739 results about "Fiber-optic communication" patented technology

The invention relates to the technical field of optical fiber communication monitoring, in particular to a passive optical fiber multi-parameter digital twin drive abnormal root cause positioning method and system. Collecting temperature, stress, acoustics and polarization signals, and constructing a time domain, frequency domain and energy domain coupling feature tensor and time sequence data set; performing nonlinear dimension reduction and feature decoupling by using a beta-VAE model, and dynamically quantifying contribution of each parameter to anomaly by using an integral gradient to form a contribution degree vector group; constructing a PINN digital twinborn model embedded with heat conduction and elasto-optical effects, and predicting a normal fluctuation range under contribution vector weighting and data-physics dual constraints; modeling measurement and prediction deviations under the guidance of contribution vectors, and outputting an abnormal measurement score, confidence, a position and a time sequence; and a causal graph neural network is constructed, topology and abnormal events are fused for tracing causes, a fault source is identified, and the model is subjected to closed-loop calibration. According to the invention, data driving and a physical mechanism are fused, and accurate detection and root cause positioning of the abnormity of the optical fiber system are realized.

The invention provides a hollow-core optical fiber cable fiber breakage detection method based on a reference optical fiber and an optical cable, and belongs to the technical field of optical fiber communication. The method comprises the following steps: acquiring monitoring data of a reference optical fiber in a hollow-core optical fiber cable, and performing quality evaluation on the data to generate a signal quality comprehensive score; when the score is higher than a preset threshold value, feature extraction and dynamic weighted fusion are carried out to generate a comprehensive feature vector; outputting a fiber breakage probability by using the fiber breakage state recognition model, calculating a fiber breakage risk value through a prediction model in combination with time sequence data, and obtaining a fiber breakage risk index through a risk fusion algorithm; and finally, matching and executing a hierarchical response strategy according to the risk index. According to the invention, multi-modal data fusion, intelligent state identification and active early warning are realized, and the reliability, precision and operation and maintenance efficiency of broken fiber detection are significantly improved.

The invention relates to the technical field of intelligent communication, and discloses an end-to-end optimization method, a signal constellation geometry and probability joint shaping optimization method in an end-to-end intelligent communication system, and a communication device based on a neural network. According to the method, a transmitter is constructed by using a neural network, and a received signal passes through a two-stage equalization processing system to form an end-to-end optimization framework without assistance of a channel model. The transmitter adopts a modular design, can realize joint optimization of constellation probability shaping (PS) and geometric shaping (GS), and performs joint updating on all trainable parameters of the system based on a total loss function containing an equilibrium error and a decoding error through a back propagation algorithm. According to the invention, computing resources are effectively saved; the two-stage equalization system can accurately compensate channel damage, the realized PS and GS joint optimization can significantly improve the performance of the communication system and reduce the bit error rate, and the method has good performance advantages and practical value in an actual optical fiber communication system.

Disclosed are systems and methods that employ distributed fiber optic sensing (DFOS) / distributed acoustic sensing (DAS) to monitor and provide real-time estimation of ice thickness on fiber optic communications facilities, and which integrate DSA data with a hybrid processing technique that combines frequency domain decomposition (FDD) and stochastic subspace identification (SSI). Aspects of our innovative systems and methods include: i) Hybrid Signal Processing Techniques; ii) Real-time, Continuous Ice Monitoring; iii) Enhanced Noise Robustness and Non-linear Dynamics Handling; and iv) Adaptability and Scalability.

A fiber optic-based communications network includes: a power insertion device, connected to multiple fiber links from a data source, configured to provide power insertion to a hybrid fiber / power cable connected to at least one fiber link of the multiple fiber links; the hybrid fiber / power cable, connecting the power insertion device to a connection interface device, configured to transmit data and power from the power insertion device to the connection interface device; and the connection interface device, configured to provide an interface for connection to an end device via a power over Ethernet (POE)-compatible connection and to provide optical to electrical media conversion for data transmitted from the power insertion device to an end device via the hybrid fiber / power cable and the PoE-compatible connection.

The invention discloses a relay device and method for long-distance few-mode optical fiber communication, and belongs to the field of optical communication. According to the device, firstly, optical signals transmitted in a few-mode optical fiber are separated into a plurality of independent mode channels through a mode decomposition multiplexer; then, an adjustable light delay unit is configured in each channel, and compensation is carried out according to a difference mode group delay difference pre-calculated or actually measured by a few-mode optical fiber parameter; furthermore, a dimmable amplifier is used for amplifying the signal, power monitoring is carried out at the output end of the amplifier through an optical fiber beam splitter and a photoelectric detector, closed-loop feedback control is formed, and gain of each channel is adjusted in a self-adaptive mode to eliminate mode-dependent loss. According to the invention, signal distortion can be effectively suppressed in an optical domain, the complexity of digital signal processing of a receiving end is reduced, and the transmission distance and the transmission capacity of a few-mode optical fiber mode division multiplexing communication system are remarkably improved.

The invention relates to the technical field of optical fiber communication device detection, and provides an optical fiber connector end face 3D shape detection method and system, and the method comprises the steps: obtaining a multi-step phase shift interference image sequence of an optical fiber connector end face; performing interface segmentation on the multi-step phase shift interference image sequence by adopting a fiber core boundary detection network based on radial gradient perception to obtain interface position data; based on the interface position data and the multi-step phase shift interference image sequence, performing phase unpacking by adopting a dual-coordinate system fusion phase unpacking algorithm to obtain initial phase data; performing global reconstruction on the initial phase data by adopting a regional confidence coefficient weighted reconstruction algorithm to obtain global phase field data; performing spherical parameter fitting on the global phase field data by adopting an IEC (International Electrotechnical Commission) standard constraint hierarchical particle swarm optimization algorithm to obtain spherical geometric parameters; and generating a 3D shape detection result of the end face of the optical fiber connector according to the spherical geometric parameters. According to the invention, the precision and reliability of 3D shape detection of the end face of the optical fiber connector are improved.

The invention relates to the technical field of optical fiber communication, and provides an optical transmission system fault positioning method and device based on digital twinning and a medium. The method comprises the steps that physical models of all parts of the optical transmission system are combined, a neural network model is constructed through monitoring data, and data processing, data fusion and data cleaning technologies are adopted; acquiring performance data during fault simulation by utilizing a single-channel fault, an amplifier fault and an optical fiber fault of the digital twin simulation optical transmission system, matching the simulated fault type and fault degree with the corresponding performance data, and establishing a fault feature database; designing a fault positioning neural network, taking the performance data in the fault feature database as input data, and taking corresponding fault types and fault degrees as output data; when the optical transmission system breaks down, performance data monitored by the system are obtained and input into the trained neural network, and fault positioning is completed.

The invention discloses a cascade architecture power electronic control and protection device and a high-frequency carrier generation method. The cascade architecture power electronic control and protection device comprises a controller, an optical port case and a plurality of power modules, the controller is provided with a high-speed optical fiber communication interface, each optical port case is provided with a high-speed optical port and a plurality of low-speed optical fiber communication interfaces, and the high-speed optical port is connected with the high-speed optical fiber communication interface of the controller through a high-speed optical fiber; each power module is connected with one low-speed optical fiber communication interface through a low-speed optical fiber, and each power module is used for receiving a control signal through the optical port case. The method can be applied to various power electronic products in a butt joint mode, the calculation burden of a controller is reduced, and large-capacity high-frequency carrier processing can be completed without a high-performance controller.

The invention relates to the technical field of optical fiber communication equipment, and discloses an optical fiber splice closure with a positioning function and an application system. The junction box body is composed of a bottom box frame and a top box cover, the top box cover is installed at the top of the bottom box frame through bolts, pipe inlet holes are formed in the two sides of the junction box body, and the pipe inlet holes are used for leading external optical fiber pipes into the junction box body; the bottom box frame is provided with a welding disc, the welding disc is used for connecting optical fiber pipe joints, the top of the welding disc is provided with a low-frequency RFID positioning module, and through the arrangement of the low-frequency RFID positioning module on the optical fiber splice closure, when optical fiber pipe transmission goes wrong, through a positioning management system, the optical fiber splice closure can be accurately positioned. A worker can quickly obtain the position information of the fault junction box and formulate an optimal maintenance route, so that the maintenance efficiency is improved, the network interruption time caused by a fault is reduced, and the stable operation of a communication network is ensured.

The invention belongs to the technical field of high polymer materials, and particularly relates to a fluorescent liquid crystal polyurethane material as well as a preparation method and application thereof. According to the invention, hydroxyl and a flexible spacer-CH2-are introduced to cyanostilbene to synthesize a dihydroxyl-containing cyanostilbene compound as a dihydroxyl fluorescent liquid crystal monomer. A linear polyurethane material is prepared by taking a dihydroxyl fluorescent liquid crystal monomer and diisocyanate as raw materials, and a structural unit of cyanostilbene is directly introduced into a main chain structure of polyurethane in a chemical bonding manner, so that fluorescent / liquid crystal units are uniformly and stably distributed in a polymer main chain; the fluorescent liquid crystal polyurethane material integrating high mechanical property, good processability and stable fluorescence characteristic is obtained. The fluorescent liquid crystal polyurethane material can provide a multifunctional solution in wider fields of data storage, coding anti-counterfeiting, intelligent sensing, flexible electronics, shape memory materials, photoelectric display devices, optical fiber communication, biomedicine and the like.

The invention discloses an optical fiber end-to-end coverage fault positioning system based on passive optical switch cascade, and relates to the related technical field of optical fiber communication fault detection, and the system comprises a mapping construction module which builds a mapping matrix of a switch state and an optical fiber segment based on a preset switch switching sequence; the first identification module is used for injecting probe pulses in different switching states, and inverting local time delay distortion of each section by using a time delay observation set to form a first type of structural characterization; the second identification module is used for collecting the amplitude and phase sequence of the end-to-end signal, calculating the statistical distance between the end-to-end signal and the reference and projecting the statistical distance to the segment-level space to form a second type of structural representation; and the early warning module is used for carrying out damage analysis under multi-source observation and reporting fault abnormity. The technical problem that in the prior art, multiple potential degradation sections in the whole end-to-end process cannot be subjected to synchronous fine fault sensing and positioning is solved, and the technical effects that the health condition of the optical fiber link is sensed in real time through the passive cascade switch network and the fault positioning accuracy is improved are achieved.

The invention provides an eddy current detection micro-vibration signal transmission method and system based on optical fiber sensing. The method comprises the following steps: firstly, forming periodic pressure disturbance in a preset area; secondly, generating a micro-vibration signal based on periodic pressure disturbance; converting the micro-vibration signal into a backscattering light signal; phase demodulation is carried out on the backscattered light signal, and the phase variation is extracted, so that the phase variation corresponds to the dynamic change of the eddy current field; then, according to the incidence relation between the phase variation and the flight parameters of the unmanned aerial vehicle, the phase variation is coded into a digital eddy current characteristic sequence; and finally, transmitting the digital eddy current characteristic sequence to a far-end monitoring platform through an optical fiber communication link so as to complete transmission of the eddy current detection micro-vibration signal. According to the technical scheme provided by the invention, the pertinence and reliability of monitoring are improved, and high-sensitivity detection, accurate feature extraction and reliable remote transmission of micro-vibration signals of an eddy current field are also realized.

The invention discloses an ultra-wideband heterogeneous five-core anti-resonance optical fiber for transmission from ultraviolet to intermediate infrared, and belongs to the technical field of optical fiber communication. The heterogeneous five-core anti-resonance optical fiber sequentially comprises a perfect matching layer, an outer cladding layer, a first light guide unit, a second light guide unit, a third light guide unit, a fourth light guide unit and a fifth light guide unit from outside to inside along the fiber diameter, wherein the first light guide unit, the second light guide unit, the third light guide unit, the fourth light guide unit and the fifth light guide unit are arranged in the outer cladding layer. A plurality of nesting tube assemblies and gap tube assemblies with the same or different structures are arranged in each light guide unit in the circumferential direction at equal intervals, and a central air fiber core area, a left upper air fiber core area, a right lower air fiber core area, a right upper air fiber core area and a left lower air fiber core area are defined by the assemblies and work at the wave bands of 0.15-2.0 m, 2.0-3.0 m, 3.0-4.0 m, 4.0-6.0 m and 6.0-7.0 m correspondingly. And all the components show extremely low restrictive loss, dispersion close to zero and a relatively low nonlinear coefficient.

The invention discloses a high-precision time synchronization method and system based on distributed airborne measurement, and the method comprises the following steps: employing a high-precision atomic clock as a system clock, transmitting the precise clock to slave devices at all levels, achieving the homology and the same frequency of the clock, and guaranteeing the time consistency of the timekeeping process of a local clock; clock and time service data are transmitted through high-speed optical fibers, independent optical fiber communication links are distributed, and the same clock and time service data receiving and transmitting module is used, so that the data transmission and receiving processing time of all levels of equipment in the time service process is fixed, and the fixed time delay can be measured through a specific means. And high-precision time synchronization is finally realized by compensating the fixed time delay. Based on the distributed design of airborne measurement, the index requirements of small design size and high synchronization precision of the master device and the slave device are met, the synchronization precision can reach 10ns, the slave device can be flexibly expanded, and the method is suitable for various distributed measurement systems or measurement and control systems with high requirements on time synchronization precision.

The invention belongs to the technical field of optical fiber communication, and discloses an internal and external optical interconnection architecture of a chip. The chip internal and external optical interconnection framework comprises a printed circuit board, a glass substrate, a chip unit and an external optical interface. The glass substrate is arranged above the printed circuit board, the chip unit is arranged above the glass substrate, and the external optical interface is arranged on the side surface of the glass substrate; a rewiring layer and an optical waveguide are arranged in the glass substrate, and the rewiring layer is arranged below the chip unit; the chip unit comprises a main chip, a storage chip, an electronic integrated chip and a photonic integrated chip; the photonic integrated chip is optically coupled with an external optical interface through an optical waveguide. The invention further provides a manufacturing method of the chip internal and external optical interconnection architecture. The chip internal and external optical interconnection architecture is the chip internal and external optical interconnection architecture. According to the invention, the electrical interconnection distance of high-speed data transmission can be greatly shortened, the transmission rate and the signal quality are improved, and the device power consumption is reduced.

The invention discloses a dimension-level constellation disassembly transmission method based on high-dimensional constellation selective mapping, and belongs to the technical field of optical fiber communication. The method comprises the steps that a traditional high-dimensional constellation is constructed, the number of constellation points needing to be extracted is determined through an entropy limit adaptive tuning function, then needed constellation points are extracted from the traditional high-dimensional constellation, and a shaped high-dimensional constellation is obtained; performing dimension-level disassembly on the shaped high-dimensional constellation to obtain a low-dimensional constellation set; performing phase conversion on the low-dimensional constellation set, and transmitting the converted low-dimensional constellation set to a channel for transmission in a spherical coordinate And receiving the low-dimensional constellation set at a receiving end, combining and restoring the low-dimensional constellation set into a high-dimensional constellation, and performing corresponding judgment on the high-dimensional constellation to obtain bit data. Part of constellation points are selected from a high-dimensional constellation to carry out data bearing and transmission, and the Euclidean distance between the constellation points is increased to reduce the bit error rate. And a high-dimensional constellation is disassembled into a low-dimensional constellation set for transmission in the form of a spherical coordinate system, so that the bit error rate rise caused by relatively large influence of a channel on transmission is avoided.

The invention discloses an optical fiber link physical parameter estimation method based on a multichannel feature input neural operator, and belongs to the technical field of optical fiber communication. The method comprises the following steps: acquiring signals of a transmitting end and a receiving end under different channel parameters, and respectively calculating multiple groups of weighting and observation data corresponding to loss, dispersion and nonlinear effect according to a nonlinear evolution equation for describing optical signal transmission; splicing the observation data and processing the observation data into a high-dimensional complex feature sequence; a frequency domain operator block comprising a parallel complex frequency spectrum and a time domain convolution branch is designed to extract and fuse the features, and aggregation representation of the channel features is obtained through Fourier transform and frequency domain attention pooling; and outputting estimated dispersion and nonlinear real number parameters through a plurality of multi-layer perceptron and a linear projection layer. According to the method, physical priori knowledge of optical fiber transmission is integrated into the deep neural operator, so that the parameter estimation capability and the model generalization performance of long-distance, strong-dispersion and strong-nonlinearity optical fiber links are improved.

The invention relates to the technical field of optical fiber communication monitoring, and discloses an electric power communication line monitoring method and system based on optical fiber multi-source data fusion. The method comprises the following steps: calculating the weight of each data source through a confidence evaluation neural network according to the historical stability and bit error rate variation of each data source, carrying out weighted fusion on each weight and a normalized data feature, calculating a communication service quality correction factor according to a bit error rate and an optical signal-to-noise ratio, and correcting to obtain a line state fusion feature value; when the ratio of the optical fiber signal data weight to the communication performance data weight exceeds a set threshold value, extracting an optical fiber disturbance parameter and an optical power sequence of an adjacent monitoring position, and calculating a compensation disturbance value through optical power weighted least square fitting; and calculating the theoretical optical power variation according to the compensation disturbance value and the optical fiber loss coefficient, and taking the deviation between the theoretical optical power variation and the measured value as a compensation effectiveness criterion. The accuracy and reliability of optical fiber communication line monitoring are improved.

The invention provides a submarine optical cable bidirectional loopback detection device and method based on wavelength division multiplexing, and belongs to the technical field of optical fiber communication precision detection and intelligent analysis. Through the first detection shore station A module, the pulse control processor generates a downlink detection pulse to respectively drive an uplink detection pulse optical signal and a downlink detection pulse optical signal to a main optical fiber; the pulse control processor analyzes the first transmitting and receiving time delay and the first signal attenuation; a second detection shore station B module, wherein the pulse control processor generates an uplink detection pulse; analyzing the second transmitting and receiving time delay and the second signal attenuation, and comparing the first transmitting and receiving time delay and the first signal attenuation; the double-loop module is used for separating, converting and coupling the uplink detection pulse optical signal and the downlink detection pulse optical signal to a main optical fiber for returning; and the intelligent master control processing module is used for measuring the phase of the bidirectional loopback signal and the amplitude change of the loopback signal, detecting and judging whether the uplink signal and the downlink signal are normally received or not, and performing accurate fault positioning and intelligent fault cause analysis and detection by combining with signal time delay.

The invention discloses an optical fiber communication equipment bypass protection method, a bypass protector, equipment and a readable storage medium, and relates to the technical field of optical fiber communication, the optical fiber communication equipment bypass protection method is applied to the bypass protector, and the optical fiber communication equipment bypass protection method comprises the following steps: collecting multi-dimensional data parameters corresponding to target optical fiber equipment; according to the multi-dimensional data parameters, determining degradation rates corresponding to various parameters in the multi-dimensional data parameters and a comprehensive health score of the target optical fiber equipment; and if the parameters lower than the preset alarm threshold value exist and the degradation rate is greater than the preset rate threshold value, or the comprehensive health score is lower than the preset health score threshold value, switching the target optical fiber equipment into a bypass protection state. According to the technical scheme, the bypass protector can actively predict potential faults, bypass switching is executed in advance, the service risk is reduced, and the reliability and service continuity of a network are improved.

This invention discloses a smart composite cable based on modal isolation and its fabrication method. The cable comprises, from the inside out, a power transmission layer, a control signal layer, an optical fiber communication layer, and a smart protection / external shielding layer. The power transmission layer comprises, from the inside out, a conductor layer, conductor insulation, and a first shielding layer for attenuating low-frequency strong magnetic fields. The control signal layer comprises a total shielding layer and multiple control cores uniformly arranged circumferentially between the total shielding layer and the power transmission layer, with each control core having a sub-shielding layer. The optical fiber communication layer comprises multiple optical fiber groups uniformly arranged circumferentially, with each optical fiber group having a second shielding layer for electro-absorption; the second shielding layer is a non-metallic shielding layer. The smart protection / external shielding layer has a third shielding layer for equipotential shielding. This invention employs a layered composite structure to ensure mechanical performance reliability and uses an asymmetric shielding architecture to achieve full-spectrum interference suppression from extremely low frequencies to high frequencies.

The present application relates to optical fiber communication physical connection technology, and discloses an optical fiber connector, comprising a main body, a sleeve ring and a sleeve pipe, the main body is provided with a connecting groove, a guide structure and a guide structure, the sleeve ring is provided with a first connecting part, the guide structure is used for guiding the first connecting part and the connecting groove cooperation, thereby limiting the axial movement between the sleeve ring and the main body, and the sleeve pipe is provided with a matching part, the matching part is matched with the guide structure, thereby limiting the circumferential rotation between the sleeve pipe and the main body, and then the cooperation between the second connecting part on the sleeve ring and the connecting track on the sleeve pipe is utilized, not only the sleeve ring and the sleeve pipe are connected, but also the circumferential rotation between the sleeve ring and the sleeve pipe is limited. Not only the axial and circumferential limiting between the sleeve ring, the sleeve pipe and the main body is realized, the connection stability and connection precision of the optical fiber connector are ensured, but also the assembly of each component in the optical fiber connector is more convenient, and the convenience of the optical fiber connector can be improved.

The application discloses a kind of hollow core optical fiber processing device, method, it is related to hollow core optical fiber communication operation and maintenance technical field, the device includes: airtight packaging shell, preform hollow core optical fiber section, gas interface and ventilation structure, wherein, airtight packaging shell forms closed airtight inner chamber;The first tail fiber section and the second tail fiber section of preform hollow core optical fiber section are carried out hollow core to hollow core fusion with broken fiber, and its optical fiber middle section is arranged in airtight packaging shell, and side wall is provided with ventilation structure, so that the hollow core of preform hollow core optical fiber section is communicated with the inner chamber of airtight packaging shell;Gas interface is arranged in airtight packaging shell and is communicated with its inner chamber, and the inner chamber of airtight packaging shell is pumped or inflated by gas interface, and each gas is exchanged by ventilation structure, to realize the hollow core of preform hollow core optical fiber section and broken fiber is pumped or inflated, so it can effectively solve the problem that pollution removal is difficult after hollow core optical fiber is broken in prior art, and emergency processing efficiency is low.

The invention discloses a multidimensional communication sensing system integrating an optical transmission network and BOTDR / DAS distributed sensing, and relates to the technical field of optical fiber communication and optical fiber sensing. The system comprises an OTN transmission subsystem, an optical fiber link and a BOTDR / DAS fusion sensing subsystem. Wherein the OTN transmission subsystem is used for realizing high-capacity data transmission through an optical fiber link; and the BOTDR / DAS fusion sensing subsystem is used for realizing strain, temperature and vibration distributed measurement of an optical fiber link through a Brillouin scattering and Rayleigh backscattering mechanism. According to the system, a double-self-heterodyne demodulation architecture and a reverse wavelength division multiplexing mechanism are adopted, cooperative demodulation and high-isolation transmission of BOTDR and DAS signals are achieved under the common-fiber condition, and high-speed communication and distributed temperature, strain and vibration synchronous monitoring within the 100 km range can be achieved. According to the method, a technical foundation can be laid for realizing physical layer intelligentization of the in-service power OTN.

The utility model relates to the technical field of optical fiber communication, in particular to an automatic coupling and curing device for optical devices, which comprises a base, a fixed semicircular clamp and a movable semicircular clamp are arranged at the right end of the base and are both of semicircular arc plate-shaped structures, the fixed semicircular clamp is fixedly mounted, and the movable semicircular clamp is rotatably mounted. When the movable semicircular clamp is closed, the movable semicircular clamp and the fixed semicircular clamp form an annular structure and clamp the optical fiber coupler, a control steering engine used for controlling opening and closing of the movable semicircular clamp is installed at the right end of the machine base, a plurality of guide rollers are distributed on the inner side of the fixed semicircular clamp and the inner side of the movable semicircular clamp in an annular array mode, and an electric heating piece is arranged on the circumferential inner wall of the movable semicircular clamp. The electric heating piece heats and solidifies thermosensitive glue filled in the optical fiber coupler, and a rotary translation device is arranged on the fixed semicircular clamp. The utility model provides the novel automatic coupling and curing device for the optical device, which is higher in automation degree and simpler in structure.

The application relates to an incoming cable fixing assembly and a use method, and relates to the technical field of optical fiber communication. The incoming cable fixing assembly comprises a base provided with an opening for clamping an optical cable on one side, and further provided with a receiving groove in the base; and an optical cable fixing structure fixed in the receiving groove, wherein the optical cable fixing structure comprises two clamping ends arranged at intervals, the two clamping ends extend out of the receiving groove to form a clamping area in communication with the opening and used for clamping the optical cable. The application is simple to install and disassemble, has strong compatibility, and can be disassembled and replaced while ensuring stability.

This invention relates to the field of optical fiber communication technology, and more particularly to a method and system for improving the signal quality of optical fiber communication based on adaptive compensation. The method performs joint time-domain and frequency-domain analysis on the optical signal to be processed, extracts distortion characteristic parameters, and maps them to a set of compensation coefficients to construct a compensation function for inverse signal compensation. By evaluating the quality of the compensated signal and comparing it with a preset benchmark, the mapping rules of the compensation coefficients are dynamically adjusted, achieving adaptive and precise compensation for the nonlinearity and dispersion effects of the transmission medium, effectively improving signal quality and system performance.

The application discloses a communication method, device, system and train, relates to the field of optical fiber communication, and is applied to a processor in any compartment of a train, wherein the processor is connected with an optical fiber ring network, the processor and train communication equipment in the compartment perform communication data interaction, and then the processor and the optical fiber ring network perform communication data interaction in the form of optical signals, so that the train communication equipment in different compartments can communicate with each other. The communication data is not easy to be lost and is not easy to be affected by electromagnetic interference through the mode of data transmission by optical fibers instead of cables, so that the communication quality of the train communication equipment is improved. Moreover, the communication data of multiple train communication equipments is converted into optical signals and transmitted in the form of a bundle of light, so that multiple communication networks are not needed, and only one optical fiber ring network can realize data transmission of multiple train communication equipments at the same time, so that the complexity of the wiring environment in the train is reduced, and the total weight of the train is reduced.