337 results about "Forward error correction" patented technology

The invention discloses an adaptive modulation anti-multipath unmanned aerial vehicle swarm communication method and system based on MIMO-OFDM, and relates to the technical field of wireless communication, and the method comprises the steps: receiving a down-conversion baseband; synchronization and compensation are carried out; removing a cyclic prefix and carrying out fast Fourier transform; estimating a channel and noise on the training and pilot frequency, and correcting a common phase; performing frequency domain equalization and soft decision, forward error correction and cyclic redundancy check according to the estimation to obtain a control parameter, decoding a payload according to the control parameter, and performing statistics to form a link quality indication; modulating coding, bandwidth and spatial mode, configuring mapping, power and weight, and packaging physical layer protocol data; carrier sensing conflict avoiding sending, confirmation and retry are adopted to generate media access statistics; and the routing selects the next-hop multi-hop forwarding according to the transmission quality, and performs end-to-end statistics and recharge. Through cooperation of hierarchical synchronization and phase correction with cyclic prefix and FFT, crosstalk is suppressed, channel noise scale optimization soft decision is robust, data decoupling is controlled, and end-to-end availability is improved through multi-hop self-healing recharge.

A system for detecting service interruptions in a cable broadband network using telemetry-based anomaly detection, wherein the system comprises the following: a telemetry acquisition unit configured to acquire multi-parameter telemetry data from heterogeneous broadband infrastructure elements, including cable modems, amplifiers, optical nodes and cable modem termination systems (CMTS), wherein the telemetry data includes the signal-to-noise ratio, modulation error ratio, forward error correction counter, power levels and latency statistics; a preprocessing and harmonization module that is operationally coupled with the telemetry acquisition unit, wherein the module is configured to normalize heterogeneous telemetry streams by adjusting sampling rates, synchronizing timestamps, interpolating missing data, and filtering out false outliers; an anomaly detection unit that is communicatively connected to the preprocessing and harmonization module, wherein the unit comprises a hybrid detection framework with statistical prediction models and machine learning models, wherein the statistical prediction models include ARIMA or Holt-Winters models to predict the expected telemetry behavior and the machine learning models include recurrent neural networks and autoencoders trained on historical telemetry; an ensemble evaluation subsystem within the anomaly detection unit, configured to combine the outputs of the statistical prediction models and the machine learning models to generate anomaly probability evaluations with adaptive confidence intervals; an interruption classification module configured to receive anomaly probability values ​​and correlate anomalies across multiple devices, geographic clusters, and time windows, wherein the interruption classification module differentiates between transient anomalies and service-impairing interruptions based on a multidimensional correlation; and an alerting interface configured to transmit outage alerts with severity, root cause metadata, and geolocation to a network management system so that the operator can intervene.

The invention discloses a reliable communication system based on a publishing and subscribing mode in a satellite-ground weak network environment, and aims to solve the problems of high round-trip delay, limited link bandwidth, high instantaneous packet loss rate, easiness in blocking and switching influence of links and the like in a data transmission process between a low-orbit satellite and a ground station. A publishing and subscribing model is introduced into an application layer to realize service logic decoupling, deep fusion with an underlying enhanced QUIC transmission protocol is realized, and mechanisms such as message persistence, breakpoint resume, forward error correction and connection migration are combined, so that stable, orderly, complete and safe transmission of service data can still be ensured under the conditions of link instability, quality fluctuation and communication interruption, and the service data transmission efficiency is improved. And high availability and continuity of a satellite-ground communication task under a weak network condition are realized.

The invention discloses a multidirectional frame audio stream transmission method, device, equipment and medium, and the method is realized through cooperation of a transmitting end and a receiving end: the transmitting end cuts an original audio stream into independent audio frames, gives priority identifiers to the independent audio frames, and determines redundant coding parameters and transmission paths for different priority frames in combination with a predefined static strategy; generating a data packet containing an original data block and a redundant data block, and sending the data packet through at least one network path; and a receiving end caches the multi-path data packet, recovers lost data by using redundant data blocks to recombine a complete audio frame, and executes error concealment processing on the frame which cannot be recombined to generate a replacement frame. According to the method, based on a multi-path parallel transmission, forward error correction (FEC) redundancy mechanism and a cost-aware static scheduling strategy, lossless forwarding and instantaneous recovery of audio streams are realized on the premise of not waiting for network feedback and avoiding inter-frame dependence, and high-quality real-time audio transmission service can still be provided in a complex network environment.

The invention discloses a method for aggregating ocean buoy data, which comprises the following steps of: establishing a space-time correlation model according to the spatial distribution density of buoy clusters and the dynamic characteristics of an ocean environment, and adaptively dividing buoy groups with a data compression cooperative relationship; performing a data-related compression operation within the buoy group; constructing a transmission priority dynamic sorting engine, and calculating a dynamic weight coefficient; performing hierarchical packaging processing on the differential coding data, distributing enhanced forward error correction coding resources for high-priority data, and reserving redundant transmission time slots; the method comprises the following steps: receiving a hierarchical data packet through a low-orbit satellite and executing on-satellite preprocessing, reconstructing an original data stream by using a distributed decoder, and meanwhile, fusing multi-dimensional space-time related data to generate an aggregated data product; and finally, the aggregated data product is transmitted to a ground data center through a satellite downlink. According to the invention, uplink data volume is reduced, disaster monitoring timeliness is improved, ground station processing load is reduced, and system environment adaptability is enhanced.

There is provided a method in a node of a wireless communication network. The method comprises receiving from an application a protocol data unit (PDU) set corresponding to an encoded application data unit (ADU). The method further comprises determining an Application-Layer Forward Error Correction (AL-FEC) coding configuration associated with the encoded ADU and transmitting the PDU set. The method further comprises determining whether a cease criterion is satisfied, wherein the cease criterion is based on the AL-FEC coding configuration, and ceasing transmission of the PDU set based on the cease criterion being satisfied.

The invention discloses a 10kV medium-voltage power distribution network power line carrier communication method and system based on adaptive OFDM (Orthogonal Frequency Division Multiplexing), and the method comprises the steps that a master station sends a detection frame to a slave station, and the slave station carries out the CE (Channel Estimation), and obtains the CSI (Channel State Information); the method comprises the following steps of: dividing a broadband channel into a plurality of parallel orthogonal subcarriers, and dynamically allocating a modulation mode, a modulation order and a forward error correction (FEC) coding rate for each subcarrier of OFDM (Orthogonal Frequency Division Multiplexing) by adopting a water injection algorithm based on channel state information (CSI); adopting two-stage automatic gain control (AGC) to condition a signal received from a power line; and carrying out dynamic frequency hopping between a frequency band with serious interference and an idle frequency band based on a continuous spectrum sensing result. Compared with the prior art, through the multi-dimensional adaptive technology, the communication system can sense the channel state in real time and dynamically adjust the communication strategy, so that a stable communication link is established in a severe power grid environment.

The invention belongs to the technical field of signal processing, and particularly relates to a coherent light high-speed transmission signal processing method based on deep joint compensation, which comprises the following steps of: performing fine frequency offset and inter-carrier interference joint preprocessing on a coherent light receiving sampling sequence; obtaining a pre-processing output sequence and at least one estimation parameter derived from fine frequency offset and inter-carrier interference combined pre-processing; inputting the preprocessing output sequence into a diffusion type score guide joint compensation network module to obtain a deep joint compensation sequence; performing online judgment and decoding on the deep joint compensation sequence, and adaptively updating internal parameters of the diffusion type score guide joint compensation network module when a preset adaptive updating condition is met; according to the invention, the symbol residual error can be obviously reduced, the forward error correction gain can be improved, and the stability and robustness of the system under high-order modulation, high symbol rate and long-distance link scenes can be enhanced.

The invention relates to the technical field of terminal communication, and provides a team state synchronization method based on ad hoc network communication, an intelligent terminal and a medium, after a plurality of intelligent terminals complete team networking, a first intelligent terminal elected as a team master device broadcasts a synchronization beacon frame, enabling the second intelligent terminal to enter a corresponding working state after receiving the synchronous beacon frame; predicting whether the bit error rate in a future short time is increased or not based on the channel impulse response fed back by the second intelligent terminal and the real-time position coordinates; when the predicted bit error rate is increased, forward error correction coding redundancy is increased in a pre-sent light effect instruction, and a target light effect instruction is obtained; and the target lighting effect instruction is sent to the second intelligent terminal, so that the second intelligent terminal controls the partition lamp group to output the corresponding lighting effect according to the received target lighting effect instruction, and visual synchronization of the team state is realized. According to the method, the accuracy of light effect instruction transmission can be guaranteed, and efficient visual synchronization of the team state is realized.

The invention discloses a high-resolution and low-delay audio and video transmission method and system, which realize high-quality and low-delay remote audio and video transmission by dynamically negotiating transmission resolution and self-adaptive compression coding. The method comprises the following steps: constructing a resolution negotiation matrix through extended display identification data based on receiving end equipment, and determining an optimal transmission resolution parameter; the compression ratio is dynamically adjusted in combination with network bandwidth fluctuation, a compressed data stream is generated by adopting inter-frame prediction coding, and the anti-interference capability is enhanced through forward error correction and time division multiplexing packaging; and finally, the differential signal pair is transmitted to a receiving end to be decoded and restored into a standard audio and video signal. According to the method, the transmission delay is remarkably reduced while the high-resolution image quality is ensured, the method effectively adapts to a complex network environment, the transmission distance and stability are considered, and the method is suitable for application scenes such as remote conferences and real-time monitoring which have high real-time requirements.

The invention provides a video coding and compression transmission method for intelligent equipment, which belongs to the technical field of video coding and compression transmission, realizes advanced channel quality estimation by establishing a channel prediction model enhanced by a spatial transformation network, configures layered coding parameters according to a prediction result and optimizes motion search in combination with inertial measurement unit data. An optimal coding mode is selected by an application rate distortion optimization algorithm, enhancement layer sending is adjusted according to real-time feedback by adopting a dynamic transmission scheduling strategy, and differential forward error correction protection and a time-space domain error concealment mechanism are matched; the technical problem that video transmission is unstable due to violent fluctuation of channel quality when intelligent equipment moves and works in complex electromagnetic environments such as a transformer substation is solved.

The invention relates to a BMC firmware mirror image recovery method and device and terminal device.The method comprises the steps that a storage area of a preset storage chip is divided into multiple areas, and the multiple areas comprise a first area and a second area; a first file in the firmware mirror image file is coded through a forward error correction algorithm, redundant recovery data is obtained, backup files of second files except the first file in the firmware mirror image file are obtained, and the first file comprises a root file system; the first file and the redundancy recovery data are stored in the first area, and the second file and a backup file of the second file are stored in the second area; when it is detected that the first file is abnormal, the first file is recovered based on the redundant recovery data through a forward error correction algorithm; and when detecting that the second file is abnormal, recovering the second file through the backup file of the second file. According to the method and the device, the problem that the reliability of recovering the firmware mirror image file through out-of-band network transmission is relatively low is solved.

Systems and techniques for forward error correction decoding process power reduction are described herein. A first codeword is identified in a network transmission. A conditional decoding window starting with the first codeword is generated. The conditional decoding window is aligned with frames of the network transmission. A report is generated that includes an indication of a correlation of the conditional decoding window to the network device. The conditional decoding window and the report are sent to the network device. A conditional decoding window including a first codeword is received. The first codeword is decoded to determine a second codeword. A report is obtained that includes a codeword correlation bit for the second codeword. Upon determining that the codeword correlation bit indicates that the second codeword is not correlated, the second codeword is discarded without decoding the second codeword.

The invention discloses an anti-packet loss processing method and system for audio and video data. The method is applied to an articulated naturality web, the articulated naturality web comprises two groups of devices, and the two groups of devices are respectively a receiving end device and a transmitting end device. According to the anti-packet-loss processing method and system for the audio and video data, provided by the invention, through a series of steps of packet loss detection, recovery, error concealment and the like, the audio and video data can be recovered to the greatest extent under the condition of data packet loss, the problems of jamming, fuzzy pictures, discontinuous sound and the like are reduced, and the quality of the audio and video is remarkably improved; forward error correction, interpolation compensation and various error hiding methods are carried out by using redundant data, and lost data packets are processed from different angles, so that the definition and fluency of audios and videos and the fidelity of the audios are ensured; meanwhile, through secondary packet loss detection, the situation that the transmission integrity of the audio and video data packets is affected due to the fact that the packet loss phenomenon is not found in time can be effectively avoided.

A method according to one embodiment of the present specification comprises a step of transmitting a signal on the basis of the number of repetitions related to a specific level. The specific level is related to i) a codeword based on line coding, ii) a chip related to modulation, or iii) a forward error correction code (FEC).

A forward error correction code switching method applied to a first device includes determining a target operational forward error correction code according to predetermined transmission channel quality and a target traffic requirements; and notifying a second device of the target operational forward error correction code to enable the second device to switch a current operational forward error correction code to the target operational forward error correction code, and decodes user traffic data according to the target operational forward error correction code.

A method for generating soft information for a digital signal decoder. The method includes receiving a first plurality of signals, each corresponding to a time index, each time index being associated with two states including state 1 and state 0. The method also includes processing the first plurality of signals to calculate path metric values of state 0 and 1 for generating each of a second plurality of most-likely symbols by hard decisions and intermediate information for a most-likely path and a second-likely path at each time index. The method includes computing a difference between the most-likely path and a second-likely path for a given one of the two states at each time index. The method also includes determining a soft information corresponding to either one of the two states at the time index per one of the second plurality of most-likely symbols.

A method according to one embodiment comprises sending a first plurality of packets using forward error correction, FEC, with an initial success ratio. A report is received regarding a number of packets in the first plurality that were not delivered because they were actively discarded or considered obsolete. An updated success ratio is selected based at least in part on the report. A second plurality of packets is then sent using FEC with the updated success ratio.

The invention relates to an IRNSS navigation signal simulation generation method and system based on parameter compensation, and the method comprises the steps: receiving original signal data outputted by an IRNSS navigation receiver, and receiving a target machine position coordinate and a velocity vector; analyzing the navigation message to extract ephemeris parameters, and calculating the real-time position and velocity vector of the satellite; calculating a Doppler frequency compensation value and a pseudo code time delay compensation value; according to the pseudo code time delay compensation value and a preset target simulation coordinate, modifying a signal emission time field in the navigation message, generating a simulation navigation message frame, carrying out forward error correction coding processing, generating a coding symbol sequence, and carrying out modulo-two addition operation on the coding symbol sequence and a pre-generated PRN pseudo code sequence to obtain a baseband spread spectrum signal; generating an intermediate frequency carrier signal according to the Doppler frequency compensation value and the carrier phase; and modulating the baseband spread spectrum signal to the intermediate frequency carrier signal, and outputting an intermediate frequency analog signal. According to the invention, the concealment of signal simulation and the success rate of capturing the analog signal by the target receiver can be improved.

The present invention discloses a communication system including WLAN communication systems comprising transmitter including an OTFS grid based Orthogonal Time Frequency Space (OTFS) waveform generator and Multiple Input Multiple Output (MIMO) streams. The transmitter comprises signal processor including OTFS modulator having FEC (forward error correction) encoder for pre-FEC bit appended input data stream and transmission of encoded input data stream in a selective sequence vide OTFS waveform modulated OTFS grid-partially loaded with QAM / PSK symbols of said encoded input data stream through MIMO transmitter and receiver streams including MIMO pre-coder based multi antenna support for said transmission and reception of said OTFS waveform thereby enabling OTFS waveform transmission and retrieval of input data stream.

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 invention relates to the technical field of electronic data collection, in particular to a secure data transmission method for an EDC system, and the method comprises the steps: carrying out the semantic layering of a data package, and setting target transmission reliability for the data of different semantic hierarchies; the network transmission state is evaluated in real time, the minimum redundancy required for achieving the target transmission reliability is dynamically calculated, and forward error correction coding parameters are determined; carrying out adaptive forward error correction coding on data of different semantic hierarchies according to the parameters, and carrying out hierarchical transmission according to priorities; and the receiving end carries out progressive reconstruction and instantly presents the reconstructed data. Through the technical scheme of the invention, accurate calculation and application of appropriate redundancy protection can be realized according to the data value and the real-time network quality, reliable transmission of high-value data is ensured in a weak network environment, and the transmission efficiency is improved to the greatest extent.

The invention relates to the technical field of data coding, and particularly provides a forward error correction method based on link state self-adaption, a medium and equipment, and the method can comprise the steps: predicting a future packet loss rate based on collected performance index data of a WAN link; wherein the performance index data comprises a real-time packet loss rate, one-way delay data, jitter data and bandwidth data; obtaining a redundancy proportion of forward error correction coding through the future packet loss rate; wherein the redundancy proportion is a ratio of a redundant data packet to an original data packet; and encoding the data stream of the WAN link by using the encoding parameter corresponding to the redundancy ratio to obtain encoded data. According to the embodiment of the invention, the coding mode can be dynamically adjusted, and the data protection reliability is improved.

The invention discloses a self-adaptive compression and lossless fast transmission method and system for high-frequency test data. The method comprises the following steps: extracting multi-dimensional dynamic feature vectors from high-frequency test data in real time and marking feature points; based on the features, the network bandwidth and the target compression ratio, dynamically selecting a compression algorithm combination and parameters through a pre-training decision model; performing data framing and typed preprocessing according to the algorithm combination; compression is executed through a multi-stage assembly line, and a correction link based on statistical characteristics is inserted between stages; constructing a three-dimensional transmission state matrix fusing priorities, links and quality scores, dynamically allocating links and adaptively adding forward error correction codes; and after error correction and decompression of a receiving end, realizing lossless verification through multi-dimensional comparison of feature point sequences of the reconstructed data and the original data. According to the method, the whole-course self-adaption of the compression strategy and the transmission scheduling is realized, and the lossless and reliable recovery of the data is ensured while the compression and transmission efficiency is improved.

The embodiment of the invention discloses a data processing method, which can be applied to a cascade FEC (Forward Error Correction) scheme in a 1.6 T high-speed transmission scene, and the scheme comprises the following steps: p: q symbol demultiplexing, alignment identifier locking and de-skewing are carried out on p first data streams subjected to Reed-Solomon RS (Reed-Solomon Reed-Solomon) coding to obtain q second data streams, p is an integer greater than or equal to 1, q is an integer greater than or equal to 1, and q is an integer greater than or equal to 1; q is equal to 2 * p; and performing data processing including inner code coding and dual-polarization symbol mapping on the q second data streams to obtain one dual-polarization data stream. According to the scheme, a four-symbol boundary is provided before the inner code is coded, so that the error correction performance of a cascade FEC scheme can be improved.

In one aspect, a method includes receiving, in a first wireless device, a data transmission including at least one orthogonal frequency division multiplexing (OFDM) packet from a second wireless device; processing the at least one OFDM packet to recover data and providing the data to a host processor of the first wireless device; encoding, in the first wireless device, at least one decoded symbol of the at least one OFDM packet using forward error correction coding; processing the encoded at least one decoded symbol to recover at least one corresponding transmission symbol of the at least one OFDM packet; and determining a distance estimate between the first wireless device and the second wireless device based at least in part on the corresponding transmitted symbols.

Communication devices, systems and methods for performing multi-layer packet coding (MLPC) in a wireless system are provided. The MLPC includes segmenting a data stream into a plurality of data segments, encoding each of the plurality of data segments into a plurality of forward error correction (FEC) codewords, performing a first exclusive OR (XOR) operation on the plurality of FEC codewords to generate a plurality of first layer parity codewords, performing a second XOR operation on the plurality of first layer parity codewords to generate at least one second layer parity codeword, and transmitting at least one of: the plurality of FEC codewords, the plurality of first layer parity codewords, or the at least one second layer parity codeword.

The invention provides an information reporting method and device and a storage medium, and the method is executed by a terminal, and the method comprises the steps: determining the number of first data packets according to first information, the first information being used for indicating related parameters for determining the number of the first data packets, the first data packets being part of data packets in second data packets, and the second data packets being part of the second data packets; the second data packet is a data packet corresponding to a third data packet on a user plane protocol stack layer of the terminal, and the third data packet is a data packet generated by processing at least one original data packet by using an application layer forward error correction (FEC) code; and sending second information to the network equipment, wherein the second information is used for indicating the data volume of the first data packet. The data volume reported by the terminal can be adjusted according to the first information, so that the network equipment can conveniently configure the terminal according to the adjusted data volume, and resource waste is reduced.

Embodiments of the present application provide a data packet transmission method and device, terminal equipment and storage medium, comprising: obtaining a first fragmented data packet to be sent; performing first forward error correction coding on the first fragmented data packet to obtain a second fragmented data packet; configuring the second fragmented data packet according to preset bandwidth information of each link; performing second forward error correction coding on the second fragmented data packet on each link to obtain a target fragmented data packet, and sending the target fragmented data packet to a receiving end device. Through double forward error correction coding on the data packet to be transmitted and data transmission according to the bandwidth information of each link, the link stability in the transmission process is increased, and the retransmission rate is reduced.

The embodiment of the invention provides an optical transport network signal processing method, a storage medium and an electronic device, and the method comprises the steps: regularly adding alignment mark information into an optical transport network signal to obtain a first signal, regularly adding forward error correction information into the first signal to obtain a second signal, and distributing the second signal to a plurality of channels, a plurality of channel signals are obtained, and the channel signal on each channel is sent. According to the embodiment of the invention, flexible splitting of the optical transport network signal can be realized, and the problems of complex implementation and poor adaptability of hardware for multi-channel transmission of the optical transport network signal in related technologies are solved.