92 results about "Error correction coding" patented technology

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 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.

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.

This invention discloses a method for embedding a hidden two-dimensional dot matrix watermark using a splicable, cut-out, and fully embedded method. It includes: (1) data normalization encoding; (2) data information signature; (3) multiple error detection and correction encoding; (4) two-dimensional dot matrix; (5) pseudo-random scrambling of the dot matrix data; (6) scale matching with the associated carrier image; (7) generation of a two-dimensional dot matrix point cloud; and (8) embedding the hidden two-dimensional dot matrix point cloud into the associated carrier image. This invention is an information hiding method based on the combination of reliability encoding and printed image processing in modern communication technology using two-dimensional coded dot matrices. It can hide anti-counterfeiting marks, images, or text within printed images to achieve information anti-counterfeiting and information traceability. This method improves the anti-attack capability of the two-dimensional dot matrix and overcomes the problem of unreadable information caused by image damage or misjudgment during printing and optical image acquisition.

The invention discloses a two-dimensional code recognition and defect repair method and device, and the method achieves the effective integration of visible light, infrared and ultraviolet image features through the collection and preprocessing of a multi-modal image, greatly improves the feature recognition degree of a two-dimensional code under a complex background, and solves a problem that a conventional method is poor in adaptability to the complex background. According to the lightweight convolutional neural network defect detection model, pixel-level defect segmentation and multi-dimensional classification are realized, a defect severity grading mechanism is combined, an accurate basis is provided for intelligent defect evaluation, and the defect of lack of intelligent evaluation in the prior art is made up; for self-adaptive repair strategies of defects of different types and levels, the advantages of multiple algorithms such as texture synthesis, error correction coding and geometric correction are fused, and the repair precision of the two-dimensional code is greatly improved; a closed-loop verification mechanism of repair and recognition realizes linkage optimization of a repair process and a recognition result by dynamically adjusting repair parameters, and the problem of low efficiency caused by separation of repair and recognition is effectively solved.

A communication method, apparatus, and system are provided. An apparatus (such as a channel interleaver) can acquire a first coded bit sequence, wherein the first coded bit sequence is obtained by rate matching a second coded bit sequence; divide the first coded bit sequence into blocks; and perform channel interleaving on the blocks in a predefined order, wherein the channel interleaving is applied to the first coded bit sequence before modulation and transmission to the channel. The ability to divide the first coded bit sequence into blocks for channel interleaving enables block-level interleaving with higher parallelism, improving flexibility, simplifying operation, and achieving higher throughput, while also providing stable or better performance under high-order modulation or fading channels.

Communication devices, communication methods, and communication systems capable of achieving high communication performance. suggest. [Solution] The communication device is a communication device that performs wireless communication using multiple channels, and comprises a generation unit that generates multiple bit sequences with different contents by applying a predetermined encoding process based on a predetermined error correction coding scheme to a transmission data sequence, and a distribution unit that distributes the multiple bit sequences to the multiple channels.

The application discloses a 4G three-card single-waiting method and system applied to a monitoring camera, belongs to the technical field of SIM card communication, and specifically comprises the following steps: a multi-card virtual bearing layer is constructed; the multi-card virtual bearing layer is based on historical signal tracks of three SIM cards, environmental electromagnetic disturbance trends and base station congestion prediction results of a target area, link stability scores of the SIM cards are calculated in real time, a target SIM card currently used preferentially is automatically determined according to the scores, video streams collected by the monitoring camera are divided into continuous small segments, each segment is attached to error correction coding and card segment binding identification, and when it is detected that the link stability score of the target SIM card decreases to below a threshold value, the next video segment is switched to a standby SIM card with the highest score to be output; the application can maintain the continuity of video backhaul under complex electromagnetic environments, cross-region mobile scenes and base station congestion changes, and reduce the probability of interruption of monitoring pictures.

In one embodiment, a first codeword is generated by error correction encoding a first individual payload, and a second codeword is generated based on bits associated with a second individual payload, the bits interleaving with bits associated with the first individual payload. Another embodiment includes encoding individual payloads by, for example, low density parity check (LDPC) encoding to generate encoded bits, the encoded bits including a first encoded bit generated by encoding a first individual payload, and a second encoded bit generated by encoding a second individual payload, where the encoded bits include a first encoded bit generated by encoding the first individual payload, and a second encoded bit generated by encoding the second individual payload, where the encoded bits include a first encoded bit generated by encoding the first individual payload, and a second encoded bit generated by encoding the second individual payload. The bits associated with the first individual payload are combined with the second individual payload. The first codeword and the second codeword each include encoded bits based on bits associated with the first individual payload. The first codeword in these embodiments may be decoded independently of the second codeword, and may also be decoded in conjunction with the second codeword.

The invention provides a ciphertext classification model anti-attack method introducing error correction codes. The method comprises the following steps: performing redundant information addition processing on original ciphertext data through an ECC (Error Correction Code) scheme; inputting the current adversarial sample into the target ciphertext classification model for forward propagation, and then calculating a model output result and a loss value of a real encryption algorithm label; solving the embedding gradient of the loss value relative to the current adversarial sample through back propagation; combining gradient income, cost and ECC residual error correction quota to construct a comprehensive evaluation index, and screening an optimal character for replacement to generate a candidate confrontation sample; the disturbance amplitude of the candidate adversarial sample is verified through the Hamming distance, and if the disturbance amplitude exceeds the maximum ECC error correction capability, discrete ECC safety projection is executed for constraint, and a new adversarial sample is obtained; and the confrontation sample with successful deception model is verified at the receiving end. According to the method, the integrity and the concealment of communication data are kept while the attack is effectively resisted.

The invention discloses an electric energy meter data adaptive fragmentation transmission communication method and system based on multi-dimensional perception, and the method comprises the steps: enabling an intelligent electric meter to extract the fingerprint stability characteristics of a power supply voltage waveform, detecting a load switching edge event, generating perception data, and uploading the perception data; the concentrator generates a channel quality map reflecting a physical channel state of a power grid according to sensing data of each electric meter, and generates and issues a dynamic fragmentation strategy parameter defining a corresponding relation between a channel quality grade, a network load grade and a recommended fragmentation size and an error correction coding scheme in combination with a real-time network load state; the intelligent electric meter generates a final transmission strategy according to the voltage fingerprint characteristics, the load event and the strategy parameters in combination with the key level of the to-be-transmitted data; processing to-be-transmitted data into fragments according to the strategy, and sending the fragments; the concentrator receives and decodes the data fragments to obtain reading data. The method can be adaptive to channel and network changes, and the copying and reading reliability and efficiency are improved.

In some examples, a system groups a multitude of blocks of coded data into first segments, where each first segment comprises several blocks from the multitude of blocks, and the coded data is based on the application of a deletion correction coding to input data. The system stores the first segments in corresponding error domains of a first set of error domains in a first deletion correction configuration, where the first deletion correction configuration allows error recovery in response to lost coded data in a specified number of error domains. The system transitions from the first deletion correction configuration to a second deletion correction configuration by reorganizing the first segments into second segments, where each second segment comprises a different number of blocks of coded data than a first segment.

At least one aspect of the technical solutions is directed to a system. The system can include a first access point configured to generate a preamble for a network packet of a wireless local area network (WLAN). The first AP can be configured to include, into the common field of the preamble, one or more basic service sets (BSS) colors associated with the first AP and the second AP. The first AP can be configured to include, into a subfield of the user field for indicating error correction coding, an indication of association of the client device with the first AP or the second AP based on the one or more BSS colors. The first AP can be configured to transmit the network packet to be processed by the client device for CBF communication of the network packet according to the one or more BSS colors and the indication.

A communication method and apparatus, belonging to the technical field of communications, in the method, M reference signals are segmentally indicated by information (such as first information) obtained by a terminal through error correction coding. When a terminal sends M reference signals to a network device on a scheduling-free resource, the M reference signals may change due to interference between different users when received by the network device. However, the indication information of the reference signals is obtained through error correction coding, so that the network equipment determines the information used for indicating the reference signals according to the received reference signals, and performs error correction decoding on the information so as to recover and obtain the first information. Therefore, the network equipment can decode the scheduling-free transmission through the first information, so that decoding can still be performed when pilot frequency resources of different users for the scheduling-free transmission have conflicts.

The invention discloses a discrete fragmentation transmission method and system for an under-secret meteoric trail channel, and the method comprises the steps: a transmitting end builds a communication link with a receiving end through employing an active blind detection mechanism, and locks a communication frequency point; the method comprises the following steps: after a communication link is established, a sending end performs deletion error correction coding on original data to be transmitted to generate a coded data stream, splits the coded data stream into a plurality of independent discrete fragmented data, and transmits the data on a locked communication frequency point according to a set sequence; the receiving end performs integrity verification on each piece of received discrete fragmented data and requests the sending end to retransmit the current discrete fragmented data when the verification fails; and the receiving end recovers the original data in a cross-window accumulation mode. The utilization rate of the weak under-secret meteor channel can be greatly improved, the waiting time of a communication system is effectively shortened, and the reliability of the system is improved.

The invention belongs to the technical field of communication, and particularly relates to an interphone remote communication method and system, and the method comprises the steps: carrying out the framing processing of a collected original voice signal at a source end interphone, and generating a voice frame sequence with a fixed time length; performing forward error correction coding on each voice frame and adding a timestamp mark to form a coded voice packet with a time sequence identifier; injecting the coded voice packet into a multi-hop network formed by a plurality of relay nodes, and executing dynamic path selection and voice packet priority scheduling based on link state prediction at each relay node; according to the system, forward error correction coding voice frames with timestamps are introduced at a source end, dynamic path selection based on link state prediction and voice frame priority preemptive scheduling are implemented in a relay network, and a multi-path redundancy receiving and missing frame interpolation reconstruction mechanism based on linear predictive coding are adopted at a destination end. And transmission time delay and jitter accumulated in the multi-hop forwarding process are effectively eliminated.

A memory controller for a (dynamic random-access memory) DRAM die having m DRAM banks. The memory controller includes: an ECC engine configured to provide error correction for the plurality of DRAM banks, wherein the ECC engine includes: an encoding system configured to provide error correction coding (ECC) coding redundancy to a data component and generate an ECC codeword; and a partitioning system configured to partition the ECC code word into m segments for storage in the m DRAM banks, wherein a first subset of the m segments each include a portion of the data segment and a portion of the ECC coding redundancy, and a second subset of the m segments each include only ECC coding redundancy.

A method has the step of: transmitting a downlink control information message for scheduling an uplink or downlink transmission of a plurality of data pieces of a plurality of traffic types in a single data block via a communication resource, the plurality of traffic types comprising a first traffic type for transmission via a first portion of the communication resource and a second traffic type for transmission via a second portion of the communication second resource.

The invention relates to preamble signaling for multiple access point coordinated beamforming using error correction coding subfields. At least one aspect of the technical solution relates to a system. The system may include a first access point configured to generate a preamble for a network packet of a wireless local area network (WLAN). The first AP may be configured to include one or more basic service set (BSS) colors associated with the first AP and a second AP into a common field of the preamble. The first AP may be configured to include, based on the one or more BSS colors, an indication of an association of a client device with the first AP or the second AP into a sub-field of a user field indicating an error correction code. The first AP may be configured to transmit the network packet for processing by the client device according to the one or more BSS colors and the indication for CBF communication of the network packet.

The invention discloses a privacy protection-oriented anonymized data watermarking method and device and a medium, and relates to the field of privacy protection, and the method comprises the steps: encrypting to-be-embedded original watermark information, and generating encrypted watermark information; performing error correction coding on the encrypted watermark information to obtain a watermark coding sequence, and converting the watermark coding sequence into a Gray code sequence; sorting the data records in the original anonymized data set based on preset attributes to obtain a plurality of record groups; based on the segmentation numerical value of the Gray code sequence, determining the number of records needing to be modified in each record group; and randomly selecting the data records corresponding to the number, and modifying the selected data records to generate the anonymized data containing the watermark. By combining cryptographic encryption, error correction coding and a data modification mechanism keeping anonymization, reliable traceability of illegal distributors is realized on the premise of ensuring that the data anonymization level is not reduced, so that an effective balance mechanism is established between data sharing and privacy security.

The application discloses a kind of check concatenation polar code construction method and system suitable for under interference channel, belong to error correction coding technical field.The application is first according to the received sequence of being interfered, the interference degree of polar code subchannel is analyzed, is divided into three kinds of interference degree, and finds the recursive law of the interference degree of polar code subchannel from transmission subchannel interference degree;Then, based on the interference degree analysis of polar code subchannel, check relationship is constructed;Finally, according to the check relationship, the check concatenation polar code for interference is constructed.Such, the application is improved to the encoding mode of polar code in sending end for interference channel, i.e.based on the interference degree of subchannel, the check concatenation polar code for interference is constructed, to improve the anti-interference ability of polar code.Experiment proves that the performance of the application is improved by 0.5dB-0.75dB compared with the performance of traditional polar code under interference channel, and with the increase of signal-to-noise ratio, the improvement will be more significant.

The application relates to a fast frame synchronization method, device and equipment for a Beidou navigation signal and a medium, and relates to the technical field of Beidou satellite navigation. The method comprises the following steps: performing subframe synchronization code sliding matching on a navigation data bit stream of a Beidou navigation signal output by a carrier loop and subjected to bit synchronization, and determining the starting position of a subframe of the Beidou navigation signal; performing three times of BCH checking on the first two words of the subframe according to an error correction coding scheme combining the interleaving technology and the BCH coding adopted by the Beidou navigation signal; if any time of the BCH checking is passed, then performing within-week time and subframe number checking on the first two words of the subframe; if the within-week time and subframe number checking is passed, then completing the subframe synchronization of the Beidou navigation signal; otherwise, re-executing the subframe synchronization code sliding matching until the subframe synchronization is completed. By adopting the method, the subframe synchronization time of the Beidou navigation signal can be significantly reduced, and the reliability and accuracy of the subframe synchronization can be greatly improved.

This invention discloses a data management system based on UAV mapping, specifically relating to the field of data management technology. It involves collecting UAV mapping data and performing spatial coordinate registration and unified encoding; dividing spatial regions based on terrain elevation variation coefficient and obstacle projection coverage to obtain high-density and low-density verification zones; calculating the feature matching degree of overlapping areas in adjacent frames using a local feature matching algorithm for the high-density verification zone, and outputting first correction data; performing data compensation using spatial interpolation and cubic spline interpolation for the low-density verification zone to generate second correction data; generating a full-scene reconstruction data frame based on the first and second correction data; allocating regional weight factors based on the full-scene reconstruction data frame, performing differential error correction encoding, and outputting UAV mapping results data, effectively improving the spatial adaptability of data verification and enhancing the overall accuracy and completeness of UAV mapping data.

The application discloses a large model generated content tamper-resistant watermarking method based on semantic steganography, which comprises the following steps: extracting core semantics from an original text to generate a semantic fingerprint, and performing error correction coding on the semantic fingerprint to obtain a watermark bit sequence; dividing the text into multiple text blocks; through iteration, generating a semantic space geometric partition for each text block according to a secret key and the semantic history of all previously processed blocks through a pseudo-random process; and using a large language model to perform constraint rewriting on the text block, so that the semantic vector of the rewritten text block falls into the geometric partition specified by the current watermark bit, until all bits are embedded. The application realizes strong robustness against interpretation attacks by implanting the watermark into the semantic space, and based on the context-dependent mechanism of the hash chain, any tampering will cause a chain of errors, thereby locating the tampered position, and providing an effective technical means for integrity verification and copyright protection of the large model generated content.

The application discloses a biological identity key generation method and system based on multi-source gene data and application thereof, relates to the cross field of bioinformatics, cryptography and computer technology, and aims to solve the problems of non-endogenous, easy forgery, privacy leakage and poor compatibility of traditional biological identity recognition technology. The method specifically comprises the following steps: constructing an identity molecule marker set (IMMS) and adapting different scenes through multi-source gene data acquisition technology; carrying out digital coding, fault-tolerant error correction coding and sequence standardization splicing on the genotype data, and combining an encryption hash algorithm to generate a GBBK; designing a privacy protection verification mechanism based on error correction decoding, hash verification and zero-knowledge proof, and integrating Internet of Things and block chain technology to realize whole life cycle management of biological asset identity. The application can be applied to the fields of biological asset right confirmation, traceability, genetic resource management and financialization, and has the advantages of uniqueness, stability, security and universality, thereby providing a core trust basis for related industries.

This application discloses a data transmission method and electronic device, relating to the field of data transmission technology. In this method, when the host transmits data to the slave device, error correction coding is used to perform error correction coding on the data before transmission. During data transmission, error correction codes can be used to recover erroneous data. The error correction code control parameters are dynamically adjusted by the error correction capability adjustment parameters fed back by the slave device during the error correction decoding process, thereby changing the error correction capability of the error correction encoding and decoding to adapt to different levels of interference from the external environment, thereby improving the accuracy of I3C device data transmission in complex environments and improving I3C data transmission efficiency.

To provide a radio communication apparatus and a communication method capable of transmitting control information indicating a modulation system for each spatial stream.SOLUTION: The wireless communication apparatus 400 includes a communication control unit 401 configured to generate first control information, and a wireless transmission unit 403 configured to transmit the first control information, wherein the first control information includes at least information indicating a modulation scheme and an error correction coding rate (MCS), information indicating the number of spatial streams (NSS), and second control information, the second control information is information indicating whether modulation schemes applied to respective spatial streams are all the same, and when the second control information indicates that the modulation schemes applied to the respective spatial streams are not all the same, the first control information includes third control information. The reference modulation order is a modulation order of the modulation scheme indicated by the MCS.SELECTED DRAWING: Figure 4

The application relates to the field of audio transmission technology and discloses an FD-CAN bus audio composite data stream transmission method and system. Three types of real-time multi-modal parameters, including audio content features, bus physical features and service quality constraints, are acquired, an audio dynamic complexity coefficient is calculated according to audio instantaneous energy and spectral flatness, a bus transmission quality coefficient is calculated according to bus instantaneous load rate and signal-to-noise ratio, the maximum transmission delay allowed is obtained according to service quality and signal-to-noise ratio, a dynamic scheduling priority coefficient is acquired in combination with the bus transmission quality coefficient, a time-frequency-space multi-modal coupling matrix is constructed based on the three types of coefficients, a principal coupling feature vector is extracted through principal component analysis and a dynamic transmission strategy index value is calculated, a frame format, a modulation mode and error correction coding parameters are adaptively selected according to the index value, and the audio is sent after being packaged into an FD-CAN frame. The application solves the problems of bandwidth waste and transmission jitter caused by traditional static scheduling through multi-dimensional parameter coupling and dynamic strategy adaptation.

This invention provides an efficient parallel encoding and decoding method for BCH codes, belonging to the technical field of BCH encoding and decoding circuit implementation in the areas of memory and error correction coding. Unlike previous lookup table methods, for an (n, k, t) BCH code with an n-bit codeword length, k data bits, and t-bit error correction capability, this invention only needs to store the values ​​of k n-k bit parity check matrix column vectors. These k n-k bit parity check matrix column vectors are then XORed with the S-synonym value for t rounds. The error pattern corresponding to the received codeword is obtained from the bitwise XOR value and corrected. This invention is a hardware-level encoding and decoding implementation, which can be completed within one clock cycle, reducing the multi-cycle decoding delay caused by iterative algorithms, achieving parallelization of BCH encoding and decoding, simplifying the encoding and decoding process, and reducing resource consumption.