HPLC and HRF-based dual-mode communication module frequency correction system and method

Abstract

The application relates to a frequency calibration system and method of a dual-mode communication module based on HPLC and HRF. The method can obtain the NTB value between the twice sending time of a copy controller and the NTB value between the twice receiving time of the dual-mode communication module to be calibrated by receiving a first frequency offset calibration frame signal and a second frequency offset calibration frame signal, so that the frequency deviation value can be obtained according to the NTB value, and then the PLL decimal part parameter can be adjusted to obtain the accurate adjusted decimal part parameter, and accurate frequency correction can be realized through the PLL circuit. The application embodiment calibrates the dual-mode communication module through the calibrated copy controller, so that additional equipment and human resources are not needed, automatic correction can be realized, the speed is high, the efficiency is high, and accurate frequency calibration of the module can be conveniently realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power carrier communication, in particular to a frequency calibration system and method for a dual-mode communication module based on HPLC and HRF. BACKGROUND

[0002] As a core component of the metering system, the dual-mode communication module based on HPLC and HRF is widely used in concentrators, concentrators and terminal meters, and its performance is directly related to the data acquisition and communication efficiency of the entire power grid. However, under the dual pressure of cost control and performance demand, the dual-mode communication module in the terminal meter often uses a passive crystal oscillator as a frequency reference. The passive crystal oscillator uses the resonant characteristics of the crystal to generate an oscillation signal, but it is easily affected by external circuits and the physical properties of the crystal, resulting in insufficient frequency stability and frequency deviation.

[0003] Frequency deviation will cause the received signal of the terminal meter to shift in time, change the signal waveform, and thus produce distortion. This distortion will prevent the receiving end from accurately restoring the information from the sending end, making it impossible to accurately obtain the transmitted data, thereby affecting communication performance. Currently, the industry generally uses a clock instrument to calibrate the frequency of the dual-mode communication module. The clock instrument uses a periodic physical process (such as the oscillation of a quartz crystal) to measure time, and has high precision and stability. However, the existing clock instrument correction method has many limitations. On the one hand, this method requires manual adjustment of the deviation compensation value in the dual-mode communication, which is not only inefficient, but also susceptible to human factors, making it difficult to ensure the accuracy of the correction results. On the other hand, the clock instrument correction method cannot be batch processed and can only be corrected one by one, which will consume a lot of time and labor costs in large-scale production and cannot meet the rapid needs of the production line. Therefore, how to accurately and quickly calibrate the frequency of the dual-mode communication module is a problem that needs to be solved. SUMMARY

[0004] In view of the above, the present application provides a frequency calibration system and method for a dual-mode communication module based on HPLC and HRF to solve at least one problem in the background art.

[0005] In a first aspect, the present application provides a frequency calibration system for a dual-mode communication module based on HPLC and HRF, which includes a host computer, a copy controller, and a dual-mode communication module to be calibrated. The host computer is connected to the copy controller, and the copy controller is connected to one or more dual-mode communication modules to be calibrated. The copy controller is a calibrated frequency copy controller.

[0006] The host computer is configured to send a frequency calibration instruction to the copy controller.

[0007] The frequency offset calibration frame signal is sent to the double-mode communication module to be calibrated by the controller.

[0008] The double-mode communication module to be calibrated receives the first frequency offset calibration frame signal sent by the controller and performs synchronous demodulation processing to obtain a first received NTB value and a first sent NTB value; wherein the first sent NTB value is the NTB value corresponding to the sending time of the first frequency offset calibration frame signal; the first received NTB value is the NTB value corresponding to the synchronization time of the first frequency offset calibration frame signal; receives the second frequency offset calibration frame signal sent by the controller and performs synchronous demodulation processing to obtain a second received NTB value and a second sent NTB value; wherein the second sent NTB value is the NTB value corresponding to the sending time of the second frequency offset calibration frame signal; the second received NTB value is the NTB value corresponding to the synchronization time of the second frequency offset calibration frame signal; determines a frequency deviation value according to the first received NTB value, the first sent NTB value, the second received NTB value and the second sent NTB value; adjusts the decimal part parameter in the PLL parameter according to the frequency deviation value, wherein the PLL parameter includes an integer part parameter and a decimal part parameter; performs frequency calibration according to the integer part parameter and the adjusted decimal part parameter.

[0009] Optionally, the frequency deviation value is determined according to the first received NTB value, the first sent NTB value, the second received NTB value and the second sent NTB value, specifically:

[0010] F=(△NTB send -△NTB recv )*2 N / △NTB recv

[0011] Wherein, F represents the frequency deviation value; △NTB send represents the count interval between the second sent NTB value and the first sent NTB value; △NTB recv represents the count interval between the second received NTB value and the first received NTB value; N represents the number of bits of the decimal frequency divider in the PLL.

[0012] Optionally, the decimal part parameter in the PLL parameter is adjusted according to the frequency deviation value, specifically:

[0013] F RAC ’=F RAC +F

[0014] Wherein, F RAC ’ represents the adjusted decimal part parameter; F RAC represents the initial value of the decimal part parameter; F represents the frequency deviation value.

[0015] Optionally, frequency is calibrated according to the integer part parameter and the adjusted decimal part parameter, specifically as follows:

[0016] F vco =(F ref / R DIV )* [F DIV +(F RAC ’ / 2 N )]

[0017] Wherein, F vco represents output frequency, F ref represents input frequency, F DIV represents integer part initial value, R DIV represents reference frequency divider initial value.

[0018] Optionally, the controller is connected with a plurality of double-mode communication modules to be calibrated, and is configured to send frequency offset calibration frame signals to the plurality of double-mode communication modules to be calibrated in a broadcast manner.

[0019] In another aspect, the application further provides a frequency calibration method for a double-mode communication module based on HPLC and HRF, which is applied to the frequency calibration system in the above embodiment; the method comprises the following steps:

[0020] Receiving the first frequency offset calibration frame signal sent by the controller and performing synchronous demodulation processing to obtain a first received NTB value and a first sent NTB value; wherein the first sent NTB value is the NTB value corresponding to the time when the first frequency offset calibration frame signal is sent; and the first received NTB value is the NTB value corresponding to the time when the first frequency offset calibration frame signal is synchronized;

[0021] Receiving the second frequency offset calibration frame signal sent by the controller and performing synchronous demodulation processing to obtain a second received NTB value and a second sent NTB value; wherein the second sent NTB value is the NTB value corresponding to the time when the second frequency offset calibration frame signal is sent; and the second received NTB value is the NTB value corresponding to the time when the second frequency offset calibration frame signal is synchronized;

[0022] Determining a frequency deviation value according to the first received NTB value, the first sent NTB value, the second received NTB value and the second sent NTB value;

[0023] Adjusting the decimal part parameter in the PLL parameter according to the frequency deviation value, wherein the PLL parameter comprises an integer part parameter and a decimal part parameter; and frequency is calibrated according to the integer part parameter and the adjusted decimal part parameter.

[0024] Optionally, the frequency deviation value is determined according to the first received NTB value, the first sent NTB value, the second received NTB value and the second sent NTB value, specifically as follows:

[0025] F=(△NTB send -△NTB recv )*2 N / △NTB recv

[0026] Wherein, F represents the frequency deviation value; △NTB send represents the count interval between the second sending NTB value and the first sending NTB value; △NTB recv represents the count interval between the second receiving NTB value and the first receiving NTB value; N represents the number of bits of the fractional divider in the PLL.

[0027] Optionally, the fractional part parameter in the PLL parameter is adjusted according to the frequency deviation value, specifically:

[0028] F RAC ’=F RAC +F

[0029] Wherein, F RAC ’ represents the adjusted fractional part parameter; F RAC represents the initial value of the fractional part parameter; F represents the frequency deviation value.

[0030] Optionally, frequency calibration is performed according to the integer part parameter and the adjusted fractional part parameter, specifically:

[0031] F vco =(F ref / R DIV )* [F DIV +(F RAC ’ / 2 N )]

[0032] Wherein, F vco represents the output frequency, F ref represents the input frequency, F DIV represents the initial value of the integer part, and R DIV represents the initial value of the reference divider.

[0033] Optionally, the frequency controller is connected with a plurality of double-mode communication modules to be calibrated, and is configured to send a frequency offset calibration frame signal to the plurality of double-mode communication modules to be calibrated in a broadcast manner.

[0034] In the embodiment of the present application, the double-mode communication module to be calibrated can obtain the NTB value between the two sending instants of the copier and the NTB value between the two receiving instants of the double-mode communication module to be calibrated by receiving the first frequency offset calibration frame signal and the second frequency offset calibration frame signal, so as to obtain the frequency offset value according to the NTB value, and then adjust the decimal part parameter of the PLL to obtain the accurate adjusted decimal part parameter, so as to realize accurate frequency correction through the PLL circuit. The double-mode communication module is calibrated by the calibrated copier in the embodiment of the present application, so that additional equipment and human resources are not needed, automatic correction can be realized, the speed is fast, the efficiency is high, and accurate frequency correction of the module can be conveniently realized.

[0035] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0037] Figure 1 A frequency correction system of a double-mode communication module based on HPLC and HRF provided by an embodiment of the present application;

[0038] Figure 2 A frequency correction method of a double-mode communication module based on HPLC and HRF provided by an embodiment of the present application;

[0039] Figure 3 A frequency correction method flowchart of a specific embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the technical solutions and beneficial effects of the present application more apparent and easy to understand, the following will be described in detail by means of specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as the technical and scientific terms in the technical field to which the present application belongs.

[0041] Figure 1 A frequency correction system of a double-mode communication module based on HPLC and HRF provided by an embodiment of the present application. As shown in Figure 1As shown, the frequency calibration system of the embodiment of the present application comprises a host computer, a control device and a double-mode communication module to be calibrated. The host computer can be connected to the control device through a serial port or a network port, and is used for data exchange and instruction transmission with the control device, such as sending frequency calibration instructions, configuring working links, frequency bands, node addresses, etc. to the control device. The host computer can be a computer device in various forms, such as a computer used for production line testing, or a portable device used for power grid monitoring or maintenance.

[0042] The control device is connected to one or more double-mode communication modules to be calibrated, and is used for sending frequency offset calibration frame signals to the double-mode communication modules to be calibrated. In a smart grid, the control device is a channel connection device used for production, setting and maintenance, and is used for copying terminal meters in cooperation with the host computer (or other smart terminals). In the embodiment of the present application, the data communication between the host computer and the double-mode communication module is realized through the control device. In the embodiment of the present application, the control device can be connected to the double-mode communication module to be calibrated through a power line, or can be connected to the double-mode communication module to be calibrated through a wireless way; correspondingly, the control device can send frequency offset calibration frame signals through an HPLC way, or can send frequency offset calibration frame signals through an HRF way. Optionally, the control device is connected to multiple double-mode communication modules to be calibrated, and is used for sending frequency offset calibration frame signals to the double-mode communication modules to be calibrated through a broadcast way, so that multiple double-mode communication modules can be calibrated at a time, and the calibration efficiency is improved.

[0043] In the embodiment of the present application, the control device is a frequency-calibrated control device, and its frequency calibration can be realized by using a clock instrument, which is not described herein.

[0044] In the embodiment of the present application, the passive crystal oscillator is used to generate the clock signal in the analog-to-digital conversion module (ADC) of the dual-mode communication module, and the sampling frequency of the ADC of each dual-mode communication module is affected by the external circuit and the physical characteristics of the crystal, resulting in insufficient frequency stability. In the embodiment of the present application, the dual-mode communication module can perform frequency correction through a phase-locked loop (PLL) circuit. The PLL is a circuit used to generate or adjust the clock signal. In the PLL circuit, the integer part parameter and the fractional part parameter are used to achieve fine frequency adjustment. In the embodiment of the present application, the dual-mode module to be calibrated is used to receive the first frequency offset calibration frame signal sent by the copy controller and perform synchronous demodulation processing to obtain a first received NTB value and a first sent NTB value. The first sent NTB value is the NTB value corresponding to the moment of sending the first frequency offset calibration frame signal. The first received NTB value is the NTB value corresponding to the moment of synchronizing the first frequency offset calibration frame signal. The dual-mode module to be calibrated is also used to receive the second frequency offset calibration frame signal sent by the copy controller and perform synchronous demodulation processing to obtain a second received NTB value and a second sent NTB value. The second sent NTB value is the NTB value corresponding to the moment of sending the second frequency offset calibration frame signal. The second received NTB value is the NTB value corresponding to the moment of synchronizing the second frequency offset calibration frame signal. The frequency deviation value is determined according to the first received NTB value, the first sent NTB value, the second received NTB value, and the second sent NTB value. The fractional part parameter in the PLL parameter is adjusted according to the frequency deviation value. The frequency is corrected according to the integer part parameter and the adjusted fractional part parameter. It should be noted that the NTB value is a counting value based on the clock signal. For example, if the frequency is 25Mhz, the counting is performed once every 40ns. Since the digital-to-analog conversion (DAC) sampling frequency of the copy controller is inconsistent with the analog-to-digital conversion (ADC) sampling frequency of the dual-mode communication module to be calibrated, the counting values between the two sending moments and the two receiving moments are inconsistent, and thus the frequency deviation between the copy controller and the dual-mode communication module to be calibrated can be obtained.

[0045] In the embodiment of the present application, the dual-mode communication module to be calibrated receives the first frequency offset calibration frame signal and the second frequency offset calibration frame signal, thereby obtaining the NTB values between the two sending moments of the sending end (copy controller) and the NTB values between the two receiving moments of the receiving end (dual-mode communication module to be calibrated). The NTB values between the two sending moments and the NTB values between the two receiving moments reflect the difference in frequency between the copy controller and the dual-mode communication module to be calibrated, and thus the frequency deviation value can be obtained according to the NTB values. Then, the PLL fractional part parameter can be adjusted to obtain accurate adjusted fractional part parameter, thereby realizing accurate frequency correction. In the embodiment of the present application, the dual-mode communication module is calibrated by the calibrated copy controller, and the original copy controller production and testing environment can be used, thereby not needing to additionally increase equipment and human resources, realizing automatic correction, being fast and efficient, and being convenient for accurate frequency correction of the module.

[0046] Wherein, the frequency deviation value is determined according to the first receiving NTB value, the first sending NTB value, the second receiving NTB value and the second sending NTB value, and specifically is:

[0047] F=(△NTB send -△NTB recv )*2 N / △NTB recv

[0048] Wherein, F represents the frequency deviation value; △NTB send represents the count interval between the second sending NTB value and the first sending NTB value, that is, △NTB send =NTB send2 -NTB send1 , NTB send2 represents the second sending NTB value, and NTB send1 represents the first sending NTB value; △NTB recv represents the count interval between the second receiving NTB value and the first receiving NTB value, that is, △NTB recv =NTB recv2 -NTB recv1 , NTB recv2 represents the second receiving NTB value, and NTB recv1 represents the first receiving NTB value; N represents the number of bits of the fractional divider in the PLL. It should be noted that the frequency deviation value represents the relative difference between the receiving end and the sending end frequency, and by multiplying by 2 N , the relative difference can be converted into an integer (which needs to be divided by 2 N again to become a fraction in subsequent correction, so as to facilitate the register storage in the PLL circuit).

[0049] The fractional part parameter in the PLL parameter is adjusted according to the frequency deviation value, and specifically is:

[0050] F RAC ’=F RAC +F

[0051] Wherein, F RAC ’ represents the adjusted fractional part parameter; F RAC represents the initial value of the fractional part parameter; F represents the frequency deviation value. It should be noted that F RAC is a preset value, which is set according to the PLL circuit and the theoretical frequency.

[0052] The frequency is corrected according to the integer part parameter and the adjusted fractional part parameter, and specifically is:

[0053] F vco =(F ref / R DIV )* [FDIV +(F RAC ’ / 2 N )]

[0054] wherein, F vco represents an output frequency, F ref represents an input frequency, F DIV represents an integer part initial value, R DIV represents a reference frequency divider initial value. F DIV and R DIV are preset values, which are set according to a PLL circuit and a theoretical frequency. In the embodiment of the application, R DIV is set to 1.

[0055] Figure 2 Fig. 1 shows a frequency calibration method flowchart of a dual-mode communication module based on HPLC and HRF provided by an embodiment of the application. The method is applied to the frequency calibration system of the above-mentioned embodiment. As shown in Fig. 2, the method comprises the following steps. Figure 2

[0056] S1, receiving a first frequency offset calibration frame signal sent by a copy controller and performing synchronous demodulation processing to obtain a first received NTB value and a first sent NTB value.

[0057] wherein, the first sent NTB value is an NTB value corresponding to a first frequency offset calibration frame signal sending moment; and the first received NTB value is an NTB value corresponding to a first frequency offset calibration frame signal synchronization moment;

[0058] S2, receiving a second frequency offset calibration frame signal sent by the copy controller and performing synchronous demodulation processing to obtain a second received NTB value and a second sent NTB value.

[0059] wherein, the second sent NTB value is an NTB value corresponding to a second frequency offset calibration frame signal sending moment; and the second received NTB value is an NTB value corresponding to a second frequency offset calibration frame signal synchronization moment.

[0060] S3, determining a frequency deviation value according to the first received NTB value, the first sent NTB value, the second received NTB value and the second sent NTB value.

[0061] Specifically, the frequency deviation value is calculated according to the following formula:

[0062] F=(△NTB send -△NTB recv )*2 N / △NTB recv

[0063] wherein, F represents the frequency deviation value; △NTB send represents a count interval between the second sent NTB value and the first sent NTB value; and △NTB​recv Indicates the counting interval between the second received NTB value and the first received NTB value; N indicates the number of bits of the fractional divider in the PLL. It should be noted that the frequency deviation value indicates the relative difference between the receiving end and the transmitting end frequency, which is obtained by multiplying by 2 N , so that the relative difference can be converted into an integer (subsequent correction needs to be divided by 2 N Converted into a decimal, which is convenient for storage in the register of the PLL circuit).

[0064] S4. Adjust the decimal part parameters of the PLL parameters according to the frequency deviation value.

[0065] The PLL parameters include integer and fractional parameters. Specifically, the fractional parameters in the PLL parameters are adjusted using the following formula:

[0066] F RAC '=F RAC +F

[0067] Among them, F RAC ' represents the adjusted decimal part parameter; F RAC Indicates the initial value of the decimal part parameter; F indicates the frequency deviation value.

[0068] S5. Perform frequency calibration based on the integer part parameter and the adjusted decimal part parameter.

[0069] Specifically:

[0070] F vco =(F ref / R DIV )* [F DIV +(F RAC ' / 2 N )]

[0071] Among them, F vco Indicates the output frequency, F ref Indicates the input frequency, F DIV Indicates the initial value of the integer part, R DIV Indicates the initial value of the reference divider.

[0072] Figure 3 This is a flow chart of a frequency calibration method according to a specific embodiment of the present application. Figure 3 The frequency calibration method of the embodiment of the present application is introduced. Figure 3As shown, the host computer sets serial port parameters, opens the serial port and configures the work link, frequency band and the like of the copy controller, sets the master-slave nodes, connects the address of the module to be calibrated (STA) and the like; the host computer sends the calibration node frequency offset instruction to the copy controller at intervals of 1-2.5 s, and the copy controller sends the frequency offset calibration frame 1 and the frequency offset calibration frame 2 to the STA after receiving; the STA calculates and sets the frequency offset calibration value according to the two calibration frames after receiving, and then adjusts the parameters according to the frequency offset calibration value for calibration.

[0073] It should be understood that the above embodiments are all exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes can also be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, any combination of the technical features of the above embodiments can also be made to form additional embodiments of the present application which can not have been explicitly described. Therefore, the above embodiments only express several implementation manners of the present application and do not limit the protection scope of the present application.

Claims

1. A dual mode communication module frequency calibration system based on HPLC and HRF, characterized in that, The frequency correction system comprises a host computer, a copy controller and a double-mode communication module to be corrected; the host computer is connected with the copy controller; the copy controller is connected with one or more double-mode communication modules to be corrected; the copy controller is a frequency-corrected copy controller; The host computer is used to send a frequency correction instruction to the copy controller; The copy controller is used to send a frequency offset correction frame signal to the double-mode communication module to be corrected; The double-mode communication module to be corrected is used to receive a first frequency offset correction frame signal sent by the copy controller and perform synchronous demodulation processing to obtain a first received NTB value and a first sent NTB value; wherein the first sent NTB value is an NTB value corresponding to a sending time of the first frequency offset correction frame signal; the first received NTB value is an NTB value corresponding to a synchronous time of the first frequency offset correction frame signal; a second frequency offset correction frame signal sent by the copy controller is received and synchronous demodulation processing is performed to obtain a second received NTB value and a second sent NTB value; wherein the second sent NTB value is an NTB value corresponding to a sending time of the second frequency offset correction frame signal; the second received NTB value is an NTB value corresponding to a synchronous time of the second frequency offset correction frame signal; a frequency deviation value is determined according to the first received NTB value, the first sent NTB value, the second received NTB value and the second sent NTB value; a decimal part parameter in a PLL parameter is adjusted according to the frequency deviation value, wherein the PLL parameter comprises an integer part parameter and the decimal part parameter; frequency correction is performed according to the integer part parameter and the adjusted decimal part parameter.

2. The HPLC and HRF based dual mode communication module frequency correction system as claimed in claim 1, wherein, The frequency deviation value is determined according to the first received NTB value, the first sent NTB value, the second received NTB value and the second sent NTB value, specifically as follows: F = (ΔNTB send - ΔNTB recv )* 2 N / ΔNTB recv where F represents a frequency deviation value; ΔNTB send represents the count interval between the second transmitted NTB value and the first transmitted NTB value; ΔNTB recv represents the count interval between the second received NTB value and the first received NTB value; N represents the number of bits of the fractional divider in the PLL.

3. The HPLC and HRF based dual mode communication module frequency correction system as claimed in claim 2, wherein, The decimal part parameter in the PLL parameter is adjusted according to the frequency deviation value, specifically as follows: F RAC ’=F RAC +F where F RAC represents the adjusted decimal portion parameter; F RAC represents the initial value of the decimal portion parameter; F represents the frequency deviation value.

4. The HPLC and HRF based dual mode communication module frequency correction system as claimed in claim 3, wherein, The frequency correction is performed according to the integer part parameter and the adjusted decimal part parameter, specifically as follows: F vco = (F ref / R DIV )* [F DIV + (F RAC ’ / 2 N )] where F vco represents the output frequency, F ref represents the input frequency, F DIV represents the integer part initial value, R DIV represents the reference divider initial value.

5. The HPLC and HRF based dual mode communication module frequency correction system as claimed in claim 1, wherein, The copy controller is connected with a plurality of double-mode communication modules to be corrected and is used to send a frequency offset correction frame signal to the plurality of double-mode communication modules to be corrected in a broadcast mode.

6. A method of frequency calibration of a dual-mode communication module based on HPLC and HRF, characterized in that, The method is applied to a frequency correction system, the frequency correction system comprises a host computer, a copy controller and a double-mode communication module to be corrected; the host computer is connected with the copy controller and is used to send a frequency correction instruction to the copy controller; the copy controller is connected with one or more double-mode communication modules to be corrected and is used to send a frequency offset correction frame signal to the double-mode communication module to be corrected; the copy controller is a frequency-corrected copy controller; the method comprises the following steps: A first frequency offset correction frame signal sent by the copy controller is received and synchronous demodulation processing is performed to obtain a first received NTB value and a first sent NTB value; wherein the first sent NTB value is an NTB value corresponding to a sending time of the first frequency offset correction frame signal; the first received NTB value is an NTB value corresponding to a synchronous time of the first frequency offset correction frame signal; A second frequency offset correction frame signal sent by the copy controller is received and synchronous demodulation processing is performed to obtain a second received NTB value and a second sent NTB value; wherein the second sent NTB value is an NTB value corresponding to a sending time of the second frequency offset correction frame signal; the second received NTB value is an NTB value corresponding to a synchronous time of the second frequency offset correction frame signal; a frequency deviation value is determined according to the first received NTB value, the first sent NTB value, the second received NTB value and the second sent NTB value; a decimal part parameter in a PLL parameter is adjusted according to the frequency deviation value, wherein the PLL parameter comprises an integer part parameter and the decimal part parameter; frequency correction is performed according to the integer part parameter and the adjusted decimal part parameter. receive the second frequency offset calibration frame signal sent by the copier and perform synchronous demodulation processing to obtain a second received NTB value and a second sent NTB value; wherein the second sent NTB value is an NTB value corresponding to a second frequency offset calibration frame signal sending moment; the second received NTB value is an NTB value corresponding to a second frequency offset calibration frame signal synchronization moment; determine a frequency deviation value according to the first received NTB value, the first sent NTB value, the second received NTB value, and the second sent NTB value; adjust a decimal part parameter in a PLL parameter according to the frequency deviation value, wherein the PLL parameter comprises an integer part parameter and a decimal part parameter; and perform frequency calibration according to the integer part parameter and the adjusted decimal part parameter.

7. The HPLC and HRF based dual mode communication module frequency correction method as claimed in claim 6, wherein, determine a frequency deviation value according to the first received NTB value, the first sent NTB value, the second received NTB value, and the second sent NTB value, specifically as follows: F = (ΔNTB send - ΔNTB recv )* 2 N / ΔNTB recv where F represents a frequency deviation value; ΔNTB send represents the count interval between the second transmitted NTB value and the first transmitted NTB value; ΔNTB recv represents the count interval between the second received NTB value and the first received NTB value; N represents the number of bits of the fractional divider in the PLL.

8. The HPLC and HRF based dual mode communication module frequency correction method as claimed in claim 7, wherein, adjust a decimal part parameter in a PLL parameter according to the frequency deviation value, specifically as follows: F RAC ’=F RAC +F where F RAC represents the adjusted decimal portion parameter; F RAC represents the initial value of the decimal portion parameter; F represents the frequency deviation value.

9. The HPLC and HRF based dual mode communication module frequency correction method as claimed in claim 8, wherein, perform frequency calibration according to the integer part parameter and the adjusted decimal part parameter, specifically as follows: F vco = (F ref / R DIV )* [F DIV + (F RAC ’ / 2 N )] where F vco represents the output frequency, F ref represents the input frequency, F DIV represents the integer part initial value, R DIV represents the reference divider initial value.

10. The HPLC and HRF based dual mode communication module frequency correction method as claimed in claim 6, wherein, The copier is connected with a plurality of double-mode communication modules to be calibrated, and is configured to send a frequency offset calibration frame signal to the plurality of double-mode communication modules to be calibrated in a broadcast manner.

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