Time-frequency synchronization system and method based on hplc and hrf dual-mode communication

Abstract

The application relates to the field of communication technology, in particular to a time-frequency synchronization system and method based on HPLC and HRF dual-mode communication, which comprises a multipath detection module, a synchronization compensation module, a dual-mode fusion module, a synchronization control module and a monitoring feedback module; the multipath detection module is used for identifying and quantifying synchronization errors caused by multipath effects; the synchronization compensation module is used for outputting compensated synchronization signals; the dual-mode fusion module is used for outputting fused synchronization signals; the synchronization control module is used for receiving the compensated synchronization signals and the fused synchronization signals, coordinating time-frequency synchronization states of the HPLC communication module and the HRF communication module, and outputting control instructions. Through accurate analysis of multipath effects and real-time synchronization compensation and signal fusion, the application effectively improves time-frequency synchronization precision, stability and transmission efficiency of the dual-mode communication system, and solves the problem of synchronization errors caused by multipath effects.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a time-frequency synchronization system and method based on HPLC and HRF dual-mode communication. BACKGROUND

[0002] With the continuous development of communication technology, especially in high-frequency communication and dual-mode communication systems, time-frequency synchronization has become an important link to ensure signal transmission quality and system stability. The combination of high-frequency communication systems (such as HPLC communication modules) and wireless communication systems (such as HRF communication modules) has been widely used in various complex communication scenarios, such as Internet of Vehicles, Internet of Things, and intelligent manufacturing, etc. Due to the different transmission characteristics and multipath effects of HPLC and HRF systems in the signal transmission process, the time-frequency synchronization problem of them is increasingly prominent. Multipath effects can cause signal time delay, amplitude attenuation, and phase shift, thereby making synchronization accuracy and system stability face great challenges.

[0003] However, most of the existing time-frequency synchronization technologies rely on a single signal source or simple synchronization methods, which cannot effectively solve the time-frequency synchronization problem in dual-mode communication systems. Traditional time-frequency synchronization methods often ignore the influence of multipath effects, leading to synchronization error accumulation and low transmission efficiency. In addition, the synchronization compensation algorithms in the existing technology mostly focus on single-dimensional adjustment, which is difficult to meet the multiple requirements of time-frequency synchronization, and lack the ability of dynamic adjustment to real-time feedback. Therefore, how to overcome the influence of multipath effects on synchronization accuracy in complex dual-mode communication environment and realize efficient and accurate time-frequency synchronization is still a technical problem to be solved. SUMMARY

[0004] Based on the above purpose, the present application provides a time-frequency synchronization system and method based on HPLC and HRF dual-mode communication.

[0005] The time-frequency synchronization system based on HPLC and HRF dual-mode communication includes a multipath detection module, a synchronization compensation module, a dual-mode fusion module, a synchronization control module, and a monitoring feedback module.

[0006] The multipath detection module is used to receive the synchronization signals of the HPLC communication module and the HRF communication module, and through analyzing the time difference of signal arrival, amplitude attenuation, and phase change, it identifies and quantifies the synchronization error caused by multipath effects, and outputs the multipath error information.

[0007] The synchronization compensation module is used to receive the multipath error information output by the multipath detection module, and adjust the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module according to the multipath error information, and output the compensated synchronization signal.

[0008] Dual-mode fusion module: used for receiving synchronization signals from the HPLC communication module and the HRF communication module, and adjusting the weights of the two signals for fusion based on the multipath error information provided by the multipath detection module, and outputting the fused synchronization signal;

[0009] Synchronization control module: connected to the synchronization compensation module and the dual-mode fusion module, used for receiving the compensated synchronization signal and the fused synchronization signal, to coordinate the time-frequency synchronization state of the HPLC communication module and the HRF communication module, and outputting a control instruction;

[0010] Monitoring feedback module: used for continuously monitoring the running state and synchronization effect of the system, and collecting real-time feedback data for the multipath detection module and the synchronization compensation module to optimize and adjust.

[0011] Optionally, the multipath detection module includes a synchronization signal receiving unit, a signal analysis unit, and an error information generation unit; wherein:

[0012] Synchronization signal receiving unit: used for receiving synchronization signals from the HPLC communication module and the HRF communication module simultaneously, the synchronization signal receiving unit is configured with a clock synchronization interface and a signal receiving interface; wherein the clock synchronization interface realizes clock synchronization of the HPLC synchronization signal and the HRF synchronization signal through a phase-locked loop circuit, to ensure that the time references of the received signals are consistent; the signal receiving interface is used to connect the HPLC communication module and the HRF communication module, to receive and convert the synchronization signals from the two communication modules;

[0013] Signal analysis unit: used for analyzing the HPLC synchronization signal and the HRF synchronization signal received by the synchronization signal receiving unit;

[0014] The signal analysis unit specifically includes:

[0015] Arrival time difference analysis subunit: used for measuring the arrival time difference between the HPLC synchronization signal and the HRF synchronization signal, and recording relevant data;

[0016] Amplitude attenuation analysis subunit: used for evaluating the amplitude attenuation of the synchronization signal caused by the multipath effect during propagation, and generating attenuation parameters;

[0017] Phase change analysis subunit: used for detecting the phase change of the synchronization signal caused by the multipath propagation, and generating phase offset data;

[0018] Error information generation unit: based on the arrival time difference, amplitude attenuation, and phase change data provided by the signal analysis unit, calculates the synchronization error caused by the multipath effect, and outputs the multipath error information to the synchronization compensation module and the dual-mode fusion module.

[0019] Optionally, the amplitude attenuation analysis subunit specifically comprises:

[0020] Measuring signal strength: measuring the signal strength of the received HPLC synchronization signal and HRF synchronization signal;

[0021] Obtaining standard signal strength: obtaining the standard signal strength before transmission;

[0022] Calculating attenuation factor: calculating the attenuation factor of the HPLC synchronization signal and HRF synchronization signal according to the following formula: Wherein, P received represents the signal strength of the received HPLC synchronization signal and HRF synchronization signal, P transmitted represents the corresponding standard signal strength before transmission P HPLC,0 and P HRF,0 , and a is the attenuation factor of the corresponding synchronization signal.

[0023] Attenuation parameter generation: according to the following multi-path attenuation model formula, combining the attenuation factor and the signal propagation distance, calculating and generating the amplitude attenuation parameter A, the formula is: A = A0 + a·log 10 (d), wherein A is the attenuated signal amplitude, A0 is the reference signal amplitude, a is the calculated attenuation factor, and d is the signal propagation distance.

[0024] Optionally, the phase change analysis subunit comprises:

[0025] Synchronization signal preprocessing: filtering and denoising the received HPLC synchronization signal and HRF synchronization signal to provide a clean data source for subsequent phase analysis;

[0026] Calculating phase: calculating the phase value of the signal according to the received synchronization signal, and calculating the phase change through the following formula: Wherein, is the phase change amount, is the phase of the received synchronization signal, is the phase of the reference signal.

[0027] Phase change detection: based on the calculated phase change amount judging the phase offset caused by the multi-path propagation of the synchronization signal and converting it into phase offset data; specifically, the phase drift is detected through the following phase drift detection algorithm, the formula is: Wherein, is the phase drift amount, is the phase change amount at the nth time point, and N is the number of sample points in the time window.

[0028] Generating phase offset data: converting the phase drift amount as phase offset data.

[0029] Optionally, the error information generating unit includes:

[0030] Arrival time difference data integration subunit: used to receive the arrival time difference data provided by the signal analysis unit and calculate the time synchronization error Δt caused by the multipath effect according to the following formula error , the formula is: Δt error =Δt HRF -Δt HPLC , where Δt HRF is the arrival time difference of the HRF communication signal, Δt HPLC is the arrival time difference of the HPLC communication signal, Δt error is the time synchronization error caused by multipath effect;

[0031] Amplitude attenuation data integration subunit: used to receive the amplitude attenuation data provided by the signal analysis subunit. Assume that the amplitude attenuation of the HRF signal is A. HRF The amplitude attenuation of the HPLC signal is A HPLC , and calculate the amplitude attenuation error A caused by the multipath effect error ;

[0032] Phase change data integration subunit: used to receive the phase change data provided by the signal analysis subunit. Assume that the phase change of the HRF signal is The phase change of the HPLC signal is And calculate the phase synchronization error

[0033] The comprehensive error generation subunit is used to convert the time synchronization error Δt error , Amplitude attenuation error A error and phase synchronization error Combined, multipath synchronization error information is generated through the following weighted average algorithm: Among them, E total is the multipath error, w t 、w A and is the weighting coefficient of time synchronization error, amplitude attenuation error and phase synchronization error, and satisfies

[0034] Optionally, the synchronization compensation module includes a parameter adjustment unit, a synchronization signal generation unit, and a control interface unit, wherein:

[0035] Parameter adjustment unit: used to receive the multipath error information E output by the error information generation unit totaland the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module are adjusted based on a synchronization parameter adjustment algorithm, and a formula is as follows: wherein θ adjust is an adjustment amount of the synchronization parameter, t is a time variable, dt is a time increment, K p , K i , and K d are a proportional coefficient, an integral coefficient, and a differential coefficient respectively;

[0036] The synchronization signal generation unit is configured to generate a compensated synchronization signal according to the adjustment amount Δθ output by the parameter adjustment unit, and the correction of the synchronization signal is implemented through the following time-frequency adjustment formula: wherein S original is an original synchronization signal, is a phase adjustment factor;

[0037] The control interface unit is configured to transmit the compensated synchronization signal S compensated output by the synchronization signal generation unit to the synchronization control module.

[0038] Optionally, the dual-mode fusion module comprises a weight adjustment unit, a signal fusion unit, and an output interface unit, wherein:

[0039] The weight adjustment unit is configured to receive the multipath error information E total output by the error information generation unit, and calculate the weight coefficients of the HPLC synchronization signal and the HRF synchronization signal based on the following weight adjustment algorithm: w HRF = 1-w HPLC wherein w HPLC is the weight coefficient of the HPLC synchronization signal, w HRF is the weight coefficient of the HRF synchronization signal, k is a weight adjustment factor, and E total is the total error information caused by the multipath effect;

[0040] The signal fusion unit is configured to receive the synchronization signal S HPLC from the HPLC communication module and the synchronization signal S HRF from the HRF communication module, and generate a fused synchronization signal S fused based on the weight coefficients w HPLC and w HRF provided by the weight adjustment unit through the following signal fusion formula: S fused = w HPLC ·S HPLC +w HRF ·S HRF wherein S fused is the fused synchronization signal, S HPLCis the HPLC synchronization signal, S HRF is the HRF synchronization signal, w HPLC and w HRF is the weight coefficient of each synchronization signal;

[0041] Output interface unit: used to output the fused synchronization signal S generated by the signal fusion unit fused Output to the synchronization control module.

[0042] Optionally, the synchronization control module includes a signal comparison unit, a control instruction generation unit, and a communication interface unit, wherein:

[0043] Signal comparison unit: used to receive the compensated synchronization signal output by the synchronization compensation module and the fused synchronization signal output by the dual-mode fusion module, and calculate the synchronization state difference ΔS between the two;

[0044] Control instruction generation unit: Based on the synchronization state difference ΔS calculated by the signal comparison unit, the corresponding control instruction is generated through the following control algorithm, the formula is: Among them, C is the control instruction; K p is the proportional coefficient; K i is the integral coefficient; K d is the differential coefficient; ΔS is the synchronization state difference; t is the time variable; ∫ΔSdt is the integral of the synchronization state difference; is the differential of the synchronization state difference;

[0045] Communication interface unit: used to transmit the control instruction C output by the control instruction generation unit to the HPLC communication module and the HRF communication module to achieve dynamic adjustment of time-frequency synchronization parameters.

[0046] Optionally, the monitoring feedback module includes a monitoring unit, a data collection unit, and a data transmission unit; wherein:

[0047] Monitoring unit: used to continuously monitor the system's operating status and time-frequency synchronization effect;

[0048] The monitoring unit specifically includes:

[0049] Operation status monitoring subunit: used to monitor the operation status data of each module of the system in real time, including signal strength and signal quality, and record relevant data;

[0050] Synchronization effect evaluation subunit: used to evaluate the time-frequency synchronization effect of the system. It calculates the synchronization quality index based on the multipath synchronization error information provided by the error information generation unit. The formula is: Among them, Q sync is the synchronization quality index, E total is the multipath error information;

[0051] Data collection unit: used to collect the operating status data and synchronization quality indicators provided by the monitoring unit and organize them into real-time feedback data;

[0052] Data transmission unit: used to transmit real-time feedback data to the multipath detection module and the synchronous compensation module for optimization and adjustment.

[0053] The time-frequency synchronization method based on HPLC and HRF dual-mode communication is implemented by the above-mentioned time-frequency synchronization system based on HPLC and HRF dual-mode communication, and includes the following steps:

[0054] S1: Receive synchronization signals from the HPLC communication module and the HRF communication module simultaneously;

[0055] S2: Analyze the HPLC synchronization signal and HRF synchronization signal received in S1 and calculate their arrival time difference, amplitude attenuation and phase change;

[0056] S3: Generate multipath synchronization error information based on the arrival time difference, amplitude attenuation and phase change calculated in step S2;

[0057] S4: adjusting the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module according to the multipath synchronization error information generated in S3, and generating a compensated synchronization signal;

[0058] S5: Based on the multipath synchronization error information generated in S3, the weight coefficients of the HPLC synchronization signal and the HRF synchronization signal are adjusted, and a fused synchronization signal is generated;

[0059] S6: Based on the compensated synchronization signal and the fused synchronization signal generated in S4 and S5, the synchronization state difference is calculated, and a control instruction is generated to adjust the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module;

[0060] S7: Continuously monitor the system's operating status and time-frequency synchronization effects, collect real-time feedback data, and transmit it to the multipath detection module and synchronization compensation module for optimization and adjustment.

[0061] Beneficial effects of the present invention:

[0062] The present invention solves the synchronization error problem caused by multipath effects in dual-mode communication systems by comprehensively adopting multipath effect detection and synchronization compensation technology. Specifically, by accurately analyzing the arrival time difference, amplitude attenuation and phase change of communication signals, the impact of multipath effects on synchronization accuracy can be identified and quantified in real time, thereby effectively reducing the accumulation of synchronization errors.

[0063] The application improves the reliability and stability of time-frequency synchronization by comprehensive analysis of HPLC and HRF communication signals, dynamic adjustment of synchronization parameters and optimization of the fusion process of synchronization signals, solves the limitation that the prior art cannot effectively deal with multipath effect, and improves the transmission efficiency and anti-interference capability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only a part of the application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0065] Figure 1 A schematic diagram of a time-frequency synchronization system of dual-mode communication of an embodiment of the application;

[0066] Figure 2 A schematic diagram of a time-frequency synchronization method of dual-mode communication of an embodiment of the application. DETAILED DESCRIPTION

[0067] The application will be described in detail below with reference to the drawings and specific embodiments. It should be noted that, in order to make the embodiments more detailed, the following embodiments are the best, preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the application.

[0068] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include a specific feature, structure or property, but not necessarily every embodiment includes the specific feature, structure or property. In addition, when a specific feature, structure or property is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize such a feature, structure or property in combination with other embodiments (whether or not explicitly described).

[0069] Generally, the terms can be understood at least in part from the use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics that are combinable into one or more instances. In addition, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but can instead, depending at least in part on the context, allow for the existence of other factors that are not necessarily explicitly described.

[0070] As Figure 1As shown, the time-frequency synchronization system and method based on HPLC and HRF dual-mode communication includes a multi-path detection module, a synchronization compensation module, a dual-mode fusion module, a synchronization control module, and a monitoring feedback module.

[0071] The multi-path detection module is configured to receive synchronization signals from the HPLC communication module and the HRF communication module, and identify and quantify synchronization errors caused by multi-path effects by analyzing time differences, amplitude attenuation, and phase changes of the signals, and output multi-path error information.

[0072] The synchronization compensation module is configured to receive the multi-path error information output by the multi-path detection module, and adjust time-frequency synchronization parameters of the HPLC communication module and the HRF communication module according to the multi-path error information, and output compensated synchronization signals.

[0073] The dual-mode fusion module is configured to receive synchronization signals from the HPLC communication module and the HRF communication module, and adjust weights of the two signals for fusion based on the multi-path error information provided by the multi-path detection module, and output fused synchronization signals.

[0074] The synchronization control module is connected to the synchronization compensation module and the dual-mode fusion module, and is configured to receive compensated synchronization signals and fused synchronization signals to coordinate time-frequency synchronization states of the HPLC communication module and the HRF communication module, and output control instructions.

[0075] The monitoring feedback module is configured to continuously monitor running states and synchronization effects of the system, and collect real-time feedback data for the multi-path detection module and the synchronization compensation module to perform optimization adjustment.

[0076] The multi-path detection module includes a synchronization signal receiving unit, a signal analysis unit, and an error information generation unit; wherein:

[0077] The synchronization signal receiving unit is configured to simultaneously receive synchronization signals from the HPLC communication module and the HRF communication module, and is provided with a clock synchronization interface and a signal receiving interface; wherein the clock synchronization interface realizes clock synchronization of the HPLC synchronization signal and the HRF synchronization signal through a phase-locked loop (PLL) circuit, to ensure that time references of the received signals are consistent; and the signal receiving interface is configured to connect the HPLC communication module and the HRF communication module, to receive and convert the synchronization signals from the two communication modules to a digital signal processing unit.

[0078] The signal analysis unit is configured to analyze the HPLC synchronization signal and the HRF synchronization signal received by the synchronization signal receiving unit.

[0079] The signal analysis unit specifically includes:

[0080] Arrival time difference analysis subunit: used to measure the arrival time difference between the HPLC synchronization signal and the HRF synchronization signal, and record the relevant data;

[0081] Amplitude attenuation analysis subunit: used to evaluate the amplitude attenuation of the synchronization signal caused by the multipath effect during the propagation process and generate attenuation parameters;

[0082] Phase change analysis subunit: used to detect the phase change caused by the synchronization signal during multipath propagation and generate phase offset data;

[0083] Error information generation unit: Based on the arrival time difference, amplitude attenuation and phase change data provided by the signal analysis unit, the synchronization error caused by the multipath effect is calculated, and the multipath error information is output to the synchronization compensation module and the dual-mode fusion module; through the composition of the above units, by introducing the phase-locked loop (PLL) circuit as the clock synchronization interface, the clock synchronization of the synchronization signals from the HPLC and HRF communication modules is realized, ensuring the consistency of the synchronization signals of the two communication modes in the time reference; each analysis sub-unit in the signal analysis unit adopts digital signal processing technology to measure the arrival time difference, amplitude attenuation and phase change of the synchronization signal respectively, and generate corresponding error information; the error information generation unit calculates the synchronization error based on these data, and outputs it to the synchronization compensation module and the dual-mode fusion module to support subsequent synchronization parameter adjustment and signal fusion.

[0084] The amplitude attenuation analysis subunit specifically includes:

[0085] Measure signal strength: Measure the signal strength of the received HPLC synchronization signal and HRF synchronization signal, and record them as P HPLC and P HRF ;

[0086] Get standard signal strength: Get the standard signal strength before transmission and record it as P HPLC,0 and P HRF,0 ;

[0087] Calculate the attenuation factor: Calculate the attenuation factor α of the HPLC synchronization signal and the HRF synchronization signal according to the following formula HPLC and α HRF , the formula is: Among them, P received represents the signal intensity of the received HPLC synchronization signal and HRF synchronization signal, P transmitted Represents the corresponding standard signal strength P before transmission HPLC,0 and P HRF,0 , α is the attenuation factor of the corresponding synchronization signal;

[0088] Attenuation parameter generation: according to the following multi-path attenuation model formula, combined with the attenuation factor and signal propagation distance, the amplitude attenuation parameter A is calculated and generated, the formula is: A = A0 + a·log 10 (d), wherein A is the amplitude of the attenuated signal, A0 is the reference signal amplitude, a is the calculated attenuation factor, and d is the signal propagation distance.

[0089] The phase change analysis subunit includes:

[0090] Synchronization signal preprocessing: filtering and denoising the received HPLC synchronization signal and HRF synchronization signal to ensure the clarity and accuracy of the signal, and providing a clean data source for subsequent phase analysis;

[0091] Calculate the phase: according to the received synchronization signal, calculate the phase value of the signal, and calculate the phase change through the following formula: Wherein, is the phase change amount, is the phase of the received synchronization signal, is the phase of the reference signal; the reference signal is usually the theoretical phase of the synchronization signal under ideal conditions;

[0092] Phase change detection: based on the calculated phase change amount judges the phase shift caused by the synchronization signal in the multi-path propagation process and converts it into phase shift data; the phase shift is detected through the following phase shift detection algorithm, the formula is: Wherein, is the phase shift amount, is the phase change amount at the nth time point, and N is the number of sample points in the time window;

[0093] Generate phase shift data: take the phase shift amount as the phase shift data and output to the error information generation unit; through the above steps, the phase change of the synchronization signal in the multi-path propagation process can be effectively detected and quantified, especially the phase shift caused by reflection, refraction and other multi-path effects. This method can provide accurate synchronization error information for the system through accurate phase change calculation and drift detection, thereby optimizing the time-frequency synchronization process.

[0094] The error information generation unit includes:

[0095] Arrival time difference data integration subunit: for receiving the arrival time difference data provided by the signal analysis unit, and calculating the time synchronization error Δt caused by the multi-path effect according to the following formula error , the formula is: Δt error = Δt HRF - Δt HPLC , wherein ΔtHRF is the time difference of arrival of HRF communication signals, Δt HPLC is the time difference of arrival of HPLC communication signals, Δt error is the time synchronization error caused by multipath effect;

[0096] amplitude attenuation data integration subunit: for receiving the amplitude attenuation data provided by the signal analysis subunit, let the amplitude attenuation of HRF signal be A HRF and the amplitude attenuation of HPLC signal be A HPLC , and calculate the amplitude attenuation error A caused by multipath effect error , the formula is: A error = A HRF -A HPLC , where A HRF is the amplitude attenuation of HRF signal, A HPLC is the amplitude attenuation of HPLC signal, and A error is the amplitude attenuation error caused by multipath effect;

[0097] phase change data integration subunit: for receiving the phase change data provided by the signal analysis subunit, let the phase change of HRF signal be and the phase change of HPLC signal be , and calculate the phase synchronization error , the formula is: wherein, is the phase change of HRF signal, is the phase change of HPLC signal, is the phase synchronization error caused by multipath effect;

[0098] integrated error generation subunit, for combining the time synchronization error Δt error , the amplitude attenuation error A erro r and the phase synchronization error to generate multipath synchronization error information through the following weighted average algorithm: wherein, E total is the multipath error, w t , w A and are the weighted coefficients of time synchronization error, amplitude attenuation error and phase synchronization error, and satisfy The weights of each error term are adjusted according to actual conditions; through the above error information generation scheme, a variety of signal characteristics (such as time difference, amplitude attenuation and phase change) can be effectively combined to comprehensively evaluate and calculate the synchronization error caused by the multipath effect, so as to accurately generate multipath synchronization error information, which will further optimize the time-frequency synchronization performance, and effectively improve the time-frequency synchronization accuracy of the HPLC and HRF dual-mode communication system in a complex propagation environment.

[0099] The synchronization compensation module comprises a parameter adjustment unit, a synchronization signal generation unit and a control interface unit, wherein:

[0100] The parameter adjustment unit is configured to receive the multipath error information E total output by the error information generation unit, and adjust the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module based on a synchronization parameter adjustment algorithm, with the formula being: wherein θ adjust is the adjustment amount of the synchronization parameter, t is a time variable, dt is a time increment, K p , K i and K d are proportional, integral and differential coefficients respectively, and are suitable for proportional-integral-differential (PID) control algorithm.

[0101] The synchronization signal generation unit is configured to generate a compensated synchronization signal according to the adjustment amount Δθ output by the parameter adjustment unit, and specifically correct the synchronization signal through the following time-frequency adjustment formula: wherein S original is an original synchronization signal, is a phase adjustment factor for correcting the phase offset of the synchronization signal.

[0102] The control interface unit is configured to transmit the compensated synchronization signal S compensated output by the synchronization signal generation unit to the synchronization control module, and send the adjusted synchronization parameter θ adjust to the HPLC communication module and the HRF communication module, so as to realize dynamic adjustment of the time-frequency synchronization parameters.

[0103] The dual-mode fusion module comprises a weight adjustment unit, a signal fusion unit and an output interface unit, wherein:

[0104] The weight adjustment unit is configured to receive the multipath error information E total output by the error information generation unit, and calculate the weight coefficient of the HPLC synchronization signal and the HRF synchronization signal based on the following weight adjustment algorithm, with the formula being: w HRF = 1-w HPLC , wherein w HPLCw is the weight coefficient of the HPLC synchronization signal HRF k is the weight adjustment factor, k is used to control the sensitivity of the weight adjustment, E total is the total error information caused by the multipath effect;

[0105] The signal fusion unit is used to receive the synchronization signal S HPLC from the HPLC communication module and the synchronization signal S HRF from the HRF communication module, and based on the weight coefficients w HPLC and w HRF provided by the weight adjustment unit, the fused synchronization signal is generated by the following signal fusion formula: S fused = w HPLC · S HPLC + w HRF · S HRF , wherein S fused is the fused synchronization signal, S HPLC is the HPLC synchronization signal, S HRF is the HRF synchronization signal, w HPLC and w HRF are the weight coefficients of the respective synchronization signals;

[0106] The output interface unit is used to output the fused synchronization signal S fused generated by the signal fusion unit to the synchronization control module for subsequent synchronization state coordination and control instruction generation; through the above technical solution, the dual-mode fusion module can dynamically adjust the weights of the HPLC and HRF synchronization signals according to the multipath synchronization error information, and generate a fused synchronization signal using a linear weighted fusion algorithm. This process ensures that under the influence of the multipath effect, the synchronization signals of the two communication modes can be combined with the optimal weight, achieving high-quality time-frequency synchronization.

[0107] The synchronization control module includes a signal comparison unit, a control instruction generation unit, and a communication interface unit, wherein:

[0108] The signal comparison unit is used to receive the compensated synchronization signal output by the synchronization compensation module and the fused synchronization signal output by the dual-mode fusion module, and calculate the synchronization state difference AS of the two, the formula is: AS = S fused - S compensated , wherein S fused is the fused synchronization signal; S compensated is the compensated synchronization signal; and AS is the synchronization state difference;

[0109] The control instruction generation unit generates the corresponding control instruction based on the synchronization state difference AS calculated by the signal comparison unit, and the formula is: Wherein, C is a control instruction; K p is a proportional coefficient; K i is an integral coefficient; K d is a differential coefficient; ΔS is a synchronization state difference; t is a time variable; ∫ΔSdt is an integral of the synchronization state difference; is a differential of the synchronization state difference;

[0110] The communication interface unit is used to transmit the control instruction C output by the control instruction generation unit to the HPLC communication module and the HRF communication module, so as to realize dynamic adjustment of the time-frequency synchronization parameters; through the above technical solution, the synchronization control module can accurately identify the synchronization state difference between the compensated synchronization signal and the fused synchronization signal, and generate accurate control instructions based thereon to guide the HPLC communication module and the HRF communication module to dynamically adjust their time-frequency synchronization parameters, which ensures that the system can coordinate the synchronization state in real time under the influence of the multipath effect, and significantly improves the accuracy of time-frequency synchronization and the overall performance of the system.

[0111] The monitoring feedback module includes a monitoring unit, a data collection unit, and a data transmission unit; wherein:

[0112] The monitoring unit is used to continuously monitor the running state and time-frequency synchronization effect of the system;

[0113] The monitoring unit specifically includes:

[0114] The running state monitoring subunit is used to monitor the running state data of each module of the system (including the HPLC communication module, the HRF communication module, the multipath detection module, the synchronization compensation module, the dual-mode fusion module, etc.), including signal strength and signal quality, and record relevant data;

[0115] The synchronization effect evaluation subunit is used to evaluate the time-frequency synchronization effect of the system, and calculate the synchronization quality index based on the multipath synchronization error information provided by the error information generation unit, with the formula being: Wherein, Q sync is a synchronization quality index, E total is multipath error information;

[0116] The data collection unit is used to collect the running state data and synchronization quality index provided by the monitoring unit, and arrange them into real-time feedback data;

[0117] The data transmission unit is used to transmit the real-time feedback data to the multipath detection module and the synchronization compensation module for optimization adjustment; through the above technical solution, the synchronization control module can monitor the running state and time-frequency synchronization effect of the system in real time, accurately collect and transmit real-time feedback data, and provide timely and accurate data support for the multipath detection module and the synchronization compensation module.

[0118] As Figure 2 shown, the time-frequency synchronization method based on HPLC and HRF dual-mode communication is realized by the time-frequency synchronization system based on HPLC and HRF dual-mode communication described above, including the following steps:

[0119] S1: simultaneously receiving synchronization signals from the HPLC communication module and the HRF communication module;

[0120] S2: analyzing the HPLC synchronization signal and the HRF synchronization signal received in S1, calculating the arrival time difference, amplitude attenuation and phase change;

[0121] S3: based on the arrival time difference, amplitude attenuation and phase change calculated in step S2, generating multi-path synchronization error information;

[0122] S4: adjusting the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module according to the multi-path synchronization error information generated in S3, and generating compensated synchronization signals;

[0123] S5: based on the multi-path synchronization error information generated in S3, adjusting the weight coefficients of the HPLC synchronization signal and the HRF synchronization signal, and generating fused synchronization signals;

[0124] S6: based on the compensated synchronization signals and the fused synchronization signals generated in S4 and S5, calculating the synchronization state difference, and generating control instructions to adjust the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module;

[0125] S7: continuously monitoring the running state and time-frequency synchronization effect of the system, collecting real-time feedback data, and transmitting it to the multi-path detection module and the synchronization compensation module for optimization adjustment; this method ensures that the system can respond and optimize the synchronization state in real time under complex communication environment, significantly improves the communication quality and the stability of data transmission, and has wide application prospect and practical value.

[0126] The present application encompasses any alternative, modification, equivalent method and scheme made on the essence and scope of the present application. In order for the public to have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details by those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0127] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A time-frequency synchronization system based on HPLC and HRF dual-mode communication, characterized in that: It includes multi-path detection module, synchronous compensation module, dual-mode fusion module, synchronous control module and monitoring feedback module; Multipath detection module: used to receive the synchronization signals of the HPLC communication module and the HRF communication module, and identify and quantify the synchronization error caused by the multipath effect by analyzing the arrival time difference, amplitude attenuation and phase change of the signals, and output the multipath error information; Synchronous compensation module: used to receive the multipath error information output by the multipath detection module, adjust the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module according to the multipath error information, and output the compensated synchronization signal; Dual-mode fusion module: used to receive the synchronization signals from the HPLC communication module and the HRF communication module, and adjust the weights of the two signals for fusion based on the multipath error information provided by the multipath detection module, and output the fused synchronization signal; Synchronous control module: connected to the synchronous compensation module and the dual-mode fusion module, used to receive the compensated synchronization signal and the fused synchronization signal to coordinate the time-frequency synchronization status of the HPLC communication module and the HRF communication module, and output control instructions; Monitoring and feedback module: used to continuously monitor the system's operating status and synchronization effect, and collect real-time feedback data for optimization and adjustment by the multipath detection module and synchronization compensation module; The multipath detection module includes a synchronization signal receiving unit, a signal analysis unit and an error information generating unit; wherein: Synchronous signal receiving unit: used to simultaneously receive synchronization signals from the HPLC communication module and the HRF communication module. The synchronization signal receiving unit is configured with a clock synchronization interface and a signal receiving interface. The clock synchronization interface synchronizes the HPLC synchronization signal and the HRF synchronization signal through a phase-locked loop circuit to ensure that the time base of the received signals is consistent. The signal receiving interface is used to connect the HPLC communication module and the HRF communication module to receive and convert the synchronization signals from the two communication modules. Signal analysis unit: used for analyzing the HPLC synchronization signal and HRF synchronization signal received by the synchronization signal receiving unit; The signal analysis unit specifically includes: Arrival time difference analysis subunit: used to measure the arrival time difference between the HPLC synchronization signal and the HRF synchronization signal, and record the relevant data; Amplitude attenuation analysis subunit: used to evaluate the amplitude attenuation of the synchronization signal caused by the multipath effect during the propagation process and generate attenuation parameters; Phase change analysis subunit: used to detect the phase change caused by the synchronization signal during multipath propagation and generate phase offset data; Error information generation unit: Based on the arrival time difference, amplitude attenuation and phase change data provided by the signal analysis unit, it calculates the synchronization error caused by the multipath effect and outputs the multipath error information to the synchronization compensation module and the dual-mode fusion module; The synchronous compensation module includes a parameter adjustment unit, a synchronization signal generation unit and a control interface unit, wherein: Parameter adjustment unit: used to receive the multipath error information output by the error information generation unit , and adjust the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module based on the synchronization parameter adjustment algorithm. The formula is: ,in, is the adjustment amount of the synchronization parameter, is the time variable, is the time increment, 、 and are the proportional coefficient, integral coefficient and differential coefficient respectively; Synchronous signal generation unit: used to adjust the output of the unit according to the parameter , generate the compensated synchronization signal, and the synchronization signal is corrected by the following time-frequency adjustment formula: ,in, is the original synchronization signal, is the phase adjustment factor; Control interface unit: used to convert the compensated synchronization signal output by the synchronization signal generation unit into Passed to the synchronization control module; The dual-mode fusion module includes a weight adjustment unit, a signal fusion unit, and an output interface unit, wherein: Weight adjustment unit: used to receive the multipath error information output by the error information generation unit , and the weight coefficients of the HPLC synchronization signal and the HRF synchronization signal are calculated based on the following weight adjustment algorithm, the formula is: ; ,in, is the weight coefficient of HPLC synchronization signal, is the weight coefficient of the HRF synchronization signal, is the weight adjustment factor, is the total error information caused by multipath effect; Signal fusion unit: used to receive synchronization signals from HPLC communication module and synchronization signals from the HRF communication module , and based on the weight coefficient provided by the weight adjustment unit and , the fused synchronization signal is generated by the following signal fusion formula: ,in, is the fused synchronization signal, is the HPLC synchronization signal, is the HRF synchronization signal, and is the weight coefficient of each synchronization signal; Output interface unit: used to synchronize the fused signal generated by the signal fusion unit Output to the synchronization control module; The synchronization control module includes a signal comparison unit, a control instruction generation unit and a communication interface unit, wherein: Signal comparison unit: used to receive the compensated synchronization signal output by the synchronization compensation module and the fused synchronization signal output by the dual-mode fusion module, and calculate the synchronization state difference between the two ; Control instruction generation unit: based on the synchronization state difference calculated by the signal comparison unit , the corresponding control instructions are generated through the following control algorithm, the formula is: ,in, For control instructions; is the proportionality coefficient; is the integration coefficient; is the differential coefficient; is the synchronization status difference; is the time variable; is the integral of the synchronization state difference; is the differential of the synchronization state difference; Communication interface unit: used to generate control instructions from the control instruction generation unit The data are transmitted to the HPLC communication module and the HRF communication module to achieve dynamic adjustment of the time-frequency synchronization parameters.

2. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 1, characterized in that: The amplitude attenuation analysis subunit specifically includes: Measure signal strength: measure the signal strength of the received HPLC synchronization signal and HRF synchronization signal; Get standard signal strength: Get the standard signal strength before transmission; Calculate the attenuation factor: Calculate the attenuation factor of the HPLC synchronization signal and the HRF synchronization signal according to the following formula: ,in, Represents the signal strength of the received HPLC synchronization signal and HRF synchronization signal, Represents the corresponding standard signal strength before transmission and , is the attenuation factor of the corresponding synchronization signal; Attenuation parameter generation: According to the following multipath attenuation model formula, combined with the attenuation factor and signal propagation distance, the amplitude attenuation parameter is calculated and generated. , the formula is: ,in, is the attenuated signal amplitude, is the reference signal amplitude, is the calculated attenuation factor, is the signal propagation distance.

3. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 2, characterized in that: The phase change analysis subunit includes: Synchronous signal preprocessing: Filter and remove noise from the received HPLC synchronous signal and HRF synchronous signal to provide a clean data source for subsequent phase analysis; Phase calculation: Calculate the phase value of the signal based on the received synchronization signal, and calculate the phase change using the following formula: ,in, is the phase change, is the phase of the received synchronization signal, is the phase of the reference signal; Phase change detection: based on the calculated phase change , determine the phase offset caused by the synchronization signal during multipath propagation and convert it into phase offset data; specifically, the phase drift is detected by the following phase drift detection algorithm, the formula is: ,in, is the phase drift, For the The phase change at each time point, is the number of sample points in the time window; Generate phase offset data: The phase drift as phase offset data.

4. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 3, characterized in that: The error information generating unit includes: Arrival time difference data integration subunit: used to receive the arrival time difference data provided by the signal analysis unit and calculate the time synchronization error caused by the multipath effect according to the following formula , the formula is: ,in, is the arrival time difference of the HRF communication signal, is the arrival time difference of the HPLC communication signal, is the time synchronization error caused by multipath effect; Amplitude attenuation data integration subunit: used to receive the amplitude attenuation data provided by the signal analysis subunit. Assume that the amplitude attenuation of the HRF signal is The amplitude attenuation of the HPLC signal is , and calculate the amplitude attenuation error caused by multipath effect ; Phase change data integration subunit: used to receive the phase change data provided by the signal analysis subunit. Assume that the phase change of the HRF signal is The phase change of the HPLC signal is , and calculate the phase synchronization error ; The integrated error generation subunit is used to convert the time synchronization error , amplitude attenuation error and phase synchronization error Combined, multipath synchronization error information is generated through the following weighted average algorithm: ,in, is the multipath error, and is the weighting coefficient of time synchronization error, amplitude attenuation error and phase synchronization error, and satisfies .

5. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 1, characterized in that: The monitoring feedback module includes a monitoring unit, a data collection unit and a data transmission unit; wherein: Monitoring unit: used to continuously monitor the system's operating status and time-frequency synchronization effect; The monitoring unit specifically includes: Operation status monitoring subunit: used to monitor the operation status data of each module of the system in real time, including signal strength and signal quality, and record relevant data; Synchronization effect evaluation subunit: used to evaluate the time-frequency synchronization effect of the system. It calculates the synchronization quality index based on the multipath synchronization error information provided by the error information generation unit. The formula is: in, is the synchronization quality indicator, is the multipath error information; Data collection unit: used to collect the operating status data and synchronization quality indicators provided by the monitoring unit and organize them into real-time feedback data; Data transmission unit: used to transmit real-time feedback data to the multipath detection module and the synchronous compensation module for optimization and adjustment.

6. A time-frequency synchronization method based on HPLC and HRF dual-mode communication, implemented by the time-frequency synchronization system based on HPLC and HRF dual-mode communication according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Receive synchronization signals from the HPLC communication module and the HRF communication module simultaneously; S2: Analyze the HPLC synchronization signal and HRF synchronization signal received in S1 and calculate their arrival time difference, amplitude attenuation and phase change; S3: Generate multipath synchronization error information based on the arrival time difference, amplitude attenuation and phase change calculated in step S2; S4: adjusting the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module according to the multipath synchronization error information generated in S3, and generating a compensated synchronization signal; S5: Based on the multipath synchronization error information generated in S3, the weight coefficients of the HPLC synchronization signal and the HRF synchronization signal are adjusted, and a fused synchronization signal is generated; S6: Based on the compensated synchronization signal and the fused synchronization signal generated in S4 and S5, the synchronization state difference is calculated, and a control instruction is generated to adjust the time-frequency synchronization parameters of the HPLC communication module and the HRF communication module; S7: Continuously monitor the system's operating status and time-frequency synchronization effects, collect real-time feedback data, and transmit it to the multipath detection module and synchronization compensation module for optimization and adjustment.

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