226 results about "Timing error" patented technology

The invention provides a software ecological migration method and system based on intelligent analysis. Wherein a compatibility evaluation database is deployed in a target architecture, an instruction set mapping rule is preset, and migration risk data is generated through semantic verification; dynamically allocating resources through a heterogeneous virtualization scheduling engine, calling a hardware acceleration unit translation defect instruction, and generating virtualization equipment simulation parameters based on the migration risk data; deploying protocol conversion middleware, dynamically analyzing and reconstructing a network protocol data packet, and combining instruction execution delay data to adjust analysis granularity; in cross-architecture transmission, instruction conversion defects are injected into control logic, timing sequence errors are corrected through clock offset compensation, and corrected data are transmitted back to update instruction mapping rules. According to the technical scheme provided by the invention, the data leakage risk is reduced, and zero shutdown in the migration process is ensured.

The invention relates to the technical field of time synchronization, and discloses a hybrid time service method based on Beidou satellite navigation and a TSN, which comprises the following steps: acquiring network topology structure information and historical time service error data of each synchronization node in a target distributed system, and constructing a dynamic time delay state set for jitter identification; based on the dynamic time delay state set, a current global time reference is extracted through a time calibration algorithm, a time difference reference vector sequence is generated, and initial synchronization adjustment is carried out on the TSN main node; constructing an inter-node clock convergence function curve according to the slave node response stability, and judging whether the synchronous network is in a low jitter interval or not based on the time offset rate and the time drift trend change; in combination with the node time state after directional offset suppression, a multi-channel redundant time synchronization mechanism in a time window is applied, a weight adjustment coefficient is extracted, and an unbalanced calibration factor is introduced; and according to a regression correction result, evaluating a time service stability index in real time. The method has the advantage of improving the time service stability.

The invention relates to a retiming circuit applied to an ultra-high-speed and high-precision DAC (Digital-to-Analog Converter), which comprises an alignment module, a cross point adjusting module, a coding module, a phase detection module and a digital module, the coding module is connected with the alignment module, the phase detection module is connected with the cross point adjusting module and the coding module, and the digital module is connected with the phase detection module and the alignment module. According to the circuit structure provided by the invention, the sampling clock can be accurately aligned to the center of a data eye pattern, so that the delay difference between a clock tree and a data path caused by process deviation and the like is effectively reduced, the high-frequency spurious suppression performance is improved by eliminating nonlinear distortion caused by time sequence errors, the SFDR is greatly improved, and compared with a traditional scheme, the SNR is effectively improved.

Embodiments of the present invention provide a method and an IAB node for achieving timing alignment in an IAB network system. The method includes receiving, by the IAB node, at least one resource configuration and at least one parameter, wherein the at least one parameter comprises timing advance, timing advance offset, and timing error. The IAB node then determines timing for operation based on the received parameters. The timing may include UL transmission timing at a MT of the IAB node, DL transmission timing at a DU of the IAB node, and UL reception timing at the DU of the IAB node. Further, the IAB node performs an operation in at least one resource based on the resource configuration and the determined timing. This proposed invention ensures precise timing alignment for efficient communication within the IAB network system.

The invention provides an electric energy meter clock error calibration system and calibration method. The method comprises the steps of presetting a control time table of a high and low temperature box and at least two automatic trimming schemes; the upper computer adjusts the temperature of the high-low temperature box according to the control time table; switching the connected meter numbers through a clock signal relay, obtaining a daily timing error message of each meter number in each round of test, and analyzing to obtain PPM and S / D data; carrying out mean value calculation on all PPM and all S / D data obtained by each meter number in each round of test, and obtaining a clock error value comprising a PPM mean value and an S / D mean value; after each round of test is finished, according to a clock error value corresponding to the meter number, assembling to obtain an RTC trimming frame according to the selected automatic trimming scheme, and sending the RTC trimming frame; and verifying an RTC trimming result. According to the invention, full-automatic test trimming can be realized, and the efficiency and precision of test and calibration are significantly improved.

Methods and apparatuses provide a mechanism to account for timing errors of a wireless device (12) in positioning measurements. In one example, a wireless device (12) performs reference-signal transmissions or measurements and sends information to a network node (20) that is involved in positioning of the wireless device (12). The information indicates associations of the reference-signal transmissions or measurements with respective timing groups of the wireless device (12). Each timing group represents a related set of transmission or reception timing errors within the wireless device (12). Based on the information, the network node (20) accounts for the different timing-group associations when performing positioning calculations that are based on the reference-signal transmissions or measurements performed by the wireless device (12).

A retimer and a retiming method may employ dual path clock forwarding to drive a transmit clock generator. An illustrative integrated retimer circuit includes a sampling element configured to generate a digital receive signal by sampling an analog receive signal in accordance with a sampled signal; a timing error estimator configured to generate a timing error signal indicative of an estimated timing error of the sampled signal relative to the analog received signal; a clock recovery circuit configured to derive a sampled signal from the estimated timing error and a reference clock in part by determining the frequency signal; a transmitter configured to retransmit the digital reception signal according to a transmission clock; and a transmit clock generator configured to derive a transmit clock. The transmit clock generator operates based on each of: a reference clock; a frequency signal; and a phase error of the transmit clock with respect to the sampled signal.

The invention discloses a data sampling timing error evaluation method based on an evaluation model, relates to the technical field of timing error evaluation, and solves the problem that timing error evaluation is not accurate enough. Wherein the sampling module realizes undistorted receiving and clock signal frequency output of a clock signal through a CMOS clock input circuit, a third-order digital phase-locked loop circuit and a DSP digital signal processing chip, and a Fourier phase difference algorithm removes harmonic interference to solve a phase difference between the clock signal and an ideal clock signal; the clock signal feature recognition unit adopts a convolutional neural network to carry out iterative training on a training set of the timing error evaluation module to obtain an error evaluation module, the error evaluation module and the time migration algorithm module realize accurate calculation of a timing error value, and the timing error value calculation accuracy is greatly improved.

Integrated circuit transceivers having digital timing recovery loops with phase interpolation may incorporate dynamic loop gains to compensate for nonlinearities of the phase interpolation. An illustrative receiver circuit includes: a phase interpolator, a sampling element, a timing error estimator, and a feedback circuit. The phase interpolator provides a sampling signal by applying a phase shift to a clock signal in response to a phase control signal. The sampling element produces a digital receive signal by sampling an analog receive signal in accordance with the sampling signal. The timing error estimator produces a timing error signal indicating an estimated timing error of the sampling signal relative to the analog receive signal. The feedback circuit derives the phase control signal from the timing error signal using a scaling element configured to scale the estimated timing error by a scale factor that depends on the phase control signal.

The invention provides a multi-sensor domain controller dynamic management method and a domain controller system, and the method comprises the following steps: S1, taking an external Ethernet gateway as a main clock source, and carrying out the time service of an MCU module in a domain controller based on a GPTP protocol; s2, the MCU module serves as a secondary clock source, distributes synchronous clock signals to the SOC module and an external sensor and collects clock skew data in real time; s3, when the main clock source fails, automatically switching to an internal GNSS module and an IMU module as standby clock sources, and dynamically compensating a time sequence error based on historical clock skew data; s4, controlling a global time synchronization error to be less than 150 microseconds through hardware-level timestamp marking and a software-level error correction algorithm; and S5, based on the synchronized time sequence data, performing timestamp alignment and fusion on the heterogeneous data input by the multiple sensors. According to the invention, the problems of clock redundancy and insufficient error compensation in the prior art are solved.

The invention discloses a short burst SOQPSK carrier synchronization method based on an RPT-Net network. The short burst SOQPSK carrier synchronization method comprises the following steps: preprocessing a signal, and merging time domain data of the signal and quartic data into input data; a multi-level residual convolutional network is adopted to extract cross-symbol local phase features, fine phase changes in SOQPSK signals are captured through layer-by-layer stacked convolution operation, the gradient degradation problem of a deep network is relieved in combination with a residual connection mechanism, and the local characterization capacity for phase jump and frequency offset disturbance is enhanced; through a phase perception position coding module, the time domain signal is converted into a complex number form, an instantaneous phase is extracted, orthogonal basis coding is constructed to represent phase change, and deep fusion with position coding is carried out; a Transform coding layer is introduced, a multi-head self-attention mechanism is utilized to capture a long-distance symbol dependency relationship, global phase consistency constraint is optimized, long-term influence of frequency offset on signals is captured, and time sequence error propagation is effectively inhibited.

The invention relates to the technical field of time service safety, and provides a clock frequency drift algorithm monitoring sensing time service protection method and device terminal. According to the method, firstly, clock frequency signals meeting requirements are collected, and preprocessing such as discrete sampling, denoising and resampling is carried out; secondly, calculating and analyzing clock frequency drift features by using mean drift estimation and variance, and constructing feature vectors; and inputting the feature vector into a machine learning classifier trained by historical data, identifying abnormal frequency drift, and realizing perception of a time service error. When abnormity is detected, early warning information including a frequency value, a drift degree and time service error estimation is generated and sent to a monitoring terminal through a wireless communication module. And fusion and weight adjustment of monitoring data of a plurality of clock sources are also included, so that the accuracy of time service protection is improved. The device further comprises a power supply module and a shell, and the system is composed of a plurality of devices and a central monitoring server.

Various examples of the disclosure generally relate to timing error groups and timing error group reports of transmission timing errors, specifically uplink transmission timing errors of uplink positioning reference signals. Thereby, high-accuracy positioning of a wireless communication device is enabled.

The invention discloses a cable sensor network time service compensation method, device and equipment and a medium, and belongs to the technical field of network time service, and the method comprises the following steps: collecting process historical data of a cable network actual error compensation system, and taking error data of a satellite second clock and a crystal oscillator second clock as an initial sample; aggregating the initial samples to obtain aggregated samples under each step size scale; constructing an error feature vector containing an aggregation sample of the current scale and an accumulated error of the current time point information; performing modeling on the error feature vectors by using a Gaussian-like process regression model to obtain a Gaussian-like process regression model of each step size scale; error estimation values of all step size scales are generated in sequence, and a time service error estimation value of the current moment is obtained by combining the difference error estimation values of the lowest step size scale and the highest step size scale; and compensating the accumulated error of the crystal oscillator clock based on the time service error estimation value at the current moment. According to the invention, the synchronization precision and practicability are improved.

Disclosed are techniques for wireless positioning. In an aspect, a first network node receives a measurement request from a location server, the measurement request requesting the first network node to measure a positioning reference signal (PRS) resource from at least one second network node using a plurality of receive timing error groups (Rx TEGs) of the first network node, and transmits a measurement report to the location server, the measurement report including a plurality of positioning measurements based on the PRS resource, the plurality of positioning measurements corresponding to the plurality of Rx TEGs.

Retimers and retiming methods may employ dual path clock forwarding to drive a transmit clock generator. One illustrative integrate retimer circuit includes: a sampling element configured to produce a digital receive signal by sampling an analog receive signal in accordance with a sampling signal; a timing error estimator configured to produce a timing error signal indicating an estimated timing error of the sampling signal relative to the analog receive signal; a clock recovery circuit configured to derive the sampling signal from the estimated timing error and a reference clock in part by determining a frequency signal; a transmitter configured to retransmit the digital receive signal in accordance with a transmit clock; and a transmit clock generator configured to derive the transmit clock. The transmit clock generator operates based on each of: the reference clock; the frequency signal; and a phase error of the transmit clock relative to the sampling signal.

A calibration circuit for correcting timing errors introduced by a DAC in a signal path of an ADC, the calibration circuit comprising: an input subtraction module configured to subtract an estimated error from an output of the ADC and provide a corrected output; a filter module configured to approximate an error transfer function corresponding to the DAC timing errors; a correlation module configured to correlate the corrected output with an output from the filter module to extract an error term; an integrator module configured to integrate the error term to provide an updated error coefficient; and a correction module configured to correlate the updated error coefficient with the output from the filter module to provide the estimated error to the input subtraction module.

The invention provides a non-cooperative measurement and control signal carrier recovery method and device based on pseudo code jump edge detection, and belongs to the technical field of radar signal processing, and the specific process is as follows: setting the stepping amount of a local timing synchronization pulse accumulator, and when the accumulated value of the timing synchronization pulse accumulator is greater than a set threshold value, stopping the stepping amount of the local timing synchronization pulse accumulator; the accumulator outputs a timing synchronization pulse signal; controlling a sliding accumulator by using a synchronization pulse signal to perform sliding accumulation on a constellation module value # imgabs2 # calculated by the # imgabs0 # baseband signal and the # imgabs1 # baseband signal, and further obtaining a synchronization pulse capture offset for coarse synchronization of a timing synchronization pulse; obtaining a correlation value of a # imgabs3 path baseband signal and a # imgabs4 path baseband signal under the control of a timing synchronization pulse after coarse synchronization, obtaining a timing error by using a timing error discriminator, and further obtaining a stepping amount of a synchronization pulse accumulator; and realizing carrier recovery by using the stepping amount of the synchronization pulse accumulator.

The invention discloses a chirp signal-based timing synchronization system and method, belongs to the field of wireless communication, and can be used for large-scale timing drift compensation in a low-noise scene. The system comprises a timing error detection module, a numerical control oscillator module and an interpolation filter module which are cascaded, the timing error detection module is used for removing chirp single-tone spectrum peak positioning and timing errors, and the numerical control oscillator module is used for mapping the timing errors to stepping factors, updating phase register values and determining integer and decimal interpolation sampling points; the interpolation filter module resamples the chirp symbols by using interpolation sampling points to realize timing synchronization; the method comprises the steps of firstly initializing parameters, then calculating a timing error value of an upper chirp leading signal through a timing error detection module, then calculating a resampling parameter through a numerical control oscillator, and finally obtaining a timing synchronization result after the upper chirp signal is resampled through an interpolation filter module. According to the invention, the timing synchronization anti-noise performance and the estimation precision of the timing error value are improved.

Systems, methods, apparatuses, and computer program products for TEG reporting with angular validity indication. One method may include a UE calculating an angular validity region around a reference direction for which at least one timing error group is valid, and transmitting at least one of the timing error groups comprising an indication about the angular validity region and a reference direction identifier associated with the reference direction to a location management node.

Systems and methods implement Data-Over-Cable Service Interface Specification (DOCSIS) time protocol (DTP) calibration. A testing laboratory measures a DTP timing error for a test configuration representative of a DOCSIS network to determine DTP calibration data. The DTP calibration data is stored in association with a DTP calibration testing setup of the DOCSIS network in a DTP calibration platform. An operational cable modem termination system (CMTS) conforming to the DTP calibration testing setup retrieves and applies the DTP calibration data from the DTP calibration platform based on the DTP calibration testing setup.

A method and an apparatus v are provided. The method includes: configuring a frame structure and related parameters of a satellite based on a channel feature, a service feature, and a transmission / reception unit capability; determining a resource scheduling scheme based on configuration information of the frame structure and related parameters and historical resource scheduling information; and performing a timing error compensation on the resource scheduling scheme based on a timing advance obtained by time-frequency synchronization, and performing a data transmission / reception based on the resource scheduling scheme after the timing error compensation.

The invention discloses a burst frequency hopping communication system high-precision arrival time estimation method, device and medium, and relates to the field of burst communication system time synchronization, and the method comprises the following steps: a receiving end carries out multi-channel down-conversion and double symbol sampling on a frequency hopping signal, and carries out local sequence correlation processing; aligning related results according to the frequency hopping pattern and the delay difference, performing non-coherent accumulation, and recording frame header stamping time at a peak moment; performing linear fitting on a correlation peak result to calculate a timing error estimation value; querying and obtaining corresponding compensation time by using an offline established time compensation table to correct the timing error estimated value, and obtaining a timing error precise estimated value; and finally, compensating the precise estimation value to the frame header stamping time, and outputting high-precision arrival time. According to the invention, high-precision time synchronization is realized at a low sampling rate, and hardware overhead is effectively reduced.

The invention discloses a timing error estimation method and device for a Nyquist system. The method comprises the following steps: generating a random modulation signal; inserting zero into even bits of the random modulation signal to obtain an initial training sequence; generating a target communication frame based on the initial training sequence and the communication signal; sending the target communication frame to a receiving end of the Nyquist system; and sending the target communication frame to a receiving end, so that the receiving end extracts an initial training sequence in the target communication frame, performing data processing on the initial training sequence to obtain a target training sequence, and performing timing error estimation on the target communication frame based on the target training sequence and a target timing error detection algorithm to obtain a timing error estimation result. According to the method, the tolerance of a timing error detection algorithm to dispersion, polarization mode dispersion effect and differential group delay damage is enhanced, so that accurate timing error estimation can be provided under a complex channel condition, and the method can be widely applied to the technical field of data communication.

The invention relates to the technical field of electronic timers, in particular to an environment self-adaption low-power-consumption management system and method for an electronic timer, and the system comprises an environment sensing array, a physical state evaluator, a dynamic power consumption strategy generator, a closed loop execution and calibration unit and a self-adaption compensator. According to the method, multi-dimensional environment parameters are dynamically collected, a coupling model representing the relation between frequency deviation and compensation power consumption is constructed, combined regulation and control parameters are generated through multi-target optimization by combining the residual electric quantity of equipment and a timing error accumulated value, hardware execution is driven, operation deviation is monitored in real time, and strategy self-adaptive iterative optimization is achieved through a feedback closed loop. According to the invention, the pain point that the precision and the power consumption of a traditional electronic timer are mutually restricted is effectively solved, and the equipment environment adaptive capability, the endurance time and the full life cycle operation stability are greatly improved.

The invention provides a fast differential frame synchronization method under a burst transmission system, which comprises the following steps: a receiver reduces the sampling rate of a burst transmission sequence to four times of a symbol rate, detects the timing error of a down-sampling sequence, calculates an integer parameter and a fraction parameter based on a timing error result, and performs frame synchronization according to the integer parameter and the fraction parameter; then, a cubic interpolation filter is used for calibrating timing errors and recovering a correct data sequence, a differential frame synchronization method which is insensitive to signal amplitude and suitable for any phase deviation is used for searching a frame header position, and whether the size of a correlation peak value is larger than a set threshold value or not is judged; if yes, timing synchronization and frame synchronization are completed; and if not, returning to continue to calculate the timing error. The method is suitable for a burst transmission system, is different from a traditional frame synchronization method, does not need to carry out frequency difference estimation, amplitude control and carrier synchronization in advance, and can quickly realize timing synchronization and frame synchronization, so that the synchronization time is shortened.

A method and network node for timing error estimation and compensation for Fifth Generation (5G) New Radio (NR) downlink (DL) systems with uncalibrated antennas are provided. According to one aspect, a method in a network node includes transmitting a first Channel State Information Reference Signal (CSI-RS) having a first timing compensation and transmitting a second CSI-RS having a second timing compensation, receiving a CSI-RS resource indicator (CRI) in a CSI report from a wireless device (WD), and determining from the CRI which of the first and second timing compensation results in a greater spectrum efficiency.

A user equipment (UE) configured to: determine a maximum autonomous time adjustment step (Tq) for UE progressive transmission timing adjustment; determining a minimum total adjustment rate (Tp) for UE progressive transmission timing adjustments; and adjusting UE transmission timing based at least on the Tq and the Tp such that the UE transmission timing does not exceed a predefined UE transmission timing error.

A receiver has a sample rate converter that outputs samples of orthogonal frequency division multiplexing symbols. The receiver includes a fast Fourier transform engine that receives the samples and converts them into a plurality of frequency domain sub-carriers. A timing control circuit generates a timing error and controls the sample rate converter to adjust a sample rate of the orthogonal frequency division multiplexing symbols based at least in part on the timing error.

Systems, methods, apparatuses, and computer program products for reducing user equipment (UE) transmit (Tx) timing error group (TEG) reporting overhead. A method may include receiving, from a first network element, an indication that a sounding reference signal for positioning will be used for uplink and downlink plus uplink positioning. Configuration for the sounding reference signal resource for positioning may be received from a second network element. The sounding reference signal resource for positioning may be associated with a user equipment transmit timing error group. The first network element or the second network element may be informed that a user equipment will report the user equipment transmit timing error group association to the first network element or to the second network element. The user equipment transmit timing error group association may be reported to the first network element or to the second network element.