Method and device for allocating PTRS to resource block in wireless communication system
According to an embodiment of the present specification, a method for transmitting, by a base station, a signal for eliminating phase noise by a terminal in an mmWave communication system may be provided. A method for transmitting a signal for eliminating phase noise may comprise the steps of: generating a PTRS; allocating the PTRS to one or more resource blocks included in a scheduled bandwidth; and transmitting the allocated PTRS, wherein an interval between the one or more resource blocks, to which the PTRs are allocated, is determined on the basis of the scheduled bandwidth.
1. A method of transmitting, by a base station, a signal for enabling a user equipment (UE) to eliminate phase noise in a millimeter wave (mmWave) communication system, the method comprising:
generating a phase tracking reference signal (PTRS);
allocating the PTRS to one or more resource blocks included in a scheduled bandwidth; and
transmitting the allocated PTRS,
wherein an interval between the one or more resource blocks to which the PTRS is allocated is determined based on the scheduled bandwidth, and
wherein indices of the resource blocks to which the PTRS is allocated are shifted based on at least one of identification (ID) of the UE or a maximum number of shiftable resource blocks.
2. The method of claim 1 , wherein the interval between the one or more resource blocks to which the PTRS is allocated is 1 based on the scheduled bandwidth less than a first threshold, one PTRS being allocated for each resource block,
wherein the interval between the one or more resource blocks to which the PTRS is allocated is 2 based on the scheduled bandwidth more than or equal to the first threshold and less than a second threshold, one PTRS being allocated for every two resource blocks, and
wherein the interval between the one or more resource blocks to which the PTRS is allocated is 4 based on the scheduled bandwidth more than the second threshold, one PTRS being allocated for every four resource blocks.
3. The method of claim 1 , wherein a maximum number of PTRS subcarriers to which the PTRS is allocated is determined based on the scheduled bandwidth.
4. The method of claim 3 , wherein based on the PTRS allocated based on the interval between the one or more resource blocks to which the PTRS is allocated and a number of the one or more resource blocks to which the PTRS is allocated more than the maximum number of PTRS subcarriers, the PTRS is not allocated to remaining resource blocks included in the scheduled bandwidth.
5. The method of claim 1 , wherein the PTRS is allocated from a resource block with a low resource block index based on the interval between the one or more resource blocks to which the PTRS is allocated.
6. The method of claim 1 , wherein the maximum number of shiftable resource blocks corresponds to the interval between the one or more resource blocks to which the PTRS is allocated.
7. The method of claim 1 , wherein a number of one or more PTRS subcarriers to which PTRS is allocated is determined based on the scheduled bandwidth.
8. The method of claim 7 , wherein resource block indices of the one or more resource blocks to which the PTRS is allocated are determined according to Equation A:
i
=
⌊
l
P
L
⌋
+
k
,
l
=
0
,
1
,
…
,
L
-
1
,
[
Equation
A
]
where i denotes the indices of the resource blocks to which the PTRS is allocated, P denotes the scheduled bandwidth, L denotes the number of one or more PTRS subcarriers to which the PTRS is allocated, and k denotes an offset value.
9. A base station for transmitting a signal for enabling a user equipment (UE) to eliminate phase noise in a millimeter wave (mmWave) communication system, the base station comprising:
a receiver configured to receive a signal from an external device;
a transmitter configured to transmit a signal to an external device; and
a processor configured to control the receiver and the transmitter,
wherein the processor is configured to:
generate a phase tracking reference signal (PTRS);
allocate the PTRS to one or more resource blocks included in a scheduled bandwidth; and
control the transmitter to transmit the allocated PTRS, and
wherein an interval between the one or more resource blocks to which the PTRS is allocated is determined based on the scheduled bandwidth, and
wherein indices of the resource blocks to which the PTRS is allocated are shifted based on at least one of identification (ID) of the UE or a maximum number of shiftable resource blocks.
10. The base station of claim 9 , wherein the interval between the one or more resource blocks to which the PTRS is allocated is 1 based on the scheduled bandwidth less than a first threshold, one PTRS being allocated for each resource block,
wherein the interval between the one or more resource blocks to which the PTRS is allocated is 2 based on the scheduled bandwidth more than or equal to the first threshold and less than a second threshold, one PTRS being allocated for every two resource blocks, and
wherein the interval between the one or more resource blocks to which the PTRS is allocated is 4 based on the scheduled bandwidth more than the second threshold, one PTRS being allocated for every four resource blocks.
11. The base station of claim 9 , wherein a maximum number of PTRS subcarriers to which the PTRS is allocated is determined based on the scheduled bandwidth.
12. The base station of claim 11 , wherein based on the PTRS allocated based on the interval between the one or more resource blocks to which the PTRS is allocated and a number of the one or more resource blocks to which the PTRS is allocated more than the maximum number of PTRS subcarriers, the PTRS is not allocated to remaining resource blocks included in the scheduled bandwidth.
13. The base station of claim 9 , wherein the PTRS is allocated starting from a resource block with a low resource block index based on the interval between the one or more resource blocks to which the PTRS is allocated.
14. The base station of claim 9 , wherein the maximum number of shiftable resource blocks corresponds to the interval between the one or more resource blocks to which the PTRS is allocated.
15. The base station of claim 9 , wherein a number of one or more PTRS subcarriers to which PTRS is allocated is determined based on the scheduled bandwidth.
16. The base station of claim 15 , wherein resource block indices of the one or more resource blocks to which the PTRS is allocated are determined according to Equation A:
i
=
⌊
l
P
L
⌋
+
k
,
l
=
0
,
1
,
…
,
L
-
1
[
Equation
A
]
where i denotes the indices of the resource blocks to which the PTRS is allocated, P denotes the scheduled bandwidth, L denotes the number of one or more PTRS subcarriers to which the PTRS is allocated, and k denotes an offset value.