Frequency offset compensation method and apparatus, terminal, and computer readable storage medium

Abstract

The frequency offset compensation method, device, terminal and computer readable storage medium provided by the embodiment of the present application obtain target data, obtain a target Doppler frequency offset value according to the target data, the target data includes positioning information, a carrier frequency and a motion parameter, obtain a tuning parameter of a radio frequency front end according to the target Doppler frequency offset value, tune the radio frequency front end according to the tuning parameter, and in some implementation processes, when the terminal is in high-speed movement and there is a Doppler frequency offset, a target Doppler frequency offset value is calculated according to the target data, then a value that needs to be adjusted by the radio frequency front end is obtained according to the target Doppler frequency offset value, and the optimization of dynamic adjustment of a matching network is achieved. The problem that a signal received by the terminal has a frequency difference due to a Doppler frequency offset and finally affects signal demodulation of the terminal and the bit error rate rises is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to, but are not limited to, the field of communication, in particular, relate to, but are not limited to, a frequency offset compensation method and device, a terminal and a computer readable storage medium. BACKGROUND

[0002] With the popularity of mobile communication, the network environment where the terminal is located is complex and changeable, especially when the terminal is in high-speed movement, the terminal performance will be seriously affected. For example, the Doppler effect has the greatest impact on the performance of the LTE (Long Term Evolution) system in the high-speed coverage scenario. The wavelength of the received signal changes due to the relative movement of the signal source and the receiver, which is called the Doppler effect. In a mobile communication system, especially in a high-speed scenario, this effect is particularly evident.

[0003] In the related art, the Doppler frequency offset caused by high-speed movement is optimized on the base station side, for example, from the perspective of network coverage performance, a private network is constructed, a dual-channel RRU (Remote Radio Unit) technology is used to cover the network, and a MIMO (multiple-in multiple-out) technology is used to improve the network data service rate. At the same time, multiple RRUs are used in a cell to reduce inter-cell handover and improve network performance. Or, through reasonable planning of overlapping coverage areas, timely handover is ensured, early or late handover is avoided, and ping-pong handover is avoided. By setting a handover band, the UE (User Equipment) can perform 2 handovers within the handover band, allowing the UE to perform a second handover immediately after the first handover fails.

[0004] However, in the above method, the Doppler frequency offset caused by high-speed movement is optimized on the base station side, which causes the terminal to receive a signal with a frequency difference due to the existence of the Doppler effect, and ultimately affects the terminal signal demodulation and increases the bit error rate. SUMMARY

[0005] The frequency offset compensation method, device, terminal and computer readable storage medium provided by the embodiments of the present application mainly solve the problem that in the related art, the Doppler frequency offset causes the terminal to receive a signal with a frequency difference, which ultimately affects the terminal signal demodulation and increases the bit error rate.

[0006] To solve the above technical problem, the present application provides a frequency offset compensation method, comprising:

[0007] Obtaining target data, obtaining a target Doppler frequency offset value according to the target data, the target data comprising: positioning information, carrier frequency, motion parameter;

[0008] acquire a tuning parameter of the radio frequency front end according to the target Doppler frequency offset value;

[0009] tune the radio frequency front end according to the tuning parameter.

[0010] The embodiment of the present application further provides a frequency offset compensation device, comprising:

[0011] a Doppler frequency offset value acquisition module, used for acquiring target data, and acquiring a target Doppler frequency offset value according to the target data, wherein the target data comprises positioning information, a carrier frequency and a motion parameter;

[0012] a tuning parameter acquisition module, used for acquiring a tuning parameter of the radio frequency front end according to the target Doppler frequency offset value;

[0013] a tuning module, used for tuning the radio frequency front end according to the tuning parameter.

[0014] The embodiment of the present application further provides a terminal, comprising a processor, a memory and a communication bus;

[0015] The communication bus is used for realizing connection communication between the processor and the memory;

[0016] The processor is used for executing one or more computer programs stored in the memory, so as to realize the steps of the frequency offset compensation method.

[0017] The embodiment of the present application further provides a computer storage medium, wherein the computer readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to realize the steps of the frequency offset compensation method.

[0018] The frequency offset compensation method, device, terminal and computer readable storage medium provided by the embodiment of the present application are used for acquiring target data, acquiring a target Doppler frequency offset value according to the target data, wherein the target data comprises positioning information, a carrier frequency and a motion parameter; acquiring a tuning parameter of the radio frequency front end according to the target Doppler frequency offset value; and tuning the radio frequency front end according to the tuning parameter. In some implementation processes, when the terminal exists Doppler frequency offset, the target Doppler frequency offset value is calculated according to the target data, and then the value that needs to be adjusted by the radio frequency front end is obtained according to the target Doppler frequency offset value, so that the optimization of the dynamic adjustment of the matching network is achieved. The problem that the signal received by the terminal exists frequency difference due to the Doppler frequency offset, and finally the terminal signal demodulation is affected and the bit error rate rises is solved.

[0019] Other features and corresponding advantages of the present application are described in the latter part of the specification, and it should be understood that at least part of the advantages is obvious from the description of the present application in the specification. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the basic process of the frequency offset compensation method according to Embodiment 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the basic structure of the parallel resonant network according to Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the basic process of another frequency offset compensation method according to Embodiment 2 of the present invention;

[0023] Figure 4 This is a schematic diagram of the basic structure of a frequency offset compensation device provided in Embodiment 3 of the present invention;

[0024] Figure 5 This is a schematic diagram of a basic terminal structure provided in Embodiment 3 of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the embodiments of this invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0026] Example 1:

[0027] To address the issue in related technologies where Doppler frequency offset causes a frequency difference in the signal received by the terminal, ultimately affecting terminal signal demodulation and increasing the bit error rate, please refer to [link to relevant documentation]. Figure 1 , Figure 1 The diagram shown is a basic flowchart of the frequency offset compensation method, which includes, but is not limited to:

[0028] S101. Obtain target data, and obtain the target Doppler frequency offset value based on the target data;

[0029] In some embodiments, the terminal acquires current target data, which includes: positioning information, carrier frequency, and motion parameters. The positioning information includes, but is not limited to, the terminal's latitude and longitude information. Based on the positioning information and the base station's location information, the terminal can obtain the angle between the terminal's motion direction and the incident radio wave from the base station. The motion parameters include, but are not limited to, motion speed and motion direction. It should be understood that the terminal can acquire target data in real time to obtain current target data; in some embodiments, it can also acquire target data periodically to obtain target data at a specific moment.

[0030] It needs to be understood that when the mobile terminal is in a high-speed motion state, the Doppler shift suffered by the spatial transmission wireless signal becomes very serious, and as the carrier frequency increases, the Doppler shift value increases, and the Doppler shift value is proportional to the carrier frequency and the terminal moving speed, that is:

[0031]

[0032] Wherein, f d is the Doppler shift value, f c is the carrier frequency, v is the moving speed of the terminal, a(x) is the angle between the terminal motion direction and the radio wave incident to the terminal at position x, and c represents the propagation speed of electromagnetic wave.

[0033] In some embodiments, before obtaining the target Doppler shift value, further comprising: obtaining a first Doppler shift value according to target data; obtaining the target Doppler shift value comprises: taking the first Doppler shift value as the target Doppler shift value; for example, when the terminal is at x, the terminal obtains the target data at the current x position in real time, including: the current carrier frequency f c,T , motion parameters, which include: the driving speed v T (x), the motion direction, and the current positioning information of the terminal, and then obtains the angle a(x) between the terminal motion direction and the radio wave incident to the terminal at position x, at this time, the first Doppler shift value is taken as the target Doppler shift value f D (x), the current first Doppler shift value f D (x) of the terminal at position x is:

[0034] Taking f D (x) as the target Doppler shift value.

[0035] In some embodiments, obtaining the target Doppler shift value comprises: obtaining historical target data according to the positioning information; obtaining a second Doppler shift value according to the historical target data; combining the first Doppler shift value and the second Doppler shift value to obtain the target Doppler shift value. It needs to be understood that the historical target data can be stored on the terminal side, or on the base station side, or on a separate server side, and the terminal can obtain the historical target data at the positioning information from the side where the historical target data is stored through the positioning information; for example, when the terminal is at x, the terminal obtains the historical target data at the x position from the base station side, including: the historical carrier frequency f c,HMB , historical motion parameters, which include: historical driving speed v HMB(x), the moving direction, and the current location information of the terminal, and then the included angle a(x) between the terminal moving direction and the radio wave incident to the terminal at the location x is obtained, and then the second Doppler frequency offset value f D,HMB (x) is:

[0036]

[0037] The target Doppler frequency offset value is obtained by combining the first Doppler frequency offset value and the second Doppler frequency offset value, and then the target Doppler frequency offset value f D (x) is:

[0038]

[0039] In some embodiments, after obtaining the target Doppler frequency offset value according to the target data, before obtaining the tuning parameter of the radio frequency front end according to the target Doppler frequency offset value, the method further includes: verifying the target Doppler frequency offset value according to the first Doppler frequency offset value, and when the verification fails, re-obtaining the target Doppler frequency offset value; wherein by combining historical target data, a relative Doppler frequency offset estimation value ε(x) = f D (x) / Ω is obtained as prior information, and a maximum a posteriori probability (MAP) about the relative Doppler frequency offset ε is constructed according to the received signal r, and after taking the logarithm, the formula is obtained: Wherein f(·), g(·), and p(·) are the probability density functions of the corresponding items, and ln represents the natural logarithm function. When the verification result exceeds the threshold value, the target Doppler frequency offset value needs to be re-obtained, and after obtaining the target Doppler frequency offset value meeting the expectation, the tuning parameter of the radio frequency front end is obtained.

[0040] S102, obtaining the tuning parameter of the radio frequency front end through the target Doppler frequency offset value;

[0041] In some embodiments, obtaining the tuning parameter of the radio frequency front end through the target Doppler frequency offset value includes: obtaining a target capacitance value of a variable capacitance in the radio frequency front end according to the target Doppler frequency offset value. The radio frequency front end includes but is not limited to at least one of the following: a low-noise amplifier, a power amplifier, and a filter. For example, when the radio frequency front end includes a low-noise amplifier, the center frequency of the low-noise amplifier is f when the terminal is in a stationary state, as shown in Figure 2 When the low-noise amplifier matching network is a parallel resonance network, the center frequency f of the parallel resonance circuit at this time can be obtained by the following formula:

[0042]

[0043] Wherein, L is the inductance value of the matching network in static state, and C is the capacitance value of the matching network in static state; it is to be understood that when the capacitance value of the matching network is taken as the tuning parameter, the target capacitance value C can be obtained through the target Doppler frequency offset value Doppler , that is, when the center frequency f is the target Doppler frequency offset value f D (x), then:

[0044]

[0045] Further, the target capacitance value C D required by the matching network when the center frequency f is the target Doppler frequency offset value f Doppler (x) can be obtained.

[0046] S103, tuning the radio frequency front end according to the tuning parameter.

[0047] In some embodiments, tuning the radio frequency front end according to the tuning parameter comprises changing the voltage according to the target capacitance value, and then adjusting the capacitance value of the variable capacitor to the target capacitance value; for example, by changing the control voltage, so that the variable capacitor in the low-noise amplifier parallel resonance network changes from C to the target capacitance value C Doppler . Finally, the center frequency of the low-noise amplifier parallel resonance network is the target Doppler frequency offset value f D (x), so that the radio frequency front end receiver of the terminal works in an optimal manner and is not affected by the Doppler effect caused by the high-speed movement of the terminal; it is to be understood that the variable capacitor can be an off-chip variable capacitor, or a packaged matching network, which are used in combination, and then the impedance value of the matching network is adjusted by changing the control voltage to adjust the size of the variable capacitor.

[0048] The frequency offset compensation method provided by the embodiment of the application obtains the target Doppler frequency offset value according to the target data, and the target data includes positioning information, carrier frequency, and motion parameter; obtains the tuning parameter of the radio frequency front end according to the target Doppler frequency offset value; tunes the radio frequency front end according to the tuning parameter; when the terminal is in high-speed movement and there is a Doppler frequency offset, the target Doppler frequency offset value is calculated according to the target data, and then the value required by the radio frequency front end to be adjusted is obtained according to the target Doppler frequency offset value, so as to achieve the optimization of dynamically adjusting the matching network; and the problem that the Doppler frequency offset causes the frequency difference of the signal received by the terminal and finally affects the signal demodulation of the terminal and the rise of the bit error rate is solved.

[0049] Embodiment two:

[0050] In order to better understand the application, a more specific example is provided in the embodiment to explain the above frequency offset compensation method, as shown in Figure 3 , the frequency offset compensation method comprises:

[0051] S301. Obtain target data, which includes latitude and longitude coordinates;

[0052] In some embodiments, when the terminal is in a high-speed moving state, it will be affected by Doppler frequency offset. For example, in a high-speed rail scenario, the train travels at a high speed, and the train's trajectory is fixed. In this case, the frequency offset can be compensated using the aforementioned frequency offset compensation method. In some embodiments, the terminal acquires current target data, which includes: latitude and longitude coordinates, carrier frequency, and motion parameters. Based on the terminal's current latitude and longitude coordinates and the location information of the connected base station, the terminal can obtain the angle between the terminal's motion direction and the radio wave incident on the terminal from the base station. The motion parameters include, but are not limited to, motion speed and motion direction. When the terminal is at any x position, it can obtain the latitude and longitude coordinates of that x position in real time, and then obtain the angle α(x) between the terminal's motion direction at position x and the radio wave incident on the terminal from the base station, as well as the current carrier frequency f. c,T Motion parameters, including: driving speed v T (x), direction of motion.

[0053] S302. Obtain historical target data based on latitude and longitude coordinates;

[0054] In some embodiments, the terminal obtains historical target data at location x from the base station based on the obtained latitude and longitude coordinates, including: historical carrier frequency f. c,HMB Historical motion parameters, including historical driving speed v. HMB (x), the direction of movement, and the current positioning information of the terminal, and then obtain the angle α(x) between the direction of movement of the terminal at position x and the radio wave incident on the terminal from the base station. It should be understood that the angle between the direction of movement of the terminal at position x and the radio wave incident on the terminal from the base station obtained from the historical target data is the same as the angle between the direction of movement of the terminal at position x and the radio wave incident on the terminal from the base station obtained from the target data.

[0055] S303. Obtain the target Doppler frequency offset value based on the target data and historical target data;

[0056] In some embodiments, firstly, a first Doppler frequency offset value is obtained from the target data:

[0057]

[0058] Then, the second Doppler frequency offset value is obtained through historical target data;

[0059]

[0060] Finally, the first Doppler frequency offset value and the second Doppler frequency offset value are combined to obtain a target Doppler frequency offset value of the terminal at x:

[0061]

[0062] S304, obtaining a tuning parameter of the radio frequency front end according to the target Doppler frequency offset value;

[0063] In some embodiments, when the radio frequency front end includes a low noise amplifier, the terminal is in a stationary state, the center frequency of the low noise amplifier is f, and the low noise amplifier matching network is a parallel resonance network, and the capacitance value of the matching network is taken as the tuning parameter, then the target Doppler frequency offset value f D (x) is obtained by Doppler , that is, when the center frequency f is the target Doppler frequency offset value f D (x), then:

[0064] That is, Further, the capacitance C

[0065] Further, when the center frequency f is the target Doppler frequency offset value f D (x), the capacitance C Doppler required by the matching network corresponding to the center frequency f is obtained.

[0066] S305, adjusting the radio frequency front end according to the tuning parameter of the radio frequency front end.

[0067] In some embodiments, the radio frequency front end is tuned according to the tuning parameter, for example, by changing the control voltage, so that the variable capacitance in the low noise amplifier parallel resonance network changes from C to C Doppler . Finally, the center frequency of the low noise amplifier parallel resonance network is the target Doppler frequency offset value f D (x), so that the radio frequency front end receiver of the terminal works in an optimal manner and is not affected by the Doppler effect caused by the high-speed movement of the terminal.

[0068] The frequency offset compensation method provided by the embodiment of the application obtains target data, the target data including latitude and longitude coordinates, obtains historical target data according to the latitude and longitude coordinates, obtains a target Doppler frequency offset value according to the target data and the historical target data, obtains a tuning parameter of a radio frequency front end according to the target Doppler frequency offset value, and adjusts the radio frequency front end according to the tuning parameter of the radio frequency front end. When the terminal is in high-speed movement, the target Doppler frequency offset value is calculated according to the target data, and then a value required by the radio frequency front end is obtained according to the target Doppler frequency offset value, so as to achieve the optimization of dynamically adjusting the matching network. The problem that the Doppler frequency offset causes the frequency difference of the signal received by the terminal and finally affects the signal demodulation of the terminal and the rise of the bit error rate is solved.

[0069] Embodiment three:

[0070] The embodiment also provides a frequency offset compensation device, as shown in Figure 4 , which comprises:

[0071] a Doppler frequency offset value obtaining module, configured to obtain target data, and obtain a target Doppler frequency offset value according to the target data, the target data comprising: positioning information, carrier frequency, and motion parameter;

[0072] a tuning parameter obtaining module, configured to obtain a tuning parameter of a radio frequency front end according to the target Doppler frequency offset value;

[0073] a tuning module, configured to tune the radio frequency front end according to the tuning parameter.

[0074] In some embodiments, the tuning parameter obtaining module is further configured to obtain a target capacitance value of a variable capacitance in the radio frequency front end according to the target Doppler frequency offset value;

[0075] the tuning module is further configured to change a voltage according to the target capacitance value, and then adjust the capacitance value of the variable capacitance to the target capacitance value.

[0076] In the embodiment, the various modules in the frequency offset compensation device are combined and matched, the Doppler frequency offset value obtaining module is configured to obtain target data, and obtain a target Doppler frequency offset value according to the target data, the target data comprising: positioning information, carrier frequency, and motion parameter; the tuning parameter obtaining module is configured to obtain a tuning parameter of a radio frequency front end according to the target Doppler frequency offset value; and the tuning module is configured to tune the radio frequency front end according to the tuning parameter, so that when the terminal is in high-speed movement and there is a Doppler frequency offset, the target Doppler frequency offset value is calculated according to the target data, and then the value that needs to be adjusted for the radio frequency front end is obtained according to the target Doppler frequency offset value, so as to achieve the optimization of dynamic adjustment of the matching network; and the problem that the Doppler frequency offset causes the frequency difference of the signal received by the terminal, and finally affects the terminal signal demodulation and the rise of the bit error rate is solved.

[0077] The embodiment also provides a terminal, as shown in Figure 5 , which comprises a processor 501, a memory 502, and a communication bus 503, wherein:

[0078] The communication bus 503 is configured to realize the connection communication between the processor 501 and the memory 502;

[0079] The processor 501 is configured to execute one or more computer programs stored in the memory 502, so as to realize at least one step in the frequency offset compensation method in the above-mentioned embodiment one and embodiment two.

[0080] The embodiments also provide a computer-readable storage medium including a volatile or non-volatile, removable or non-removable medium implemented in any method or technology for storage of information such as computer readable instructions, data structures, computer program modules or other data. The computer-readable storage medium includes, but is not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable read only memory), flash memory or other memory technology, CD-ROM (Compact Disc Read-Only Memory), digital versatile discs (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.

[0081] The computer-readable storage medium in the embodiments can be used to store one or more computer programs, and the stored one or more computer programs can be executed by a processor to implement at least one step of the frequency offset compensation method in Embodiment One and Embodiment Two.

[0082] It can be seen that all or some steps in the disclosed method, the functions of the modules / units in the system and the device can be implemented as software (which can be implemented by computer program codes executable by a computing device), firmware, hardware and appropriate combinations thereof. In the hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component can have multiple functions, or one function or step can be performed by several physical components in cooperation. Some or all of the physical components can be implemented as software executed by a processor such as a central processing unit, a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit such as an application specific integrated circuit.

[0083] In addition, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, computer program modules or other data in modulated data signals such as carrier waves or other transport mechanisms, and can include any information delivery media. Therefore, the present application is not limited to any particular hardware and software combination.

[0084] The above is a further detailed description of the embodiments of the present application in combination with specific embodiments, and cannot be deemed as limitation of the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or replacements can be made, and all of them shall be deemed as falling within the protection scope of the present application.

Claims

1. A frequency offset compensation method, comprising: Acquire current target data, and obtain a first Doppler frequency offset value based on the current target data. The current target data includes: positioning information, current carrier frequency, and current driving speed of the terminal. The first Doppler frequency offset value is calculated based on the current carrier frequency, the current driving speed of the terminal, the propagation speed of electromagnetic waves, and the angle between the terminal's motion direction corresponding to the positioning information and the radio waves incident on the terminal from the base station. Historical target data is obtained based on the positioning information, and a second Doppler frequency offset value is obtained based on the historical target data. The historical target data includes: historical carrier frequency and historical terminal speed. The second Doppler frequency offset value is calculated based on the historical carrier frequency, the historical terminal speed, the propagation speed of electromagnetic waves, and the angle between the terminal's motion direction corresponding to the positioning information and the radio waves incident on the terminal from the base station. Calculate the ratio of the first Doppler frequency offset value to the second Doppler frequency offset value, and adjust the second Doppler frequency offset value according to the ratio to obtain the target Doppler frequency offset value; The tuning parameters of the radio frequency front end are obtained based on the target Doppler frequency offset value; The radio frequency front end is tuned according to the tuning parameters.

2. The frequency offset compensation method as described in claim 1, characterized in that, The step of obtaining the tuning parameters of the RF front end based on the target Doppler frequency offset includes: The target capacitance value of the variable capacitor in the RF front end is obtained based on the target Doppler frequency offset value.

3. The frequency offset compensation method according to claim 2, characterized in that, The step of tuning the RF front-end according to the tuning parameters includes: The voltage is changed according to the target capacitance value, thereby adjusting the capacitance value of the variable capacitor to the target capacitance value.

4. The frequency offset compensation method as described in claim 1, characterized in that, After adjusting the second Doppler frequency offset value according to the ratio to obtain the target Doppler frequency offset value, and before obtaining the tuning parameters of the RF front end based on the target Doppler frequency offset value, the process further includes: The target Doppler frequency offset value is verified based on the first Doppler frequency offset value; If the verification fails, the target Doppler frequency offset value is reacquired.

5. A frequency offset compensation device, comprising: A target Doppler frequency offset value acquisition module is used to acquire current target data, acquire a first Doppler frequency offset value based on the current target data, the current target data including: positioning information, current carrier frequency, and current terminal speed; wherein, the first Doppler frequency offset value is calculated based on the current carrier frequency, the current terminal speed, the propagation speed of electromagnetic waves, and the angle between the terminal's motion direction corresponding to the positioning information and the radio waves incident on the terminal from the base station; acquire historical target data based on the positioning information, acquire a second Doppler frequency offset value based on the historical target data, the historical target data including: historical carrier frequency and historical terminal speed; wherein, the second Doppler frequency offset value is calculated based on the historical carrier frequency, the historical terminal speed, the propagation speed of electromagnetic waves, and the angle between the terminal's motion direction corresponding to the positioning information and the radio waves incident on the terminal from the base station; calculate the ratio of the first Doppler frequency offset value to the second Doppler frequency offset value, adjust the second Doppler frequency offset value according to the ratio, and obtain the target Doppler frequency offset value; The tuning parameter acquisition module is used to acquire the tuning parameters of the radio frequency front end based on the target Doppler frequency offset value; A tuning module is used to tune the radio frequency front end according to the tuning parameters.

6. The frequency offset compensation device as described in claim 5, characterized in that, The tuning parameter acquisition module is also used to acquire the target capacitance value of the variable capacitor in the RF front end based on the target Doppler frequency offset value. The tuning module is also used to change the voltage according to the target capacitance value, thereby adjusting the capacitance value of the variable capacitor to the target capacitance value.

7. A terminal, the terminal comprising a processor, a memory, and a communication bus; The communication bus is used to enable communication between the processor and the memory; The processor is used to execute one or more computer programs stored in the memory to implement the steps of the frequency offset compensation method as described in any one of claims 1 to 4.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores one or more computer programs, which can be executed by one or more processors to implement the steps of the frequency offset compensation method as described in any one of claims 1 to 4.

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