232results about "Transmission control/equlisation" patented technology

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 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 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 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 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 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.

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.

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.

The invention relates to the technical field of industrial control system physical layer state monitoring, and discloses an electromagnetic shielding effectiveness control system of a communication equipment connector, which comprises a protocol time sequence synchronization module, an idle noise acquisition module, a state identification and processing module and a decision and interface module, and after determining that continuous noise drift exists, the state identification and processing module firstly suppresses alarm output, communicates with other similar systems in a neighborhood so as to judge cooperative drift, and only releases suppression and outputs an alarm when determining that non-cooperative drift exists. An originally isolated single-point decision which may generate misjudgment due to global environment fluctuation is converted into a system-level diagnosis conclusion which is based on distributed consensus and can clearly distinguish local failure of the connector from global environment change, and the accuracy and reliability of state evaluation of the industrial control system in a complex electromagnetic environment are improved.

The application discloses a dynamic bit and power loading method suitable for power line carrier communication, which comprises the following steps: a sending end and a receiving end train and prestore at least one subcarrier allocation table (SAT) set through channel detection; mode indication information of a Payload part is set in frame control information of a physical layer of the sending end, and when the mode indication information is in a dynamic loading mode, dynamic loading parameters required by the dynamic loading mode are determined; corresponding dynamic loading mode SAT_ID parameters are selected according to the dynamic loading parameters, and the corresponding SAT_ID parameters are configured in corresponding bit positions of the frame control information; after the corresponding SAT_ID parameters are configured, a load time domain waveform is generated according to the selected dynamic loading parameters from the subcarrier allocation table (SAT) set; the load time domain waveform, a preamble and a frame control time domain waveform are combined to form a complete physical layer data packet time domain waveform, and the complete physical layer data packet time domain waveform is transmitted to a power line channel for transmission.

The invention discloses a communication device based on a power line and electronic equipment. The communication device comprises a conversion module and a sensor, the conversion module is connected with the input end of the power signal acquisition unit through a power port, the output end of the power signal acquisition unit is connected with the input end of the first processing unit, and the output end of the signal transmitting unit is connected with the second end of the conversion module through an output port; the power supply signal acquisition unit acquires a first serial port signal and transmits the first serial port signal to the first processing unit, the first serial port signal generates a second serial port signal after passing through the first processing unit and transmits the second serial port signal to the signal emission unit, and the signal emission unit transmits the second serial port signal to the conversion module through an output port; and the conversion module sends the second serial port signal to the user side. According to the communication device provided by the invention, the power supply port and the output port are multiplexed as the communication port, a communication function can be completed through an original power supply circuit, a communication chip does not need to be installed in the sensor, and the technical adaptation cost is greatly reduced.

This application provides a communication method and apparatus, relating to the field of communication technology. In this communication method, the beacon period includes N synchronization periods, where N is an integer greater than 4. A first communication device can transmit control frames during a time period within the first synchronization period of the N synchronization periods. Because the beacon period is divided more finely, the time interval between control frame transmissions by the first communication device is shorter, which helps reduce the latency of control frame transmission. Furthermore, the first communication device has more opportunities to transmit control frames within a beacon period, which helps improve the success rate of control frame transmission.

In an embodiment, a current source is coupled to a first current terminal of a switch, the second current terminal of which is coupled to a first data line in a communication system. An edge detector has a first input, a second input, and an output, in which the first input is coupled to a second data line in the communication system, the second input is coupled to the first data line, and the output is coupled to a control terminal of the switch. The first and second data lines may be positive and negative data lines, respectively, of the communication system.

The invention provides a multipath signal fusion receiving method and system based on power line carrier communication. The method comprises the following steps: acquiring a power line original signal of a power line carrier, and performing time-frequency analysis on the power line original signal; acquiring an electric power time-frequency diagram, mapping the electric power time-frequency diagram into a time-frequency grid energy diagram sequence, inputting the time-frequency grid energy diagram sequence into the liquid time constant network, and acquiring an electric power pulse tensor; integrating the electric power pulse tensor to obtain an electric power pulse density map sequence, and constructing an optical flow constraint equation through the electric power pulse density map sequence; according to an optical flow method, an optical flow constraint equation is solved, an electric power optical flow field is obtained, and the size of a window is dynamically adjusted, so that the multipath trajectory positioning error is reduced, the multipath trajectory positioning accuracy is improved, trajectory association is performed on the electric power optical flow field to obtain multipath trajectories, and the multipath trajectories are fused to obtain an electric power fusion signal. Through the method, the reliability and the stability of power line carrier communication are improved.

The invention provides a power line carrier communication method and device based on adaptive bit power allocation, and the method comprises the steps: determining the channel frequency response and noise power of each OFDM subcarrier according to a preset signal transmitted to a target electric energy meter and a receiving signal received by the target electric energy meter on each OFDM subcarrier, and transmitting the channel frequency response and noise power to the target electric energy meter; according to the method, the optimal activation subcarrier number with a good communication effect and the most appropriate optimal power allocation reference value are screened out through channel frequency response and noise power, and then target power and bit number are configured for each optimal activation subcarrier. According to the method, the OFDM subcarriers with better communication performance can be selected from the plurality of OFDM subcarriers, and then proper power and bit number are configured for each OFDM subcarrier, so that the data to be transmitted can be modulated to each optimal activation subcarrier to communicate with the target electric energy meter according to the target power and bit number. Therefore, the communication quality of the intelligent acquisition terminal is improved, and the probability of communication interruption is reduced.

The application is suitable for the technical field of data transmission, and provides a dual-mode communication method and equipment applied to a power grid system, including: obtaining scene information of a communication scene where a power device is located; introducing the scene information into a preset impedance calibration model to determine a first operation parameter corresponding to the power device and a second operation parameter corresponding to a relay conversion module; the first operation parameter includes carrier information used for transmitting power data; the first operation parameter is sent to the power device, so that the power device sends a carrier signal used for transmitting power data matched with the first operation parameter at a sending time; when the carrier signal is transmitted to the relay conversion module, the relay conversion module is controlled to perform signal processing on the carrier signal based on the second operation parameter, and the calibrated carrier signal is forwarded. The above method can provide stable and high-speed data transmission and improve the anti-interference capability.

The application relates to the technical field of underwater communication and signal processing, and provides an anti-interference method for underwater power carrier communication, which comprises the following steps: acquiring a power carrier time-frequency signal received by an SRM and synchronously collecting a control instruction stream, wherein the power carrier time-frequency signal is an OFDM signal; determining a state perception weight matrix based on a relay action time window, wherein the relay action time window is determined based on the control instruction stream; determining a joint optimization problem provided with a phase distortion correction operator based on the power carrier time-frequency signal, the state perception weight matrix and a frequency domain confidence matrix in combination with a double-weighted robust principal component analysis algorithm, wherein the frequency domain confidence matrix is determined based on the high-frequency attenuation characteristics of an underwater umbilical cable; and solving the joint optimization problem based on a linearized alternating direction multiplier method to determine a target power carrier signal. The application solves the problem that reliable communication cannot be realized under the double constraints of strong interference and severe phase jitter in the related art.

The application relates to a power line carrier target data modulation method and device, a storage medium and a chip. The method corrects the signal-to-noise ratio of each resource group based on a preset diversity number, then determines the bit number of each to-be-transmitted symbol sent based on the corrected signal-to-noise ratio, then calculates the to-be-transmitted symbol number according to the bit number of target data and the preset diversity number, and finally modulates the target data based on the modulation mode corresponding to the minimum to-be-transmitted symbol number and the preset diversity number by comparing the to-be-transmitted symbol numbers under different preset diversity numbers. The application dynamically adjusts the resource group configuration parameters according to the signal-to-noise ratio of each resource group, thereby adapting to the change of a channel condition, improving a communication rate and a communication success rate.

The utility model discloses an environmental illuminance sensor, comprising an illuminance sensor housing, an illuminance detection module embedded on the front surface of the illuminance sensor housing, a battery compartment arranged on one side of the illuminance sensor housing, a built-in battery placed in the battery compartment, an insertion mounting groove arranged on the front surface of the illuminance sensor housing, and a power supply arranged in the insertion mounting groove. A plugging installation groove is formed in one side of the illuminance sensor shell, a sealing plate is slidably installed in the plugging installation groove, an external antenna is fixedly connected to the other side of the illuminance sensor shell, a cable connector is fixedly connected to the external antenna, a plugging groove is formed in the cable connector, a limiting clamping groove is formed in the inner wall of the plugging groove, and fixing feet are symmetrically and fixedly connected to the upper face and the lower face of the illuminance sensor shell. Through mutual cooperation of the external antenna and the plug assembly, cable transmission or wireless signal transmission data can be selected according to specific requirements of a user, a proper signal transmission mode can be selected according to specific use scenes of the user, and the applicability is higher.