Time frequency synchronization system and method based on HPLC and HRF dual-mode communication

Abstract

The invention relates to the technical field of communication, in particular to a time-frequency synchronization system and method based on HPLC and HRF dual-mode communication, and the system comprises a multi-path detection module, a synchronous compensation module, a dual-mode fusion module, a synchronous control module and a monitoring feedback module. The multi-path detection module is used for identifying and quantifying a synchronization error caused by a multi-path effect; the synchronous compensation module is used for outputting a compensated synchronous signal; the dual-mode fusion module is used for outputting a fused synchronous signal; and the synchronous control module is used for receiving the compensated synchronous signal and the fused synchronous signal so as to coordinate the time-frequency synchronous state of the HPLC communication module and the HRF communication module and output a control instruction. According to the invention, the multi-path effect is accurately analyzed, and real-time synchronous compensation and signal fusion are carried out, so that the time-frequency synchronization precision, stability and transmission efficiency of the dual-mode communication system are effectively improved, and the problem of synchronization errors caused by the multi-path effect is solved.

Description

Technical Field

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

[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 a variety of complex communication scenarios, such as Internet of Vehicles, Internet of Things, and intelligent manufacturing; due to the different transmission characteristics and multipath effects of HPLC and HRF systems during signal transmission, their time-frequency synchronization problems are becoming increasingly prominent; multipath effects can cause signal delays, amplitude attenuation, and phase shifts, which poses huge challenges to synchronization accuracy and system stability.

[0003] However, most of the existing time-frequency synchronization technologies rely on a single signal source or a simple synchronization method, which cannot effectively solve the time-frequency synchronization problem in dual-mode communication systems; traditional time-frequency synchronization methods often ignore the impact of multipath effects, resulting in synchronization error accumulation and low transmission efficiency; in addition, the synchronization compensation algorithms in the existing technologies also focus on the adjustment of a single dimension, which makes it difficult to take into account the multiple requirements of time-frequency synchronization and lack the ability to dynamically adjust real-time feedback. Therefore, how to overcome the impact of multipath effects on synchronization accuracy in a complex dual-mode communication environment and achieve efficient and accurate time-frequency synchronization is still a technical problem that needs to be solved urgently. Summary of the invention

[0004] Based on the above objectives, the present invention 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 multi-path detection module, a synchronization compensation module, a dual-mode fusion module, a synchronization control module and a monitoring feedback module;

[0006] 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 signal, and output the multipath error information;

[0007] Synchronous compensation module: 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 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;

[0009] 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 state of the HPLC communication module and the HRF communication module, and output control instructions;

[0010] Monitoring and feedback module: used to continuously monitor the operating status and synchronization effect of the system, and collect real-time feedback data for optimization and adjustment by the multipath detection module and the synchronization compensation module.

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

[0012] Synchronous signal receiving unit: used to simultaneously receive the synchronous signals from the HPLC communication module and the HRF communication module, the synchronous signal receiving unit is configured with a clock synchronization interface and a signal receiving interface; wherein the clock synchronization interface realizes the clock synchronization of the HPLC synchronous signal and the HRF synchronous signal through a phase-locked loop circuit to ensure that the time reference of the received signal is consistent; the signal receiving interface is used to connect the HPLC communication module and the HRF communication module, and receive and convert the synchronous 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 to measure the arrival time difference between the HPLC synchronization signal and the HRF synchronization signal, and record the relevant data;

[0016] 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;

[0017] Phase change analysis subunit: used to detect the phase change caused by the synchronization signal during multipath propagation and generate 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, 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.

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

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

[0021] Get standard signal strength: Get the standard signal strength before transmission;

[0022] Calculate the attenuation factor: Calculate the attenuation factor of the HPLC synchronization signal and the HRF synchronization signal according to the following formula: Among them, P received represents the signal strength 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;

[0023] Attenuation parameter generation: According to the following multipath 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 = A 0 +α·log 10 (d), where A is the attenuated signal amplitude, A 0 is the reference signal amplitude, α is the calculated attenuation factor, and d is the signal propagation distance.

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

[0025] Synchronous signal preprocessing: Filter and denoise the received HPLC synchronous signal and HRF synchronous signal to provide a clean data source for subsequent phase analysis;

[0026] Calculate phase: 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;

[0027] Phase change detection: based on the calculated phase change Determine the phase shift caused by the synchronization signal during multipath propagation and convert it into phase shift data; specifically, the phase drift is detected by the following phase drift detection algorithm, and the formula is: in, is the phase drift, is the phase change at the nth time point, and N is the number of sample points in the time window;

[0028] Generate phase shift data: The phase shift amount as phase shift 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. Suppose 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 total, 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: Among them, θ adjust is the adjustment amount of synchronization parameters, t is the time variable, dt is the time increment, K p , K i and K d are proportional coefficient, integral coefficient and differential coefficient respectively;

[0036] The synchronization signal generating unit is used to generate a compensated synchronization signal according to the adjustment amount Δθ output by the parameter adjustment unit, and specifically realizes the correction of the synchronization signal through the following time-frequency adjustment formula: Among them, S original is the original synchronization signal, is the phase adjustment factor;

[0037] Control interface unit: used to convert the compensated synchronization signal S output by the synchronization signal generation unit into compensated Passed to the synchronization control module.

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

[0039] Weight adjustment unit: used to receive the multipath error information E output by the error information generation unit total , 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: w HRF =1-w HPLC , where w HPLC is the weight coefficient of HPLC synchronization signal, w HRF is the weight coefficient of the HRF synchronization signal, k is the weight adjustment factor, E total is the total error information caused by multipath effect;

[0040] Signal fusion unit: used to receive the synchronization signal S from the HPLC communication module HPLC and the synchronization signal S from the HRF communication module HRF , and based on the weight coefficient w provided by the weight adjustment unit HPLC and w HRF , the fused synchronization signal is generated by the following signal fusion formula: S fused =w HPLC ·S HPLC +w HRF ·S HRF , where 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] A 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 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, and the formula is: Among them, C is the control instruction; K p is the proportionality 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 the 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 operating status and time-frequency synchronization effect of the system;

[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, and calculate 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 operation 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, a 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 operating status and time-frequency synchronization effect of the system, collect real-time feedback data, and transmit it to the multipath detection module and the 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 the multipath effect in a dual-mode communication system by comprehensively adopting multipath effect detection and synchronization compensation technology; specifically, by accurately analyzing the arrival time difference, amplitude attenuation and phase change of the communication signal, the influence of the multipath effect on the synchronization accuracy can be identified and quantified in real time, thereby effectively reducing the accumulation of synchronization errors.

[0063] The present invention improves the reliability and stability of time-frequency synchronization by comprehensively analyzing HPLC and HRF communication signals, dynamically adjusting synchronization parameters, and optimizing the fusion process of synchronization signals; it not only solves the limitation of the prior art that the multipath effect cannot be effectively processed, but also improves the transmission efficiency and anti-interference ability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0065] Figure 1 A schematic diagram of a time-frequency synchronization system for dual-mode communication according to an embodiment of the present invention;

[0066] Figure 2 Schematic diagram of a time-frequency synchronization method for dual-mode communication according to an embodiment of the present invention. DETAILED DESCRIPTION

[0067] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0068] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0069] In general, a term can be understood, at least in part, from its 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 sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0070] like Figure 1As shown, a 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] 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 signal, and output the multipath error information;

[0072] Synchronous compensation module: 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;

[0073] 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;

[0074] 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 state of the HPLC communication module and the HRF communication module, and output control instructions;

[0075] Monitoring and feedback module: used to continuously monitor the operating status and synchronization effect of the system, and collect real-time feedback data for optimization and adjustment by the multipath detection module and the synchronization compensation module.

[0076] The multipath detection module includes a synchronization signal receiving unit, a signal analysis unit and an error information generating unit; wherein:

[0077] Synchronous signal receiving unit: used to simultaneously receive the synchronous signals from the HPLC communication module and the HRF communication module, the synchronous signal receiving unit is configured with a clock synchronization interface and a signal receiving interface; wherein the clock synchronization interface realizes the clock synchronization of the HPLC synchronous signal and the HRF synchronous signal through a phase locked loop (PLL) circuit to ensure the consistency of the time reference of the received signal; the signal receiving interface is used to connect the HPLC communication module and the HRF communication module, receive and convert the synchronous signals from the two communication modules to the digital signal processing unit;

[0078] Signal analysis unit: used for analyzing 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 a phase-locked loop (PLL) circuit as a 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 on the time reference; each analysis subunit 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 strength 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 multipath 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 = A 0 +α·log 10 (d), where A is the attenuated signal amplitude, A 0 is the reference signal amplitude, α is the calculated attenuation factor, and d is the signal propagation distance.

[0089] The phase change analysis subunit includes:

[0090] Synchronous signal preprocessing: Filter and denoise the received HPLC synchronous signal and HRF synchronous signal to ensure the clarity and accuracy of the signal and provide a clean data source for subsequent phase analysis;

[0091] Calculate phase: 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; 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 Determine the phase shift caused by the synchronization signal during multipath propagation and convert it into phase shift data; specifically, the phase drift is detected by the following phase drift detection algorithm, and the formula is: in, is the phase drift, is the phase change at the nth time point, and N is the number of sample points in the time window;

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

[0094] The error information generating unit comprises:

[0095] 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 -ΔtHPLC , 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;

[0096] Amplitude attenuation data integration subunit: used to receive the amplitude attenuation data provided by the signal analysis subunit. Suppose 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 , the formula is: A error =A HRF -A HPLC , where A HRF is the amplitude attenuation of the HRF signal, A HPLC is the amplitude attenuation of HPLC signal, A error is the amplitude attenuation error caused by multipath effect;

[0097] 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 formula is: in, is the phase change of the HRF signal, is the phase change of HPLC signal, is the phase synchronization error caused by multipath effect;

[0098] The comprehensive error generation subunit is used to convert the time synchronization error Δt error , Amplitude attenuation error A erro r 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 The weight of each error term is adjusted according to the actual situation; through the above error information generation scheme, it is possible to effectively combine multiple signal characteristics (such as arrival time difference, amplitude attenuation and phase change), comprehensively evaluate and calculate the synchronization error caused by the multipath effect, and accurately generate multipath synchronization error information. This error information 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 synchronous compensation module includes a parameter adjustment unit, a synchronous signal generation unit and a control interface unit, wherein:

[0100] Parameter adjustment unit: used to receive the multipath error information E output by the error information generation unit total , 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: Among them, θ adjust is the adjustment amount of synchronization parameters, t is the time variable, dt is the time increment, K p , K i and K d They are proportional coefficient, integral coefficient and differential coefficient respectively, which are applicable to proportional-integral-differential (PID) control algorithm;

[0101] The synchronization signal generating unit is used to generate a compensated synchronization signal according to the adjustment amount Δθ output by the parameter adjustment unit, and specifically realizes the correction of the synchronization signal through the following time-frequency adjustment formula: Among them, S original is the original synchronization signal, is the phase adjustment factor, used to correct the phase offset of the synchronization signal;

[0102] Control interface unit: used to convert the compensated synchronization signal S output by the synchronization signal generation unit into compensated The adjusted synchronization parameter θ is transmitted to the synchronization control module. adjust Sent to the HPLC communication module and the HRF communication module to achieve dynamic adjustment of time-frequency synchronization parameters.

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

[0104] Weight adjustment unit: used to receive the multipath error information E output by the error information generation unit total , 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: w HRF =1-w HPLC , where w HPLCis the weight coefficient of HPLC synchronization signal, w HRF is the weight coefficient of the HRF synchronization signal, k is the weight adjustment factor, which is used to control the sensitivity of the weight adjustment, and E total is the total error information caused by multipath effect;

[0105] Signal fusion unit: used to receive the synchronization signal S from the HPLC communication module HPLC and the synchronization signal S from the HRF communication module HRF , and based on the weight coefficient w provided by the weight adjustment unit HPLC and w HRF , the fused synchronization signal is generated by the following signal fusion formula: S fused =w HPLC ·S HPLC +w HRF ·S HRF , where 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 is the weight coefficient of each synchronization signal;

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

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

[0108] 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. The formula is: ΔS = S fused -S compensated , where S fused is the fused synchronization signal; S compensated is the compensated synchronization signal; ΔS is the synchronization state difference;

[0109] 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, and the formula is: Among them, C is the control instruction; K p is the proportionality 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;

[0110] 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 realize dynamic adjustment of the time-frequency synchronization parameters; through the above technical scheme, the synchronization control module can accurately identify the synchronization state difference between the compensated synchronization signal and the fused synchronization signal, and generate precise control instructions based on this, guiding the HPLC communication module and the HRF communication module to dynamically adjust their time-frequency synchronization parameters. This method ensures that the system can coordinate the synchronization state in real time under the influence of multipath effects, significantly improving 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] Monitoring unit: used to continuously monitor the operating status and time-frequency synchronization effect of the system;

[0113] The monitoring unit specifically includes:

[0114] Operation status monitoring subunit: used to monitor the operation status data of each module of the system (including HPLC communication module, HRF communication module, multipath detection module, synchronous compensation module, dual-mode fusion module, etc.) in real time, including signal strength and signal quality, and record relevant data;

[0115] Synchronization effect evaluation subunit: 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. The formula is: Among them, Q sync is the synchronization quality index, E total is the multipath error information;

[0116] Data collection unit: used to collect the operation status data and synchronization quality indicators provided by the monitoring unit, and organize them into real-time feedback data;

[0117] Data transmission unit: used to transmit real-time feedback data to the multi-path detection module and the synchronization compensation module for optimization and adjustment; through the above technical solution, the synchronization control module can monitor the operating status 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 multi-path detection module and the synchronization compensation module.

[0118] like Figure 2 As shown, 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:

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

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

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

[0122] 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;

[0123] 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;

[0124] S6: Based on the compensated synchronization signal and the fused synchronization signal generated in S4 and S5, a 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;

[0125] S7: Continuously monitor the system's operating status and time-frequency synchronization effect, collect real-time feedback data, and transmit it to the multipath detection module and synchronization compensation module for optimization and adjustment; this method ensures that in a complex communication environment, the system can respond in real time and optimize the synchronization status, significantly improving the communication quality and data transmission stability, and has broad application prospects and practical value.

[0126] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0127] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A time-frequency synchronization system based on HPLC and HRF dual-mode communication, characterized in that: It includes a multi-path detection module, a synchronous compensation module, a dual-mode fusion module, a synchronous control module and a 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 signal, and output the multipath error information; Synchronous compensation module: 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; 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 state of the HPLC communication module and the HRF communication module, and output control instructions; Monitoring and feedback module: used to continuously monitor the operating status and synchronization effect of the system, and collect real-time feedback data for optimization and adjustment by the multipath detection module and the synchronization compensation module.

2. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 1, characterized in that: 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 the synchronous signals from the HPLC communication module and the HRF communication module, the synchronous signal receiving unit is configured with a clock synchronization interface and a signal receiving interface; wherein the clock synchronization interface realizes the clock synchronization of the HPLC synchronous signal and the HRF synchronous signal through a phase-locked loop circuit to ensure that the time reference of the received signal is consistent; the signal receiving interface is used to connect the HPLC communication module and the HRF communication module, and receive and convert the synchronous signals from the two communication modules; Signal analysis unit: used for analyzing the HPLC synchronization signal and the 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.

3. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 2, characterized in that: The amplitude attenuation analysis subunit specifically includes: Measuring signal strength: measuring 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: Among them, P received represents the signal strength 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; Attenuation parameter generation: According to the following multipath 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 + α·log 10 (d), where A is the attenuated signal amplitude, A0 is the reference signal amplitude, α is the calculated attenuation factor, and d is the signal propagation distance.

4. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 3, characterized in that: The phase change analysis subunit comprises: Synchronous signal preprocessing: Filter and denoise the received HPLC synchronous signal and HRF synchronous signal to provide a clean data source for subsequent phase analysis; Calculate phase: 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 shift caused by the synchronization signal during multipath propagation and convert it into phase shift data; specifically, the phase drift is detected by the following phase drift detection algorithm, and the formula is: in, is the phase drift, is the phase change at the nth time point, and N is the number of sample points in the time window; Generate phase shift data: The phase shift amount as phase shift data.

5. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 4, characterized in that: The error information generating unit comprises: 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; Amplitude attenuation data integration subunit: used to receive the amplitude attenuation data provided by the signal analysis subunit. Suppose 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 ; 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 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 6. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 5, characterized in that: 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 E output by the error information generation unit total , 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: Among them, θ adjust is the adjustment amount of synchronization parameters, t is the time variable, dt is the time increment, K p , K i and K d are proportional coefficient, integral coefficient and differential coefficient respectively; The synchronization signal generating unit is used to generate a compensated synchronization signal according to the adjustment amount Δθ output by the parameter adjustment unit, and specifically realizes the correction of the synchronization signal through the following time-frequency adjustment formula: Among them, S original is the original synchronization signal, is the phase adjustment factor; Control interface unit: used to convert the compensated synchronization signal S output by the synchronization signal generation unit into compensated Passed to the synchronization control module.

7. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 5, characterized in that: 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 E output by the error information generation unit total , 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: w HRF =1-w HPLC , where w HPLC is the weight coefficient of HPLC synchronization signal, w HRF is the weight coefficient of the HRF synchronization signal, k is the weight adjustment factor, E total is the total error information caused by multipath effect; Signal fusion unit: used to receive the synchronization signal S from the HPLC communication module HPLC and the synchronization signal S from the HRF communication module HRF , and based on the weight coefficient w provided by the weight adjustment unit HPLC and w HRF , the fused synchronization signal is generated by the following signal fusion formula: S fused =w HPLC ·S HPLC +w HRF ·S HRF , where 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 is the weight coefficient of each synchronization signal; Output interface unit: used to output the fused synchronization signal S generated by the signal fusion unit fused Output to the synchronization control module.

8. The time-frequency synchronization system based on HPLC and HRF dual-mode communication according to claim 7, characterized in that: The synchronization control module includes a signal comparison unit, a control instruction generation unit and a communication interface unit, wherein: A 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 ΔS between the two; 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, and the formula is: Among them, C is the control instruction; K p is the proportionality 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; 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 the time-frequency synchronization parameters.

9. 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 operating status and time-frequency synchronization effect of the system; 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, and calculate 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; Data collection unit: used to collect the operation 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.

10. 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 9, 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, a 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 operating status and time-frequency synchronization effect of the system, collect real-time feedback data, and transmit it to the multipath detection module and the synchronization compensation module for optimization and adjustment.

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