where X, Y, and Z are all integers; and sending the one or more OFDM symbols. According to the foregoing method and apparatus, inter-carrier interference is reduced, thereby improving spectral efficiency.
1. A reference signal transmission method comprising:
generating one or more orthogonal frequency division multiplexing (OFDM) symbols, wherein at least one OFDM symbol comprises a phase tracking reference signal (PTRS) resource block, the PTRS resource block comprising at least two of three sequences: a PTRS sequence of Y elements, X elements after the PTRS sequence, and Z elements before the PTRS sequence, and the PTRS resource block occupies a plurality of consecutive resource elements (REs), wherein X, Y, and Z are integers; and
sending the one or more OFDM symbols.
2. The method according to claim 1 , wherein the PTRS resource block is located in one or more resource blocks (RBs).
3. The method according to claim 1 , wherein
the PTRS resource block comprises X+Y+Z elements, and the X elements, the Y elements, and the Z elements are consecutive and arranged in a frequency division manner, wherein X≤Y and Z≤Y; or
the PTRS resource block comprises X+Y elements or Y+Z elements, and the X elements and the Y elements, or the Y elements and the Z elements are consecutive and arranged in a frequency division manner, wherein X≤Y and Z≤Y; or
the PTRS resource block comprises X+Z elements, and the X elements and the Z elements are consecutive and arranged in a frequency division manner, wherein (X+Z)>Y.
4. The method according to claim 1 , wherein the PTRS resource block occupies a same position in each OFDM symbol.
5. A reference signal transmission method comprising:
receiving one or more orthogonal frequency division multiplexing (OFDM) symbols, wherein at least one OFDM symbol comprises a phase tracking reference signal (PTRS) resource block, the PTRS resource block comprising at least two of three sequences: a PTRS sequence of Y elements, X elements after the PTRS sequence, and Z elements before the PTRS sequence, and the PTRS resource block occupies a plurality of consecutive resource elements (REs), wherein X, Y, and Z are integers; and
obtaining a complete PTRS sequence from the one or more OFDM symbols.
6. The method according to claim 5 , wherein the PTRS resource block is located in one or more resource blocks (RBs).
7. The method according to claim 5 , wherein
the PTRS resource block comprises X+Y+Z elements, and the X elements, the Y elements, and the Z elements are consecutive and arranged in a frequency division manner, wherein X≤Y and Z≤Y; or
the PTRS resource block comprises X+Y elements or Y+Z elements, and the X elements and the Y elements, or the Y elements and the Z elements are consecutive and arranged in a frequency division manner, wherein X≤Y and Z≤Y; or
the PTRS resource block comprises X+Z elements, and the X elements and the Z elements are consecutive and arranged in a frequency division manner, wherein (X+Z)>Y.
8. The method according to claim 5 , wherein the PTRS resource block occupies a same position in each OFDM symbol.
9. A reference signal transmission apparatus comprising:
a processor configured to generate one or more orthogonal frequency division multiplexing (OFDM) symbols, wherein at least one OFDM symbol comprises a phase tracking reference signal (PTRS) resource block, the PTRS resource block comprising at least two of three sequences: a PTRS sequence of Y elements, X elements after the PTRS sequence, and Z elements before the PTRS sequence, and the PTRS resource block occupies a plurality of consecutive resource elements (REs), wherein X, Y, and Z are integers; and
a transmitter configured to send the one or more OFDM symbols.
10. The apparatus according to claim 9 , wherein the PTRS resource block is located in one or more resource blocks (RBs).
11. The apparatus according to claim 9 wherein
the PTRS resource block comprises X+Y+Z elements, and the X elements, the Y elements, and the Z elements are consecutive and arranged in a frequency division manner, wherein X≤Y and Z≤Y; or
the PTRS resource block comprises X+Y elements or Y+Z elements, and the X elements and the Y elements, or the Y elements and the Z elements are consecutive and arranged in a frequency division manner, wherein X≤Y and Z≤Y; or
the PTRS resource block comprises X+Z elements, and the X elements and the Z elements are consecutive and arranged in a frequency division manner, wherein (X+Z)>Y.
12. The apparatus according to claim 9 , wherein the PTRS resource block occupies a same position in each OFDM symbol.
13. A reference signal transmission apparatus comprising:
a receiver configured to receive one or more orthogonal frequency division multiplexing (OFDM) symbols, wherein at least one OFDM symbol comprises a phase tracking reference signal (PTRS) resource block, the PTRS resource block comprising at least two of three sequences: a PTRS sequence of Y elements, X elements after the PTRS sequence, and Z elements before the PTRS sequence, and the PTRS resource block occupies a plurality of consecutive resource elements (REs), wherein X, Y, and Z are integers; and
a processor configured to obtain a complete PTRS sequence from the one or more OFDM symbols.
14. The apparatus according to claim 13 , wherein the PTRS resource block is located in one or more resource blocks (RBs).
15. The apparatus according to claim 13 , wherein
the PTRS resource block comprises X+Y+Z elements, and the X elements, the Y elements, and the Z elements are consecutive and arranged in a frequency division manner, wherein X≤Y and Z≤Y; or
the PTRS resource block comprises X+Y elements or Y+Z elements, and the X elements and the Y elements, or the Y elements and the Z elements are consecutive and arranged in a frequency division manner, wherein X≤Y and Z≤Y; or
the PTRS resource block comprises X+Z elements, and the X elements and the Z elements are consecutive and arranged in a frequency division manner, wherein (X+Z)>Y.
16. The apparatus according to claim 13 , wherein the PTRS resource block occupies a same position in each OFDM symbol.