286 results about "Error correction coding" patented technology

The method focuses on the technical field of communication, and the communication connection problem under the cooperative operation scene of the unmanned vehicle and the unmanned aerial vehicle is accurately positioned. In practical application, communication connection is troubled by a complex environment, signals are prone to strong interference, the transmission distance is obviously limited, and double requirements of real-time performance and accuracy are difficult to consider in the aspect of data transmission characteristics during cooperative operation of the two. According to the invention, ZigBee, 5G, satellite communication modules and multi-mode communication modules are integrated, an adaptive protocol is optimized, channels are sensed in real time, the channels are selected and switched through an intelligent algorithm, signals are enhanced through directional antennas and beam forming, interference resistance is realized through adaptive filtering and error correction coding, and stability is guaranteed by means of link monitoring and a self-healing mechanism. According to the method, reliable interaction of data between the unmanned vehicle and the unmanned aerial vehicle in a complex environment can be ensured, and real-time and accurate transmission of monitoring data can be ensured even in case of strong electromagnetic interference or severe weather.

The invention relates to a multi-dimensional transmission data compression sensing method and system for urban emergency rescue, and the method comprises the steps: obtaining multi-modal data, carrying out the normalization processing and sparse representation, and obtaining the sparse coefficient of each modal; constructing a block diagonal random matrix for each modal sparse coefficient to perform independent compression sampling, generating a low-dimensional observation value before coding, and performing arithmetic coding and low-density parity check code error correction coding to generate an anti-interference code stream; and performing low-density parity check code decoding and arithmetic decoding on the anti-interference code stream to obtain a decoded low-dimensional observation value, performing iteration by using an orthogonal matching pursuit algorithm, recovering sparse coefficients of each mode, performing reconstruction to obtain text, image and audio features, and projecting the text, image and audio features to a shared semantic space to obtain a shared semantic space. And calculating a joint semantic weight through a cross-modal attention mechanism, and generating a multi-modal fusion result with consistent semantics. The method disclosed by the invention provides an efficient, robust and semantic collaborative end-to-end solution for urban emergency rescue.

The invention relates to an underwater optical communication LDPC (Low Density Parity Check) coding processing method. The method comprises the following steps: determining a current channel quality grade based on a real-time communication distance and channel state information; dynamically selecting LDPC (Low Density Parity Check) coding parameters and modulation orders in combination with equipment mobile data and channel quality levels, and generating an adaptive parameter combination; performing error correction coding on the data according to the selected parameters and generating an optical communication signal; transmitting to a receiving end through an optical channel; and dynamically updating the coding parameter and the modulation order based on the feedback information of the receiving end. According to the method, the problem that a traditional fixed coding scheme is insufficient in error correction capability or wastes resources in a dynamic distance scene is solved by predicting the equipment moving trend and the channel state in real time and adaptively adjusting the coding parameters and the modulation mode, the error rate is remarkably reduced, the communication efficiency is improved, and the method is suitable for a complex and changeable underwater optical communication environment.

A wireless communication apparatus and method using probabilistic constellation shaping in connection with modulation. A wireless transmission device may determine a sequence of amplitude symbols from a sequence of information bits using a distribution matcher (DM) configured for probabilistic amplitude shaping. The device may further apply error correction coding to encode an information block corresponding to at least a portion of the sequence of amplitude symbols. And the device may generate a sequence of output symbols for transmission based on the encoded information block. The device may apply interleaving to one or more of the sequence of amplitude symbols, the information block, the encoded information block, or a combination of the sequence of amplitude symbols and the encoded information block, for the generating of the sequence of output symbols.

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 provides a data management method and system based on optomagnetic fusion storage, and belongs to the field of data management.The method comprises the steps that target data are obtained, data feature information is collected, and data popularity analysis is carried out; a basic storage scheme is determined according to data popularity, and intelligent decision-making of optical storage, magnetic storage or fusion storage is realized through data criticality analysis and popularity critical coefficient evaluation; predicting a storage loss parameter according to the data popularity and the storage scheme, and optimizing an error correction code or erasure code parameter in combination with the data criticality; and finally, implementing data management according to the determined storage scheme and optimization parameters. The technical problems that a traditional storage system cannot intelligently distribute storage media according to data characteristics, and access efficiency and storage safety are difficult to balance are solved, self-adaptive selection of a storage scheme and optimization of storage quality are achieved, and efficiency and reliability of data management are improved.

The invention discloses a customer information storage management method and system based on a block chain, and relates to the technical field of distributed data evidence storage, and the method comprises the steps: collecting terminal customer information, generating an encrypted data packet, carrying out erasure coding, and generating an encrypted data fragment set; carrying out distributed storage based on the encrypted data fragment set, and calculating a data availability commitment at the same time; executing availability sampling according to the data availability commitment, and generating a fragment validity proof; based on the fragment validity proof, performing format and validity verification to obtain a to-be-processed proof set; and generating a recursive aggregation proof according to the to-be-processed proof set, and submitting the recursive aggregation proof to the block chain to verify and update a proof storage state. And cryptographic authentication is carried out on the persistent evidence storage state of the data assets, so that the dual beneficial effects of ensuring data privacy and credible evidence storage are achieved.

The invention provides a fusion type secure storage system, electronic equipment, a data management method and a computer readable storage medium. The system comprises a hardware security layer, an encryption processing layer, a verification error correction layer, a data stream processing layer and an intelligent management layer which are in communication connection, the hardware security layer provides a physical trusted root for the system and executes a security policy; the encryption processing layer is used for carrying out encryption processing on data based on the security service provided by the physical trusted root; the verification and error correction layer is used for carrying out integrity verification and self-adaptive error correction coding on the encrypted data; the data stream processing layer is used for executing a near data calculation task on the data subjected to verification and error correction; and the intelligent management layer collects real-time state data from the hardware security layer, the encryption processing layer, the check error correction layer and the data stream processing layer, and performs dynamic strategy configuration and global optimization decision, thereby improving the active calculation, dynamic adaptation and intelligent optimization capabilities of the system.

The invention discloses an AI and GIS combined natural resource space-time mapping knowledge domain construction method, which is suitable for intelligent mapping and dynamic management of natural resource space units. GIS data are acquired, multi-scale spatial range automatic identification is carried out, and map nodes are constructed; then, introducing crowd LBS behavior data, and establishing an edge relationship between dynamic nodes; a spatial topological structure between nodes is automatically learned by adopting a graph convolutional network model, and intelligent classification and correlation prediction between spatial units are realized; extracting node attribute codes, service type codes and state label codes, constructing a two-dimensional code data string, generating a standard two-dimensional code image through error correction codes and formatted information, and embedding the standard two-dimensional code image into node data; and a terminal user can access the atlas data by scanning a code and trigger permission verification and call log records. According to the method, automatic space structure identification, dynamic map updating and lightweight calling are realized, and the intelligence, integration and safety of natural resource data management are improved.

The invention discloses a communication and conduction integrated navigation information broadcasting method suitable for a long navigation message. The method comprises the following steps: (1) injecting a navigation enhancement message to be broadcasted to a satellite from the ground; (2) the satellite processes the uploaded navigation enhancement message to generate a navigation message frame; (3) carrying out interleaving processing on the navigation message frames to form navigation message subframes; (4) performing CRC-x verification on the navigation message subframes; (5) carrying out 1 / 2 LDPC error correction coding on the navigation message sub-frame after the CRC-x verification; and (6) broadcasting the navigation message after the LDPC error correction coding and the communication signal at the same time, adopting the same waveform and occupying different bandwidth resources. The broadcasting method provided by the invention solves the problem of low frame splicing success rate of the long telegraph text.

The invention relates to an FPGA-based satellite-borne file adaptive storage and scheduling method, which comprises the following steps: defining a data plane and a control plane, the data plane being responsible for high-frequency and high-speed data processing, and the control plane being responsible for low-frequency and low-speed data management and decision making; the data plane obtains a real-time data stream to be stored and stores the real-time data stream into a data cache; monitoring the running state of the data cache in real time, generating cache state data and reporting the cache state data to a control plane; the control plane makes a strategy decision based on the cache state data to generate a target strategy instruction; the data plane obtains the instruction and carries out hardware priority judgment in combination with cache state data so as to determine a final data writing instruction; and the data plane responds to the write-in instruction, executes error correction coding processing, data write-in and file verification processing, and reports a file closing state to the control plane. The method has the advantages that the system can dynamically respond to the real-time system load, and the stability and reliability of system scheduling are improved.

The invention discloses a data management system based on unmanned aerial vehicle surveying and mapping, and particularly relates to the technical field of data management. The method comprises the steps of collecting unmanned aerial vehicle surveying and mapping data, and performing space coordinate registration and unified coding; performing spatial region division according to the terrain elevation variable coefficient and the obstacle projection coverage rate to obtain a high-density verification region and a low-density verification region; for the high-density verification area, calculating the feature matching degree of an overlapping area of adjacent frames through a local feature matching algorithm, and outputting first correction data; performing data compensation on the low-density verification region by adopting spatial interpolation and cubic spline interpolation to generate second correction data; generating a full-scene reconstruction data frame based on the first correction data and the second correction data; based on full-scene data frame reconstruction, region weight factor distribution, differential error correction coding execution and unmanned aerial vehicle surveying and mapping result data output, the spatial adaptability of data verification is effectively improved, and the overall accuracy and integrity of unmanned aerial vehicle surveying and mapping data are improved.

The invention discloses a soft decoding method and device, a medium and a product, and relates to the technical field of error correction coding, and the method is applied to a low-density parity check code, and comprises the steps: obtaining a target low-density parity check code with an information node and a check node containing an erasure bit; and allocating a preset non-zero log-likelihood ratio to the erasure bit on the check node, and executing first soft decoding. And if the first soft decoding fails, judging whether to carry out second soft decoding or not based on the weight of the syndrome generated by the first soft decoding and the number of the erasure bits on the information node. If it is judged that the second soft decoding needs to be carried out, a preset non-zero log likelihood ratio is distributed to the erasure bit located on the information node, and the second soft decoding is carried out. According to the method and the device, the erasing bits on different nodes are conditionally processed in stages, so that the success rate and the efficiency of decoding are effectively improved.

Provided in the present application are a data processing method and apparatus based on data coding, and a device. The method comprises: performing N-channel error correction coding on data to be processed that is in information to be processed, so as to obtain N pieces of coded data to be processed; by using coded meta-channel data obtained by means of error correction coding, performing redundancy processing on the coded data to be processed, so as to obtain N pieces of response data; and then performing error correction decoding on the N pieces of response data, so as to obtain processing result information of the information to be processed.

Apparatuses and methods for pipelining memory operations with error correction coding are disclosed. A method for pipelining consecutive write mask operations is disclosed wherein a second read operation of a second write mask operation occurs during error correction code calculation of a first write mask operation. The method may further including writing data from the first write mask operation during the error correction code calculation of the second write mask operation. A method for pipelining consecutive operations is disclosed where a first read operation may be cancelled if the first operation is not a write mask operation. An apparatus including a memory having separate global read and write input-output lines is disclosed.

Disclosed in the present disclosure are a memory coding method, a memory decoding method, an apparatus, an electronic device and a storage medium. The coding method comprises: acquiring a data block to be written and a known word string corresponding to said data block; performing error correction coding on said data block and the known word string to obtain error correction information; and splicing the data block and the error correction information to obtain an error-correcting code codeword, and storing same into a memory. The known word string is introduced to undergone error correction coding together with the data block, so as to increase the length of coded data and ensure the protection capability of error-correcting code codewords, and then the data block and the error correction information are spliced to obtain the error-correcting code codeword to be written into the memory. Since the known word string is introduced for error correction coding, when the error-correcting code codeword protects one data block, the strong error correction capability of the error-correcting code codeword having high code length can still be ensured, and the memory access granularity becomes a basic access unit, such that the problems of read amplification and write amplification can be overcome when the data block is updated, thus weakening the contradiction between the code length of the error-correcting code codeword and the memory access granularity.

The invention provides a physical frame structure design method suitable for satellite-ground high-order high-bit-rate wireless communication, which comprises the following steps of: slicing service data according to a preset length, and generating a baseband frame based on the obtained data slices; performing scrambling processing on the baseband frame to obtain a scrambled baseband frame; sequentially executing preset error correction coding processing on the scrambled baseband frames to obtain coded frames; performing internal interleaving processing on the coding frame to obtain internal interleaving data, and forming a first physical frame; performing external interleaving processing on the first physical frame to obtain external interleaving data; mapping the outer interleaved data into a symbol stream; performing physical frame framing based on the symbol stream to obtain a second physical frame; and performing scrambling processing on the to-be-scrambled symbols except the physical frame header in the second physical frame to obtain a scrambled physical frame, and performing modulation based on the scrambled physical frame to perform data transmission, thereby improving phase noise resistance and channel distortion resistance, enhancing Doppler frequency shift resistance, and optimizing transmission efficiency and reliability.

The invention discloses an industrial remote controller system based on a LoRa technology and a real-time reliable communication control method thereof, and belongs to the technical field of industrial wireless control, and the method specifically comprises the steps: collecting communication link quality parameters, constructing a multi-dimensional link quality evaluation model, and outputting a link quality score; a LoRa physical layer parameter is dynamically adjusted by using a fuzzy logic decision algorithm based on the score, an optimized parameter configuration table is obtained, a bidirectional handshake protocol is established, and an encrypted instruction-response data packet is generated; the central coordinator allocates time division multiple access time slots according to the link quality score, and the industrial remote controller sends encrypted data in the corresponding time slots by using hybrid error correction codes; the controlled equipment receives the data execution instruction, generates a feedback data packet containing an execution state, and returns the feedback data packet to the industrial remote controller through a time division multiple access time slot; the method improves the real-time performance and reliability of the communication of the industrial remote controller.

The invention discloses a method for realizing synchronization of a local clock and a system clock based on Beidou time service, which comprises the following steps that: a Beidou terminal receives a Beidou time service signal, packages time information into a data packet through a preset communication protocol and an interface, and adds a check code and a timestamp; errors and interferences in a data transmission process are processed by adopting error correction coding and digital filtering technologies, so that the data transmission reliability is improved; according to a network topology structure and link quality, an optimal transmission route is dynamically selected, and a multi-path transmission and load balancing technology is adopted, so that the transmission efficiency is improved; the receiving end reorganizes and verifies the received time information data packet, extracts time information and converts the time information into a standard time format; the method comprises the following steps: receiving Beidou time service signals for multiple times, calculating transmission delay and clock skew by utilizing a least square method, and dynamically adjusting local clock parameters by adopting a proportional integral control algorithm and a Kalman filtering algorithm to realize nanosecond time synchronization.

The invention discloses an error correction method and device for an NAND FLASH controller and a flash memory, and the method comprises the steps: receiving preset data by the controller, and judging the relation between the current erasing frequency of a storage module and T1 and T2; if the current erasing frequency is less than T1, controlling a first error correction module to carry out error correction coding on the preset data to obtain first coded preset data; if the current erasing frequency is greater than or equal to T1 and less than T2, controlling a second error correction module to carry out error correction coding on the preset data to obtain second coded preset data; if the current erasing frequency is greater than or equal to T2, controlling a third error correction module to carry out error correction coding on the preset data to obtain third coded preset data; and obtaining coding preset data according to the first coding preset data, the second coding preset data or the third coding preset data, and writing the coding preset data into a storage module. The three error correction modules are arranged in the controller, the controller can select the error correction modules, and the adaptability of the controller is improved.

The embodiment of the invention provides an adaptive cross-domain operation gateway underwater acoustic coding method and device, and the method comprises the steps: receiving a preset test signal transmitted by a transmitter before information transmission, and determining a corresponding channel state in a current time period according to the test signal and a preset least square method, time sequence analysis is carried out according to the current signal-to-noise ratio in the channel state of the current time period, the channel state of the next time period is obtained through prediction, and the channel quality of the channel state of the next time period is judged according to the numerical comparison relation between the predicted signal-to-noise ratio in the channel state of the next time period and a preset threshold value; if it is judged that the channel state in the next time period is poor, an error correction coding scheme with the low coding rate and the high error correction redundancy is selected from a preset coding scheme library, and if it is judged that the channel state in the next time period is good, an error correction coding scheme with the high coding rate is selected from the preset coding scheme library; according to the invention, the channel use efficiency can be optimized, and energy waste can be reduced.

The invention relates to the technical field of satellite-borne data storage, and discloses a satellite-borne file storage system based on an FPGA (Field Programmable Gate Array), which comprises an FPGA processing unit used for executing file information management, storage control, file indexing, parallel read-write operation and error correction coding; the FPGA processing unit is used for processing file data and file information, the NandFlash storage unit is used for storing file data and file information, and the invention further discloses an FPGA-based satellite-borne file storage method which comprises the following steps: S1, initializing the file storage system, including configuring the FPGA processing unit and the NandFlash storage unit; and S2, creating the file. According to the method, the high-concurrency file operation performance is improved through an FPGA parallel processing architecture, and the efficiency bottleneck of a traditional CPU serial architecture is solved; and meanwhile, by combining triple-modular redundancy and a multi-level error correction mechanism, high-reliability storage of data in a severe environment is ensured, and the problem of data integrity caused by hardware faults and cosmic ray interference is solved.

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 discloses a multi-system coding and reading method for compound base DNA (deoxyribonucleic acid) storage, which combines multi-system error correction coding and symbol mapping methods to code digital information and map the digital information into a DNA chain containing a compound base and a standard base, and adopts a high-reliability short grouping error correction code to code an address sequence and add the coded address sequence to two ends of a data DNA sequence; when the data are read out, a short grouping error correction code is utilized, a unique address of a sequencing read section is achieved, rapid clustering is achieved, entropy-driven set division and maximum likelihood-based letter detection are combined, original characters of each synthesis site are accurately detected, and original data are recovered through error correction decoding. According to the method, the separable characteristic of the information entropy is utilized, the composite bases are subjected to diversity, the distinction degree between the concentrated characters is increased, the detection capacity is enhanced, the base frequency information in the sequencing data can be effectively utilized, and the coverage degree needed by composite base detection is reduced.

The invention relates to the technical field of computer network transmission, and discloses a forward error correction system and method.The system is applied to a software defined wide area network, and the system comprises a controller used for receiving user configuration data, calculating coding parameters based on the user configuration data and sending the coding parameters to a forward error correction coding module; the forward error correction stream selection module is used for screening target traffic matched with the session based on the user configuration data and sending the target traffic to the forward error correction coding module; and the forward error correction coding module is used for carrying out forward error correction coding on the target traffic based on the coding parameters to generate a target message. According to the method, the controller is used for generating the coding parameters and the corresponding decoding parameters, and issuing the coding parameters and the corresponding decoding parameters to the intelligent gateway after the forward error correction tunnel is created, so that computing resources of the intelligent gateway are saved, delay fluctuation of forward error correction decoding is reduced, meanwhile, the transmission quality of an application can be improved, and the message processing performance which does not participate in forward error correction is not influenced.

The invention relates to the technical field of computers, in particular to a block chain right-confirming forestry remote sensing data ontology feature recognition method and system, and the method comprises the steps: extracting the multi-scale features of forestry remote sensing image data through a pre-trained deep convolutional neural network, and generating a feature pyramid with an unchanged rotation and scale; a time-space fusion feature vector is generated by combining seasonal attention weight adjustment, and forestry remote sensing image fingerprints are formed after principal component analysis and dimension reduction; a fuzzy commitment is adopted to bind the random key after error correction coding with a forestry remote sensing image fingerprint to generate a block chain evidence storage commitment, and a storage architecture with on-chain evidence storage and under-chain metadata collaboration is constructed; and efficient right confirmation is realized. The problem that a traditional Hash method is sensitive to image deformation is solved, the problem of feature drift caused by seasonal changes is solved, verifiable right confirmation is achieved, the method has the advantages of being high in storage efficiency, high in response speed and the like, a credible ownership authentication basis is provided for forestry remote sensing data sharing, and the data circulation efficiency is remarkably improved.

A geometry-aware method of writing parity, performed by a storage system is provided. The method includes writing data, using error correction coding, to a RAID stripe comprising a plurality of allocation units of storage memory of the storage system, and writing one or more parity pages comprising parity data for a block having a portion of the data of the RAID stripe in one of the plurality of allocation units of the RAID stripe to a targeted differing word line of the block or a differing block, the parity data for the block distinct from the error correction coding of the RAID stripe.

The invention discloses an information one-way isolated transmission method based on image coding recognition, and relates to the technical field of one-way isolated transmission, the method comprises a data acquisition unit (1), a two-dimensional code display screen (2), a code scanning gun (3) and a data storage unit (4), the coding technology is utilized to convert field data into a two-dimensional code form, and the two-dimensional code form is transmitted through a 485 protocol; the coding mode is matched with the display characteristic of the liquid crystal module of the two-dimensional code display screen, the liquid crystal module accurately adjusts the driving voltage according to the reflectivity information of the two-dimensional code module, the accuracy of two-dimensional code display is ensured, meanwhile, the code scanning gun can accurately collect and decode the specially coded two-dimensional code, decoding errors are reduced, and the data storage unit is used for storing data. The gateway module can store data containing reflectivity information, the information can be used for follow-up analysis, and the integrity and confidentiality of the data can be guaranteed through an error correction coding segment in the transmission process.

The invention discloses a national secret SSL handshake communication method based on a quantum key, and relates to the technical field of quantum communication, and the method comprises the following steps: point-to-point connection is established between two communication parties through a quantum communication link, and the two communication parties are respectively a sender and a receiver; a sender uses a single photon source to generate and send a group of quantum bits to a receiver according to a predetermined quantum coding mode, and the receiver measures the received quantum bits through a quantum detection device to obtain a corresponding measurement result. According to the method, the quantum state in the quantum communication link is monitored in real time, the potential collapse risk prediction is carried out in combination with the deep neural network, the redundancy is automatically adjusted when the risk is found, error correction coding is carried out, and thus the anti-interference capability is improved. By introducing an anti-interference structure and dynamic redundancy adjustment, key distortion or communication interruption caused by quantum state collapse is effectively avoided, smooth key negotiation is ensured, and the reliability and data security of a communication link are remarkably enhanced.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure discloses a method and an apparatus for error correction coding in a communication system, more specifically, to error correction coding integrated with transmission diversity.