34results about "Transmission control/equlisation" patented technology

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 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.

This invention relates to the field of smart meter communication data acquisition technology, and discloses a method for anti-interference data acquisition in smart meter communication based on multi-carrier modulation technology. The method includes using multi-carrier modulation to perform frequency division processing on the signal during data transmission, combining channel state perception and dynamic subcarrier allocation strategies to avoid interference frequency bands in real time, and enhancing data robustness through time-frequency joint coding. This application can effectively suppress narrowband interference and impulse noise, improving the communication reliability and data acquisition accuracy of smart meters in complex electromagnetic environments.

This invention discloses a multi-band transmission control method for power line communication networks, belonging to the field of communication technology. The method includes: the power line communication network having at least one new transformer substation and one old substation; communication nodes in the new substation support communication on newly added frequency bands, while communication nodes in the old substation only support communication on existing frequency bands; when communication nodes in the new substation need to communicate on the newly added frequency band, and the newly added frequency band overlaps with the existing frequency band, the transmission strategy of the target communication node enabling communication on the newly added frequency band is adjusted, including: restricting the target communication node from executing an adaptive transmission strategy based on the channel detection results of the newly added frequency band; and adjusting the signal transmission mode of the target communication node on the newly added frequency band to a low-speed transmission mode. This invention improves the communication reliability and transmission success rate of power line carrier signals in newly added frequency bands where new and old substations coexist.

The equalizer stage circuit includes a first transistor and a second transistor arranged in a differential configuration. The equalizer stage circuit also includes a first selectable path. The first selectable path includes a high-frequency section comprising a first terminal coupled to the emitter or source of the first transistor, a second terminal coupled to the emitter or source of the second transistor, and a first plurality of high-frequency RC time constant elements connected in parallel between the first and second terminals, and a low-frequency section comprising a first capacitor coupled to the first terminal, a second capacitor coupled to the second terminal, and a second plurality of low-frequency RC time constant elements connected between the first and second capacitors.

The application discloses a power line carrier network management emergency system and method combined with power frequency communication, and the power line carrier network management emergency system combined with power frequency communication comprises a carrier controller and a plurality of levels of routing nodes, in each level of adjacent routing nodes, a routing node relatively close to the carrier controller is arranged as a higher-level routing node, and a routing node relatively far away from the carrier controller is arranged as a lower-level routing node, and each level of routing nodes comprises a plurality of carrier sub-nodes. The power line carrier network management emergency system and method combined with power frequency communication disclosed by the application combine power frequency communication with power line carrier communication, utilize a power frequency communication channel as a network management channel, bear network state management, configuration management and fault management information and the like, realize separation of the network management channel and a service communication channel, and have the advantages of high reliability, fast fault diagnosis and the like.

This communication circuit includes an output equalization processing unit, a reference equalization processing unit, and a coefficient setting unit, and transmits and receives communication signals to and from another device through a cable during a steady operation period. The output equalization processing unit performs equalization processing on the communication signal transmitted by the other device on the basis of an equalization coefficient that has been set. The reference equalization processing unit equalizes the communication signal transmitted by the other device. The coefficient setting unit calculates an equalization coefficient on the basis of the communication signal equalized by the output equalization processing unit and the communication signal equalized by the reference equalization processing unit, and updates the equalization coefficient set in the output equalization processing unit to the calculated equalization coefficient.

A frequency equalizer is provided. The frequency equalizer includes a coupler including a main segment extending between a first port and a second port and a coupled segment disposed in a coupling relationship with the main segment and extending between a third port and a fourth port. The frequency equalizer further includes a first thermistor electrically coupled in series between the first port and an input line, a second thermistor electrically coupled in series between the second port and an output line, and a first shunt resistor coupled across the third port. The frequency equalizer simultaneously provides frequency equalization and temperature compensation for signals transmitted through the frequency equalizer.

The application relates to the technical field of power line carrier communication, and discloses a power line carrier signal pulse noise processing method and device and communication equipment, the method comprising the following steps: slidingly buffering a time domain signal collected at a current sampling point into a first buffer window; judging whether there are continuous target time domain signals of a first preset number on any side of a first target buffer position, the target time domain signal being a time domain signal with a signal intensity greater than or equal to a preset threshold; according to a first judgment result, determining whether to slide the time domain signal output by the first target buffer position into a second buffer window, the length of the second buffer window being smaller than the length of the second buffer window; judging whether there are continuous target time domain signals of a second preset number on any side of a second target buffer position, the second preset number being smaller than the first preset number; and according to a second judgment result, processing the time domain signal output by the second target buffer position. The application can reduce misjudgment and improve signal quality.

Examples relate to a receiver termination detection circuit for wireline datalinks. A transmitter circuit includes positive and negative output nodes coupled through a channel to a receiver. A detection circuit comprises programmable pull-up and pull-down resistors coupled to the output nodes, and voltage comparators with independent reference voltage inputs. A mode selection input selects between single-ended and differential detection modes. Control logic drives the output nodes concurrently in single-ended mode and differentially in differential mode. The comparator outputs are sampled after a programmable time delay to detect receiver termination. The circuit supports both AC-coupled single-ended and DC-coupled differential termination detection while maintaining common-mode voltage during transitions to normal operation.

Participant station (10; 30; 50; 60) for a bus system (1; 2), with a transmitting / receiving device (13) for transmitting a signal via the bus system (1; 2) to another subscriber station and for receiving a signal via the bus system (1; 2), in which at least temporarily exclusive, collision-free access of a subscriber station (10, 20, 30, 50, 60) to a bus line (40) of the bus system (1; 2) is ensured, and a modification device (12; 14) for modifying the transmission characteristics of a transmit path (131) of the transmit / receive device (13) and / or the receiving characteristics of a receive path (132) of the transmit / receive device (13), wherein the modification device (14) comprises a transmitter output stage (150) for pre-distortion of the signal to be transmitted by the transmit / receive device (13) in order to prevent the bus level from settling on a transmit channel within one clock cycle (T S) of the signal to be sent, and / or wherein the modification device (12) is a receiver modification device for changing the detection time (TD) to the right in the eye diagram and the decision threshold (E) upwards in the eye diagram, wherein the transmitter output stage (150) for pre-distortion of the signal to be transmitted by the transmit / receive device (13) is designed such that it adapts the transmitter characteristics of the subscriber station (50; 60) depending on the section of a frame of the bus system (2).

The application belongs to the technical field of primary and secondary fusion fault processing in the power industry, and particularly relates to a FA fault processing method based on a medium voltage carrier communication system and application. One carrier master is arranged in one line, an FTU and the carrier master share one chip, a carrier machine separately uses one chip, the carrier machines communicate through 10kv power lines, and line topologies have been sent to each carrier machine; the FTU detects a fault and transmits fault information to the carrier machine; after receiving the fault information, a carrier machine occupies the host position; a cutting machine is cut off; an isolation machine is isolated; the carrier machine reports all information related to the FA on the line to the carrier master, and the carrier master reports all FA information to a main station. The application is based on a medium voltage carrier communication system, optimizes a FA fault processing flow, provides an efficient, low-cost and high-system-reliability FA fault processing method, and the method can adapt to various topological structures and has rich application scenarios.

The present disclosure relates to a communication method, device, system, medium, product and chip system, the method comprising: sending first data to a controlled device, wherein the first data contains a behavior identifier, the first data is used to instruct the controlled device to perform the behavior indicated by the behavior identifier, and the controlled device is a power line carrier communication (PLC) device; wherein the behavior indicated by the behavior identifier does not require the controlled device to return a response message. Thus, in the interaction process between the control device and the controlled device, the control of the controlled device can be realized through the behavior identifier, so that the control device does not need to return a response message after performing the behavior, which can realize the control of the controlled device and save the communication resources occupied by the response message.

To provide a distributed antenna system device that can eliminate interference caused by upstream signals leaking into downstream signals and control TDD timing more accurately.SOLUTION: A distributed antenna system device includes: a circulator 101 which outputs a downlink signal from a higher-level device to a downlink signal processing unit, and controls so as to output an uplink signal from an uplink signal processing unit to the higher-level device; an uplink signal leakage cancellation unit 111 that inputs the downlink signal from the circulator 101 and the uplink signal from the uplink signal processing unit, cancels a sneak path of the uplink signal contained in the downlink signal, and outputs the cancelled signal; and a TDD detection unit 107 that detects the timing of time division duplexing on the basis of the cancelled signal.SELECTED DRAWING: Figure 1

The present application relates to the field of data processing, more particularly, the present application relates to a smart meter signal enhancement method and system based on reinforcement learning, the method comprising: collecting the history and current noisy carrier signal of the meter and the history noise-free reference signal; based on the adaptive division of the frequency band of the signal spectrum difference; for each frequency band, calculate the reward participation; the candidate filter action is applied to the current signal, and the time domain and frequency domain enhancement effect value of each frequency band is calculated; based on the reward participation, the two-dimensional effect value is weighted and summed and the action complexity penalty is deducted to obtain the adaptive reward function value; combined with the discounted reward obtained by the future state prediction model, the comprehensive return value is calculated to determine the optimal filter action vector, and finally the signal enhancement is realized. The present application effectively avoids the signal distortion problem caused by the traditional overall signal-to-noise ratio evaluation, and significantly improves the reliability and signal fidelity of the power line carrier communication.

This application discloses a carrier communication circuit, chip, and system. The carrier communication circuit includes: a low-voltage power supply line, a signal modulation circuit, a power bus, and a signal demodulation circuit. One end of the signal modulation circuit is connected to the low-voltage power supply line, and the other end is connected to the power bus. The signal modulation circuit receives an external input signal and a carrier signal, and modulates the input signal into a first modulation signal. One end of the signal demodulation circuit is connected to the power bus, and the other end is connected to the low-voltage power supply line. The signal demodulation circuit demodulates the second modulation signal received from the power bus into an output signal. The technical solution provided by this application can achieve bidirectional data communication between devices without changing the connection status of the device's power supply line.

Provided in the present application are a communication method and apparatus. The method comprises: acquiring a first weight, wherein the first weight may be determined on the basis of a sounding reference signal; receiving first information, wherein the first information may be used for indicating a second weight related to a downlink precoding matrix indication; receiving second information, wherein the second information may be used for indicating a determination mode for a third weight, and the third weight is used for downlink precoding; and in response to the determination mode for the third weight, determining the third weight on the basis of the first weight and / or the second weight. In the present application, the downlink precoding matrix indication is used as one of reference factors for determining a downlink precoding weight, such that a network device can flexibly select a determination mode for the downlink precoding weight on the basis of actual situations, thereby improving the accuracy of downlink precoding weights and the efficiency of data transmission.

An intelligent charging management system for electric vehicles includes: a distribution network master station system; a transformer substation, which is equipped with an intelligent communication management agent module and a first dual-mode communication module; and an intelligent charging pile, which includes a main controller, a second dual-mode communication module, a power quality monitoring circuit, and a power electronic switch. The dual-mode communication module is a PLC and wireless communication dual-mode communication module, which is equipped with a PINSF (Power Line Impulse Noise Filter). The communication process between the dual-mode communication modules includes a pilot training phase and a data transmission phase. In the pilot training phase, the PINSF acts as a channel estimator for channel estimation. In the data transmission phase, the PINSF acts as a channel equalizer for channel equalization. This invention is specifically optimized for low-voltage power line impulse noise environments. By using the PINSF, it suppresses the interference of impulse noise on channel estimation and equalization, ensuring the demodulation performance and communication reliability of the communication system.

Embodiments of the present application provide a communication method and device, which can reduce the data amount of channel estimation information. The method can include: sending channel estimation information, the channel estimation information being used to indicate a channel estimation result of each subcarrier group in at least one subcarrier group, wherein the at least one subcarrier group is obtained by grouping at least one subcarrier, and the channel estimation result of each subcarrier group is obtained based on a channel estimation result of at least one subcarrier in the each subcarrier group; and receiving data packets on the at least one subcarrier based on the channel estimation information.

The application discloses a communication method, device and system based on PLC technology, relates to the technical field of communication, and can realize accurate and timely transmission of signals in a PLC scene and improve the success rate of signal transmission.In the scheme, the PLC host can negotiate with the master nodes of multiple PLC loops to make the multiple PLC loops work in different frequency bands (such as non-overlapping frequency bands), so as to prevent problems such as data packet errors and bit errors caused by mutual interference between the PLC loops, avoid the problem of incorrect loop entry of PLC sub-devices, and improve the reliability of communication of the PLC sub-devices in each PLC loop.In addition, since the working frequency bands of the multiple PLC loops are determined through negotiation, the scheme can support flexible allocation of the working frequency bands of the PLC loops, especially in the case that the number of PLC sub-devices is large and the network is complex, can maximally avoid the problem of spatial crosstalk, and guarantees the accuracy and timeliness of signal transmission.

The present disclosure relates to a communication crosstalk suppression method and a communication system. The method comprises: during communication crosstalk suppression, first acquiring communication state data of a target network, and, on the basis of the communication state data, determining whether crosstalk exists between the target network and other networks; when crosstalk exists between the target network and other networks, adjusting a communication signal of the target network on the basis of a first signal adjustment mode, and synchronously acquiring a communication quality parameter after signal adjustment; and if the communication quality parameter after communication signal adjustment does not satisfy a preset communication condition, adjusting the communication signal on the basis of a second signal adjustment mode. The first signal adjustment mode and the second signal adjustment mode are different adjustment modes.

This disclosure aims to improve error correction capability when compensating for nonlinear distortion in a modulated signal, particularly at low modulation orders, by avoiding unnecessary distortion compensation processing and, conversely, not introducing nonlinear distortion. [Solution] In this disclosure, the equalizer 4 provided in the receiving device R controls the degree of freedom for compensating for the nonlinear distortion of the modulated signal to be lower as the modulation order of the modulated signal decreases, and controls the degree of freedom for compensating for the nonlinear distortion of the modulated signal to be higher as the modulation order of the modulated signal increases.

The invention relates to an optical light guide system comprising an interface for coupling in data and / or an interface for decoupling data and at least a first data channel for transmitting data, and a method for transmitting data in an optical system, comprising the following steps: coupling in data into an interface of a light beam guiding element; transmitting data by means of a first and / or a second data channel arranged within the light beam guiding element (or housing), wherein the data channel can also be used for partial monitoring of the light beam guiding element; decoupling the data from the interface.

This application provides a massive data download device for an acoustic underwater glider swarm, comprising: a storage module located inside the acoustic underwater glider, used to store signals from acoustic sensors when the glider is operating underwater, and to provide data externally when the glider is downloading data; a swarm management module, used to transmit control commands to multiple storage modules, read data from each storage module and transmit it to the control module; and a control module, used to receive user control commands, control the operating status of the storage modules, and read and save data from the storage modules. A downlink cable is used for electrical connection between the swarm management module and the storage modules; and an uplink cable is used for electrical connection between the swarm management module and the control module. The advantages of this application are: operators only need simple cable connections to quickly export massive amounts of data from multiple acoustic underwater gliders, avoiding the watertight risks associated with repeated opening and closing of the glider compartments, and improving operational flexibility and safety.

The application discloses a kind of carrier communication channel frequency selective research methods based on impedance analysis, and its technical scheme includes: step 1, power topology information survey and record such as transformer station line length, branch quantity, meter box user number range;Step 2, according to transformer station transformer specification, determine transformer equivalent impedance model;Step 3, according to the user number range information of transformer station meter box, the user load impedance model of each meter box position is randomly exported;Step 4, based on the impedance differential model of transmission line that actual transformer station transmission line parameter establishes;Step 5, the transformer equivalent impedance model of transformer station, user load impedance model, transmission line impedance differential model is substituted into two-port network transmission matrix model, and the channel frequency selection characteristic in 0.7MHz-12MHz frequency band between any two nodes of transformer station is calculated, for predicting the frequency selection characteristic between any two nodes of transformer station, can solve the problem that frequency selection characteristic between two nodes cannot be obtained by acquisition equipment due to noise or excessive attenuation.

This invention provides a method, apparatus, and device for processing emergency broadcast signals, relating to the field of communication processing technology. The method includes: acquiring an emergency broadcast signal in a first frequency band to be propagated, wherein the emergency broadcast signal in the first frequency band includes at least one piece of information to be propagated; filtering the emergency broadcast signal in the first frequency band to obtain a target purified signal; performing at least two frequency conversions on the target purified signal to obtain a second frequency band signal supported by a passive indoor distribution system; merging the second frequency band signal with a public network signal within the passive indoor distribution system to obtain a merged target transmission signal; and evenly distributing the target transmission signal to multiple preset transmission branch links, and transmitting it through the multiple preset transmission branch links to a receiving end in a corresponding preset target area for parsing to obtain the corresponding information to be propagated. The solution of this invention achieves stable transmission of FM emergency broadcast signals in a passive indoor distribution system.

Dielectric waveguide data interface and sensor system, comprising a dielectric waveguide and a radio transceiver attached to a first end of the dielectric waveguide. The radio transceiver comprises an electronic circuit, configured to generate a radar signal and / or a communication signal, and a coupling element, configured to couple the radar signal and / or the communication signal into the dielectric waveguide.

The application discloses a power line carrier communication system and method based on an extended frequency band, and relates to the technical field of power line carrier communication; and is used for solving the problems of low spectrum efficiency and insufficient communication rate caused by the fixed frequency band configuration of the existing low-voltage area carrier communication; the application comprises a concentrator, a channel detection module, a frequency band selection module, a path planning module and a dynamic loading unit arranged in a communication node; the channel detection module extracts characteristic parameters such as background noise, interference intensity and link attenuation of the communication node in each frequency band; the frequency band selection module calculates the theoretical maximum rate of each frequency band based on a Shannon formula to obtain prior coefficients of each frequency band; the path planning module selects an optimal frequency band and a transmission path for a data transmission task in combination with real-time load information and the prior coefficients; and the dynamic loading unit dynamically adjusts the modulation order and the transmission power in the selected frequency band according to real-time subcarrier level channel states; and the application realizes adaptive selection of the frequency band and dynamic loading of bits.

The application discloses a low-voltage power line communication deviation correction and master selection method and device, equipment and a storage medium, and is used for solving the technical problem of low low-voltage power line communication deviation correction and master selection efficiency. The method comprises the following steps: after a node group is powered on and is in silence for the same time, nodes occupying a low-voltage power line channel are taken as master nodes, and nodes other than the master nodes are determined as child nodes; a master node broadcasts a master selection beacon frame, and the number of broadcastings of the master selection beacon frame is counted; a preamble sequence is used to correct the frequency offset of the child nodes, and a corrected frequency is obtained; whether the child nodes after the correction of the frequency offset can correctly analyze frame control information is judged according to the corrected frequency; if yes, the child nodes after the correction of the frequency offset are exited from a frequency offset correction process; whether the number of broadcastings reaches an expected number is judged; if no, the step of taking the nodes occupying the low-voltage power line channel as the master nodes and determining the nodes other than the master nodes as the child nodes is returned; and if yes, the current master node is determined as an in-network master node.

A terahertz carrier sending apparatus and a terahertz carrier receiving apparatus include a feed transmission line configured to receive an electrical signal sent by a radio frequency sending circuit. A mode excitation structure is configured to excite a terahertz signal. A mode conversion structure includes an inner cavity whose inner wall is metal. The feed transmission line and the mode excitation structure are fastened to a circuit board. The mode conversion structure further includes a positioning slot. A part of the circuit board and the mode excitation structure are inserted into the inner cavity of the mode conversion structure. A plurality of metal through holes are distributed on both a first side and a second side of the mode excitation structure. A boundary of the positioning slot is metal and press-fitted on the metal through holes on both the first side and the second side.