5g non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method and device

Abstract

The application discloses a 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method and device, comprising: acquiring channel equalized data symbols, cyclically shifting subcarrier indexes in the data symbols according to a timing error estimation value to obtain cyclically shifted subcarrier indexes, extracting a phase tracking reference signal group in the data symbols, and multiplying the phase tracking reference signal group by a local phase tracking reference signal group to obtain a phase noise estimation value of the phase tracking reference signal group; selecting data subcarriers with power values exceeding a power threshold value as auxiliary interpolation points, and calculating phase noise estimation values of the auxiliary interpolation points; interpolating and calculating the phase noise estimation value of the phase tracking reference signal group and the phase noise estimation value of the auxiliary interpolation points to obtain phase noise interpolation results of all subcarriers in the data symbols, and performing phase noise compensation on all subcarriers in the data symbols to obtain a phase noise compensation result. The application can improve the bit error rate performance of phase noise estimation and compensation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of communication, and particularly relates to a 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method and device. BACKGROUND

[0002] In recent years, with the development of 5G standards and the proposal of concepts such as broadband satellite Internet and non-ground network (NTN), broadband satellite communication based on 5G NTN has become a hot research topic, and the integration of satellite communication and traditional ground mobile communication to build an air-space-ground integrated network has become a trend of future mobile communication development. At the same time, with the development of mobile communication technology, the spectrum resources of existing low frequency bands (Sub-6GHz) are becoming increasingly scarce, and millimeter wave frequency bands (30GHz-300GHz) can provide larger communication bandwidth and higher transmission rate than traditional low frequency bands, and 5G millimeter wave broadband satellite communication has become a key technology in non-ground network construction.

[0003] Phase noise refers to the noise interference caused by oscillation of various radio frequency hardware, which can cause changes in the phase of the signal and affect the performance of the system. Generally speaking, the influence of phase noise on low frequency bands is small, however, as the operating frequency increases, especially above 6GHz, the phase noise generated by the non-ideal nature of oscillators and other hardware cannot be ignored, and has a great influence on high-order constellation demodulation, seriously affecting the bit error rate performance of the system, so it is very important to design an accurate phase noise estimation and compensation algorithm at the receiving end. Therefore, the 5G protocol specially defines a phase tracking reference signal (PTRS) for phase noise estimation and compensation of the uplink waveform. In the uplink of the 5G non-ground network, in order to reduce the peak-to-average ratio of the signal, the DFT-S-OFDM waveform is generally used for transmission, which adds a transform precoding operation in the frequency domain compared with the CP-OFDM waveform, at this time the phase noise is a random phase rotation on each constellation point.

[0004] However, in the 5G millimeter wave broadband system, the number of data subcarriers is large and the phase noise changes rapidly, and the estimation and compensation effect of the phase noise is not good by relying only on the interpolation of the phase estimation value at the PTRS, and due to the timing error inevitably generated in the uplink reception process, the phase of the data within the symbol will be circularly shifted, and this discontinuity of the phase will further worsen the estimation and compensation results. Therefore, it is urgent to improve the accuracy of phase noise estimation and compensation. SUMMARY

[0005] In order to solve the above problems existing in the prior art, the application provides a 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method and device. The technical problem to be solved by the application is solved by the following technical scheme:

[0006] In a first aspect, the present application provides a 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method, comprising:

[0007] Obtain the data symbol after channel equalization, and cyclically shift the subcarrier index in the data symbol according to the timing error estimation value to obtain the cyclically shifted subcarrier index;

[0008] According to the cyclically shifted subcarrier index, extract the phase tracking reference signal group in the data symbol, and multiply the phase tracking reference signal group and the local phase tracking reference signal group conjugate to obtain the phase noise estimation value of the phase tracking reference signal group;

[0009] Select the data subcarrier with power value exceeding the power threshold value from the data symbol as the auxiliary interpolation point, and calculate the phase noise estimation value of the auxiliary interpolation point;

[0010] Interpolate the phase noise estimation value of the phase tracking reference signal group and the phase noise estimation value of the auxiliary interpolation point to obtain the phase noise interpolation result of all subcarriers in the data symbol;

[0011] According to the phase noise interpolation result, compensate the phase noise of all subcarriers in the data symbol to obtain the phase noise compensation result.

[0012] In a second aspect, the present application also provides a 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation device, comprising:

[0013] The data acquisition module is used for obtaining the data symbol after channel equalization, and cyclically shifting the subcarrier index in the data symbol according to the timing error estimation value to obtain the cyclically shifted subcarrier index;

[0014] The data processing module is used for extracting the phase tracking reference signal group in the data symbol according to the cyclically shifted subcarrier index, and multiplying the phase tracking reference signal group and the local phase tracking reference signal group conjugate to obtain the phase noise estimation value of the phase tracking reference signal group;

[0015] The data auxiliary processing module is used for selecting the data subcarrier with power value exceeding the power threshold value from the data symbol as the auxiliary interpolation point, and calculating the phase noise estimation value of the auxiliary interpolation point;

[0016] The phase noise interpolation result calculation module is used for interpolating the phase noise estimation value of the phase tracking reference signal group and the phase noise estimation value of the auxiliary interpolation point to obtain the phase noise interpolation result of all subcarriers in the data symbol;

[0017] A phase noise compensation module is configured to compensate all subcarriers in the data symbol according to the phase noise interpolation result to obtain a phase noise compensation result.

[0018] The present application has the following advantages:

[0019] The 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method and device provided by the present application considers the influence of the receiving timing error on the data phase, simultaneously uses data assistance to perform interpolation to improve the interpolation accuracy of the phase noise estimation, can effectively improve the bit error rate performance of the phase noise estimation and compensation, and relieve the data phase discontinuity problem caused by the receiving timing error, has a low complexity, and is easy to implement.

[0020] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a flowchart of the 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method provided by the present application;

[0022] Figure 2 is a schematic diagram of the 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method provided by the present application;

[0023] Figure 3 is a schematic diagram of the power spectral density curve of the phase noise model under the condition that the carrier frequency is 45GHz;

[0024] Figure 4 is a schematic diagram of the bit error rate comparison between the method provided by the present application and the traditional method under the condition that the signal-to-noise ratio is 17-28dB;

[0025] Figure 5 is a schematic diagram of the comparison between the method provided by the present application and the traditional method in terms of the minimum signal-to-noise ratio required to reach 10% block error rate under the condition that the modulation and coding scheme is MCS25 and different timing errors exist at the receiving end. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Please refer to Figure 1 and Figure 2 , Figure 1 is a flowchart of the 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method provided by the present application, Figure 2A schematic diagram of a 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method provided by the embodiment of the present application, the 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method provided by the present application comprises:

[0028] S101, obtain the data symbol after channel equalization, and cyclically shift the subcarrier index in the data symbol according to the timing error estimation value to obtain the cyclically shifted subcarrier index.

[0029] Specifically, in the embodiment, the cyclically shifted subcarrier index includes the cyclically shifted phase tracking reference signal subcarrier index and the cyclically shifted data subcarrier index.

[0030] According to the timing error estimation value, the subcarrier index in the data symbol is cyclically shifted to obtain the cyclically shifted subcarrier index, including:

[0031] According to the timing error estimation value, the cyclic shift length m is calculated, and the expression is:

[0032]

[0033] Wherein, N STO represents the timing error estimation value, N SC represents the number of data symbol subcarriers, N FFT represents the number of Fourier transform points when demodulating the data symbol, [·] represents rounding to the nearest integer;

[0034] According to the cyclic shift length m, the cyclically shifted phase tracking reference signal subcarrier index and the cyclically shifted data subcarrier index The expressions are respectively:

[0035]

[0036] Wherein, k ptrs represents the phase tracking reference signal subcarrier index before cyclic shift, k data represents the data subcarrier index before cyclic shift, rem() N represents the modulus N remainder.

[0037] S102, according to the cyclically shifted subcarrier index, extract the phase tracking reference signal group in the data symbol, and multiply the phase tracking reference signal group and the local phase tracking reference signal group conjugate to obtain the phase noise estimation value of the phase tracking reference signal group.

[0038] Specifically, in the embodiment, the expression of the phase noise estimation value θ ptrs of the phase tracking reference signal group is:

[0039]

[0040] wherein, denotes the subcarrier index of the i-th phase tracking reference signal group, N S denotes the number of phase tracking reference signal symbols in each phase tracking reference signal group, r(n) denotes the phase tracking reference signal group extracted from the data symbol, t(n) denotes the local phase tracking reference signal group, * denotes the conjugate, arg denotes the argument operation.

[0041] In this embodiment, it also includes:

[0042] obtaining the phase noise estimation subcarrier index P ptrs , whose expression is:

[0043]

[0044] wherein, denotes the minimum value of the subcarrier index in each phase tracking reference signal group, N G denotes the number of phase tracking reference signal groups in each data symbol.

[0045] S103, selecting the data subcarriers with power values exceeding the power threshold from the data symbol as auxiliary interpolation points, and calculating the phase noise estimation values of the auxiliary interpolation points.

[0046] Specifically, in this embodiment, the phase noise estimation value of the auxiliary interpolation point is calculated by the following process, including:

[0047] calculating the power value S of the data subcarrier index in the data symbol, whose expression is:

[0048]

[0049] wherein, S i denotes the power value of the i-th data subcarrier index, d(i) denotes the data of the i-th data subcarrier;

[0050] selecting the data subcarriers with power values exceeding the power threshold from the data symbol as auxiliary interpolation points, and calculating the data subcarrier index P data corresponding to the auxiliary interpolation points, whose expression is:

[0051]

[0052] wherein, S th denotes the power threshold;

[0053] According to the positive and negative of the data real part and the data imaginary part of the data subcarrier corresponding to the auxiliary interpolation point, the reference constellation point q of the data subcarrier index corresponding to the auxiliary interpolation point is calculated, and the expression is:

[0054]

[0055] Wherein, q( i ) represents the reference constellation point of the i-th point in the data subcarrier index corresponding to the auxiliary interpolation point;

[0056] The data of the data subcarrier corresponding to the auxiliary interpolation point is multiplied by the conjugate of the reference constellation point of the data subcarrier index corresponding to the auxiliary interpolation point, and the phase noise estimation value θ of the auxiliary interpolation point is obtained data , and the expression is:

[0057] θ data ( i )=arg ( d(i)q * (i) ) ,i∈P data ;

[0058] Wherein, θ data ( i ) represents the phase noise estimation value of the i-th auxiliary interpolation point.

[0059] S104, the phase noise estimation value of the phase tracking reference signal group and the phase noise estimation value of the auxiliary interpolation point are interpolated to obtain the phase noise interpolation result of all subcarriers in the data symbol.

[0060] Specifically, in the embodiment, the expression of the phase noise interpolation result θ of all subcarriers in the data symbol is:

[0061]

[0062] Wherein, θ( i ) represents the phase noise interpolation result of the i-th subcarrier in the data symbol, P represents the set of the phase noise estimation subcarrier index P ptrs of the phase tracking reference signal group and the data subcarrier index P data corresponding to the auxiliary interpolation point, P1 and P2 respectively represent the two subcarrier indexes closest to the current auxiliary interpolation point in the set P, and the distance between P1 and the current auxiliary interpolation point is less than the distance between P2 and the current auxiliary interpolation point, θ P1 and θ P2 respectively represent the phase noise estimation value of P1 and P2.

[0063] S105 . Perform phase noise compensation on all subcarriers in the data symbol according to the phase noise interpolation result to obtain a phase noise compensated result.

[0064] Specifically, in this embodiment, the phase noise compensation result r comp The expression is:

[0065]

[0066] Where r(i) represents the i-th received data on the data symbol, i = 0, ..., N SC -1.

[0067] In summary, the present invention provides a 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method, which takes into account the impact of the receiving timing error on the data phase, and uses data-assisted interpolation to improve the interpolation accuracy of the phase noise estimation process. It can effectively improve the bit error rate performance after phase noise estimation and compensation, and alleviate the data phase discontinuity problem caused by the receiving timing error. It has low complexity and is easy to implement.

[0068] Based on the same inventive concept, the present invention further provides a 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation device, which is used to implement the 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method provided in the above embodiment of the present invention. The embodiment of the method is referred to above and will not be repeated here. The device includes:

[0069] A data acquisition module is used to obtain data symbols after channel equalization, and cyclically shift the subcarrier index in the data symbols according to the timing error estimation value to obtain the subcarrier index after cyclic shift;

[0070] a data processing module, configured to extract a phase tracking reference signal group from the data symbol according to the cyclically shifted subcarrier index, and conjugate-multiply the phase tracking reference signal group with the local phase tracking reference signal group to obtain a phase noise estimate of the phase tracking reference signal group;

[0071] A data auxiliary processing module is used to select data subcarriers whose power values ​​exceed a power threshold from the data symbols as auxiliary interpolation points, and calculate phase noise estimation values ​​of the auxiliary interpolation points;

[0072] A phase noise interpolation result calculation module is used to interpolate the phase noise estimation value of the phase tracking reference signal group and the phase noise estimation value of the auxiliary interpolation point to obtain the phase noise interpolation results of all subcarriers in the data symbol;

[0073] The phase noise compensation module is configured to compensate all subcarriers in the data symbol according to the phase noise interpolation result to obtain a phase noise compensation result.

[0074] In an optional embodiment of the present application, the effect of the 5G non-ground network millimeter wave uplink waveform phase noise estimation and compensation method provided in the above embodiment is verified through simulation experiments, specifically:

[0075] I. Simulation conditions

[0076] The simulation experiment of the present embodiment is carried out under MATLAB R2024b software, the PTRS sequence adopts the Gold pseudo-random sequence generated according to the 5G NR physical layer protocol, and the channel used in simulation is an additive white Gaussian noise channel.

[0077] II. Simulation content and result analysis

[0078] The system parameters are: subcarrier spacing 120 kHz, normal cyclic prefix type, frequency domain resource occupation 256 RB, orthogonal frequency division multiplexing (OFDM) modulation and demodulation point number 4096, modulation and coding scheme MCS25 (64QAM modulation), PTRS group number 8, PTRS symbol number in each PTRS group 4, and carrier frequency 45 GHz.

[0079] Please refer to Figure 3 and Figure 4 , Figure 3 is a schematic diagram of the power spectral density curve of the phase noise model provided by the embodiment of the present application under the condition of a carrier frequency of 45 GHz, Figure 4 is a schematic diagram of the bit error rate comparison between the method provided by the present application and the traditional method under the condition of a signal-to-noise ratio of 17-28 dB, and Figure 3 under the influence of the phase noise shown in Figure 4 It can be seen that the bit error rate performance of the method provided by the present application is obviously improved compared with the traditional method, and the effect of phase noise estimation and compensation can be effectively improved.

[0080] Please refer to Figure 5 , Figure 5 is a schematic diagram of the comparison of the lowest signal-to-noise ratio required by the method provided by the present application and the traditional method to achieve a 10% block error rate under the condition of different timing errors at the receiving end and when the modulation and coding scheme is MCS25, and Figure 5It can be seen that the required SNR threshold of the conventional method is higher than that of the method provided by the application when ideal synchronization is achieved, and the threshold changes obviously with the change of timing error, while the SNR threshold of the method provided by the application basically remains unchanged under various sizes of timing error, so it can be seen that the phase noise compensation performance of the method provided by the application under different timing errors has stability.

[0081] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Also, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the article or device including the element. The terms "connected" or "connected" and the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0082] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0083] The above is a further detailed description of the present application in conjunction with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For those skilled in the art, without departing from the concept of the present application, a number of simple deductions or replacements can be made, which should be considered as falling within the scope of protection of the present application.

Claims

1. A 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method, characterized in that: include: Acquire a data symbol after channel equalization, and cyclically shift a subcarrier index in the data symbol according to a timing error estimate to obtain a cyclically shifted subcarrier index; extracting a phase tracking reference signal group from the data symbol according to the cyclically shifted subcarrier index, and conjugate-multiplying the phase tracking reference signal group with a local phase tracking reference signal group to obtain a phase noise estimate of the phase tracking reference signal group; selecting, from the data symbols, data subcarriers whose power values ​​exceed a power threshold as auxiliary interpolation points, and calculating phase noise estimation values ​​of the auxiliary interpolation points; Interpolating the phase noise estimation value of the phase tracking reference signal group and the phase noise estimation value of the auxiliary interpolation point to obtain a phase noise interpolation result of all subcarriers in the data symbol; According to the phase noise interpolation result, phase noise compensation is performed on all subcarriers in the data symbol to obtain a phase noise compensated result.

2. The 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method according to claim 1 is characterized in that: The cyclically shifted subcarrier index includes a cyclically shifted phase tracking reference signal subcarrier index and a cyclically shifted data subcarrier index.

3. The 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method according to claim 2 is characterized in that: Cyclic shifting the subcarrier index in the data symbol according to the timing error estimate to obtain the cyclically shifted subcarrier index includes: Based on the estimated timing error, the cyclic shift length m is calculated as follows: Among them, N STO represents the estimated value of the timing error, N SC Indicates the number of data symbol subcarriers, N FFT Indicates the number of Fourier transform points when demodulating data symbols, [·] indicates rounding to the nearest integer; Calculate the phase tracking reference signal subcarrier index after cyclic shift according to the cyclic shift length m and the cyclically shifted data subcarrier index The expressions are: Among them, k ptrs k represents the subcarrier index of the phase tracking reference signal before cyclic shift, data Indicates the data subcarrier index before cyclic shift, rem() N It represents the remainder modulo N.

4. The 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method according to claim 1 is characterized in that: The phase noise estimation value θ of the phase tracking reference signal group ptrs The expression is: in, represents the subcarrier index of the i-th phase tracking reference signal group, N S represents the number of phase tracking reference signal symbols in each phase tracking reference signal group, r(n) represents the phase tracking reference signal group in the extracted data symbol, t(n) represents the local phase tracking reference signal group, * represents conjugate, and arg represents angle operation.

5. The 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method according to claim 4 is characterized in that: Also includes: Obtain the phase noise estimation value subcarrier index P of the phase tracking reference signal group ptrs , whose expression is: in, Indicates taking the minimum value of the subcarrier index in each phase tracking reference signal group, N G Indicates the number of phase tracking reference signal groups in each data symbol.

6. The 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method according to claim 1, characterized in that: Selecting data with power values ​​exceeding a power threshold from the data symbols as auxiliary interpolation points, and calculating phase noise estimation values ​​of the auxiliary interpolation points, including: Calculate the power value S of the data subcarrier index in the data symbol, which is expressed as: Among them, S (i) represents the power value of the i-th data subcarrier index, and d(i) represents the data of the i-th data subcarrier; Select a data subcarrier whose power value exceeds the power threshold from the data symbol as an auxiliary interpolation point, and calculate the data subcarrier index P corresponding to the auxiliary interpolation point. data , whose expression is: Among them, S th Indicates the power threshold; The data of the data subcarrier corresponding to the auxiliary interpolation point is conjugate-multiplied by the reference constellation point indexed by the data subcarrier corresponding to the auxiliary interpolation point to obtain the phase noise estimation value θ of the auxiliary interpolation point. data , whose expression is: θ data (i) =arg(d(i)q * (i)),i∈P data ; Among them, θ data (i) represents the phase noise estimate of the i-th auxiliary interpolation point.

7. The 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method according to claim 6, characterized in that: The process of obtaining the reference constellation point of the data subcarrier index corresponding to the auxiliary interpolation point includes: According to the positive and negative signs of the real and imaginary parts of the data subcarriers corresponding to the auxiliary interpolation points, the reference constellation point q of the data subcarrier index corresponding to the auxiliary interpolation points is calculated, and the expression is: Among them, q (i) Indicates the reference constellation point of the i-th point in the data subcarrier index corresponding to the auxiliary interpolation point.

8. The 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method according to claim 1 is characterized in that: The expression of the phase noise interpolation result θ of all subcarriers in the data symbol is: Among them, θ (i) represents the phase noise interpolation result of the i-th subcarrier in the data symbol, and P represents the phase noise estimation value subcarrier index P of the phase tracking reference signal group. ptrs The data subcarrier index P corresponding to the auxiliary interpolation point data P1 and P2 represent the two subcarrier indices closest to the current auxiliary interpolation point in the set P, θ P1 and θ P2 Represent the phase noise estimates of P1 and P2 respectively.

9. The 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation method according to claim 1, characterized in that: The phase noise compensation result r comp The expression is: Where r(i) represents the i-th received data on the data symbol, i = 0, ..., N SC -1.

10. A 5G non-terrestrial network millimeter wave uplink waveform phase noise estimation and compensation device, characterized in that: include: A data acquisition module, configured to acquire data symbols after channel equalization, and cyclically shift the subcarrier index in the data symbols according to the timing error estimate to obtain the cyclically shifted subcarrier index; a data processing module, configured to extract a phase tracking reference signal group in the data symbol according to the cyclically shifted subcarrier index, and conjugate-multiply the phase tracking reference signal group by a local phase tracking reference signal group to obtain a phase noise estimate of the phase tracking reference signal group; a data auxiliary processing module, configured to select data subcarriers having power values ​​exceeding a power threshold from the data symbols as auxiliary interpolation points, and calculate phase noise estimation values ​​of the auxiliary interpolation points; a phase noise interpolation result calculation module, configured to perform interpolation calculation on the phase noise estimation value of the phase tracking reference signal group and the phase noise estimation value of the auxiliary interpolation point to obtain the phase noise interpolation results of all subcarriers in the data symbol; The phase noise compensation module is used to perform phase noise compensation on all subcarriers in the data symbol according to the phase noise interpolation result to obtain a phase noise compensated result.

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