Method of performing phase noise compensation by a user equipment (UE) and apparatus using the same
Provided are a method for estimating and compensating for phase noise using a phase tracking reference signal in a wireless communication system, and an apparatus using the method.
1. A method of performing phase noise compensation by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a data signal and a phase tracking reference signal (PTRS), wherein the data signal is received based on a first numerology and the PTRS is received based on a second numerology;
estimating phase noise based on the PTRS; and
performing the phase noise compensation on the data signal in a time domain based on the estimated phase noise,
wherein a first data region in a first symbol for the first numerology is 2 n times longer than a second data region in a second symbol for the second numerology, where n is an integer of 1 or more,
wherein a cyclic prefix (CP) of a third symbol in which the data signal and the PTRS are received is configured based on a sum of the first data region and the second data region,
wherein a frequency length of a third data region in the third symbol is a same as a frequency length of the first data region, and
wherein the third data region is expressed as a sum of the first data region and 2 n number of the second data regions in a time domain.
2. The method of claim 1 , wherein the UE receives the data signal and the PTRS at the same time.
3. The method of claim 1 , wherein the second numerology is greater than the first numerology.
4. The method of claim 3 , wherein the second numerology is 2 n times greater than the first numerology, and wherein n is an integer of 1 or more.
5. The method of claim 1 , wherein a first time-frequency resource region to which the data signal is allocated and a second time-frequency resource region to which the PTRS is allocated do not overlap each other.
6. The method of claim 5 , wherein the second time-frequency resource region comprises a 0 Hz resource element (RE).
7. The method of claim 6 , wherein information for the first time-frequency resource region and the second time-frequency resource region is broadcast by a base station.
8. A user equipment (UE), the UE comprising:
at least one memory storing instructions;
at least one transceiver; and
at least one processor coupling the at least one memory and the at least one transceiver, wherein the at least one processor execute the instructions,
wherein the at least one processor:
receives a data signal and a phase tracking reference signal (PTRS), wherein the data signal is received based on a first numerology and the PTRS is received based on a second numerology;
estimates phase noise based on the PTRS; and
performs phase noise compensation on the data signal in a time domain based on the estimated phase noise,
wherein a first data region in a first symbol for the first numerology is 2 n times longer than a second data region in a second symbol for the second numerology, where n is an integer of 1 or more,
wherein a cyclic prefix (CP) of a third symbol in which the data signal and the PTRS are received is configured based on a sum of the first data region and the second data region,
wherein a frequency length of a third data region in the third symbol is a same as a frequency length of the first data region, and
wherein the third data region is expressed as a sum of the first data region and 2 n number of the second data regions in a time domain.
9. The UE of claim 8 , wherein the UE has a Fast Fourier Transformation (FFT) block dedicated to the data signal and a FFT block dedicated to the PTRS.
10. An apparatus configured to control a user equipment (UE), the apparatus comprising:
at least one processor; and
at least one memory operably connected to the at least one processor,
wherein the at least one memory stores instructions that, based on being executed by the at least one processor, cause the at least one processor to perform operations comprising:
receiving a data signal and a phase tracking reference signal (PTRS), wherein the data signal is received based on a first numerology and the PTRS is received based on a second numerology:
estimating phase noise based on the PTRS; and
performing phase noise compensation on the data signal in a time domain based on the estimated phase noise,
wherein a first data region in a first symbol for the first numerology is 2 n times longer than a second data region in a second symbol for the second numerology, where n is an integer of 1 or more,
wherein a cyclic prefix (CP) of a third symbol in which the data signal and the PTRS are received is configured based on a sum of the first data region and the second data region,
wherein a frequency length of a third data region in the third symbol is a same as a frequency length of the first data region, and
wherein the third data region is expressed as a sum of the first data region and 2 n number of the second data regions in a time domain.