CN115021836A

CN115021836A - Signal compensation method and device, and frequency domain compensation data determination method and device

Info

Publication number: CN115021836A
Application number: CN202210608764.3A
Authority: CN
Inventors: 施展
Original assignee: Zeku Technology Beijing Corp Ltd
Current assignee: Zeku Technology Beijing Corp Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-06

Abstract

The application provides a signal compensation method, comprising the following steps: acquiring a slope parameter corresponding to each frequency domain interval of a plurality of frequency domain intervals; the slope parameter corresponding to each frequency domain interval is determined based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; the at least two sampling points and the corresponding ideal compensation values thereof meet an ideal compensation function, and the ideal compensation function is used for indicating the correlation between the sampling points in the frequency domain and the frequency domain compensation values of the target signals; and compensating the signal value of the target signal by using the slope parameter corresponding to each frequency domain interval. The application also provides a frequency domain compensation data determination method, a signal compensation device, communication equipment and a storage medium.

Description

Signal compensation method and device, and frequency domain compensation data determination method and device

Technical Field

The present application relates to the field of electronic technologies, and in particular, to a signal compensation method and apparatus, and a frequency domain compensation data determining method and apparatus.

Background

In modern wireless communication systems, a received signal inevitably experiences frequency domain impairments due to physical devices such as modems, which are usually represented by non-flatness of the frequency domain amplitude response within the effective bandwidth of the received signal. Such frequency domain distortion may affect the quality of the received signal to some extent, as well as the performance of the communication transmission.

Generally, a method for correcting such frequency domain impairments at a signal receiving end is to compensate for signal distortions by multiplying a signal value of a received signal by a frequency domain compensation value. In the existing frequency domain signal compensation scheme, if ideal compensation precision is achieved, a large number of frequency domain compensation values need to be stored and transmitted, so that large storage cost is caused; when a certain amount of frequency domain compensation values are stored and transmitted, the compensation accuracy of the signal is reduced. Therefore, how to balance the relationship between the compensation accuracy and the amount of information stored/transmitted is an urgent technical problem to be solved.

Disclosure of Invention

The application provides a signal compensation method and device, a frequency domain compensation data determination method and device, equipment and a storage medium.

The technical scheme of the application is realized as follows:

the application provides a signal compensation method, comprising the following steps:

acquiring a slope parameter corresponding to each frequency domain interval of a plurality of frequency domain intervals; the slope parameter corresponding to each frequency domain interval is determined based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; the at least two sampling points and the corresponding ideal compensation values thereof meet an ideal compensation function, and the ideal compensation function is used for indicating the correlation between the sampling points in the frequency domain and the frequency domain compensation values of the target signals;

and compensating the signal value of the target signal by using the slope parameter corresponding to each frequency domain interval.

The application provides a frequency domain compensation data determination method, which comprises the following steps:

determining a plurality of frequency domain intervals;

acquiring ideal compensation values corresponding to at least two sampling points in each frequency domain interval based on an ideal compensation function; the ideal compensation function is used for indicating the correlation between the sampling point in the frequency domain and the frequency domain compensation value of the target signal;

determining a slope parameter corresponding to each frequency domain interval based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; and the slope parameter corresponding to each frequency domain interval is used for compensating the signal value of the target signal.

The embodiment of the application provides a signal compensation device, the device includes:

a first obtaining unit configured to obtain a slope parameter corresponding to each of a plurality of frequency domain intervals; the slope parameter corresponding to each frequency domain interval is determined based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; the at least two sampling points and the corresponding ideal compensation values thereof meet an ideal compensation function, and the ideal compensation function is used for indicating the correlation between the sampling points in the frequency domain and the frequency domain compensation values of the target signals;

a signal compensation unit configured to compensate a signal value of the target signal using the slope parameter corresponding to each frequency domain interval.

The present application provides a frequency domain compensation data determination apparatus, the apparatus comprising:

a determining unit configured to determine a plurality of frequency domain intervals;

a second obtaining unit configured to obtain ideal compensation values corresponding to at least two sampling points in each frequency domain interval; the ideal compensation function is used for indicating the correlation between the sampling point in the frequency domain and the frequency domain compensation value of the target signal;

the determining unit is further configured to determine a slope parameter corresponding to each frequency domain interval based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; and the slope parameter corresponding to each frequency domain interval is used for compensating the signal value of the target signal.

The embodiment of the application provides a modem, which comprises a processor and a memory, wherein the memory stores executable instructions of the processor;

the processor and the memory are connected through a bus;

the processor is configured to execute the steps of the signal compensation method or the steps of the frequency domain compensation data determination method when the executable instructions stored in the memory are executed.

The present application further provides a communication device comprising a processor, and a memory storing instructions executable by the processor;

the processor and the memory are connected through a bus;

The present application provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, realizes the steps in the above-mentioned signal compensation method or which, when being executed by a processor, realizes the steps in the above-mentioned frequency domain compensation data determination method.

The present application provides a computer program product comprising computer readable code which, when run in a processor, performs the steps for implementing the above-mentioned signal compensation method or which, when executed, implements the steps in the above-mentioned frequency domain compensation data determination method.

Drawings

Fig. 1 is a schematic diagram of an exemplary network architecture provided in the present application;

FIG. 2 is a schematic diagram of an exemplary business scenario provided herein;

FIG. 3 is a graphical illustration of the non-flatness of a frequency domain amplitude response provided herein;

FIG. 4 is a schematic diagram illustrating frequency domain amplitude compensation in a related art provided herein;

FIG. 5 is a first flowchart illustrating an implementation of a signal compensation method provided in the present application;

FIG. 6 is a first diagram illustrating exemplary frequency domain amplitude compensation of a signal as provided herein;

FIG. 7 is a second flowchart illustrating an implementation of a signal compensation method according to the present application;

FIG. 8 is a second exemplary signal frequency domain amplitude compensation scheme provided herein;

FIG. 9 is a third exemplary signal frequency domain amplitude compensation scheme as provided herein;

fig. 10 is a schematic flow chart illustrating an implementation of a method for determining frequency-domain compensation data according to the present application;

fig. 11 is a schematic flow chart illustrating an implementation of a signal compensation method provided in the present application;

fig. 12 is a schematic flow chart showing an implementation of a signal compensation method provided in the present application;

FIG. 13 is a schematic diagram of a signal compensation device according to the present application;

FIG. 14 is a schematic diagram illustrating the structure of a frequency domain compensation data determining apparatus provided in the present application;

fig. 15 is a schematic diagram of a hardware structure of a modem provided in the present application.

Detailed Description

So that the manner in which the features and elements of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.

It should be noted that the terms "first", "second", and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

It should be understood that the technical solution of the embodiment of the present application may be applied to the 4th generation mobile communication system (4G), a New Radio (NR) system or a future communication system, and may also be applied to other various wireless communication systems, for example: a narrowband Band-Internet of Things (NB-IoT) System, a Global System for Mobile communications (GSM), an Enhanced Data rate for GSM Evolution (EDGE) System, a Wideband Code Division Multiple Access (WCDMA) System, a Code Division Multiple Access (Code Division Multiple Access) 2000 System, a Time Division-synchronous Code Division Multiple Access (CDMA 2000) System, a Time Division-synchronous Code Division Multiple Access (TD-SCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, a Frequency Division Duplex (FDD) System, an LTE (TDD-Duplex), a UMTS-Universal Mobile telecommunications System, and the like.

Fig. 1 illustrates a network architecture to which embodiments of the present application may be applied. As shown in fig. 1, the network architecture provided by the present embodiment includes: network device 101 and terminal device 102. The terminal devices related to the embodiments of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other electronic devices connected to a wireless modem, and various forms of user terminal devices (terminal devices) or Mobile Stations (MSs), etc. with wireless communication functions. The network device according to the embodiments of the present application is a device deployed in a radio access network to provide a terminal device with a wireless communication function. In the embodiment of the present application, the network device may be, for example, a base station shown in fig. 1, and the base station may include various forms of electronic devices such as a macro base station, a micro base station, a relay station, and an access point.

The signal compensation method provided by the embodiment of the application can be applied to a receiving end when information interaction is carried out between network equipment and terminal equipment, and the receiving end can be either the terminal equipment or the network equipment. Optionally, the method may also be applied to an information interaction process between terminals, that is, the sending end and the receiving end are two different terminals, which is not limited in this embodiment of the present application.

In practical applications, signals received by a Modem (Modem) experience severe frequency domain impairments. Generally, the frequency domain damage may be caused by the frequency domain characteristics of the analog device channel and the digital filtering channel, and the subsequent result is that the main lobe of the signal spectrum is damaged and the shape is severely distorted.

Fig. 2 shows a service scenario to which the signal compensation method provided by the present application may be applied, and as shown in fig. 2, the method may be applied to a Modem 21 of 4G/5G standard.

As shown in fig. 2, the target signal enters the receiver from the antenna, passes through the radio frequency link module and an Analog Digital Converter (ADC), and then enters the Modem 21 for processing. That is, the target signal may experience frequency domain impairments of the radio frequency link, as well as frequency domain impairments of the ADC components.

The Modem 21 may include a digital link impairment (defect) module, a Discrete Fourier Transform (DFT) or Fast Fourier Transform (FFT) module, a Demodulation and Detection (DMD) module, and a Cell Search and Measurement (CSM) module.

The digital link damage module is used for carrying out down-sampling and filtering processing on the target signal and filtering an interference signal. The DFT/FFT module is used to convert the target signal from the time domain to the frequency domain in order to obtain a baseband signal. The DMD module is used for demodulating and detecting the baseband signal. The CSM module is used for carrying out cell search and measurement according to the baseband signals.

Referring to the schematic diagram shown in fig. 3, the frequency spectrum 31 of the signal subjected to frequency domain impairments has changed greatly from the frequency spectrum 32 of the ideal received signal (i.e., the frequency spectrum of the target signal without frequency domain impairments), and as the signal undergoes different channels, the signal also undergoes various impairments in the frequency domain. These impairments all need corresponding compensation values to compensate the impairments in the frequency domain, otherwise the subsequent processing such as channel estimation and measurement will be seriously affected. In order to reduce the effect of the frequency domain impairments, in practical applications, the ideal compensation function 33 may be determined from the spectrum 32 of the ideal received signal and the spectrum 31 of the signal that has been impaired in the frequency domain. Based on the ideal compensation function 33, the target signal may be frequency-domain compensated.

Specifically, the current compensation method may be that spectrum inversion is performed according to frequency domain impairments caused by a device (e.g., the radio frequency link module shown in fig. 2, or the ADC module, or the digital link impairment module) to obtain an ideal compensation value of each sampling point in the frequency domain, where the ideal compensation value may be understood as a compensation value that restores the signal value of each sampling point to the size of the received frequency domain impairments. And then, constructing a polynomial between the sampling point and the ideal compensation value, performing off-line fitting on the polynomial, enabling the calculation result of each sampling point in the polynomial to approach the ideal compensation value, determining the coefficient of each item in the polynomial, obtaining the fitting coefficient corresponding to each item, and storing the fitting coefficients. When frequency domain compensation is needed, the frequency domain compensation value of each sampling point can be calculated based on the fitting coefficient of the polynomial, and then the obtained frequency domain compensation value of each sampling point is multiplied by the frequency spectrum 31 of the target signal damaged by the frequency domain, so that the frequency domain compensation of the target signal is realized.

However, the above scheme needs to store the fitting coefficient corresponding to each sampling point, and the calculation method is complex and the data storage amount is large. In order to reduce the operation complexity and the amount of stored data, referring to fig. 4, in practical application, the received signal may be uniformly segmented in the frequency domain, the sampling point in each frequency domain interval is compensated by using the same compensation value, and the compensation value corresponding to each frequency domain interval is an average value of ideal compensation values of all sampling points in the frequency domain interval.

In fig. 4, the horizontal axis represents the frequency domain, the vertical axis represents the amplitude domain, and the dotted line 41 represents a curve corresponding to the ideal compensation function h (f). In addition, fig. 4 further includes a plurality of dashed lines 42, the dashed lines 42 may be used to distinguish a plurality of divided frequency domain intervals, and a frequency domain between two adjacent dashed lines 42 represents one frequency domain interval. In addition, each frequency domain interval includes a solid line 43, and the amplitude value corresponding to the solid line 43 is the frequency domain compensation value of the sampling point in each frequency domain interval.

In the related art corresponding to fig. 4, signal compensation can be performed by the following steps:

a, averagely dividing a frequency domain needing frequency domain compensation into K frequency domain intervals, and calculating a frequency domain compensation value corresponding to each frequency domain interval.

The frequency domain compensation value of each frequency domain interval may be an average value of ideal compensation values of all sampling points in the frequency domain interval after the frequency domain interval is divided. The ideal compensation value is here determined by the ideal compensation function h (f), i.e. curve 41 in fig. 4. Illustratively, the value of the ordinate corresponding to the sampling point 4 may be determined as H (4) according to the curve 41, and therefore, the ideal compensation value of the sampling point 4 may be determined as H (4).

And b, when the target signal is received, acquiring a frequency domain compensation value corresponding to each frequency domain interval from the storage space.

And c, performing point-by-point compensation on the target signal based on the frequency domain compensation value of each frequency domain interval.

Wherein the same frequency domain compensation value h is used for the sampling points in the kth frequency domain interval (for example, the sampling points 1 to 4 in the first frequency domain interval) _k Compensation is carried out, K is [1, K ]]Any integer within. Equation (1) shows a frequency domain compensation sequence of the target signal.

Wherein the content of the first and second substances,

and compensating the sequence for the frequency domain of the signal, wherein a frequency domain compensation value corresponding to each sampling point in the frequency domain is included. L is the length of each frequency domain interval, and may also be understood as the number of samples in each frequency domain interval, where L · K is N/2. N is the FFT length and can also be understood as the number of all samples in the frequency domain.

That is, the apparatus in the related art may store only the frequency domain compensation values corresponding to each frequency domain interval without storing the compensation values of all the sampling points.

However, in order to improve the compensation accuracy, the method comprises

Approximating the ideal compensation function h (f), can be optimized according to equation (2) below.

It can be understood that, in order to achieve a certain compensation accuracy in the related art, more frequency domain intervals need to be divided (i.e. the K value is increased), which causes storage and transmission burdens. And under the condition of a certain amount of transmitted and stored information, the compensation precision is limited.

Based on this, the embodiments of the present application provide a signal compensation method, which may be applied in a Modem, or in a terminal device including a Modem, or in a network device including a Modem. Taking a terminal device as an example, the terminal device may obtain a slope parameter corresponding to each of a plurality of frequency domain intervals in a frequency domain of a target signal; the slope parameter is determined based on ideal compensation values corresponding to at least two sampling points in the current frequency domain interval respectively; the ideal compensation function is used for indicating the correlation between the sampling point in the frequency domain and the frequency domain compensation value of the target signal; and compensating the signal value of the target signal by using the slope parameter corresponding to each frequency domain interval.

That is, after receiving the target signal, the terminal device may divide the frequency domain into a plurality of frequency domain intervals, and perform compensation processing on the target signal by using a slope parameter corresponding to each frequency domain interval; the slope parameter of each frequency domain interval can represent the change condition of the ideal compensation value of the sampling point in the corresponding frequency domain interval, so that the compensation value of the sampling point in the corresponding frequency domain interval is determined to be closer to the ideal compensation value based on the slope parameter of each frequency domain interval. In this way, in the signal compensation method provided in the embodiment of the present application, the terminal device obtains the slope parameter of each frequency domain interval, and performs compensation on the target signal based on the slope parameter of each frequency domain interval, so as to be closer to an ideal received signal. That is to say, under the condition that the amount of information stored/transferred is limited, the signal compensation method provided by the embodiment of the application can improve the compensation precision of the signal; under the condition that the compensation precision is the same as that in the related art, the signal compensation method provided by the embodiment of the application can store/transmit less information quantity, so that the storage overhead is saved. In this way, the relationship between the compensation accuracy and the amount of information stored/transferred is effectively balanced.

For example, referring to the service scenario diagram shown in fig. 2, the target signal compensated by using the signal compensation method provided in the embodiment of the present application may serve as two modules, namely a Demodulation and Detection (DMD) module and a Cell Search and Measurement (CSM) module in the Modem. Specifically, the target signal enters the Modem 21 after undergoing frequency domain damage of the radio frequency link and frequency domain damage of the ADC device. The target signal entering the Modem 21 can go through two channels, one of which is the channel formed by the DFT/FFT module and the DMD module. The other channel is a channel formed by a digital link damage module, a DFT/FFT module and a CSM module.

In some embodiments, the implementation subject of the signal compensation method provided by the embodiments of the present application may be a DFT/FFT module.

For example, in a channel formed by the DFT/FFT module and the DMD module, the DFT/FFT module may convert a received target signal from a time domain signal to a frequency domain signal, and further, the DFT/FFT module performs frequency domain compensation on the time-frequency converted target signal by using the signal compensation method provided by the present application to obtain a compensated target signal, and sends the compensated target signal to the DMD module for subsequent baseband processing.

In a channel formed by the digital link damage module, the DFT/FFT module and the CSM module, after receiving a target signal, the digital link damage module can perform down-sampling and filtering processing on the target signal and transmit the processed target signal to the DFT/FFT module. The DFT/FFT module can convert a received target signal from a time domain signal to a frequency domain signal, and further, the DFT/FFT module performs frequency domain compensation on the time-frequency converted target signal by adopting the signal compensation method provided by the application to obtain a compensated target signal, and sends the compensated target signal to the CSM module for subsequent baseband processing.

In some embodiments, the main body for implementing the signal compensation method provided by the embodiments of the present application may be a DMD module or a CSM module.

For example, in a channel formed by the DFT/FFT module and the DMD module, the DFT/FFT module may convert a received target signal from a time domain signal to a frequency domain signal, and transmit the time-frequency converted target signal to the DMD module. Therefore, the DMD module can perform frequency domain compensation on the received target signal by adopting the signal compensation method provided by the application to obtain a compensated target signal, and then perform subsequent baseband processing on the compensated target signal.

In a channel formed by the digital link damage module, the DFT/FFT module and the CSM module, after receiving a target signal, the digital link damage module can perform down-sampling and filtering processing on the target signal and transmit the processed target signal to the DFT/FFT module. The DFT/FFT module may convert the received target signal from a time domain signal to a frequency domain signal and transmit the time-frequency converted target signal to the CSM module. In this way, the CSM module may perform frequency domain compensation on the received target signal by using the signal compensation method provided by the present application to obtain a compensated target signal, and then perform subsequent baseband processing on the compensated target signal.

It can be understood that the signal compensation method provided by the embodiment of the present application can be applied to an information interaction process between a network device and a terminal device, that is, an online phase, where a modem can perform real-time frequency domain compensation on a received target signal. Specifically, the method may be applied to a network device in a wireless communication system, and may also be applied to a terminal device in the wireless communication system, and the following discussion takes the terminal device as an example for description.

Fig. 5 is a schematic flow chart of an implementation of a signal compensation method according to an embodiment of the present application, and as shown in fig. 5, the method may include steps 510 and 520:

step 510, obtaining a slope parameter corresponding to each frequency domain interval in a plurality of frequency domain intervals; the slope parameter of each frequency domain interval is determined based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; the at least two sampling points and the corresponding ideal compensation values thereof satisfy an ideal compensation function, and the ideal compensation function is used for indicating the correlation between the sampling points in the frequency domain and the frequency domain compensation values of the target signal.

And 520, compensating the signal value of the target signal by using the slope parameter corresponding to each frequency domain interval.

It should be noted that the frequency domain of the target signal may be divided into a plurality of frequency domain intervals, where the length of each frequency domain interval is the same or different, that is, the number of sampling points of each frequency domain interval is the same or different, which is not limited in this embodiment of the application.

In the embodiment of the application, after the terminal device receives the target signal, the slope parameter corresponding to each frequency domain interval after the frequency domain intervals are divided can be obtained.

The slope parameter corresponding to each frequency domain interval may be determined in advance according to an ideal compensation function. In a possible implementation manner, the slope parameter corresponding to each frequency domain interval may be stored data, and accordingly, obtaining the slope parameter corresponding to each frequency domain interval in the plurality of frequency domain intervals may be understood as reading the stored slope parameter corresponding to each frequency domain interval from the storage space.

For example, the slope parameter of each frequency domain interval may be determined according to the ideal compensation value corresponding to two or more sampling points in the frequency domain interval, and the ideal compensation value corresponding to the sampling point may be determined according to the ideal compensation function.

It should be understood that an ideal compensation function refers to a function that frequency-domain compensates for frequency-domain impairments caused by the target device. That is, the ideal compensation function may characterize the correlation between the sampling point in the frequency domain and the frequency domain compensation value of the target signal.

It should be understood that the target device refers to a device that causes frequency domain impairments to the received signal. The target device may be an analog filter, a digital filter, an analog-to-digital converter, a power amplifier, and the like, which is not limited in this embodiment of the present application.

In practical application, frequency domain damage generated after a target signal passes through a target device can be recovered according to a frequency response function of the target device. Furthermore, the terminal device may determine a correlation between each sampling point in the frequency domain and the frequency domain compensation value according to the frequency domain impairment, so as to obtain an ideal compensation function.

Illustratively, fig. 3 shows a spectrum 31 of an ideal received signal and a spectrum 32 of a target signal that has been impaired in the frequency domain, and an ideal compensation function 33. As can be seen from fig. 3, the frequency domain impairments have symmetry in the frequency domain of the target signal. Referring to fig. 3, the target signal may include N sampling points, wherein the distribution of the amplitudes of the target signal 32 damaged by the frequency domain at sampling points-N/2 to 0 in the frequency domain is the same as the distribution of the amplitudes of the sampling points 0 to N/2 in the frequency domain. Correspondingly, the ideal compensation function 33 also has symmetry in the frequency domain of the target signal.

Alternatively, the ideal compensation function 33 may indicate only the correlation between N/2 sampling points in the frequency domain and the frequency-domain compensation value of the target signal, where N is the number of sampling points in the ideal compensation function, and N is an even number greater than or equal to 2. The compensation values for the other N/2 samples in the frequency domain can be determined from the known N/2 samples.

Exemplary, reference is made to the frequency domain compensation diagram shown in fig. 6, wherein the horizontal axis represents the frequency domain and the vertical axis represents the amplitude domain. The dashed line 61 is an ideal compensation function. That is, the relationship between the target signal compensation value and the frequency domain samples 1 to N/2 is shown by the curve shown by the dotted line 61. The ideal compensation value corresponding to each sampling point can be determined by the dashed line 61. Taking the point a in the dashed line 61 as an example, the projection of the point a on the horizontal axis is a sampling point n, the projection of the point a on the vertical axis is h (n), and the ideal compensation value of the target signal on the sampling point n is h (n).

In the embodiment of the present application, the slope parameter corresponding to any frequency domain interval may be determined based on ideal compensation values corresponding to at least two sampling points in the current frequency domain interval; and the at least two sampling points and the corresponding ideal compensation values thereof meet the ideal compensation function.

Optionally, the at least two sampling points may be any two or more than two sampling points in the corresponding frequency domain interval, or two or more than two sampling points whose distance between two adjacent sampling points is greater than a preset distance, or sampling points located at two ends of the current frequency domain interval, which is not limited in this embodiment of the application.

It should be noted that, because the ideal compensation function is in a changing state in the frequency domain, the ideal compensation functions corresponding to different sampling points are different, and therefore, the slope parameters corresponding to different frequency domain intervals are also different.

It should be understood that the change conditions of the ideal compensation values corresponding to the plurality of sampling points in the current frequency domain interval can be characterized to a certain extent according to the slope parameters obtained by the ideal compensation functions corresponding to the at least two sampling points in the frequency domain interval. Illustratively, referring to fig. 6, fig. 6 further includes a plurality of dashed lines 63, and the plurality of dashed lines 63 may be used to distinguish the plurality of divided frequency domain intervals. In addition, a solid line 62 in fig. 6 shows a straight line formed by the slope parameter corresponding to each frequency domain section. It can be seen that the ideal compensation values corresponding to the sampling points 1,2, 3, and 4 change slowly, and the slope parameter corresponding to the frequency domain interval a is smaller, so that the straight line formed by the slope parameter corresponding to the frequency domain interval a almost coincides with the ideal compensation function 61 in the frequency domain interval a. For the frequency domain interval B, the ideal compensation value of the included sampling point is changed faster, and therefore, the slope parameter corresponding to the frequency domain interval B is larger. As can be seen from fig. 6, a straight line formed by the slope corresponding to the frequency domain interval B can represent a rule that the compensation value in the frequency domain interval B increases rapidly as the sampling point increases.

When the ideal compensation function is used to perform frequency domain compensation on the received target signal, an ideal compensation value corresponding to each frequency domain sampling point in the ideal compensation function needs to be stored. The total number of sample points here is the length of the DFT or FFT, and the precision of the compensation value usually reaches multiple bits after the decimal point. Therefore, the ideal compensation value corresponding to each frequency domain sampling point in the ideal compensation function is directly stored, which requires a large memory overhead.

Based on this, the terminal device may perform frequency domain compensation on the target signal by using the slope parameter of each frequency domain interval. The terminal device may only store the slope parameter of each frequency domain interval, and after receiving the target signal, may determine the frequency domain compensation value of each sampling point in each frequency domain interval by using the slope parameter of each frequency domain interval, and compensate the target signal based on the determined frequency domain compensation value.

Specifically, the terminal device may determine a frequency domain compensation value corresponding to the sampling point in each frequency domain interval by using the slope parameter of each frequency domain interval, and then compensate a signal value corresponding to the target signal of the sampling point based on the frequency domain compensation value of each sampling point, thereby completing the compensation of the target signal.

The frequency domain compensation values corresponding to different sampling points are different, that is, the terminal device may perform point-to-point compensation on the target signal based on the slope parameter of the frequency domain interval. Illustratively, referring to fig. 6, the ideal compensation value h (n) corresponding to the sampling point n can be determined according to the ideal compensation function (i.e., the dashed line 61). According to the slope parameter (i.e. the solid line 62) corresponding to the frequency domain interval where the sampling point n is located, the frequency domain compensation value corresponding to the sampling point n can be determined to be h _n 。

Therefore, the slope parameter of each frequency domain interval can represent the variation of the ideal compensation value of the sampling point in the corresponding frequency domain interval, so that the frequency domain compensation value of the sampling point in the corresponding frequency domain interval is determined based on the slope parameter of each frequency domain interval, and is closer to the ideal compensation value compared with the compensation value determined according to the average value of the ideal compensation values in the frequency domain interval shown in fig. 4. That is to say, in the signal compensation method provided in the embodiment of the present application, the terminal device only needs to store the slope parameter of each frequency domain interval, and performs compensation on the target signal based on the slope parameter of each frequency domain interval, so that the compensated target signal is closer to the ideal received signal. Thus, the compensation accuracy of the signal can be improved under the condition that the amount of information transmitted and stored is limited.

Optionally, before the step 510 obtains the slope parameter corresponding to each of the plurality of frequency domain intervals, the following steps may be further performed:

step 500, converting the target signal from a time domain signal to a frequency domain signal.

The terminal device needs to convert the target signal from a time domain signal to a frequency domain signal before compensating the target signal.

In this embodiment of the present application, the terminal device may convert the target signal from the time domain signal to the frequency domain signal through DFT or FFT, which is not limited in this embodiment of the present application.

In some embodiments, the frequency domain of the target signal may be divided evenly, with each frequency domain interval being of the same length. That is, the number of sampling points included in each of the plurality of frequency domain sections into which the frequency domain is divided is the same. Specifically, the terminal device may store the length of the frequency domain interval and the slope parameter corresponding to each frequency domain interval in advance. Therefore, after the terminal device receives the target signal, the target signal can be divided according to the length of the frequency domain interval to obtain a plurality of frequency domain intervals, and the target signal can be compensated according to the slope parameter corresponding to each frequency domain interval.

In other embodiments, the frequency domain of the target signal may be non-uniformly divided, and the length of each frequency domain interval may be different. That is, in a plurality of frequency domain sections into which the frequency domain is divided, data of sampling points included in each of the frequency domain sections may be different. For example, the length of the divided frequency domain section in the frequency domain where the ideal compensation function changes slowly may be larger than the length of the divided frequency domain section in the frequency domain where the ideal compensation function changes rapidly. The reason is that, in the frequency domain where the ideal compensation function changes rapidly, because the ideal compensation value of two adjacent sampling points changes greatly, the length of the frequency domain interval is properly reduced, so that the straight line formed by the slope parameters of the corresponding frequency domain interval can be closer to the ideal compensation function. Specifically, the terminal device may store the length of each frequency domain interval and the slope parameter corresponding to each frequency domain interval in advance. Therefore, after the terminal equipment receives the target signal, the target signal can be subjected to non-junit division according to the length of each frequency domain interval to obtain a plurality of frequency domain intervals, and the compensation of the target signal is realized according to the slope parameter corresponding to each frequency domain interval.

In an embodiment of the present application, referring to fig. 7, in step 520, the signal value of the target signal is compensated by using the slope parameter corresponding to each frequency domain interval, which may be implemented by:

step 5201, determining a frequency domain compensation value h of the ith sampling point in the kth frequency domain interval based on the slope parameter corresponding to the kth frequency domain interval _k,l (ii) a Wherein K is an integer greater than or equal to 1 and less than or equal to K, K is the number of a plurality of frequency domain intervals, L is an integer greater than or equal to 1 and less than or equal to L, and L is the number of sampling points in the kth frequency domain interval; compensation values corresponding to different sampling points are different;

step 5202, based on the frequency domain compensation value h _k,l Compensating a signal value corresponding to the l sampling point in the kth frequency domain interval in the target signal, and continuously determining the frequency domain compensation value h of the l +1 sampling point in the kth frequency domain interval _k,l+1 Based on the frequency-domain compensation value h _k,l+1 And compensating the signal values corresponding to the (l + 1) th sampling point in the kth frequency domain interval in the target signal until the compensation of the signal values corresponding to all the sampling points in all the frequency domain intervals in the target signal is completed.

It can be understood that the terminal device may sequentially determine the frequency domain compensation value of each sampling point in each frequency domain interval according to the slope parameter of each frequency domain interval, and compensate the signal value corresponding to the sampling point in the target signal based on the frequency domain compensation value of each sampling point until the sampling point in the entire frequency domain interval is traversed, so as to obtain the final compensated target signal.

That is, the terminal device may perform the compensation process from the 1 st sampling point in the 1 st frequency domain interval, and determine the frequency domain compensation value h of the 1 st sampling point in the 1 st frequency domain interval _1,1 And using the compensation value h _1,1 For the signal of the 1 st sampling point of the 1 st frequency domain interval of the target signalThe number value is compensated. Then, the terminal device may determine the frequency domain compensation value h of the 2 nd sampling point in the 1 st frequency domain interval _1,2 And using the determined compensation value h _1,2 The signal value of the 2 nd sampling point in the 1 st frequency domain interval of the target signal is compensated. By analogy, the terminal device can complete compensation processing on all sampling points in the 1 st frequency domain interval. Further, the terminal device may perform compensation processing on the sampling point in the 2 nd frequency domain interval point by point, and perform compensation processing on the sampling point in the 3 rd frequency domain interval point by point until compensation on all the sampling points in all the frequency domain intervals is completed.

The following describes how the terminal device determines the frequency domain compensation value of any one sampling point (e.g. the ith sampling point) in any one frequency domain interval (e.g. the kth frequency domain interval).

In one possible implementation, the target signal is divided into K frequency domain intervals, where the length of each frequency domain interval may be the same or different.

Correspondingly, in step 5201, the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval is determined based on the slope parameter corresponding to the kth frequency domain interval _k,l The method can be realized by the following steps:

the terminal device may be based on the slope parameter Δ corresponding to the kth frequency domain interval _k Frequency compensation value h corresponding to Mth sampling point in k-1 frequency domain interval _k-1,M Calculating the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval _k,l And M is the number of sampling points in the k-1 frequency domain interval.

Alternatively, fig. 8 shows another signal frequency domain amplitude compensation diagram, wherein the horizontal axis represents the frequency domain and the vertical axis represents the amplitude domain. The dashed line 81 represents the curve corresponding to the ideal compensation function h (f). The frequency domain in fig. 8 is divided into a plurality of frequency domain intervals by a plurality of dashed lines 83. In addition, a solid line 82 shows a straight line formed by the slope parameter corresponding to each frequency domain section. Referring to fig. 8, the terminal device may first determine a slope parameter Δ corresponding to the kth frequency domain interval based on the slope parameter Δ _k Obtaining the height l.delta.of the kth sampling point in the kth frequency domain interval _k . Then, the terminal device can convert l · Δ _k Frequency compensation value h corresponding to the last sampling point in the k-1 frequency domain interval, i.e. the Mth sampling point _k-1,M Adding to obtain the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval _k,l 。

It should be noted that the value of M may be the same as or different from that of L. That is to say, the number of sampling points in the kth frequency domain interval may be the same as or different from the number of sampling points in the (k-1) th frequency domain interval, which is not limited in this embodiment of the present application.

Wherein, the frequency domain compensation value h of the last and one sampling point of the k-1 frequency domain interval _k-1,M May be based on the slope parameter Δ corresponding to the k-1 frequency domain interval _k-1 Frequency compensation value h corresponding to the J sampling point in the k-2 frequency domain interval _k-2,J And determining, wherein J is the number of sampling points of the (k-2) th frequency domain interval.

Specifically, the terminal device may be based on the slope parameter Δ corresponding to the k-1 frequency domain interval _k-1 Calculating the height M.delta.of the last sampling point in the k-1 frequency domain interval in the frequency domain interval _k-1 . Then, the terminal device can convert M.DELTA. _k-1 Frequency compensation value h corresponding to the last sampling point in the k-2 frequency domain interval, i.e. the J-th sampling point _k-2,J Adding to obtain the frequency domain compensation value h of the last sampling point in the k-1 frequency domain interval _k-1,M 。

It should be noted that, the value of J may be the same as or different from the values of L and M, and this is not limited in this embodiment of the application.

Further, the frequency compensation value h corresponding to the J-th sampling point in the k-2 frequency domain interval _k-2,J May be based on the slope parameter Δ corresponding to the k-2 frequency domain interval _k-1 And the frequency compensation value corresponding to the last sampling point in the k-3 frequency domain interval is determined in a manner of determining h _k-2,J In the same manner, the description is omitted here.

By analogy, the frequency domain compensation value of the Q-th sampling point in the 2 nd frequency domain interval can be the baseSlope parameter Δ in the 2 nd bin ₂ And determining the frequency domain compensation value of the No. 1 sampling point in the frequency domain interval. Wherein, Q is the number of sampling points in the 2 nd frequency domain interval, and P is the number of sampling points in the 1 st frequency domain interval. And, the frequency domain compensation value of the P-th sampling point of the 1 st frequency domain interval may be based on the slope parameter Δ of the 1 st frequency domain interval ₁ And a reference value H (0) of the frequency domain compensation value. H (0) is understood to be an ideal offset value of sampling point 0, and H (0) is usually 1. Alternatively, H (0) may be stored in the local storage space in advance.

The following describes a compensation process of the terminal device for the target signal in conjunction with an example.

First, the terminal device may perform compensation processing on the sampling point in the 1 st frequency domain interval. Wherein, the slope parameter of the 1 st frequency domain interval is delta ₁ . In addition, the length of the 1 st frequency domain interval is P, where P is an integer greater than 0, i.e., the number of sampling points in the 1 st frequency domain interval is P.

In particular, the terminal device may be based on the slope parameter Δ of the 1 st frequency domain interval ₁ And H (0), determining a frequency domain compensation value of the 1 st sampling point in the 1 st frequency domain interval. Fig. 9 shows a schematic diagram of a signal frequency domain amplitude compensation, in which the horizontal axis represents the frequency domain and the vertical axis represents the amplitude domain. The dashed line 91 represents the corresponding curve for the ideal compensation function h (f). The frequency domain in fig. 9 is divided into a plurality of frequency domain bins by a plurality of dashed lines 93. In addition, a solid line 92 shows a straight line formed by the slope parameter corresponding to each frequency domain section. Referring to fig. 9, the frequency domain compensation value h of the 1 st sampling point (i.e., point 1,1) in the 1 st frequency domain interval _1,1 Is 1. delta ₁ + H (0). Further, the terminal device may utilize the calculated h _1,1 And compensating the signal value of the 1 st sampling point in the 1 st frequency domain interval in the target signal. In particular, the terminal device may multiply h by the multiplication unit _1,1 And multiplying the signal value of the 1 st sampling point in the 1 st frequency domain interval in the target signal to complete the frequency domain compensation of the 1 st sampling point in the 1 st frequency domain interval.

Completing the frequency domain complement of the 1 st sampling point in the 1 st frequency domain intervalAfter compensation, the terminal device may base the slope parameter Δ of the 1 st frequency domain interval on ₁ And H (0), determining the frequency domain compensation value H of the 2 nd sampling point (i.e. point 1,2) in the 1 st frequency domain interval _1,2 . Specifically, referring to fig. 9, the frequency domain compensation value h of the 2 nd sampling point in the 1 st frequency domain interval _1,2 May be 2. delta ₁ + H (0). The terminal equipment can utilize the calculated h _1,2 And compensating the signal value of the 2 nd sampling point in the 1 st frequency domain interval in the target signal.

By analogy, the terminal device may determine the frequency domain compensation values of other sampling points in the 1 st frequency domain interval based on the above manner, and complete the compensation of the corresponding sampling point in the target signal. For example, the frequency domain compensation value h of the ith sampling point in the 1 st frequency domain interval _1,i May be i.Δ ₁ + H (0), terminal equipment can utilize H _1,i And compensating the signal value of the ith sampling point of the 1 st frequency domain interval corresponding to the target signal, wherein i is an integer which is more than or equal to 2 and less than or equal to P. In addition, the frequency domain compensation value h of the last sampling point in the 1 st frequency domain interval _1,P May be P.DELTA. ₁ + H (0), terminal equipment can utilize H _1,P And compensating the signal value of the most sampling point of the 1 st frequency domain interval corresponding to the target signal.

Then, after the compensation of all the sampling points in the 1 st frequency domain interval in the target signal is completed, the terminal device may continue to perform the compensation processing on the 2 nd frequency domain interval. Wherein, the slope parameter of the 2 nd frequency domain interval is delta ₂ . In addition, the length of the 2 nd frequency domain interval is Q, Q is an integer greater than 0, that is, the number of sampling points in the 2 nd frequency domain interval is Q.

The length P of the 1 st frequency domain section and the length Q of the 2 nd frequency domain section may be the same or different.

In this embodiment, the terminal device may determine the slope parameter Δ based on the 2 nd frequency domain interval ₁ And h _1,P And determining the frequency domain compensation value of the 1 st sampling point in the 2 nd frequency domain interval. Referring to FIG. 9, the frequency domain compensation value h of the 1 st sampling point in the 2 nd frequency domain interval _2,1 Is 1. delta ₂ +h _1,P . Wherein, according to the above, h _1,P May be P.DELTA. ₁ + H (0), that is, H _2,1 Can also be expressed as 1. delta ₂ +PΔ ₁ +H(0)。

Further, the terminal device may utilize the calculated h _2,1 And compensating the signal value of the 1 st sampling point in the 2 nd frequency domain interval in the target signal. That is, the terminal device can multiply h by the multiplication unit _2,1 And multiplying the signal value of the 1 st sampling point in the 2 nd frequency domain interval in the target signal to complete the frequency domain compensation of the 1 st sampling point in the 2 nd frequency domain interval.

The terminal device may then base the slope parameter Δ on the 2 nd frequency domain interval ₂ And h _1,P And determining the frequency domain compensation value of the 2 nd sampling point in the 2 nd frequency domain interval. Referring to FIG. 9, the frequency domain compensation value h of the 1 st sampling point in the 2 nd frequency domain interval _2,1 Is 2. delta ₂ +h _1,P . Further, the terminal device may utilize the calculated h _2,1 And compensating the signal value of the 1 st sampling point in the 2 nd frequency domain interval in the target signal.

By analogy, the terminal device may determine the frequency domain compensation values of other sampling points in the 2 nd frequency domain interval based on the above manner, and complete the compensation of the corresponding sampling point in the target signal. Further, after the compensation of all the sampling points in the 2 nd frequency domain interval in the target signal is completed, the terminal device may continue to perform compensation processing on the sampling points in other frequency domain intervals until the compensation of all the sampling points in each of the K frequency domain intervals is completed.

Therefore, in the signal compensation method provided by the embodiment of the application, the terminal device may only store and transmit the K slope parameters and the number of sampling points in each frequency domain interval, and perform point-by-point compensation on the target signal through the slope parameters corresponding to each frequency domain interval, where different sampling points in the same frequency domain interval may use different frequency domain compensation values for compensation. Compared with the related signal compensation technology shown in fig. 4, in the way that different sampling points in the same frequency domain interval are compensated by using the same frequency domain compensation value, a slope parameter can characterize the change condition of an ideal compensation function to a certain extent, so that the frequency domain compensation value of the sampling point in the corresponding frequency domain interval is determined by using the slope parameter and is closer to the ideal compensation value, and thus, the compensation precision of the target signal can be improved.

In another possible implementation manner, the target signal is divided into K frequency domain intervals, where the length of each frequency domain interval is the same (it can also be understood that the number of sampling points of each frequency domain interval is the same), and where the number of sampling points of each frequency domain interval is L.

Correspondingly, in step 5201, based on the slope parameter corresponding to the kth frequency domain interval, the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval is determined _k,l The method can be realized by the following steps:

the terminal device may determine the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval based on the first operational relationship shown in formula (3) _k,l 。

Wherein H (0) is the reference value of the frequency domain compensation value, Delta _k And the slope parameter is corresponding to the kth frequency domain interval.

It is understood that l.DELTA. _k It can be understood as the height of the ith sample point in the kth frequency domain interval in the frequency domain interval.

Can be decomposed into H (0) + LΔ ₁ +LΔ ₂ +···+LΔ _k-1 . That is to say that the temperature of the molten steel is,

it can be understood as the sum of the heights of the last sample point of each frequency domain interval in the k-1 frequency domain intervals before the k-th frequency domain interval in the corresponding frequency domain interval.

Illustratively, each frequency domain interval has a length L of 4. When k is 1 and l is 3, ginsengReferring to FIG. 9, the frequency-domain compensation value h of the 3 rd sampling point in the 1 st frequency-domain interval _3,2 ＝H(0)+3·Δ ₁ . When k is 3 and l is 2, referring to fig. 9, the frequency domain compensation value h of the 2 nd sampling point in the 3 rd frequency domain interval is shown _3,2 ＝H(0)+4·(Δ ₁ +Δ ₂ )+2·Δ ₃ 。

Therefore, in the signal compensation method provided by the embodiment of the application, the terminal device may only store and transmit the K slope parameters and the length L of the frequency domain interval, and the target signal is compensated point by point through the slope parameter corresponding to each frequency domain interval, wherein different sampling points in the same frequency domain interval may be compensated using different frequency domain compensation values. Compared with the related signal compensation technology shown in fig. 4, the compensation precision is improved in a manner that different sampling points in the same frequency domain interval are compensated by using the same frequency domain compensation value. Meanwhile, when the compensation accuracy of the related signal compensation technique shown in fig. 4 is the same, the amount of information stored and transmitted by the terminal device in the signal compensation method provided by the embodiment of the present application is less than the amount of information required to be stored and transmitted by the related technique shown in fig. 4, and the storage space of the terminal device can be greatly saved.

Fig. 10 is a schematic view of an implementation flow of a method for determining frequency-domain compensation data according to an embodiment of the present application, as shown in fig. 9, the method may include the following steps 1010 to 1030:

step 1010, determining a plurality of frequency domain intervals.

Step 1020, acquiring ideal compensation values corresponding to at least two sampling points in each frequency domain interval based on an ideal compensation function; the ideal compensation function is used for indicating the correlation between the sampling point in the frequency domain and the frequency domain compensation value of the target signal.

Step 1030, determining a slope parameter corresponding to each frequency domain interval based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; and the slope parameter corresponding to each frequency domain interval is used for compensating the signal value of the target signal.

In practical application, when performing frequency domain compensation on a received target signal based on an ideal compensation function, the ideal compensation value of each frequency domain sampling point in the ideal compensation function needs to be stored. The total number of sample points here is the length of the DFT or FFT, and the precision of the compensation value usually reaches multiple bits after the decimal point. Therefore, the ideal compensation value corresponding to each frequency domain sampling point in the ideal compensation function is directly stored, which requires a large memory overhead.

Based on this, the embodiment of the present application may perform segmentation processing on the frequency domain of the ideal compensation function (the same as the frequency domain of the target signal), so as to obtain a plurality of frequency domain intervals. Further, the slope parameter of each frequency domain interval is calculated and stored according to the variation condition of the ideal compensation function in each frequency domain interval, so that after the terminal device receives the target signal in the on-line calculation stage, the signal values of a plurality of sampling points included in the frequency domain interval corresponding to the target signal can be compensated based on the slope parameter of each frequency domain interval.

Specifically, the terminal device may determine a slope parameter corresponding to each frequency domain interval based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval. The ideal compensation value corresponding to the sampling point in each frequency domain interval can be determined according to an ideal compensation function.

It should be understood that, if the number of the at least two sampling points is 2, the terminal device may calculate a difference between the corresponding ideal compensation values of the two sampling points in the frequency domain interval, and further, divide the difference by the distance between the two sampling points to obtain a slope parameter corresponding to the frequency domain interval. If the number of the sampling points is greater than 2, the terminal device may determine an initial slope between two adjacent sampling points to obtain a plurality of initial slopes, and then the terminal device may average the plurality of initial slopes to obtain a final slope parameter of the frequency domain interval. The terminal device may also determine the slope parameter of each frequency domain interval by using other manners, which is not limited in this embodiment of the present application.

It should be noted that the at least two sampling points may be any two or more sampling points in the corresponding frequency domain interval, may also be two or more sampling points whose distance between the sampling points is greater than a preset distance, and may also be sampling points located at two ends of the current frequency domain interval, which is not limited in this application.

In some embodiments, the terminal device may uniformly segment the frequency domain of the ideal compensation function to obtain the plurality of frequency domain intervals. That is, the length of each frequency domain interval after segmentation is the same, that is, the number of sampling points in each frequency domain interval is the same.

Illustratively, the terminal device uniformly divides the frequency domain of the ideal compensation function into K segments to obtain K frequency domain intervals. Each frequency domain interval has a length L, that is, the number of sampling points included in each frequency domain interval is L. Based on this, the terminal device may determine the slope parameter of any one frequency domain section (e.g., the k-th frequency domain section) according to the second operational relationship shown in the following formula (4).

Wherein, Delta _k Is the slope parameter of the kth frequency domain interval, and N is the total number of sampling points on the frequency domain in the ideal compensation function. Wherein the content of the first and second substances,

and h (lk) can be understood as the ideal compensation value for the last sample point in the k-th frequency domain interval,

and H (L (k-1)) can be understood as the ideal compensation value for the last sample point in the (k-1) th frequency domain interval.

Illustratively, referring to fig. 9, the terminal device uniformly divides the frequency domain of the ideal compensation function into 3 segments, and the length L of each frequency domain interval is 4. Wherein, the slope parameter Delta of the 1 st frequency domain interval ₁ Can be that

Slope parameter Δ for 2 nd frequency domain interval ₂ Can be

Slope parameter Δ for the 3 rd frequency domain interval ₃ Can be

In other embodiments, the terminal device may also perform non-uniform segmentation on the frequency domain of the ideal compensation function to obtain the plurality of frequency domain intervals. Wherein, the length of each frequency domain interval after segmentation is different. For example, the length of the divided frequency domain section in the frequency domain where the ideal compensation function changes slowly may be larger than the length of the divided frequency domain section in the frequency domain where the ideal compensation function changes rapidly. The reason is that, in the frequency domain where the ideal compensation function changes rapidly, because the ideal compensation value of two adjacent sampling points changes greatly, the length of the frequency domain interval is properly reduced, so that the straight line formed by the slope parameters of the corresponding frequency domain interval can be closer to the ideal compensation function. Specifically, the terminal device may store the length of each frequency domain interval and the slope parameter corresponding to each frequency domain interval in advance. Therefore, after the terminal equipment receives the target signal, the target signal can be subjected to non-junit division according to the length of each frequency domain interval to obtain a plurality of frequency domain intervals, and the compensation of the target signal is realized according to the slope parameter corresponding to each frequency domain interval.

In some embodiments, the impairments to the signal spectrum caused by different physical devices are not the same. That is, the ideal compensation functions for different physical devices are different. Therefore, a plurality of frequency domain sections corresponding to the physical device, and a slope parameter of each frequency domain section may be set for different physical devices. After the terminal device determines which devices the target signal passes through, the slope parameter of each frequency domain interval in a plurality of frequency domain intervals corresponding to the devices can be obtained from the storage space, and the received target signal is compensated.

For example, referring to the service scenario diagram shown in fig. 2, when the Modem in the terminal device processes the target signal in the DMD module, it may be determined that the target signal has passed through the radio frequency link module and the ADC module. Therefore, the slope parameter of each of the plurality of frequency domain intervals corresponding to the radio frequency link module and the slope parameter of each of the plurality of frequency domain intervals corresponding to the ADC module can be obtained from the storage space. In this way, the Modem may compensate the target signal based on the slope parameter of each of the plurality of frequency domain intervals corresponding to the radio frequency link module and the slope parameter number of each of the plurality of frequency domain intervals of the ADC module.

In addition, when the Modem processes the target signal at the CSM module, the Modem can determine that the signal has undergone the radio frequency link module, the ADC module and the digital link damage module. Therefore, the Modem can obtain the slope parameter of each of the plurality of frequency domain intervals corresponding to the radio frequency link module, the slope parameter of each of the plurality of frequency domain intervals corresponding to the ADC module, and the slope parameter of each of the plurality of frequency domain intervals corresponding to the digital link impairment module. Furthermore, the target signal is compensated based on the slope parameter of each of the plurality of frequency domain sections corresponding to the radio frequency link module, the slope parameter of each of the plurality of frequency domain sections corresponding to the ADC module, and the slope parameter of each of the plurality of frequency domain sections corresponding to the digital link impairment module.

To sum up, the signal compensation method provided in the embodiment of the present application may divide the frequency domain intervals in advance, and determine the slope parameter of each frequency domain interval. In this way, the modem can perform compensation processing on the target signal based on the slope parameter of each frequency domain interval. Therefore, the compensation precision of the target signal is improved on the premise of a certain amount of stored and transmitted information.

The signal compensation method provided in the embodiment of the present application is explained in detail with reference to the service scenario diagram shown in fig. 2 and the implementation flow diagram of the signal compensation method shown in fig. 11. As shown in fig. 11, the method may include the following steps 1110 to 1130:

step 1110, converting the received target signal from a time domain signal to a frequency domain signal.

In some embodiments, referring to fig. 2, in the channel formed by the DFT/FFT module and the DMD module, the target signal enters the DFT/FFT module after passing through the rf link module and ADC conversion. The DFT/FFT module may perform DFT or FFT processing on the time domain signal to convert the target signal from the time domain to the frequency domain.

In other embodiments, referring to fig. 2, in the channel formed by the digital link impairment module, the DFT/FFT module and the CSM module, the target signal enters the DFT/FFT module after passing through the ADC module and the digital link impairment module. The DFT/FFT module may perform DFT or FFT processing on the target signal to convert the target signal from the time domain to the frequency domain.

Step 1120, obtaining a slope parameter corresponding to each frequency domain interval in a plurality of frequency domain intervals; the slope parameter corresponding to each frequency domain interval is determined based on the ideal compensation values corresponding to at least two sampling points in each frequency domain interval; the at least two sampling points and the corresponding ideal compensation values thereof satisfy an ideal compensation function, and the ideal compensation function is used for indicating the correlation between the sampling points in the frequency domain and the frequency domain compensation values of the target signal.

Step 1130, the signal value of the target signal is compensated by using the slope parameter corresponding to each frequency domain interval.

In some embodiments, referring to fig. 2, in the channel formed by the DFT/FFT module and the DMD module, the Modem may obtain, from the storage space, the slope parameter of each of the plurality of frequency domain intervals corresponding to the rf link module, and the slope parameter of each of the plurality of frequency domain intervals corresponding to the ADC module.

Further, the Modem may perform first compensation processing on the target signal based on a plurality of slope parameters corresponding to the radio frequency link module, perform second compensation processing on the target function after the first compensation processing based on a plurality of slope parameters corresponding to the ADC module, and obtain a final compensated target signal, and the Modem may send the final compensated target signal to the DMD module for subsequent baseband processing.

In other embodiments, referring to fig. 2, in the channel formed by the digital link impairment module, the DFT/FFT module and the CSM module, the Modem may obtain, from the storage space, a slope parameter of each of a plurality of frequency domain intervals corresponding to the radio frequency link module, a slope parameter of each of a plurality of frequency domain intervals corresponding to the ADC module, and a slope parameter of each of a plurality of frequency domain intervals corresponding to the digital link impairment module. In this way, the Modem may perform first compensation processing on the target signal based on the multiple slope parameters corresponding to the radio frequency link module, then the Modem may perform second compensation processing on the target signal after the first compensation processing based on the multiple slope parameters corresponding to the ADC module, and finally the Modem may perform third compensation processing on the target signal after the second compensation processing based on the multiple slope parameters corresponding to the digital link damage module to obtain a final compensated target signal. Further, the Modem may send the target signal after the compensation process to the CSM module for subsequent baseband processing.

It should be noted that the description of the method embodiment corresponding to fig. 11 is similar to the description of the other method embodiments, and has similar beneficial effects to the other method embodiments. For technical details not disclosed in the method embodiment corresponding to fig. 11, please refer to the description of the other method embodiments above for understanding.

The signal compensation method provided by the embodiment of the present application is described in detail below with reference to specific application scenarios.

Specifically, referring to the schematic flow chart of the signal compensation method shown in fig. 12, the signal compensation method provided in the embodiment of the present application may be implemented by the offline calculation part a and the online use part B.

In the offline calculation part a, the terminal device may perform the following steps:

and step A1, acquiring a frequency response function of the target device.

And A2, determining an ideal compensation function corresponding to the sampling point 1 to the sampling point N/2 according to the frequency response function of the target device.

Specifically, the frequency domain damage caused by the target device to the target signal can be determined according to the frequency response function of the target device, so that the ideal compensation function corresponding to each sampling point in the frequency domain is determined based on the frequency domain damage.

The ideal compensation function has symmetry, and as shown in fig. 6, only the ideal compensation function corresponding to sample point 1 to sample point N/2 in the frequency domain may be obtained.

Step A3, dividing the frequency domain of the ideal compensation function into K frequency domain intervals.

That is, the frequency domain of the ideal compensation function corresponding to sample point 1 to sample point N/2 is divided into K frequency domain intervals.

Alternatively, the terminal device may uniformly divide the frequency domain of the ideal compensation function into K frequency domain intervals, each frequency domain interval having a length L, where L · K ═ N/2.

Step A4, determining a slope parameter corresponding to each frequency domain interval based on the ideal compensation values corresponding to at least two sampling points in each frequency domain interval.

The terminal device may calculate a slope parameter corresponding to each frequency domain interval by using the above formula (4).

And A5, storing the slope parameter corresponding to each frequency domain interval.

The terminal device may also store the number of frequency domain intervals.

Further, in the online calculation section B, the terminal device may perform the steps of:

and step B1, acquiring the slope parameter corresponding to each frequency domain interval.

Step B2, calculating the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval based on the slope parameter corresponding to the kth frequency domain interval _k,l 。

Alternatively, when the length of each frequency domain interval is the same, the terminal device may calculate h by using the above equation (3) _k,l 。

Step B3 based on h _k,l And compensating the signal value of the ith sampling point in the kth frequency domain interval.

Based on step B2 and step B3, the terminal device can perform compensation processing on each sample point within each frequency domain interval. Further, the modem can also use the symmetry to complete the compensation process of the other half of the target signal.

Therefore, the signal compensation method provided by the embodiment of the application is provided. On one hand, the signal compensation method provided by the embodiment of the application can save the storage space on the premise of ensuring the compensation precision. On the other hand, the compensation accuracy can be high on the basis of storing the same data amount.

Taking a signal with a sampling point number N of 4096 as an example, a comparison between the scheme provided by the embodiment of the present application and the related technical scheme is shown in table 1 below:

TABLE 1

With reference to the contents shown in the second column and the fifth column of table 1, under the condition of similar compensation accuracy (the compensation accuracy of the scheme provided by the embodiment of the present application is-49.27, and the compensation accuracy of the related art scheme is-45.60), the amount of information that needs to be stored/transmitted by the scheme provided by the embodiment of the present application is one eighth of the amount of information to be stored/transmitted (16/128), that is, the compensation accuracy achieved by dividing the frequency domain into 128 frequency domain intervals in the related art scheme, the same compensation accuracy can be achieved by using the method provided by the embodiment of the present application only by dividing the frequency domain into 16 frequency domain intervals. Therefore, compared with the related technical scheme, the scheme provided by the embodiment of the application greatly saves the storage space.

With reference to the contents shown in the second column and the fourth column of table 1, under the condition of the same number of data stored/transferred, the solution provided in the embodiment of the present application improves the compensation accuracy by about 18.73dB compared with the related art solution.

An embodiment of the present application provides a signal compensation apparatus, which may be a terminal device or a network device serving as a signal receiving end, or may be a chip (e.g., a Modem chip, a system on chip (system on chip), etc.) used for performing frequency domain compensation in the terminal device or the network device.

Fig. 13 is a schematic structural diagram of a signal compensation apparatus according to an embodiment of the present application, and as shown in fig. 13, the apparatus may include:

a first obtaining unit 1301 configured to obtain a slope parameter corresponding to each of a plurality of frequency domain intervals; the slope parameter corresponding to each frequency domain interval is determined based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; the at least two sampling points and the corresponding ideal compensation values thereof meet an ideal compensation function, and the ideal compensation function is used for indicating the correlation between the sampling points in the frequency domain and the frequency domain compensation values of the target signals;

a signal compensation unit 1302, configured to compensate the signal value of the target signal by using the slope parameter corresponding to each frequency domain interval.

In some embodiments of the present application, the number of sampling points included in each frequency domain interval is the same.

In some embodiments of the present application, the signal compensation unit 1302 is further configured to determine a frequency domain compensation value h of an ith sampling point in a kth frequency domain interval based on a slope parameter corresponding to the kth frequency domain interval _k,l (ii) a K is an integer which is greater than or equal to 1 and less than or equal to K, K is the number of the plurality of frequency domain intervals, L is an integer which is greater than or equal to 1 and less than or equal to L, and L is the number of sampling points in the kth frequency domain interval; frequency domain compensation value h of the ith sampling point based on the kth frequency domain interval _k,l And compensating a signal value corresponding to the ith sampling point of the kth frequency domain interval in the target signal.

In some embodiments of the present application, the signal compensation unit 1302 is further configured to compensate the frequency compensation value h based on the slope parameter corresponding to the kth frequency domain interval and the frequency compensation value h corresponding to the mth sampling point in the kth-1 frequency domain interval _k-1,M Calculating the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval _k,l And M is the number of sampling points of the (k-1) th frequency domain interval.

In some embodiments of the present application, a frequency compensation value h corresponding to the mth sampling point in the (k-1) th frequency domain interval _k-1,M Is based on the corresponding slope of the k-1 frequency domain intervalFrequency compensation value h corresponding to the rate parameter and the J sampling point in the k-2 frequency domain interval _k-2,J Determining, wherein J is the number of sampling points of the (k-2) th frequency domain interval;

frequency domain compensation value h corresponding to the No. P sampling point in the No. 1 frequency domain interval _1,P And determining based on the slope parameter of the 1 st frequency domain interval and H (0), wherein H (0) is a reference value of the frequency domain compensation value.

In some embodiments of the present application, the number of the sampling points included in each frequency domain interval is L, and the signal compensation unit 1302 is further configured to determine the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval based on a first operation relation _k,l The first operational relationship satisfies the following formula:

In some embodiments of the present application, the signal compensation apparatus further includes a conversion unit configured to convert the target signal from a time-domain signal to a frequency-domain signal.

An embodiment of the present application provides a frequency domain compensation data determining apparatus, which may perform the frequency domain compensation data determining method provided in any of the above embodiments. The frequency domain compensation data generated by the apparatus may include slope parameters corresponding to the plurality of frequency domain intervals.

For example, fig. 14 is a schematic structural diagram of a frequency domain compensation data determining apparatus provided in an embodiment of the present application, and as shown in fig. 14, the apparatus may include:

a determining unit 1401 configured to determine a plurality of frequency domain intervals;

a second obtaining unit 1402 configured to obtain ideal compensation values corresponding to at least two sampling points in each frequency domain interval; the ideal compensation function is used for indicating the correlation between the sampling point in the frequency domain and the frequency domain compensation value of the target signal;

the determining unit 1401 is further configured to determine a slope parameter corresponding to each frequency domain interval based on ideal compensation values corresponding to at least two sampling points in each frequency domain interval; and the slope parameter corresponding to each frequency domain interval is used for compensating the signal value of the target signal.

In some embodiments of the present application,

the determining unit 1401 is further configured to uniformly segment a frequency domain, resulting in the plurality of frequency domain intervals; wherein, the number of sampling points in each frequency domain interval is the same.

It should be noted that each functional unit in this embodiment may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The integrated module, if implemented in the form of a software functional module and not sold or used as an independent product, may be stored in a computer readable storage medium, and based on such understanding, a part of the technical solution of the present embodiment that essentially contributes to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, which includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

As shown in fig. 15, the modem provided in this embodiment of the present application may include a processor 1501 and a memory 1502 storing executable instructions of the processor.

Illustratively, processor 1501 may include a digital link impairment module, a DFT/FFT module, a DMD module, and a CSM module. The digital link damage module is used for carrying out down-sampling and filtering processing on the target signal and filtering an interference signal. The DFT/FFT module is used to convert the target signal from the time domain to the frequency domain in order to obtain a baseband signal. The DMD module is used for demodulating and detecting the baseband signal. The CSM module is used for carrying out cell search and measurement according to the baseband signals.

The processor 1501 and the memory 1502 communicate via a communication bus 1503;

the processor 1501, when executing the computer program stored in the memory 1502, may execute the following instructions:

In some embodiments of the present application, the processor 1501, when executing the computer program stored in the memory 1502, may further execute the following instructions:

determining a frequency domain compensation value h of an l sampling point in a k frequency domain interval based on a slope parameter corresponding to the k frequency domain interval _k,l (ii) a K is an integer which is greater than or equal to 1 and less than or equal to K, K is the number of the plurality of frequency domain intervals, L is an integer which is greater than or equal to 1 and less than or equal to L, and L is the number of sampling points in the kth frequency domain interval; frequency domain compensation value h of the ith sampling point based on the kth frequency domain interval _k,l Compensating a signal value corresponding to the ith sampling point in the kth frequency domain interval in the target signal until the target signal is subjected to compensationAnd the compensation is completed on the signal values corresponding to all sampling points in all frequency domain intervals in the signal.

In some embodiments of the present application, the processor 1401, when executing the computer program stored in the memory 1402, may further execute the following instructions:

based on the slope parameter corresponding to the kth frequency domain interval and the frequency compensation value h corresponding to the Mth sampling point in the kth-1 frequency domain interval _k-1,M Calculating the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval _k,l . Wherein M is the number of sampling points of the (k-1) th frequency domain interval.

In some embodiments of the present application, the number of sampling points included in each frequency domain interval is L, and the processor 1401, when executing the computer program stored in the memory 1402, may further execute the following instructions:

determining a frequency domain compensation value h of the ith sampling point in the kth frequency domain interval based on a first operational relation _k,l The first operational relationship satisfies the following formula:

In some embodiments of the present application, the processor 1501, when executing the computer program stored in the memory 1502, may further execute the following instructions: and converting the target signal from a time domain signal to a frequency domain signal.

determining a plurality of frequency domain bins;

uniformly segmenting the frequency domain to obtain a plurality of frequency domain intervals; wherein, the number of sampling points in each frequency domain interval is the same.

In the embodiment provided in the present Application, the Processor 1501 may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), and a controller. It is understood that the electronic devices for implementing the above processor functions may be other devices, and the embodiments of the present application are not limited in particular.

In practical applications, the Memory 1502 may be a volatile Memory (volatile Memory), such as a Random-Access Memory (RAM); or a non-volatile Memory (non-volatile Memory), such as a Read-Only Memory (ROM), a flash Memory (flash Memory), a Hard Disk (Hard Disk Drive, HDD) or a Solid-State Drive (SSD); or a combination of the above types of memories and provides instructions and data to the processor 1401.

Based on the foregoing embodiments, embodiments of the present application further provide a communication device, where the modem provided in the foregoing embodiments may be integrated in the communication device. Referring to fig. 15, the modem may include a processor 1501, and a memory 1502 storing processor-executable instructions;

the processor 1501 may call and run a computer program from the memory 1502 to implement the methods in the embodiments of the present application.

In the embodiments provided in the present application, the communication apparatus may be a receiver or a communication device. Here, the communication device may be a terminal device or a network device. The terminal device may include a UE, an access terminal, a UE unit, a UE station, a mobile station, a remote terminal, a mobile device, a UE terminal, a wireless terminal device, a UE agent, or a UE apparatus, among others. But also a cellular phone, a cordless phone, a SIP phone, a wireless local loop WLL station, a PDA, a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a drone, a wearable device, a robot, a terminal in a future 5G network or a terminal in a future evolved PLMN, etc. The terminal device may further include an IOT device, and the IOT device may include various types of sensors, an air conditioner, a washing machine, a lamp, a vehicle-mounted terminal, and the like, which is not limited in this embodiment of the present application.

The Network device may include a Base Transceiver Station (BTS) of a Global System for Mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, a Base Station (NodeB, NB) of a Wideband Code Division Multiple Access (WCDMA) System, an eNB, an Access Point (AP), or a relay Station of an LTE System, a Base Station (e.g., gbb or TRP) of a 5G System, or a wireless controller and a wearable device or a vehicle-mounted device in a Cloud Radio Access Network (CRAN) scenario. And is not limited herein.

The embodiment of the application also provides a computer storage medium, in particular a computer readable storage medium. The computer storage medium stores thereon computer instructions, and when the computer storage medium is located in an electronic device manufacturing apparatus, the computer instructions are executed by a processor to implement any step of the signal compensation method or the frequency domain compensation data determination method according to the embodiment of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or in other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or at least two units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.

Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application or portions thereof that contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.

It should be noted that: the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of signal compensation, comprising:

2. The method of claim 1, wherein the number of sample points included in each frequency domain interval is the same.

3. The method according to claim 1 or 2, wherein the compensating the signal value of the target signal by using the slope parameter corresponding to each frequency domain interval comprises:

determining a frequency domain compensation value h of an l sampling point in a k frequency domain interval based on a slope parameter corresponding to the k frequency domain interval _k,l (ii) a K is an integer which is greater than or equal to 1 and less than or equal to K, K is the number of the plurality of frequency domain intervals, L is an integer which is greater than or equal to 1 and less than or equal to L, and L is the number of sampling points in the kth frequency domain interval;

frequency domain compensation value h of the ith sampling point based on the kth frequency domain interval _k,l And compensating a signal value corresponding to the ith sampling point of the kth frequency domain interval in the target signal.

4. The method as claimed in claim 3, wherein the frequency-domain compensation value h of the ith sampling point in the kth frequency-domain interval is determined based on the slope parameter corresponding to the kth frequency-domain interval _k,l The method comprises the following steps:

based on the slope parameter corresponding to the kth frequency domain interval and the frequency compensation value h corresponding to the Mth sampling point in the kth-1 frequency domain interval _k-1,M Calculating the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval _k,l And M is the number of sampling points of the (k-1) th frequency domain interval.

5. The method of claim 4, wherein the k-1 frequency domain interval is the firstFrequency compensation value h corresponding to M sampling points _k-1,M Based on the slope parameter corresponding to the kth-1 frequency domain interval and the frequency compensation value h corresponding to the jth sampling point in the kth-2 frequency domain interval _k-2,J Determining, wherein J is the number of sampling points of the (k-2) th frequency domain interval;

frequency domain compensation value h corresponding to P-th sampling point in 1 st frequency domain interval _1,P And determining based on the slope parameter of the 1 st frequency domain interval and H (0), wherein H (0) is a reference value of the frequency domain compensation value.

6. The method according to claim 3, wherein the number of the sampling points included in each frequency domain interval is L, and the frequency domain compensation value h of the ith sampling point in the kth frequency domain interval is determined based on the slope parameter corresponding to the kth frequency domain interval _k,l The method comprises the following steps:

7. The method according to any of claims 1-3, before obtaining the slope parameter corresponding to each of the plurality of frequency-domain intervals, further comprising:

and converting the target signal from a time domain signal to a frequency domain signal.

8. A method for determining frequency domain compensation data, comprising:

determining a plurality of frequency domain intervals;

9. The method of claim 8, wherein determining the plurality of frequency domain bins comprises:

10. A signal compensation apparatus, characterized in that the apparatus comprises:

11. An apparatus for determining frequency domain compensation data, the apparatus comprising:

12. A modem, comprising a processor, and a memory storing instructions executable by the processor;

the processor and the memory are connected through a bus;

the processor, when executing the executable instructions stored in the memory, is configured to perform the steps of the signal compensation method of any one of claims 1 to 7, or the steps of the frequency domain compensation data determination method of claim 8 or 9.

13. A communication device, comprising a processor, and a memory storing instructions executable by the processor;

the processor and the memory are connected through a bus;

14. Computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the signal compensation method of any one of claims 1 to 7, or which computer program, when being executed by a processor, carries out the steps of the frequency domain compensation data determination method of claim 8 or 9.