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CN116577813A - A high precision time difference measurement system based on interpolation calculation - Google Patents

A high precision time difference measurement system based on interpolation calculation Download PDF

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Publication number
CN116577813A
CN116577813A CN202310399126.XA CN202310399126A CN116577813A CN 116577813 A CN116577813 A CN 116577813A CN 202310399126 A CN202310399126 A CN 202310399126A CN 116577813 A CN116577813 A CN 116577813A
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time difference
pulse signals
value
difference measurement
phase difference
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李志强
邵震洪
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Space E Star Communication Technology Co ltd
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Space E Star Communication Technology Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/35—Constructional details or hardware or software details of the signal processing chain
    • G01S19/37—Hardware or software details of the signal processing chain
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

本发明公开了一种基于插值计算的高精度时差测量系统，包括：数据处理单元，基于获取的数据信号中的至少两路脉冲信号进行平滑滤波，得到脉冲信号对应的时间差估算值；分析处理单元，基于获取的数据信号中的脉冲信号，并根据获取得时间差估算值，以及系统预设的额定时间差估算值和相位差估算值之间的对应关系，确定脉冲信号的相位差估算值；校正单元，用于对于数据信号的至少两路脉冲信号中，并对同一时间段内的对两路脉冲信号进行一致性校正。该发明提供的基于插值计算的高精度时差测量系统，通过联合测向处理运算可以更加精确的拟合出关于时间差的一次曲线，获得更高精度的曲线斜率，提高了时间差的估计精度。

The invention discloses a high-precision time difference measurement system based on interpolation calculation, which includes: a data processing unit, which performs smoothing and filtering based on at least two pulse signals in the acquired data signal to obtain an estimated time difference corresponding to the pulse signal; an analysis processing unit , based on the pulse signal in the acquired data signal, and according to the obtained estimated time difference, and the corresponding relationship between the system preset rated time difference estimated value and phase difference estimated value, determine the phase difference estimated value of the pulse signal; the correction unit , used in at least two pulse signals of the data signal, and performing consistency correction on the two pulse signals in the same time period. The high-precision time difference measurement system based on interpolation calculation provided by the invention can more accurately fit the primary curve about the time difference through joint direction-finding processing operations, obtain a higher-precision curve slope, and improve the estimation accuracy of the time difference.

Description

High-precision time difference measurement system based on interpolation calculation
Technical Field
The application relates to the technical field of signal processing, in particular to a high-precision time difference measurement system based on interpolation calculation.
Background
A typical application in which targets locate themselves using signals from multiple known sources is the GPS global satellite positioning system, which is primarily aimed at providing real-time navigation services for land, sea, and air. However, since the signal form of the radiation source is known, the receiver is very susceptible to electromagnetic interference, resulting in reduced positioning performance. In addition, the response time of the GPS receiver is relatively long, when the target is at a high speed, high spin, high overload.
The passive positioning of the acoustic array is a detection technology for realizing positioning by utilizing a target audio signal, and the sound is a typical mechanical wave, can bypass the propagation of obstacles and is not easily influenced by the terrain condition. Because the system works in a passive mode, the system has strong concealment. However, the acoustic array positioning system has the disadvantage of smaller detection range, and the acoustic sensor in the array can detect the audio signal only when the moving target enters a certain range, so that the positioning is realized, and therefore, the acoustic array positioning system has a limitation.
Disclosure of Invention
The application aims to provide a high-precision time difference measurement system based on interpolation calculation, which is used for solving the problems.
In order to achieve the above object, the present application provides the following technical solutions: a high accuracy time difference measurement system based on interpolation computation, comprising:
the data processing unit performs smoothing filtering based on at least two paths of pulse signals in the acquired data signals to obtain a time difference estimated value corresponding to the pulse signals;
the analysis processing unit is used for determining a phase difference estimated value of the pulse signal based on the pulse signal in the acquired data signal and according to the acquired time difference estimated value and the corresponding relation between a rated time difference estimated value and a phase difference estimated value preset by a system;
the correction unit is used for carrying out consistency correction on two paths of pulse signals in the same time period in at least two paths of pulse signals of the data signals to obtain time phase calibration coefficients between the two paths of pulse signals, and correcting time difference estimated values and phase difference estimated values corresponding to the two paths of pulse signals through the time phase calibration coefficients to respectively obtain time difference measured values and phase difference measured values;
and the verification unit is used for carrying out joint direction finding processing operation on at least two paths of pulse signals of the data signals according to the time difference measured value and the phase difference measured value corresponding to the two paths of pulse signals and judging the given calibration time data.
Preferably, the data signal includes at least two pulse signals of each of the two pulse signals.
Preferably, the time difference estimation value is calculated as follows:
where τ represents the time difference estimate and P represents F (m) I represents F (m) Number of interval interpolations, F (m) Representing a discrete fourier transform operation.
Preferably, the time difference estimation value processing is based on each two pulse signals in at least two pulse signals of the digital signal type, interpolation operation is performed on the time difference measurement values by using a surface fitting algorithm according to the time difference measurement values corresponding to the two pulse signals to obtain a plurality of difference points, a quadric surface with an upward opening is determined according to the difference points, and a time difference measurement value group is obtained based on the quadric surface, wherein the formula is as follows:
wherein ,delta tau is the error between the theoretical value of the time difference and the measured value of the time difference;
based on the above formula, a phase difference measurement value group for determining a plurality of interpolation points is determined, and the formula is as follows:
wherein γ (θ) represents the similarityThe function of the function is that,representing the phase difference measurement, +.>The theoretical value of the phase difference corresponding to the ith interpolation is represented, and i represents the number of the interpolation.
Preferably, the calculation is performed based on the obtained phase difference measurement value set and the time difference measurement value set to obtain the determined blur value k, and the formula is as follows:
wherein θ represents a direction-finding angle value, represents a phase difference measurement value, d represents a distance between two distributed antenna array elements, λ represents a wavelength of the pulse signal, and arccos represents an inverse cosine operation.
Preferably, the distance between the two distributed antenna array elements is substituted into a rated value range angle comparison table preset by the system based on the obtained difference measurement value and the obtained phase difference measurement value so as to obtain the direction finding angle.
Preferably, the phase difference estimation value performs FFT conversion on the two paths of pulse signals based on each two paths of acquired pulse signals, so as to obtain two paths of converted pulse signals, and then performs conjugate multiplication on the two paths of pulse signals on a frequency domain.
In the technical scheme, the high-precision time difference measurement system based on interpolation calculation has the following beneficial effects: the primary curve related to the time difference can be more accurately fitted through combined direction finding processing operation, so that the curve slope with higher precision is obtained, and the estimation precision of the time difference is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic diagram of a unit structure according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1, a high-precision time difference measurement system based on interpolation calculation includes:
example 1
The data processing unit performs smoothing filtering based on at least two paths of pulse signals in the acquired data signals to obtain a time difference estimated value corresponding to the pulse signals;
the analysis processing unit is used for determining a phase difference estimated value of the pulse signal based on the pulse signal in the acquired data signal and according to the acquired time difference estimated value and the corresponding relation between the rated time difference estimated value and the phase difference estimated value preset by the system;
the correction unit is used for carrying out consistency correction on the two paths of pulse signals in the same time period in at least two paths of pulse signals of the data signals to obtain a time phase calibration coefficient between the two paths of pulse signals, and correcting a time difference estimated value and a phase difference estimated value corresponding to the two paths of pulse signals through the time phase calibration coefficient to respectively obtain a time difference measured value and a phase difference measured value;
and the verification unit is used for carrying out joint direction finding processing operation on at least two paths of pulse signals of the data signals according to the time difference measured value and the phase difference measured value corresponding to the two paths of pulse signals, and giving judgment on the calibration time data.
Wherein, the data signal at least comprises every two pulse signals in the two pulse signals.
Example two
The time difference estimation value is calculated as follows:
where τ represents the time difference estimate and P represents F (m) I represents F (m) Number of interval interpolations, F (m) Representing a discrete fourier transform operation.
Example III
The method comprises the steps of processing a time difference estimated value, carrying out interpolation operation on time difference measured values by using a curved surface fitting algorithm based on each two pulse signals in at least two pulse signals of a digital signal type according to the time difference measured values corresponding to the two pulse signals to obtain a plurality of difference points, determining a quadric surface with an upward opening according to the plurality of difference points, and obtaining a time difference measured value group based on the quadric surface, wherein the formula is as follows:
wherein ,as an error between the theoretical value of the phase difference and the measured value of the phase difference, Δτ is an error between the theoretical value of the time difference and the measured value of the time difference;
based on the above formula, a phase difference measurement value group for determining a plurality of interpolation points is determined as follows:
wherein gamma (theta) represents a similarity function,representing the phase difference measurement, +.>The theoretical value of the phase difference corresponding to the ith interpolation is represented, and i represents the number of the interpolation.
Further, the fuzzy value k is calculated and obtained based on the obtained phase difference measured value group and the time difference measured value group, and the formula is as follows:
where θ represents a direction-finding angle value, represents a phase difference measurement value, d represents a distance between two distributed antenna elements, λ represents a wavelength of a pulse signal, and arccos represents an inverse cosine operation.
And the distance between the two distributed antenna array elements is substituted into a rated value range angle comparison table preset by the system based on the obtained difference measurement value and the obtained phase difference measurement value so as to obtain the direction finding angle.
Specifically, the nominal value range angle comparison table in the above embodiment belongs to common general knowledge of those skilled in the art, and is not described in detail.
Example IV
And (3) carrying out FFT (fast Fourier transform) on the two paths of pulse signals based on the obtained phase difference estimated value to obtain two paths of transformed pulse signals, and then carrying out conjugate multiplication on the two paths of pulse signals on a frequency domain.
In summary, in the above-mentioned technology, a primary curve related to the time difference can be fitted more accurately by combining the direction-finding processing operation, so as to obtain a curve slope with higher precision, and improve the estimation precision of the time difference.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principles and embodiments of the present application have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
The embodiment of the application also provides a specific implementation mode of the electronic equipment capable of realizing all the steps in the method in the embodiment, and the electronic equipment specifically comprises the following contents:
a processor (processor), a memory (memory), a communication interface (Communications Interface), and a bus;
the processor, the memory and the communication interface complete communication with each other through the bus;
the processor is configured to invoke the computer program in the memory, and when the processor executes the computer program, the processor implements all the steps in the method in the above embodiment.
The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the method in the above embodiments, the computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements all the steps of the method in the above embodiments.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a hardware+program class embodiment, the description is relatively simple, as it is substantially similar to the method embodiment, as relevant see the partial description of the method embodiment. Although the present description provides method operational steps as described in the examples or flowcharts, more or fewer operational steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution. When implemented in an actual device or end product, the instructions may be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment, or even in a distributed data processing environment) as illustrated by the embodiments or by the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, it is not excluded that additional identical or equivalent elements may be present in a process, method, article, or apparatus that comprises a described element. For convenience of description, the above devices are described as being functionally divided into various modules, respectively. Of course, when implementing the embodiments of the present disclosure, the functions of each module may be implemented in the same or multiple pieces of software and/or hardware, or a module that implements the same function may be implemented by multiple sub-modules or a combination of sub-units, or the like. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be appreciated by those skilled in the art that embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, the present specification embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present description embodiments may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present specification.
In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. The foregoing is merely an example of an embodiment of the present disclosure and is not intended to limit the embodiment of the present disclosure. Various modifications and variations of the illustrative embodiments will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the embodiments of the present specification, should be included in the scope of the claims of the embodiments of the present specification.

Claims (9)

1.一种基于插值计算的高精度时差测量系统，其特征在于，包括：1. A high-precision time difference measurement system based on interpolation calculation, characterized in that it comprises: 数据处理单元，基于获取的数据信号中的至少两路脉冲信号进行平滑滤波，得到所述脉冲信号对应的时间差估算值；The data processing unit performs smoothing filtering on at least two pulse signals in the acquired data signal to obtain the estimated time difference value corresponding to the pulse signal; 分析处理单元，基于获取的所述数据信号中的所述脉冲信号，并根据获取得所述时间差估算值，以及系统预设的额定时间差估算值和相位差估算值之间的对应关系，确定所述脉冲信号的相位差估算值；The analysis and processing unit determines the estimated phase difference value of the pulse signal based on the pulse signal in the acquired data signal and according to the acquired estimated time difference value and the correspondence between the system preset estimated time difference value and the estimated phase difference value. 校正单元，用于对于所述数据信号的至少两路脉冲信号中，并对同一时间段内的对两路脉冲信号进行一致性校正，得到两路所述脉冲信号之间的时相校准系数，然后再通过所述时相校准系数对两路脉冲信号对应的时间差估算值和相位差估算值进行校正，分别得到时间差测量值和相位差测量值；The correction unit is used to perform consistency correction on at least two pulse signals of the data signal within the same time period to obtain the phase calibration coefficient between the two pulse signals, and then correct the estimated time difference and estimated phase difference of the two pulse signals through the phase calibration coefficient to obtain the measured time difference and measured phase difference respectively. 效验单元，用于对于所述数据信号的至少两路脉冲信号，根据所述两路脉冲信号对应的时间差测量值和相位差测量值进行联合测向处理运算，对校准时间数据给定判断。The verification unit is used to perform joint direction finding processing calculations on at least two pulse signals of the data signal based on the time difference measurement value and phase difference measurement value corresponding to the two pulse signals, and to make a judgment on the calibration time data. 2.根据权利要求1所述的一种基于插值计算的高精度时差测量系统，其特征在于，所述数据信号至少包括两路脉冲信号中的每两路脉冲信号。2. The high-precision time difference measurement system based on interpolation calculation according to claim 1, wherein the data signal includes at least two pulse signals from two pulse signals. 3.根据权利要求1所述的一种基于插值计算的高精度时差测量系统，其特征在于，所述时间差估算值计算公式如下：3. The high-precision time difference measurement system based on interpolation calculation according to claim 1, characterized in that the formula for calculating the estimated time difference is as follows: 其中，τ表示时间差估算值，P表示F(m)的谱线峰值，i表示F(m)区间插值的个数，F(m)表示离散傅里叶变换运算。Where τ represents the estimated time difference, P represents the peak value of the spectral line of F (m) , i represents the number of interval interpolations of F (m) , and F (m) represents the discrete Fourier transform operation. 4.根据权利要求1所述的一种基于插值计算的高精度时差测量系统，其特征在于，所述时间差估算值处理，基于对于所述数字信号类型的至少两路脉冲信号中的每两路脉冲信号，根据所述两路脉冲信号对应的时间差测量值，利用曲面拟合算法对所述时间差测量值进行插值运算，得到多个差值点，并根据多个所述差值点确定一个开口向上的二次曲面，基于所述二次曲面，得到时间差测量值组，公式如下：4. A high-precision time difference measurement system based on interpolation calculation according to claim 1, characterized in that the time difference estimation processing is based on, for each pair of at least two pulse signals of the digital signal type, according to the time difference measurement value corresponding to the two pulse signals, using a surface fitting algorithm to perform interpolation calculation on the time difference measurement value to obtain multiple difference points, and determining an upward-opening quadratic surface based on the multiple difference points, and obtaining a set of time difference measurement values based on the quadratic surface, as shown in the following formula: 其中，为相位差理论值与所述相位差测量值之间的误差，Δτ为时间差理论值与所述时间差测量值之间的误差；in, Δτ is the error between the theoretical value of the phase difference and the measured value of the phase difference, and Δτ is the error between the theoretical value of the time difference and the measured value of the time difference. 基于上述公式，确定确定多个所述插值点的相位差测量值组，公式如下：Based on the above formula, a set of phase difference measurements for multiple interpolation points is determined, as follows: 其中，γ(θ)表示相似度函数，表示相位差测量值，表示第i个插值对应的相位差理论值，i表示插值个数。Where γ(θ) represents the similarity function, This represents the phase difference measurement value. This represents the theoretical phase difference value corresponding to the i-th interpolation, where i represents the number of interpolations. 5.根据权利要求4所述的一种基于插值计算的高精度时差测量系统，其特征在于，基于获取的所述相位差测量值组以及所述时间差测量值组进行计算获取确定模糊值k，公式如下：5. A high-precision time difference measurement system based on interpolation calculation according to claim 4, characterized in that, based on the acquired phase difference measurement value group and the time difference measurement value group, a fuzzy value k is calculated and determined, as follows: 其中，θ表示测向角度值，表示相位差测量值，d表示两个分布式天线阵元之间的距离，λ表示所述脉冲信号的波长，arccos表示反余弦运算。Where θ represents the direction finding angle, represents the phase difference measurement, d represents the distance between the two distributed antenna elements, λ represents the wavelength of the pulse signal, and arccos represents the inverse cosine operation. 6.根据权利要求5所述的一种基于插值计算的高精度时差测量系统，其特征在于，两个所述分布式天线阵元之间的间距，基于获取的所述差测量值和所述相位差测量值代入系统预设的额定值域角度对照表内以获取测向角度。6. A high-precision time difference measurement system based on interpolation calculation according to claim 5, characterized in that the distance between the two distributed antenna array elements is obtained by substituting the obtained difference measurement value and the phase difference measurement value into a preset rated value range angle lookup table of the system to obtain the direction finding angle. 7.根据权利要求1所述的一种基于插值计算的高精度时差测量系统，其特征在于，所述相位差估算值，基于获取的每两路所述脉冲信号，对两路所述脉冲信号进行FFT变换，得到变换后的两路所述脉冲信号，然后在频域上对两路所述脉冲信号进行共轭相乘。7. A high-precision time difference measurement system based on interpolation calculation according to claim 1, characterized in that the phase difference estimation value is based on the acquired two pulse signals, the two pulse signals are subjected to FFT transformation to obtain the transformed two pulse signals, and then the two pulse signals are multiplied by conjugate in the frequency domain. 8.一种电子设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其特征在于，所述处理器执行所述程序时实现权利要求1至7任一项所述基于插值计算的高精度时差测量系统的步骤。8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the program, it implements the steps of the high-precision time difference measurement system based on interpolation calculation as described in any one of claims 1 to 7. 9.一种计算机可读存储介质，其上存储有计算机程序，其特征在于，该计算机程序被处理器执行时实现权利要求1至7任一项所述基于插值计算的高精度时差测量系统的步骤。9. A computer-readable storage medium having a computer program stored thereon, characterized in that, when executed by a processor, the computer program implements the steps of the high-precision time difference measurement system based on interpolation calculation as described in any one of claims 1 to 7.
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