128 results about "Clock offset" patented technology

The invention discloses a cross-device clock correction method supporting accurate synchronization of meters, and aims to improve the data time consistency among multiple meter devices and meet the requirements of high-precision electric power measurement and event analysis. The method comprises the following steps: acquiring a network time protocol timestamp and a first sampling time sequence in a reference meter, generating a clock reference signal, and broadcasting the clock reference signal to a corrected meter; comparing the corrected meter with a local second sampling time sequence, and calculating a clock skew coarse value vector; further performing wavelet decomposition on the offset coarse value, extracting to form a drift feature vector, fusing the drift feature vector with a historical template, and calculating a unified correction parameter set by using a Bayesian recursion method; and generating a correction pulse sequence carrying a delay residual compensation code based on the parameter set, sending the correction pulse sequence to a corrected meter, calling an interpolation compensation function to construct a piecewise polynomial drift compensation table, and finally realizing dynamic correction and cross-device accurate synchronization of a local real-time clock.

The invention discloses a power distribution network distributed measurement synchronization method and device based on Beidou satellite time service, and belongs to the technical field of power distribution network measurement, and the method comprises the steps: obtaining a Beidou satellite signal, calibrating a local clock source, and generating a standard time reference; when it is continuously monitored that the Beidou satellite signal quality parameter is lower than a quality threshold value, clock working environment parameters of a local clock source are collected, and a short-term clock offset predicted value is generated in combination with a standard time reference; generating topology correction according to the topology connection relation of the power distribution network; and fusing the short-term clock offset predicted value and the topology correction quantity to generate a dynamic compensation time reference, performing time marking on the acquired electrical quantity measurement data of the power distribution network, and generating synchronous measurement data with a timestamp. According to the technical scheme, when the Beidou signal is lost, the local clock drift predicted value and the adjacent node topology correction amount are fused to generate the dynamic compensation time reference, so that the measurement data synchronization precision and robustness of the power distribution network in a complex environment can be remarkably improved.

The invention discloses a behavior-driven twinborn prediction method, and relates to the technical field of intelligent information processing and prediction modeling, and the method comprises the following steps: building a unified event time baseline, collecting nanosecond clock offset information of each data source, building a cross time sequence suspicion chart, recognizing time synchronization abnormal nodes, and forming a credible time anchor point set; and based on the trusted time anchor point set, executing anti-fact playback, reconstructing a historical evolution process of behavior data, generating a time offset vector set, and constructing a corresponding time sequence offset spectrum. According to the method, through construction of a unified time baseline, trusted anchor points, anti-fact replay, causal topology and time reversal control, time sequence dislocation identification, calibration and false trajectory elimination of multi-source behavior data are realized, a dynamic self-healing closed-loop prediction mechanism is established, and the twin system prediction accuracy and stability are improved.

The invention provides a real-time synchronous control method and system based on an EtherMAC bus, and the method comprises the steps: obtaining an original transmission frame sequence in a bus transmission channel through a monitoring unit; calculating a path topology priority factor and a clock offset compensation value according to a preset topological structure rule; obtaining a to-be-transmitted data frame sequence based on a calculation result, and adjusting a phase synchronization pulse in the monitoring unit to obtain an adjusted phase synchronization pulse; performing redundancy check on the to-be-transmitted data frame sequence to generate a check state code; when the value reaches a preset error threshold value, extracting a to-be-marked frame from the to-be-transmitted data frame sequence, and generating a synchronization signal set containing a high-reliability identifier; generating a real-time synchronization control instruction for driving the execution terminal based on the phase synchronization pulse and the adjusted phase synchronization pulse; according to the technical scheme provided by the invention, real-time monitoring, frame reconstruction and clock synchronization adjustment of data transmission are realized, and high-precision synchronization response of terminal control is improved.

The invention discloses a high-resolution peak value positioning method based on multi-pulse superposition and offset clock cooperation, and belongs to the technical field of laser radar ranging. Aiming at the problems that a traditional laser radar depends on a high-sampling-rate ADC, so that hardware cost is high, power consumption is large, and sampling errors are likely to be caused by echo jitter, the method does not need to replace an existing ADC, and the technical breakthrough is achieved through the following core steps that firstly, the basic sampling rate X Hz and the target equivalent sampling rate improvement multiple N of the ADC are determined; laser pulses are emitted to a target object for N times, during Kth emission, ADC sampling is started by delaying (K-1) / (X * N) seconds, and N groups of echo data with time sequence offset are obtained; performing cross combination on the N groups of data, and constructing an N-time equivalent high-sampling-rate data sequence; repeating the sampling and combining process for S times, and performing alignment superposition and averaging on S groups of data to suppress echo jitter and noise; and estimating initial parameters (amplitude, mean value and standard deviation) of a Gaussian model based on the superposed data, optimizing the parameters through an LM nonlinear optimization algorithm, and finally taking the optimized mean value as a high-precision peak position of an echo signal to realize accurate measurement of the laser flight time. Under the condition of low-sampling-rate hardware, through the collaborative design of clock skew and multi-pulse superposition, the physical limitation of the sampling rate is broken through, low cost, low power consumption and high ranging precision are taken into account, and the method is adaptive to multi-scene application of automatic driving, industrial ranging and the like.

Disclosed are techniques for wireless communication. In an aspect, an initiator device may transmit a ranging initiation message and a ranging final message to a plurality of responder devices. The initiator device may determine a target relative clock offset between a target responder device of a first subset of the plurality of responder devices and the initiator device based on one or more reference responder devices of a second subset of the plurality of responder devices, the first subset of the plurality of responder devices having successful reception of either the ranging initiation message or the ranging final message, and the second subset of the plurality of responder devices having successful reception of the ranging initiation message and the ranging final message. The initiator device may determine a time of flight based on one or more time of flight measurements and the target relative clock offset.

The invention relates to the technical field of digital audio signal processing, and discloses an audio synchronization multipoint PTS correction method and system, a storage medium and a device, and the method comprises the steps: setting PTS calibration points at a plurality of key nodes on an audio processing link of a master device and a slave device, and carrying out the systematic initialization of an initial PTS value of each calibration point; a clock synchronization mechanism between the master device and the slave device is established, and dynamic calibration of a slave device clock is achieved by periodically interacting time synchronization signals and calculating clock offset; performing multi-stage dynamic adjustment and compensation on the PTS value of the corresponding calibration point according to the network transmission delay fluctuation of the audio frame and the received actual coding duration and time deviation; the filling state and the PTS deviation value of the playing buffer area are monitored in real time, audio output synchronization between the master device and the slave device is maintained through a playing speed fine tuning strategy, optimization is carried out aiming at a lossy coding scene, and the limitation of a traditional single-point synchronization method is effectively solved.

The invention discloses a bridge expansion joint acoustic monitoring method based on a beam forming microphone array, and the method comprises the steps: synchronously collecting acoustic signals through multiple channels, and achieving the high-precision signal alignment through clock offset compensation; the noise analysis module is started by combining a pre-triggering signal of a vehicle passing through the detection unit, the optimal microphone distance is dynamically determined according to sound field coherence and a signal-to-noise ratio maximization model, and a stepping motor drives a movable microphone to achieve real-time adjustment. On the basis, a spatial filtering weight is generated by adopting a self-adaptive beam forming algorithm, and directional enhancement and interference suppression of the expansion joint sound source are realized. Through collaborative optimization of a hardware structure and a signal processing method, the sensitivity and accuracy of acoustic monitoring of the bridge expansion joint are effectively improved, the abnormal sound source recognition capability can be remarkably enhanced, the environmental noise interference is reduced, and the method is suitable for intelligent monitoring and diagnosis of the long-term service state of the bridge expansion joint.

The invention discloses an urban trunk network-oriented reconfigurable quantum communication route synchronization system, which relates to the technical field of quantum communication and comprises a quantum channel state sensing module, a clock offset prediction and registration module, a reconfigurable route planning engine, an entangled state registration and regulation module, a synchronization instruction scheduling module and an optimization module. According to the system, de-coherence time, entanglement fidelity and synchronous offset risk of a quantum link are sensed in real time, a quantum link feasibility scoring graph is generated in combination with a graph neural network, and an optimal entanglement forwarding path is output according to the quantum link feasibility scoring graph; meanwhile, the width and rhythm of a transmission window are dynamically adjusted based on task priorities and network loads, and cross-node high-precision synchronization and resource coordination are achieved; a routing and synchronization strategy can be continuously optimized by introducing a communication performance evaluation model and a feedback learning mechanism; according to the invention, the stability of the quantum communication system in a complex urban network environment is significantly improved.

The invention discloses a frequency standard remote calibration method and system based on an NTP protocol. The method comprises the following steps: S1, an NTP protocol server reads a first frequency standard signal meeting a precision requirement as a reference frequency signal and initializes local time; the calibration device reads a calibrated second frequency standard signal as a reference frequency signal, counts time according to a second frequency nominal value and completes initialization; s2, the calibration equipment performs message transmission with a server through an NTP protocol transceiving module, records transceiving timestamps, calculates clock skew and adjusts local time to complete synchronization; s3, the calibration device repeatedly transmits the message according to a preset period, calculates clock skew and network round-trip delay round by round, and obtains a multi-tuple sample; and S4, removing abnormal samples by network round-trip delay, performing linear fitting on reserved samples, and taking a negative value of a fitting slope as a relative frequency deviation of a second frequency standard. According to the invention, remote calibration of the frequency standard is carried out by using the NTP, and compared with satellite and optical fiber remote calibration technologies, the cost required by calibration can be greatly reduced.

The invention provides a chip time sequence analysis method and device, and the method comprises the steps: determining the second data path time delay between the corresponding ports of interconnected modules according to the first data path time delay of the corresponding port of each module and the interconnection relation information between the modules under the condition that a plurality of modules are in a target stable state, the interconnection module comprises two modules which are directly connected in the modules; and determining convergence information of the top time sequence of the interconnection modules according to the clock period, the trigger establishment time, the clock uncertainty, the clock skew between the interconnection modules and the second data path time delay. According to the method and the device, the time sequence between the interconnected modules can be quickly analyzed before the top-layer time sequence analysis is executed, and the time sequence analysis efficiency of the top layer of the chip is improved without waiting for all the modules to complete a physical implementation process.

The invention discloses a time sequence synchronization method and system for data fusion of a multi-modal wearable sensor, a terminal and a storage medium. The method comprises the following steps: acquiring an absolute timestamp as a global clock source; taking the global clock source as a master clock of a precision time protocol, configuring the plurality of wearable sensors as slave clocks, and executing multiple rounds of message interaction between the master clock and the slave clocks through the precision time protocol to obtain a timestamp corresponding to each round of interaction; and calculating the current path time delay and the current clock offset according to the corresponding timestamps, carrying out iterative judgment on the current path time delay and the current clock offset according to a preset path time delay threshold value and a preset clock offset threshold value, and determining whether to correct the local clock according to the current clock offset according to an iterative judgment result. The slave clock and the global clock source achieve time sequence synchronization; and after time synchronization is achieved, phase alignment is carried out on the periodic data sampling tasks of the multiple wearable sensors. According to the invention, the time sequence synchronization precision is obviously improved.

The invention provides a multi-terminal clock synchronization method, system and device and a medium, and relates to the technical field of wireless communication, and the method comprises the following steps: a master device sends a synchronization request packet to an ith slave device at a first sending moment; the ith slave device receives the synchronization request packet at the first receiving moment and sends a synchronization response packet to the master device at the second sending moment; the master device receives a synchronization response packet at a second receiving moment, and determines a first receiving moment and a second sending moment according to the synchronization response packet; determining a transmission delay parameter and a clock offset parameter according to the first sending moment, the second sending moment, the first receiving moment and the second receiving moment, and sending the transmission delay parameter and the clock offset parameter to the ith slave device; and the ith slave device adjusts a local timer according to the transmission delay parameter and the clock offset parameter, so that clock synchronization between the ith slave device and the master device is realized. According to the invention, high-precision clock synchronization between multiple slave devices and the master device is realized.

The invention provides a time synchronization method executed by slave equipment, and the method comprises the steps: receiving a time synchronization packet from master equipment, and obtaining the packet transmitting time of the master equipment and the packet receiving time of the slave equipment; calculating a clock offset value between the slave device and the master device based on the packet transmitting time of the master device, the packet receiving time of the slave device and the path delay calibration value, and correcting a local clock of the slave device; wherein the path time delay calibration value is related to the distance between the master device and the slave device. The method can correct the clock skew between the master device and the slave device in real time, and improves the time synchronization precision.

The invention relates to the technical field of power system monitoring, in particular to an electricity stealing identification method and system based on multi-source data, electronic equipment and a medium. The method comprises the following steps: acquiring a running data stream and a local timestamp to obtain a plurality of groups of time sequence data sets; extracting an electrical quantity sudden change event or a non-commanding switch action event in each group of time sequence data set; constructing a multi-constraint model based on the topological connection relationship of the power line, the Kirchhoff's law and the energy conservation law; iteratively calculating the clock offset of each monitoring device relative to the system logic time; and inversely solving node current unbalance and loop power unbalance so as to output a judgment result of an electricity stealing event. Through the mode, the technical problem of cyclic dependence between event causal inference and timestamp calibration under the condition of multi-source asynchronous monitoring data in the prior art is solved, and the reliability, the accuracy and the automation level of electricity stealing behavior analysis are improved.

The invention provides a base station clock information synchronization method and system based on artificial intelligence and related equipment, and relates to the technical field of communication. The method comprises the following steps: acquiring clock state data and / or network performance data of each operator base station in a first time period; fusing the clock state data and / or network performance data of each operator base station in the first time period, and constructing a cross-operator base station clock synchronization feature matrix; the cross-operator base station clock synchronization feature matrix is input into a pre-trained clock skew prediction model, base station clock skew trend information of each operator base station in a second time period is output, and the second time period is a time period after the first time period; and according to the base station clock offset trend information of each operator base station in the second time period, executing a clock information synchronization operation on each operator base station. According to the invention, the service quality of the co-construction and sharing network can be effectively improved, and the reduction of service experience caused by asynchronous base station clocks is reduced.

The invention discloses a time sequence optimization method of a clock tree and a computer readable storage medium, and relates to the technical field of clock tree synthesis and time sequence optimization. The method comprises the steps that a to-be-processed time sequence path is obtained, time sequence optimization is conducted on the to-be-processed time sequence path from the to-be-processed time sequence path, and time sequence optimization comprises the steps that a register with the minimum time sequence margin is determined as a to-be-processed register; determining a target fan-in end timing margin according to the plurality of fan-in end timing margins of the to-be-processed register; and / or determining a target fan-out end timing margin according to the plurality of fan-out end timing margins of the register to be processed; calculating a clock offset according to the target fan-in end timing margin and / or the target fan-out end timing margin; adjusting the time sequence margin of each fan-in end of the register to be processed and / or the time sequence margin of each fan-out end of the register to be processed according to the clock offset; and updating the to-be-processed time sequence path until a set ending condition is met.

A method for determining a state parameter of a global navigation satellite system receiver and an apparatus, in particular its absolute position, determining being based on—a measured information including a pseudorange, a carrier phase and / or a Doppler frequency measurement, —broadcast information on the satellite orbits and clock offsets, and—high accuracy correction information of a satellite positions, clock offsets, code and / or phase biases, the method comprising: —determining a satellite position estimate and a clock offset estimate based on the broadcast information, —determining a corrected satellite position and a corrected clock offset based on the satellite position estimate and the clock offset estimate by using the high accuracy information, in particular the high accuracy correction information of the satellite position and the clock offset.

The invention discloses a sensor network time synchronization method, which comprises the following steps: firstly, clustering and networking sensor nodes according to equipment to which the sensor nodes belong, and for clusters, fusing clock frequency offset between a quantized master control clock signal and a cluster head node into an improved TPSN protocol to dynamically calibrate a logic clock of the cluster head node; and for the interior of the cluster, calibrating the logic clock of the child node in the cluster based on the clock drift amount and the clock offset amount of the cluster head node and the child node in the cluster. According to the method, the characteristics of a power equipment monitoring scene are combined, and a dynamic hierarchical adjustment mechanism and a bidirectional calibration strategy are introduced, so that the time-varying influence of frequency deviation on the synchronization error can be remarkably suppressed, and the adaptability to network topology change is improved.

The present invention discloses an improved method for wireless clock synchronization and positioning solution of UWB indoor positioning. First, a master base station establishes a communication connection with a slave base station and periodically sends timestamp information to each other to achieve clock synchronization between the base stations. After the clock synchronization process is completed, the tag broadcasts the timestamp information. The slave base station saves the received timestamp information and sends the timestamp information and the timestamp during the clock synchronization process to the tag. The tag sends the timestamp information during the positioning process to a host computer. The host computer calculates clock drift and clock offset by using the clock synchronization information, performs clock synchronization on the slave base stations, synchronizes the timestamps of tag messages received from each slave base station to the clock axis of the master base station, and obtains arrival time difference information of the tag. The arrival time difference information is introduced into the Chan-Taylor algorithm to solve the coordinates of the tag. If the positioning result diverges, the coordinate estimation value is re-determined by using a coordinate solution compensation method, and secondary positioning is performed, thereby effectively improving the indoor positioning accuracy of UWB.

The application provides a substation-oriented anchor point timestamp calibration method and related device, which is applied to a collection terminal in a substation monitoring system, the substation monitoring system further comprises a master clock and a sensor in communication connection with the collection terminal, and the method comprises the following steps: determining a drift parameter of a local crystal oscillator of the collection terminal according to a clock offset sequence between the collection terminal and the master clock in a plurality of continuous synchronization periods; correcting a sampling counter in the collection terminal by using the drift parameter; if a transient partial discharge signal is detected according to a data frame sequence collected by the sensor on a target metal pipeline in the substation, a dynamic anchor point is established at a triggering moment of the transient partial discharge signal; and based on the dynamic anchor point, the generated sampling count sequence after correction and a time reference of the collection terminal, a data frame related to the transient partial discharge signal in the data frame sequence is timestamped. The accuracy of timestamping is improved.

The application discloses a power distribution network distributed measurement synchronization method and device based on Beidou satellite timing, and belongs to the technical field of power distribution network measurement, which comprises the following steps: acquiring Beidou satellite signals to calibrate local clock sources and generate a standard time reference; when continuously monitoring the quality parameter of the Beidou satellite signals is lower than a quality threshold, collecting clock working environment parameters of the local clock sources and combining the standard time reference to generate a short-term clock offset prediction value; generating a topological correction amount according to the topological connection relationship of the power distribution network; and fusing the short-term clock offset prediction value and the topological correction amount to generate a dynamic compensation time reference, time marking the collected electrical quantity measurement data of the power distribution network, and generating time-stamped synchronous measurement data. The technical scheme of fusing the local clock drift prediction value and the adjacent node topological correction amount to generate the dynamic compensation time reference when the Beidou signal is lost can significantly improve the precision and robustness of the measurement data synchronization of the power distribution network in a complex environment.

Aspects discussed herein include a method and associated network device and computer program product. The method includes receiving a network packet and estimating a power profile corresponding to a plurality of subcarriers of a channel using a preamble of the network packet. The method also includes estimating a carrier frequency offset using the power profile and estimating a clock offset using the carrier frequency offset.

The present invention discloses a high-precision cascade inverter synchronous control method, comprising: using a main controller to periodically send fundamental wave data and control instructions to a cascade module controller; using the cascade module controller to receive the fundamental wave data and control instructions, and using a synchronization detection unit provided therein to record a serial communication signal at a sampling frequency that is a multiple of the communication baud rate, and determining a clock offset based on the time interval between two adjacent level changes in the serial communication signal; using a synchronization counting unit provided in the cascade module controller to correct a synchronization counting unit counter based on the clock offset; adjusting a carrier counting unit counter based on the corrected synchronization counting unit counter; comparing the adjusted carrier counting unit counter with the fundamental wave data to generate a switching signal for a power device, thereby achieving synchronous control of the cascade inverter. The present invention can achieve relatively high precision and stability, and the synchronization level can be selected based on cost and demand.

A low complexity clock drift estimation scheme for UWB-MMS ranging is presented that assumes that a sampling frequency offset (SFO) and a carrier frequency offset (CFO) are driven from the same clock source. The SFO is first estimated with a plurality of CIR segments, and the SFO is used to compensate for the CFO of the CIR segments. A fine CFO estimate is then obtained from the compensated CIR. Combining the coarse SFO and fine CFO estimates to resample and phase rotate the original CIR can significantly improve the performance of the CIR combination, thereby improving the performance of ranging.

This invention relates to a method for optimizing synchronization accuracy in end-to-end transmission mode clock synchronization systems. First, the master and slave nodes within the clock synchronization system exchange PTP messages in end-to-end transmission mode according to the IEEE 1588 Precision Clock Protocol. The slave node obtains the timestamps and transmission delays recorded in each PTP message. Then, the slave node uses a filtering algorithm to process the forward and reverse transmission delays. Combining this with the clock offset calculation formula in the IEEE 1588 Precision Clock Protocol, the clock offset between the slave node and the master clock is calculated using the timestamps in the PTP messages and the processed transmission delays. Finally, the calculated clock offset is used to adjust the local clock. This invention solves the problem of asymmetric delays during message transmission affecting the clock synchronization accuracy between the master and slave nodes in end-to-end transmission mode clock synchronization systems, improving the time synchronization accuracy between devices in network communication systems and having broad application prospects.

The present disclosure provides an artificial intelligence-based base station clock information synchronization method and system and related equipment, relating to the field of communication technology. The method comprises: collecting clock state data and / or network performance data of each operator base station in a first time period; fusing the clock state data and / or network performance data of each operator base station in the first time period to construct a cross-operator base station clock synchronization feature matrix; inputting the cross-operator base station clock synchronization feature matrix into a pre-trained clock offset prediction model to output base station clock offset trend information of each operator base station in a second time period, the second time period being a time period occurring after the first time period; and performing a clock information synchronization operation on each operator base station according to the base station clock offset trend information of each operator base station in the second time period. The present disclosure can effectively improve the service quality of the co-construction and sharing network and reduce the decline in service experience caused by the unsynchronized base station clocks.

The application discloses a kind of multi-modal wearable sensor data fusion-oriented timing synchronization method, system, terminal and storage medium, the method includes: obtaining absolute timestamp as global clock source;Global clock source is as the master clock of precision time protocol, a plurality of wearable sensors are configured as slave clock, through precision time protocol, multiple rounds of message interaction are performed between master clock and slave clock, and the timestamp corresponding to each round of interaction is obtained;According to the corresponding timestamp, the current path delay and the current clock offset are calculated, and according to the preset path delay threshold and clock offset threshold, the current path delay and the current clock offset are iteratively judged, whether the local clock is corrected according to the current clock offset is determined according to the iterative judgment result, until slave clock and global clock source achieve timing synchronization;After achieving time synchronization, the periodic data sampling tasks of a plurality of wearable sensors are phase-aligned.The application significantly improves timing synchronization accuracy.

The invention relates to the technical field of clock synchronization, in particular to a clock synchronization method based on a self-adaptive dynamic adjustment Kalman filter, which comprises the following steps of: defining a state vector containing clock skew and drift by adopting a second-order clock model, constructing a state transition and observation model, and calculating the state of the state transition and observation model; adaptively estimating a noise covariance based on a historical residual sliding window; measuring and predicting residual errors are recorded in each round of filtering, and the prediction residual errors are quantized; the residual error is stored in a sliding window, sample variance is calculated to obtain noise covariance initial estimation, and meanwhile, a simplified model of the proportional relation between clock skew and drift noise covariance is assumed; according to a covariance matching principle, using maximum likelihood estimation to calculate observation and process noise covariance from a sliding window residual error, that is, measuring a residual error square mean value as an observation noise covariance, presenting the process noise covariance in a matrix form, and accurately estimating noise characteristics; and performing exponential weighted moving average updating on the noise covariance by using a smoothing factor, performing Kalman filtering prediction and updating iteration to obtain clock skew and drifting optimal estimation, correcting a local clock according to the clock skew and drifting optimal estimation, and performing loop iteration to realize high-precision clock synchronization. According to the method, the noise covariance can be estimated and adjusted in real time, higher synchronization precision, higher convergence speed and higher robustness can be realized in a complex environment, and the problem that high-precision and stable clock synchronization is difficult to guarantee in a non-stable and high-dynamic wireless environment by the existing method is solved.

The embodiment of the invention discloses a GNSS receiver clock modeling method based on power-law noise, and relates to the technical field of satellite navigation positioning, and the method comprises the steps: obtaining phase difference data between a local clock and a reference clock, and obtaining a diffusion coefficient of clock noise through extraction based on the phase difference data; establishing a clock state space equation containing a clock offset parameter and a frequency offset parameter, and calculating a process noise covariance matrix of the clock state space equation based on the diffusion coefficient; and embedding the two-dimensional clock random state model and the process noise covariance matrix into a process noise embedding filtering estimation algorithm, and calculating to obtain a clock offset parameter, a frequency offset parameter and a three-dimensional coordinate parameter of the receiver. According to the method, estimation noise of receiver frequency deviation can be remarkably suppressed, and the short-term stability of the elevation direction in GNSS dynamic positioning is effectively improved. The method and the device are suitable for the GNSS terminal adopting a low-cost clock so as to realize high-precision time synchronization and positioning.