339results about "Transmission control/equlisation" patented technology

The invention relates to the technical field of communication engineering, and discloses a power line carrier and wireless dual-mode fusion optimized communication method, which comprises the following steps of: 1, acquiring signal quality, noise and delay data of a power line and a wireless link in real time, and constructing a prediction model by utilizing historical data; step 2, dynamically adjusting a judgment threshold value of link switching in real time based on the prediction model, and ensuring that switching is triggered only when the signal change exceeds a preset range; step 3, based on the dynamic threshold, combining multiple indexes of signal-to-noise ratio, delay, packet loss rate and network load; according to the method, the necessity of link switching can be more intelligently judged by dynamically adjusting the judgment threshold of link switching and adopting a fuzzy logic decision mechanism, frequent switching during tiny fluctuation of signals is avoided by dynamic threshold adjustment, and a fuzzy logic system integrates multiple factors, so that the decision is finer, and the reliability of link switching is improved. And unnecessary delay and resource waste are reduced, so that the stability of a communication system is improved.

The invention discloses an HPLCamp (High Performance Liquid Chromatography) based on deep learning. The invention discloses an HRF dual-mode communication adaptive coding modulation and anti-noise method. The method comprises the following steps: acquiring an optical radio frequency signal amplitude-phase change rate and synchronously sampling and normalizing; calculating a node amplitude-phase residual error to generate a nonlinear mapping coefficient; monitoring coherent change to solve a drift trend, adjusting a modulation coding optimization scheme, compensating distortion and outputting an anti-noise result. According to the method, the instantaneous amplitude and phase of the optical radio frequency dual-mode signal are extracted, a multi-dimensional amplitude-phase characteristic matrix is formed in combination with time domain synchronization and a normalization template, differential residual modeling and nonlinear mapping coefficient calculation are carried out between impedance nodes, and dynamic compensation of amplitude-phase mismatch and envelope offset is achieved. A drift trend quantity is generated based on coherent offset parameter differentiation, feedback is provided for modulation format and coding strategy optimization, amplitude equalization and phase correction are completed, the signal synchronization degree and amplitude-phase consistency are improved, and the steady-state response and anti-disturbance performance of a transmission link are enhanced.

The invention discloses a network communication dynamic optimization method based on multi-module collaboration, and relates to the technical field of network communication, a dual-mode communication module is deployed at each network node, and the network communication dynamic optimization method comprises the following steps: each network node broadcasts own existence information and power line channel characteristics through an HPLC (High Performance Liquid Chromatography) channel of the dual-mode communication module; each network node scans surrounding wireless networks through an HRF channel of the dual-mode communication module and reports own wireless channel quality information to the gateway; the global state sensing module collects all information and constructs a global network view containing physical topology and a channel quality map. A dual-mode cooperation mechanism, a machine learning prediction model and a dynamic decision strategy can adapt to complex dynamic environments such as power line noise fluctuation and wireless interference change, and communication parameters can be autonomously optimized without manual intervention; and meanwhile, the modular design is convenient to expand to a multi-mode communication scene, and has a wide application prospect.

The invention relates to the technical field of intelligent power grid communication, and discloses an HPLC communication-oriented power topology adaptive reconstruction and energy consumption optimization control method, which comprises the following steps of: acquiring HPLC communication characteristic data of power network nodes in real time; constructing a dynamic spatio-temporal topological graph based on the communication feature data and predicting a future topological state; generating a communication power distribution and routing path joint optimization strategy by using a multi-target reinforcement learning algorithm in combination with the predicted future topology state and the real-time energy consumption parameter; verifying the electromagnetic compatibility and protocol compliance of the optimization strategy through a digital twin model, and generating a control instruction which can be executed by equipment; and the transmitting power and the communication route of the HPLC node are dynamically adjusted through the control instruction. According to the method, the communication quality stability and the energy efficiency level are improved, topology dynamic perception, multi-target collaborative optimization and strategy security verification are realized, and efficient and reliable operation of HPLC communication in a complex power grid environment is guaranteed.

The invention provides an alternating current charging pile power line carrier control method, a medium and a system, and belongs to the technical field of alternating current charging piles. Real-time channel characteristic detection is carried out on a charging pile power line to obtain dynamic channel state parameters, forward error correction coding processing is carried out on a charging pile control instruction to obtain a coded carrier data frame, and the coded carrier data frame is sent to the medium; a double-layer coupling game control model is utilized to calculate transmission parameters, coupling optimization of upper and lower game models is realized through a grey wolf optimization game algorithm to obtain an optimal carrier transmission parameter set, and working parameters of a power line carrier transmitter of the charging pile are adjusted according to the optimal parameter set to realize carrier communication. And meanwhile, a comprehensive evaluation index output by the carrier parameter dynamic adjustment function is fed back to the double-layer coupling game control model to form closed-loop iterative optimization, so that the technical problem that carrier communication parameters cannot be adaptively adjusted in real time due to dynamic change of power line channel characteristics along with factors such as load change and switching operation is solved.

The invention relates to the technical field of Internet of Things electric power communication, and discloses a remote software upgrading method and system based on an HPLC high-speed power line carrier network. The remote software upgrading method is applied to software upgrading equipment, and specifically comprises the following steps that S101, a master control node of software to be upgraded is obtained, the master control node completes encryption of an upgrading instruction packet through HPLC network broadcasting, if the master control node is in an offline state, a response is triggered through a wake-up pulse signal synchronized with a power line power frequency period, and if the master control node is not in the offline state, the software to be upgraded is upgraded; and it is ensured that the whole network nodes complete instruction synchronization within the preset time. Omnibearing upgrading and optimization are achieved through three core technologies of dynamic fragmentation transmission, millisecond-level service continuity guarantee and resource limit adaptation, the packet loss rate of a high-noise environment is compressed to 0.1% based on a signal-to-noise ratio self-adaptive fragmentation strategy (128KB-512KB), the average transmission time is reduced to 17.4 minutes from 30 minutes in combination with a multi-path concurrent transmission and breakpoint resume protocol, and the transmission efficiency is improved. And 300ms whole-network instruction synchronization is realized with the assistance of a power frequency synchronization wake-up mechanism.

The invention relates to the technical field of data lines, and particularly discloses a data line system and a data line for intelligently switching data transmission and charging, and the system comprises a dual-core synchronization management module which is used for enabling dual cores to enter an initial detection state through encryption synchronization signaling when equipment is connected; the asynchronous signal processing module is used for generating state judgment parameters through multi-scale sliding window processing and time-frequency domain feature fusion; the consensus decision arbitration module outputs a backtracking trigger signal through dynamic projection transformation and self-adaptive threshold comparison; the state backtracking recovery module is used for generating a retry instruction with a random delay period based on the historical backtracking success rate and the signal quality evaluation; the safety mode control module is used for identifying dominant features by analyzing historical failure records and switching to a safety operation mode; through distributed dual-core cooperative processing and an intelligent fault recovery mechanism, the technical problems of confusion of protocol stacks and deadlock of a state machine in a complex electromagnetic environment are solved, and the anti-interference capability and reliability of the system are improved.

The invention provides an electric energy quality treatment method, system and device based on a charging pile and a medium, and belongs to the technical field of charging piles, and the method is realized through the following steps: employing a mutual inductor to collect three-phase voltage / current; a common analog sampling and DSP processing circuit; harmonic / reactive power is identified based on the instantaneous reactive power theory, and a compensation instruction is generated; according to the compensation control instruction, driving an active filtering inverter circuit to inject compensation current into a power grid so as to reduce the total harmonic current content and improve the power factor; and the main controller generates charging state data according to the sampled voltage signal and current signal, and couples the data to an alternating current power line for transmission through the power line carrier communication module. The system guarantees the quality of the power grid, achieves the high efficiency and reliability of the operation of the charging pile, and gives consideration to the safety of the power grid and user experience.

The invention relates to a discrete distributed load driving system and method, computer equipment and a storage medium. The method comprises the steps that S1, a master control module generates an ordered 0th data packet according to a physical connection sequence of driving modules; s2, the main control module sends the 0th data packet to a first driving module of a one-way data path; s3, the mth driving module receives and analyzes the (m-1) th data packet sent by the upstream to obtain the mth control instruction; s4, the mth driving module drives a load connected with the mth driving module according to the mth control instruction; and S5, the mth driving module cuts off the first sub-data frame from the (m-1) th data packet and repacks the (m-1) th data packet to generate an mth data packet, and sends the mth data packet to a downstream (m + 1) th driving module. The method and the device have the effect of reducing deployment and maintenance cost during large-scale load control.

The invention relates to a narrow-band interference filtering method and device based on an HPLC (High Performance Liquid Chromatography) chip, and belongs to the technical field of power line carrier communication. When pulse processing is carried out on a signal, AGC / DAGC processing is paused if a narrowband interference detection starting signal is detected, a narrowband interference detection module calculates a narrowband interference frequency point by using the signal of which the AGC / DAGC processing is paused, and a filter coefficient used by a narrowband interference elimination module is determined based on the narrowband interference frequency point; and the narrowband interference elimination module carries out narrowband interference elimination processing according to the determined filter coefficient. Wherein the AGC / DAGC processed signal is paused when the signal participating in the calculation of the narrowband interference frequency point is subjected to pulse processing, so that signal fluctuation caused by AGC / DAGC processing is avoided, the calculation accuracy of the narrowband interference frequency point is improved, and the narrowband interference filtering effect is ensured.

The present application relates to the technical field of power communication of Internet of Things, and discloses a remote software upgrading method and system based on HPLC high-speed power line carrier network; the remote software upgrading method is applied to a software upgrading device and specifically comprises the following steps: S101: obtaining a master node of software to be upgraded; the master node completes an encrypted upgrading instruction package through HPLC network broadcasting; if the master node is in an offline state, a response is triggered through a power line power frequency cycle synchronization wake-up pulse signal to ensure that all network nodes complete instruction synchronization within a preset time. The present application realizes all-around upgrading optimization through three core technologies of dynamic fragmentation transmission, millisecond-level service continuity guarantee and resource limit adaptation; an adaptive fragmentation strategy (128KB-512KB) based on a signal-to-noise ratio compresses a packet loss rate in a high-noise environment to 0.1%; combined with multi-path concurrent transmission and a breakpoint resume protocol, average transmission time is reduced from 30 minutes to 17.4 minutes; and a power frequency synchronization wake-up mechanism is used to realize 300ms network-wide instruction synchronization.

The invention discloses a wireless signal synchronization method and device for a dual-mode carrier communication system and electronic equipment, and belongs to the technical field of power line carrier communication. The method comprises the following steps: receiving a wireless signal frame, extracting frame data matched with a predefined scrambling sequence length based on a sampling point position of the wireless signal frame, and dividing the frame data into a plurality of groups of data; performing descrambling processing on each group of data according to the scrambling sequence to obtain multiple groups of descrambling data; according to preset autocorrelation times, carrying out autocorrelation calculation on the multiple groups of descrambling code data to obtain multiple autocorrelation results; and superposing the plurality of self-correlation results to obtain a superposition result, and determining the frame synchronization position of the wireless signal frame based on the superposition result. According to the invention, the synchronization effect of wireless signals is improved, so that high-quality wireless signal transmission is realized.

The invention relates to the technical field of circuit fault processing, and discloses an automatic identification and remote isolation method for a fault section of a low-voltage distribution line, and the method comprises the steps: building a reference fingerprint database based on channel state information through a central coordination node; monitoring real-time channel frequency response and executing threshold comparison to judge suspected fault points; triggering an active impedance control unit of the terminal agent node to execute controlled perturbation; a transmission line network model is used for calculating a theoretical transmission function variable quantity, fitting analysis is carried out on the theoretical transmission function variable quantity and a measured value, and a physical fault is judged and load interference is stripped through a normalized residual coefficient; calculating a residual drift distance between adjacent nodes based on the topological mapping table to execute differential positioning so as to lock a fault physical interval; and issuing a tripping message, and driving the circuit breaker to execute physical isolation at the power frequency zero crossing point. According to the scheme, on-line fault identification and isolation are realized through active impedance perturbation and distributed residual analysis, and the robustness of fault judgment in a complex load environment is improved.

According to the dual-mode direct-connection networking method and system for the terminal and the electric energy meter, the electronic equipment and the storage medium, provided by the invention, the method comprises the following steps: evaluating a terminal side service adaptive link, converting an industrial standard into a quantitative link quality value, dynamically adjusting a link evaluation index weight and a terminal dominant shunting strategy, avoiding master station scheduling time delay, and improving the efficiency of the terminal and the electric energy meter. In a direct connection scene, a metering data acquisition period and a control instruction time delay are ensured to meet index requirements, terminal-ammeter collaborative predictive self-healing, fusion of working conditions and other information are used for predicting link quality and judging the risk of link transmission, and when a fault is triggered, the data when the fault occurs is complementarily transmitted by switching the link, so that the integrity of the data is ensured, and the data transmission efficiency is improved. The link failure reason is traced in combination with the working condition, and the link is repaired according to the tracing result, so that the link repairing speed can be increased, a prediction-self-healing-fault-repairing-optimization complete closed loop is formed, and the reliability and accuracy of long-term operation of the scheme are ensured.

The invention discloses an efficient data transmission method for HPLC (High Performance Liquid Chromatography) dual-mode communication, relates to the technical field of data transmission, and solves the problems that when low-priority tasks are congested, an undifferentiated transfer strategy is adopted, task importance grading is not considered, and transmission of important low-priority tasks is interrupted; in order to solve the technical problem that congestion is difficult to relieve due to lack of dynamic monitoring and feedback after transfer, the method comprises the following steps of: finely dividing task priorities; a high-priority task adopts a dual-mode parallel transmission and first arrival effective mechanism, so that the transmission success rate is improved; low-priority tasks are scheduled in a hierarchical manner according to secondary priorities, the resource utilization rate is improved, the transmission interruption rate of the important low-priority tasks is reduced by quantifying the secondary priorities of the low-priority tasks, adopting a hierarchical transfer strategy and combining dynamic monitoring and feedback, and a time slot and bandwidth cooperative adjustment mechanism of HPLC and HRF is established; smooth bandwidth transition is realized through dynamic subcarrier binding and hybrid modulation, and resource waste is avoided in combination with global resource pool management.

The invention provides an intelligent electric meter interaction method and system based on dual-mode heterogeneous network communication, belongs to the field of power line carrier communication, and solves the problem of communication stability still existing in intelligent electric meter interaction under a dual-mode communication architecture. The method comprises the following steps: under the condition that a link layer of a high-speed power line carrier communication channel detects that a subcarrier-level bit error rate or a pilot signal-to-noise ratio has narrowband abnormality and lasts for a preset number of message periods, loading the link layer of the high-speed power line carrier communication channel through programmable impedance in a maintenance time slot, pilot frequency receiving results are collected under the disturbance condition and the non-disturbance condition, and a reflection mark memory function is formed; the reflection mark memory function obtained by maintaining the time slot each time is extracted and stored, a historical record is formed, and the historical record comprises channel frequency domain reflection coefficient changes and a group delay sequence; and identifying the arrival time of the main reflection component based on historical records, and converting the arrival time of the main reflection component into a suspected abnormal position interval.

The invention discloses a low-voltage power line power frequency communication interference suppression and adaptive demodulation method and system, and the method comprises the steps: firstly, detecting the voltage zero crossing of a power grid in real time, and dynamically calibrating a communication time slot based on an actually measured power frequency, thereby achieving the precise power frequency synchronization; injecting a pilot signal into the synchronous time slot window, and judging line topology mutation through coupling of pilot response and a preset signal-to-noise ratio threshold, thereby completing topology perception and verification; triggering channel reestimation in combination with a topological change result, rejecting fundamental wave and multi-order harmonic interference from channel response of least square estimation, and updating a channel model by adopting a time-varying smoothing algorithm; then, a low-noise time window is determined according to the corrected zero cross point, key data packets are scheduled preferentially, and high-reliability anti-interference transmission is achieved; and finally, dynamically and cooperatively adjusting the transmitting power, the receiving filter and the phase compensation based on the newest channel and topology state to form closed-loop self-adaption. According to the scheme, the intelligent degree is high, and the communication stability and the system maintainability are greatly improved.

The invention discloses a concurrent communication method and system based on a power line carrier communication network, and the method comprises the steps: obtaining service parameters and communication parameters in the power line carrier communication network, and carrying out the priority division of services; after the topology change of the power line carrier communication network is stable, the total number of nodes and the number of agent nodes are obtained, and the topology change time is recorded; calculating network channel evaluation time and a proxy node number threshold value; subcarrier division and distribution are carried out on each service according to service parameters, communication parameters, the total number of nodes and the number of proxy nodes of the power line carrier communication network; and recording a system communication success rate in the network channel evaluation time, calculating an SNR value and an SNR fluctuating value of a subcarrier channel, calculating a subcarrier static distribution time length by combining the system communication success rate, the SNR value and the SNR fluctuating value, and simultaneously communicating each service on the distributed subcarrier. According to the invention, the carrier network communication efficiency and the overall execution efficiency can be improved, and multi-thread processing of different service data among carrier nodes is realized.

The invention relates to the technical field of communication, and discloses a dual-mode communication method based on power line carrier and wireless, which comprises the following steps: S1, when equipment is started, detecting a network environment, and configuring a communication mode with strong signal and high network quality according to a detection result; s2, packaging data to be sent through a corresponding communication mode, and transmitting the data through a corresponding physical layer interface after data packaging is completed; and S3, dynamic data packaging and transmission: a data packaging strategy: dynamically adjusting the data packaging and coding strategy according to a communication mode, and using forward error correction coding for high noise for a power line carrier. Through an intelligent selection mechanism and an environment perception module, the system can evaluate and use the optimal communication path and mode in real time to cope with network conditions with poor stability and changing environment factors so as to improve the stability and reliability of the whole network.

The application discloses a communication method, device and system, and belongs to the technical field of communication. The method comprises the following steps: a target third node receives a first electromagnetic wave signal sent by a first adjacent node, carries out target processing on the first electromagnetic wave signal to obtain a second electromagnetic wave signal, and sends the second electromagnetic wave signal to a second adjacent node. The first node, at least one third node and the second node are sequentially arranged on a cable, the target third node is adjacent to the first adjacent node and the second adjacent node among the nodes, and the target processing comprises processing for carrying out conjugate inversion on the spectrum of the electromagnetic wave signal. The application can solve the problem that nodes cannot effectively communicate, and is used for processing electromagnetic wave signals transmitted on the cable.

Systems and methods for amplifying signals propagated along a span of cable that imposes a loss tilt, and such that the loss tilt is canceled so as to provide unity gain, by modulating amplification as a function of frequency of an amplifier adjacent the span.

The invention relates to the technical field of intelligent power grid communication, discloses a dynamic power distribution method for a power line carrier communication heterogeneous network, and solves the problems of insufficient reliability of single medium communication and dynamic resource distribution bottleneck of heterogeneous converged communication. According to the technical scheme, the method comprises the four steps of channel quality dynamic evaluation, constraint type self-adaptive judgment, optimal medium selection and intelligent power distribution, a water injection algorithm, an iterative reverse water injection method and the like are combined, real-time characteristics of power lines and wireless channels and different power constraint scenes are adapted, differentiation strategies are designed for services with different priorities, and the optimal power distribution is realized. And an energy efficiency optimization feedback mechanism is also arranged. The method can improve the power distribution flexibility and the channel resource utilization rate of the heterogeneous network, meets the differentiated communication requirements of the smart grid, guarantees the communication reliability, and provides support for the reliable operation of the smart grid.

The invention discloses a power line carrier communication method and device, and belongs to the technical field of communication. The power line carrier communication method is applied to a sending end, and comprises the following steps: determining a first length of a preamble symbol and a second length of a frame control symbol based on the latest channel quality; the first length is smaller than a first preset length and / or the second length is smaller than a second preset length corresponding to the communication frequency band; sending a data unit frame to a receiving end based on the first length and the second length; the data unit frame includes a signal frame. According to the power line carrier communication method and device provided by the invention, the frame structure of a high-speed power line carrier communication physical layer can be optimized by dynamically adjusting the lengths of the preamble symbol and the frame control symbol based on the latest channel quality, the protocol overhead under a high signal-to-noise ratio can be greatly reduced on the premise of considering the low signal-to-noise ratio communication performance, and the communication performance of the high-speed power line carrier communication is improved. The transmission efficiency of the data load in the data unit frame in the high-speed power line carrier communication can be improved.

The invention relates to the field of communication, and particularly discloses a multi-band communication intelligent main and auxiliary frequency band switching method and system, and the method comprises the steps: measuring the signal-to-noise ratio, bit error rate and interference intensity of a main frequency band and an auxiliary frequency band, recording the original value of an index, and providing data support for quality evaluation; the signal-to-noise ratio, the bit error rate and the interference intensity are normalized, the comprehensive mass fraction is calculated according to the weight, and the higher the fraction is, the better the frequency band quality is; setting a switching threshold value, a hysteresis threshold value and the minimum residence time as a plurality of cycles; when the main frequency band is currently used, if the comprehensive score of the main frequency band is smaller than the difference between the switching threshold and the hysteresis threshold and the score of the auxiliary frequency band is high, the auxiliary frequency band is switched to if the residence time is met; when the auxiliary frequency band is currently used, if the main frequency band fraction is greater than the sum of the switching threshold and the hysteresis threshold and is high, and the residence time is met, the main frequency band is switched back; analyzing the quality trend of a main frequency band by using a sliding window with a plurality of lengths, and if continuous deterioration is predicted, switching an auxiliary frequency band in advance; and if the fractions of the main and auxiliary frequency bands are high, parallel joint transmission is started.

A digital filter (6) performs polarization variation compensation for data of at least two polarizations in which a plurality of known signals are inserted at predetermined positions in each frame by means of a filter in which a tap coefficient is set. Before a frame synchronization unit (4a) generates a frame signal from an output signal of a digital filter, a tap coefficient update circuit (7) updates the tap coefficient such that the difference between the amplitude value of the data and the amplitude value that the data should take is small. After a frame signal is generated, a tap coefficient updating circuit (7) receives the frame signal in a feedback manner, detects a known signal from the data on the basis of the frame signal, and updates the tap coefficient such that the difference between the detected known signal and the true value of the known signal becomes small.

Devices and methods that present a graphical user interface (GUI) by which a user may manually adjust the level and tilt settings of an amplifier in a communications network. The GUI preferably includes a plurality of user-interactive icons for making the adjustments, where the effects of the adjustments on level and tilt are contemporaneously shown in the display.

To provide a wireline receiver with improved timing and associated margins. [Solution] A wireline receiver comprising a data sampler sa0, a first edge sampler sa1, a second edge sampler sa2, a base phase detection circuit 222, an additional phase detection circuit 224, a clock circuit 240, and a phase shift circuit 250, wherein the data sampler, the first edge sampler, and the second edge sampler, when triggered by the data clock, the first edge clock, and the second edge clock, respectively, sample and compare the receiver signal to determine whether the receiver signal exceeds the data threshold level, the first threshold level, and the second threshold level, thereby providing a basis for phase detection. In response to phase detection, the clock circuit provides the first edge clock and the data clock, and the phase shift circuit provides the second edge clock by phase shift.

The invention relates to the technical field of PLCs, in particular to a data communication control method and device for PLC communication, and the method specifically comprises the steps: determining the congestion level of each communication link through the real-time analysis of the bandwidth utilization rate, the average delay time and the packet loss rate of each communication link; acquiring the priority of the data frame transmitted by each communication link, comparing the priority with the corresponding congestion level, and calculating the comparison characteristic value of the PLC equipment at the sending end; adjusting the priority of the data frame transmitted by the sending end PLC equipment based on the comparison characteristic value; and carrying out data frame transmission based on the adjusted priority of the data frame and the congestion level of the communication link. According to the invention, congestion aggravation caused by improper path selection is avoided, the communication efficiency between PLC devices is improved, loss and retransmission of PLC communication data are reduced, and the utilization rate of industrial network communication resources is improved.

A system includes a first integrated circuit coupled to a printed circuit board (PCB) and a second integrated circuit coupled to the PCB. The system further includes a ground referenced signaling (GRS) link coupled between the first integrated circuit and the second integrated circuits through the PCB. Unencoded data is transmitted on the GRS link according to a memory coherence protocol.