301 results about "Propagation delay" patented technology

The invention belongs to the technical field of power system measurement, and relates to a three-phase power parameter wireless synchronous measurement and vector analysis method and system, and the method comprises the following steps: generating and broadcasting a synchronous pulse code containing triggering phase information; generating a predicted phase angle; obtaining a comprehensive phase deviation value; performing dynamic feature separation processing on the comprehensive phase deviation value to generate a slowly-varying propagation delay feature and a transient prediction error feature; injecting the prediction error characteristics into a local phase predictor for calibration; acquiring phase voltage / current data based on the compensated sampling time, and calculating a fundamental wave effective value and a phase angle relative to a local calibration time reference; and packaging the fundamental wave effective value, the phase angle and the local timestamp into a simplified data packet and transmitting the simplified data packet to an analysis terminal. According to the method, the problems that in a traditional mode, satellite time service rejects signals in a substation indoor or underground scene, and synchronization interruption is easily caused by electromagnetic interference are solved.

The invention discloses an expressway congestion situation prediction method. The method comprises the following steps: step 1, data acquisition and preprocessing: traffic state data is acquired in real time through monitoring equipment installed at key traffic nodes of an expressway; step 2, space-time joint data embedding: fusing node space topology, time features and position codes to form multi-dimensional input; step 3, heterogeneous space-time self-attention coding: fusing three types of attention of remote collaboration, local window and dynamic time sequence dependence, and uniformly modeling space conduction, global association and historical evolution characteristics among highway nodes; step 4, heterogeneous multi-head attention aggregation: integrating three types of heterogeneous attention outputs, and mapping the three types of heterogeneous attention outputs to the same embedding space; and 5, traffic jam situation prediction: setting a regression branch and a classification branch. The method aims at overcoming the defects in the aspects of propagation delay modeling and remote semantic association expression in the prior art.

The invention relates to the technical field of communication, and discloses an access point, terminal equipment and a short-distance communication time synchronization method and system.The access point equipment and the terminal equipment each comprise a baseband signal processing unit, a radio frequency unit, an antenna, a global time counter and a clock compensation module. The time synchronization method is executed by a target terminal: receiving a beacon frame broadcasted and sent by an access point; calibration information is embedded in the beacon frame, and the calibration information comprises timestamp information and a transmitting power parameter; calculating actual propagation delay of the access point and the target terminal based on the timestamp information; calculating target propagation delay of the access point and the target terminal based on the transmitting power parameter; calculating a delay error between the actual propagation delay and the target propagation delay; and calibrating the clock skew of the target terminal based on the delay error. The time, frequency and link calibration of the access point and the target terminal can be completed by using the one-way time broadcast, and the calibration precision is high.

The invention discloses a renewable energy penetration power distribution system scheduling method and system based on a block chain, and relates to the technical field of power distribution system scheduling, and the method comprises the following steps: constructing a cross-hierarchy time sequence integrity observation layer, introducing a multi-source high-precision reference signal into a synchronous time service link, and carrying out the multi-source high-precision reference signal; the fingerprint acquisition module is used for acquiring external environment electromagnetic disturbance and atmospheric propagation delay data in real time and generating a phase offset fingerprint corresponding to a time service state; and performing causal decomposition operation based on the phase offset fingerprint, performing noise stripping processing on the acquired electromagnetic disturbance signal, and extracting a real time service error trajectory. Through combination of multi-source time service correction, phase fingerprints and virtual impedance time marks, time self-calibration and cross-node synchronization of the block chain power distribution system are realized, account book wrong sequence caused by time service drift is eliminated, power flow reversal is suppressed through time reversal traction and dynamic constraint, scheduling stability and energy flow consistency are ensured, and the power distribution efficiency is improved. The system safety and the clean energy utilization efficiency are improved.

The invention relates to the technical field of underwater communication, in particular to a collision avoidance method suitable for digital underwater acoustic communication, which is characterized in that a neighbor propagation delay mapping database is maintained at each communication node, and inter-node propagation delay information is acquired through passive monitoring and active detection. When a node wants to send data, combining delay mapping to predict a channel occupation time slot, and judging whether the sending is conflicted with an RTS / CTS handshake stage, a data transmission stage and an ACK (Acknowledgement Character) confirmation stage which are carried out by a neighbor; if a conflict risk exists, the node delays to send the RTS and then initiates handshake until the security window is finished, so that collision caused by hidden nodes and exposed nodes is avoided, meanwhile, parallel transmission under the conflict-free condition is allowed, the channel space-time multiplexing efficiency is improved, the network throughput can be remarkably improved, the data packet collision rate is reduced, and the network performance is improved. And the node access fairness is improved.

The invention provides a method and a device used in a node for wireless communication. The method comprises the following steps: a first node determines propagation time delay according to a first parameter; and compensating the sending time of the first data in advance according to the propagation time delay. Wherein the first parameter comprises at least one of the following information: position information of the first node, ephemeris information of a service satellite, public timing advance, parameter effective time, reference signal sending time or an identifier of a track section where the satellite is located.

The invention discloses a high-permeability new energy power distribution network collaborative optimization method, system and device and a storage medium, and belongs to the technical field of information, and the method comprises the steps: obtaining wind power plant operation data and signal intensity, processing and fitting a signal attenuation trend, recognizing mist environment path loss, obtaining a wind power output probability distribution function, and determining an output fluctuation range. Predicting an output deviation scene, calculating a wireless signal fluctuation probability, and extracting signal fluctuation characteristics; establishing a channel fading model in combination with mist path loss, outputting wireless signal propagation delay, and determining a potential delay interval of a scheduling instruction of the energy storage system; simulating dispatch out-of-order and power regulation instruction conflicts, and generating dispatch out-of-order evaluation data; combining historical wind power output data to judge power flow fluctuation, adjust an energy storage unit response sequence, generate a power adjustment instruction sequence, calculate adjusted power flow distribution data, and generate energy storage and topology configuration optimization data, so that the operation reliability and economical efficiency of the wind power plant are remarkably improved.

The invention discloses an audio signal howling suppression method and device, a storage medium and electronic equipment, and the method comprises the steps that a control terminal receives a current data frame sent by intelligent equipment, and the current data frame comprises a current audio signal collected by the intelligent equipment, the sending delay of the intelligent equipment and the latest network propagation delay; the control terminal determines end-to-end time delay based on the sending time delay, the network propagation time delay, the playing time delay and the receiving time delay of the control terminal, and determines final time delay based on the end-to-end time delay and a time delay estimation value calculated by the control terminal; and the control terminal performs howling suppression processing on the current audio signal based on the final delay. By applying the howling suppression method and device, the howling suppression effect can be guaranteed, and meanwhile the processing calculation amount is reduced.

The invention discloses a scenic spot traffic flow prediction-oriented multi-source heterogeneous data driven space-time modeling method. The method comprises the following steps: acquiring traffic historical data, a road network topological structure and scenic spot related auxiliary factors, and constructing multi-dimensional tensor and graph structure representation; spatio-temporal feature learning is realized through time slice embedding and spectrogram position coding, and a tourism enhancement tensor is constructed in combination with scenic spot auxiliary semantic factors and serves as node regulation and control guide input; and introducing a cross attention mechanism which is jointly regulated and controlled by a tourism regulation factor and a propagation delay factor into the encoder, and fusing multi-source embedded information to generate a traffic flow prediction result. The method is suitable for scenes with severe flow change such as holidays, holidays and hot scenic spots, the dynamic regulation and control relation of tourism activities to traffic states can be accurately reflected, and the response capability, interpretability and robustness of a traffic prediction model to high-association nodes are improved.

The invention relates to the technical field of nondestructive testing of constructional engineering, and discloses a laser measuring instrument for nondestructive testing of concrete cavities, which comprises a laser interference measuring assembly, a paraxial sound wave excitation assembly, coaxially arranged anti-interference equipment and a cooperative control processing system. The sound wave excitation assembly performs wide-area excitation on the concrete surface, and the laser interference measurement assembly receives returned light through a clean light path constructed by the anti-interference equipment. The cooperative control processing system establishes acousto-optic time-frequency association by using an adaptive control module, generates a phase compensation angle according to ranging data to eliminate phase lock loss caused by sound wave propagation delay, and monitors a spectral gradient to automatically trigger fixed-frequency locking to capture resonance response. And the signal analysis module uses the phase compensation correction signal, and outputs cavity features through dual data cleaning and thermodynamic diagram analysis. According to the invention, the problems of time-space synchronization and weak signal extraction of long-distance non-contact detection in a complex environment are effectively solved.

The invention relates to the technical field of geological disaster early warning, in particular to a risk grading method for tunnel seismic wave data and geological information fusion, which comprises the following steps: S1, collecting tunnel multi-temporal seismic wave amplitude, frequency response and propagation delay information, identifying an abnormal response event, extracting a spatial propagation path of the abnormal response event in combination with a tunnel structure, generating a seismic wave evoked response event chain set; s2, geological information such as a drilling profile, a geological structure line and lithologic distribution is fused, and a structure chain type conduction diagram is output; and S3, counting the activeness, the derivation direction and the time sequence trend of the structural unit in the conduction diagram, calculating a trend activation factor, and generating a risk level map with predictability and evolution ability. According to the method, the earthquake response event chain and the structure conduction network are constructed, the multi-source geological information is fused, and the trend activation factor is introduced, so that the dynamic, accurate and predictable grading evaluation of the tunnel structure risk is realized.

The invention provides a fault root cause association method, device and equipment and a readable storage medium, and the method comprises the steps: converting the aging constraint of root cause association from a global fixed time window to differentiated configuration according to a network element-service combination pair; for each root cause association rule, an exclusive association aging window is defined in combination with respective network element-service context of two related faults, so that alarm omission or wrong association caused by a fixed window is avoided, and the accuracy of root cause analysis is remarkably improved; and the correlation aging window is used as a time rationality criterion for establishing the causal relationship, so that the root cause correlation is allowed to be constructed and a directional hierarchical causal chain is constructed only on the premise of reasonable propagation delay, and the restoration of a fault propagation path in a complex heterogeneous environment is realized.

Circuitry and method are described for enabling multiple loads on a differential low voltage differential signaling pair (M-LVDS). A printed circuit board (PCB) contains a M-LVDS driver and leads that route a main channel that carries a differential signal from the driver to an area in which loads are populated. The main channel is split into branches that contain application-specific integrated circuits (ASICs) as the loads. The branches have the same characteristic impedance as the main channel. Filters are disposed in each branch and are coupled between the driver and the ASICs. Each filter is a first order or higher filter. Fewer filters than ASICs are on each branch, with the filters being disposed between the driver and ASICs closest to the driver (with smaller propagation delay). The filters are configured differently at each ASIC input to compensate for the delay.

The invention discloses an osmotic pressure analysis method and device fusing model optimization and physical inversion and a medium, and the method comprises the steps: calculating correlation coefficients of a specified reservoir water level and osmotic pressure under different time lags based on cross-correlation function analysis, and recognizing a differential nonlinear feature corresponding to the maximum correlation coefficient; aiming at the differentiated nonlinear characteristics of different dam types, constructing a plurality of corresponding diagnosis prediction models in parallel, and establishing a model selection decision rule to select an optimal diagnosis model; according to delay parameters obtained through cross-correlation analysis, a permeability coefficient is reversely deduced through a pore medium heat transfer diffusion theoretical formula; according to the regression slope and the theoretical value attenuation factor of the optimal model, a permeability coefficient is reversely deduced in combination with a correction diffusion equation, credibility evaluation and weighted fusion are performed on the permeability coefficient, and a comprehensive permeability coefficient is calculated; and diagnosing the soil type and the permeability characteristic grade. According to the method, the propagation delay characteristic of reservoir water level change in the pore medium can be accurately quantified, and the inversion precision of the permeability coefficient and the engineering applicability are improved.

A method and apparatus for performing measurement under a long propagation delay in a wireless communication system is provided. A wireless device receives, from a network, a measurement configuration including an information on a basic measurement window and an information on a first additional measurement window. A wireless device performs a measurement within the basic measurement window. A wireless device performs a measurement within the first additional measurement window, based on measurement results from the basic measurement window. A wireless device reports, to the network, measurement results from the basic measurement window and the first additional measurement window.

Systems, methods, and software are disclosed herein for localizing an atmospheric duct based on remote interference. In an implementation, a method of operating a computing device for localizing an atmospheric duct includes detecting cross-cell interference during an uplink transmission at a network cell, identifying a source of the cross-cell interference based on a RIM reference signal embedded in the cross-cell interference, and generating localization information of an atmospheric duct based on position information of the network cell relative to the source and a propagation delay of the cross-cell interference.

The method comprises the following steps: a terminal device sends first indication information to a network device, wherein the first indication information is used to indicate an uplink timing advance TA of the terminal device to the network device. Thus, the terminal device can directly send its corresponding uplink TA to the network device. In this way, the network device can accurately determine the uplink TA corresponding to the terminal device, thereby tracking the NTN propagation delay, reliably and accurately compensating the RTD of the terminal device, and accurately scheduling the signaling and service timing of the terminal.

The application discloses a kind of based on multimodal fusion expressway long tunnel real-time fire source detection method and system, it is estimated by introducing smoke temperature airflow dynamic propagation delay under wind speed constraint, visible light, infrared, smoke concentration and environmental temperature and so on heterogeneous data are phase shift compensation and space-time unification, different modal can correspond to the same fire physical time, then respectively extract visual side flame profile, thermal gradient feature and sensing side smoke temperature mutation, time evolution characteristics, and utilize cross-modal interactive fusion to form the fusion feature expression with image representation ability and environmental perception ability, finally, combine target detection and inverse perspective positioning Output fire confidence and fire source coordinates, to solve the problem that multi-source data is difficult to effectively align, early fire source feature weak leads to inaccurate identification, false alarm under complex disturbance is higher and fire source position is difficult to determine in real time accurately, improve the real-time, accuracy and engineering applicability of tunnel fire source detection.

The application discloses an implementation method suitable for a high-throughput satellite communication hybrid duplex system, which acquires double-network statistical basic data containing end station round-trip propagation delay distribution and phased array antenna transmission-reception switching characteristics; constructs a dual-coupling time planning mathematical model with original network and mirror network time window start and end time as optimization variables, and solves optimal time parameters under the conditions of satisfying physical constraints such as delay reachability, antenna switching safety and main station reception zero overlap; and the main station broadcasts time slot configuration instructions to cooperatively control all network end stations to perform hybrid duplex transmission-reception. The application also introduces a closed-loop feedback mechanism based on end station local observation, estimates delay drift by using network clock reference information, and corrects model input. The application realizes zero conflict hybrid duplex communication under complex physical constraints by converting static configuration into dynamic mathematical optimization solution, and improves satellite spectrum resource utilization rate and system operation stability.

Methods and apparatuses for comparing redundant signals in functional safe systems are provided, including methods for mitigating differing signal path delays and for signal weighting of the redundant signals are proposed. An Apparatus includes a first signal path for a first measurement signal of a physical quantity, the first signal path having a first signal propagation delay; a second signal path for a second measurement signal of the physical quantity, the second signal path having a second signal propagation delay different from the first signal propagation delay; a delay compensation circuit configured to compensate for a difference between the first and second signal propagation delays to generate delay-compensated first and second measurement signals; and comparison circuitry configured to compare the delay-compensated first and second measurement signals.

The embodiment of the application provides a positioning method and device, the method comprises the following steps: obtaining navigation information of a terminal device and M pieces of positioning information of N positioning lamp beads, the M pieces of positioning information comprises a lamp bead identifier, light intensity and propagation delay, N is an integer, and M is an integer greater than or equal to 1. According to the navigation information and the M pieces of positioning information of the N positioning lamp beads, a first position is determined. A plurality of estimated positions of the terminal device at a previous moment are obtained. According to the first position and the plurality of estimated positions, a target position of the terminal device is determined. The technical scheme of the application can effectively improve the accuracy of positioning processing of the terminal device.

A monitoring apparatus for monitoring propagation delay of a signal along a path through an integrated circuit is disclosed. The monitoring device comprises a delay device configured to receive the signal and to generate a delayed signal, the delayed signal being a version of the received signal that is time delayed with respect to the received signal, a detection window device configured to generate a detection window signal based on a clock signal of the integrated circuit, and a determination device configured to determine the detection window signal based on the clock signal. The determination means is configured to determine whether a value of the received signal differs from a value of the delayed signal during a time defined by the detection window signal, and to generate a determination signal based on the determination.

The embodiments of the present disclosure provide a wireless communication method, a terminal device, and a network device. The network device can learn a difference between propagation delays from a serving satellite and a neighbor satellite to a terminal, thereby optimizing neighbor cell measurement configuration. The wireless communication method includes: transmitting, by a terminal device, first information including at least one of: signal propagation distance information from a serving satellite and a neighbor satellite of the serving satellite to the terminal device; signal propagation delay information from the serving satellite and the neighbor satellite of the serving satellite to the terminal device; or signal quality of the serving satellite and / or at least one neighbor satellite of the serving satellite as measured by the terminal device.

The invention discloses a timing advance (TA) determination method and device, electronic equipment, a storage medium and a computer program product. The method comprises the following steps: a first device receives a synchronization signal sent by a network device of a non-terrestrial network (NTN), the synchronization signal is used for downlink time sequence synchronization, the first device is deployed in a satellite in the NTN, and the satellite works in a transparent forwarding mode; determining a first moment based on the synchronization signal, the first moment being associated with beam switching of downlink transmission; and determining a feed link propagation delay corresponding to the first moment, and determining a TA corresponding to the first moment by using the feed link propagation delay, the TA being associated with beam switching of uplink transmission.

A wireless communication method, a terminal device, and a network device are provided. In the wireless communication method, a terminal device transmits, on a first uplink channel, first information for a propagation delay compensation (PDC) procedure to a network device.

The application discloses a new energy base-oriented information sensing and transmission system and relates to the technical field of power Internet of Things.The system comprises an edge convergence gateway and a plurality of sensing terminal nodes.The edge convergence gateway constructs a dynamic topology according to micro-meteorological vector data, selects a cluster head node at the upstream of physical field propagation, calculates and issues a theoretical envelope delay parameter, and the sensing terminal node uses a perturbation signal modulated by an orthogonal pseudo-random spread spectrum code and the parameter to complete phase alignment, uses the parameter to perform space-time compensation and predicted waveform construction on received cluster head reference data, calculates a numerical residual error between a local waveform and a predicted waveform, quantitatively encodes sparse residual errors to generate an upper report data packet.The application eliminates the physical field propagation delay caused by spatial distribution, effectively reduces the differential data energy, and solves the problem of real-time and efficient transmission of high-frequency waveforms under limited bandwidth.

The reuse of hybrid automatic repeat request (HARQ) process identifiers (IDs) is enabled under controlled conditions. Consequently, certain delays may be reduced, including those delays that may be associated with waiting for a process ID to be released. A user equipment (UE) may initiate new transmissions sooner than would be allowed according to existing mechanisms. The sooner transmissions may be particularly convenient in those situations wherein previous data has been successfully delivered. Network resources may, as a consequence, be use more efficiently in time-sensitive communication scenarios. An adaptable feedback process, from satellite to UE, is also enabled, which provides the satellite with a flexibility to adjust to different latency and resource constraints, thereby improving overall communication robustness. The flexibility is particularly beneficial in NTNs with higher propagation delays.

The radio-frequency power supply device of the present invention comprises: a radio-frequency amplification unit that carries out radio-frequency amplification by the switching operation of amplifying elements; and a gate drive unit that inputs a gate signal to the gate terminals of the amplifying elements in the radio-frequency amplification unit to drive the amplifying elements. The amplifying elements in the radio-frequency amplification unit are LDMOSFETs, and the switching elements in the gate drive unit are GaNFETs. By utilizing LDMOSFETs as the amplifying elements, a high-output / high-frequency radio-frequency is output, and by utilizing GaNFETs as the switching elements, individual differences in propagation delay in the switching elements are reduced, and the fluctuation in the dead time DT and pulse width Ton of the gate signal for carrying out PWM control are suppressed to improve accuracy and reproducibility, to improve high-speed response characteristics, and to suppress high-frequency resonance.

Systems and methods for uplink transmission timing are provided. In some embodiments, a method of operation of a wireless device in a cellular communications network includes receiving a transmission, from a network node, in a downlink slot; determining a reference uplink slot index in an uplink frame timing of the wireless device where the reference uplink slot index corresponds to the downlink slot in which the transmission was received; and transmitting an uplink transmission in response to the received transmission in an uplink slot a number of slots, K, after the determined reference uplink slot index. This may enable transmission in satellite radio access networks by establishing the transmission timing relationships that are suitable for long propagation delays and the large differential delay in a spotbeam in satellite communications systems that may range from sub-milliseconds to tens of milliseconds.

Methods, systems, and devices for asynchronous multi-level signal sampling are described. A system may generate a first clock signal by delaying the master clock signal by a first duration that is based on a first propagation delay associated with a first amplifier for a data signal. The system may generate a second clock signal by delaying the master clock signal by a second duration that is based on a second propagation delay associated with a second amplifier for the data signal. The system may sample, by a first sampling circuit based on the first clock signal, a first amplified data signal outputted by the first amplifier. And the system may sample, by a second sampling circuit based on the second clock signal, a second amplified data signal outputted by the second amplifier.