31 results about "Short Code" patented technology

A method of using at least an attempt to measure a short-code-phase signal includes: listening, at an apparatus, for a first signal from a first signal source to determine a first measurement result, the first signal having a first code sequence that is shorter than a second code sequence of a second signal from the first signal source; and determining, at the apparatus and based on the first measurement result, at least one of a signal environment of the apparatus, an indication of time, a Doppler shift of the first signal, whether a first phase of the first signal is consistent with a second phase of the second signal, and a combination of the first measurement result and a second measurement result that comprises a measurement of the second signal.

Encoding of geometric prediction modes with template matching is implemented with embodiments of improved encoding and decoding. In one embodiment, the intra mode index and the partition mode are collectively encoded, allowing the uniquely generated index to be classified and the index with less cost to be encoded over a shorter code length. In another embodiment, classification of intra prediction modes of allowed intra geometric partition modes is based on template matching costs, so that the cheapest mode is encoded with fewer bits.

According to the display content sharing method and system provided by the invention, when the display content is shared, the sharing vehicle side converts the display content resource into the resource coding configuration set through coding standardization to upload the resource coding configuration set, so that the occupation of the shared content on cloud resources is reduced. And the shared vehicle end can reproduce the display content of the sharing vehicle end only by inputting the request short code. A unique short code is used for replacing a display content file for display content sharing, conversion from file transmission to short code interaction is achieved through display content sharing, consumption of system resources in the display content sharing process is reduced, display content sharing and reproduction operation is simplified, the data transmission amount is reduced by adopting a short code sharing mechanism, and the display content sharing efficiency is improved. The data transmission time is shortened, the sharing efficiency is improved, and the user experience is improved.

Methods, error correction circuits, and circuit modules using error correction circuits are provided for performing co-bit calculations for error correction by means of circuit complexity reduction. Methods and related devices for co-bit computations for error correction by means of circuit complexity reduction are provided. The method comprises: in an error correction circuit using a predetermined error correction code, configuring a first group of XOR operational circuits in a plurality of XOR operational circuits corresponding to a predetermined codeword length, rather than all XOR operational circuits in the plurality of XOR operational circuits, so as to reduce the circuit complexity of the error correction circuit and improve the error correction efficiency of the error correction circuit. Wherein the first set of XOR operational circuits may be a set of optimized XOR operational circuits implemented based on co-located bit coverage reduction; and performing the co-bit calculation using the first set of XOR operational circuits for error correction corresponding to a shorter codeword length, where a smaller XOR operand and a shorter critical path length can be achieved.

The invention relates to a short code length QC-LDPC (Quasi-Cyclic Low-Density Parity-Check) code construction method based on a Stanley sequence and a genetic algorithm. According to the method, a Stanley sequence is used for forming first two rows of an index matrix meeting the condition that no four rings exist, then a genetic algorithm is used for searching a third row element which enables the index matrix to meet the requirements that the ring length is at least 8 and the number of trap sets is small, and therefore the index matrix with the girth length being at least 8 is obtained, the genetic algorithm can guarantee that the number of the trap sets is minimum, and the number of trap sets is small. And finally, the index matrix is expanded to obtain a parity check matrix of the index matrix, so that four rings and six rings do not exist in a Tanner graph of the check matrix, the number of trap sets is small, the storage space required by code words is small, and hardware implementation is easy. Simulation shows that compared with an HS-QC-LDPC code, an MT-QC-LDPC code and an SES-QC-LDPC code which have the same code rate and code length, the SS-QC-LDPC code constructed by the method has the advantages that the net coding gain is improved to a certain extent, and the constructed SS-QC-LDPC code has better waterfall region performance in a high signal-to-noise ratio region and has no obvious error leveling phenomenon.

A method of using at least an attempt to measure a short-code-phase signal includes: listening, at an apparatus, for a first signal from a first signal source to determine a first measurement result, the first signal having a first code sequence that is shorter than a second code sequence of a second signal from the first signal source; and determining, at the apparatus and based on the first measurement result, at least one of a signal environment of the apparatus, an indication of time, a Doppler shift of the first signal, whether a first phase of the first signal is consistent with a second phase of the second signal, and a combination of the first measurement result and a second measurement result that comprises a measurement of the second signal.

The invention discloses a vehicle trajectory prediction method based on an improved HTM, and the method comprises the steps: compressing an original code into a short code through multi-dimensional feature fusion, carrying out the feature extraction of a space pool through an SPLSN (micro-column self-recommendation space pool module), and achieving the time pool time sequence modeling through a TPLLAA (position sensing time pool module). And multi-path input expansion is realized by introducing a sequence caching mechanism. According to the multi-dimensional compression coding method, the sparse distribution representation is generated by fusing grid, time period and category coding, so that the data redundancy can be reduced, and the calculation complexity can be reduced; graded activation and synaptic protection can be realized by combining a micro-column self-thinning space pool module with a bearing degree and an overlapping value, and the efficiency and the accuracy are improved; tPLLA is utilized, position information is introduced to optimize cell selection, and an active set is reduced to inhibit historical interference; and by utilizing an SSCM (sequence state cache) mechanism, multi-track parallel processing and quick context retrieval can be supported, and the real-time processing capability is improved.

This invention discloses a short code encoding structure and an embedded secure transmission method using this structure, applicable to wireless encoding / decoding technology and automatic control fields. The method includes: using a preset number of equal-width high and low level pulses as a starting segment, connecting a 2ms-8ms wide high-level pulse, followed by sequentially connecting an identification code, an address code, a data code, and a check code; for the discrimination of "0" and "1" signals, specifically: 1 high n low is defined as signal "0", n high 1 low is defined as signal "1", and all other cases are considered invalid data; wherein, the value of n is as follows: when the code length requirement is higher than a preset threshold, n = 2; when the code length requirement is lower than the preset threshold, n > 2. This invention achieves better secure transmission, reduces power consumption, reduces the bit error rate, meets the low power requirements of small devices, and reduces CPU overhead and system power consumption costs.

The application relates to the communication technical field, and discloses an encoding method, a decoding method, a communication device and a communication system. Based on the method, the error correction performance and the decoding performance under a medium or short code length are improved by twice lifting of a base matrix. Since the element value of the second base matrix after the first lifting is modified, flexible matrix design is realized, the orthogonality between rows of the base matrix is improved, and the error correction performance and the decoding performance are further improved.

This invention relates to airspace coding, specifically to a multi-level unified coding system for low-altitude airspace. The system includes a coding hierarchy architecture module, which designs and constructs an eight-level coding architecture from the national level to the building level; a coding inheritance and short code setting module, which designs inheritance logic to achieve reversible traceability of codes and designs short code rules to improve coding efficiency; a coding fusion module, which combines a planar coordinate framework and altitude coding to achieve integrated coding of planar and altitude spaces; a coding splicing and storage module, which designs coding splicing rules, file naming conventions, directory hierarchy structures, and unified attribute fields to facilitate system storage, parsing, front-end loading, and spatial indexing; and a multi-standard compatibility module, which establishes compatibility conversion rules between grid data and various existing standards to ensure seamless integration with existing industry data systems. The technical solution provided by this invention overcomes the shortcomings of achieving accurate low-altitude airspace division, efficient traceability, and cross-industry data interoperability.

1. The name of the design product: Morse code card (short code). 2. The use of the design product: the font writing of short code and the demonstration of corresponding Morse code symbols. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: main view of component 2. 5. The design product is a thin product, and the left view, right view, top view and bottom view of components 1 to 11 are omitted.

The application discloses a short code-based large-scale MIMO network service quality guarantee method and system, relates to the technical field of communication, and comprises the following steps: modeling the asymptotic behavior of the outage probability based on the large-scale MIMO signal, obtaining the outage probability; modeling the tail behavior of the outage probability by using the large deviation principle, describing the relationship between the outage probability index and the outage probability; updating the outage probability index; modeling the tail behavior of the short code error rate by using the large deviation principle, describing the asymptotic short code error rate service quality guarantee index under the condition of high signal-to-noise ratio based on the short code error rate service quality guarantee index; updating the asymptotic short code error rate service quality guarantee index; and obtaining the joint delay and reliability service quality guarantee index according to the updated outage probability index and the updated asymptotic short code error rate service quality guarantee index. The application can improve the service quality of the network.

The present application provides a video compression method and device for dynamically adjusting the position of elements of a recent motion vector array in inter-frame prediction coding. The method and device effectively reduce the number of bits consumed in coding motion vectors and greatly improve coding efficiency by dynamically adjusting the elements of the motion vector array with high occurrence frequency to a specific part of the motion vector array and using a short code word to represent the storage address of the specific part.

The invention discloses a specific field text file custom dictionary auxiliary Huffman compression method and system, and belongs to the technical field of data compression. The method comprises the following steps: receiving and verifying a phrase-short code mapping dictionary customized by a user, and ensuring that the length of a short code is smaller than that of an original phrase and ambiguity is not generated; sorting the dictionaries in a descending order according to the phrase length to form a replacement priority queue; performing phrase-to-short code replacement on the text according to a priority sequence by adopting a block processing strategy; carrying out character frequency statistics on the replaced text and constructing a Huffman tree; generating a code based on a Huffman tree, and converting the text into a bit stream; and generating a structured compressed file containing the metadata area, the dictionary information area and the compressed data area. The system comprises a dictionary management module, a text replacement module, a Huffman coding module and a file storage module. According to the method, field specific dictionary preprocessing and Huffman coding optimization are combined, a repetition mode of a specific field text is fully utilized, and the high compression rate of 70%-80% is achieved and is far higher than that of a general algorithm by 40%-60%.

The embodiment of the invention provides a communication method and a communication device. A method includes transmitting a retransmission including one or more cross-CB code blocks, the cross-CB code blocks including a first cross-CB code block generated by encoding a portion of information bits of the CB according to an LDPC code, the retransmission having a code rate lower than a code rate of the initial transmission. Therefore, the receiving device can decode the cross-CB code block in the retransmission of this time. If the cross-CB code block is successfully decoded, the portion of information bits may be considered as frozen bits, which enables the remaining information bits in the last (re-) transmission to be decoded at a lower CR. Embodiments may reduce decoding complexity and improve retransmission performance by decoding a plurality of short codewords.

The application discloses a kind of railway three-dimensional geological space intelligent route selection method and system based on multi-source data fusion, which comprises the following steps: establishing graphic database, creating external database and preprocessing, constructing the three-dimensional entity model of geological body;Based on the graphic template selected by user, the parameter variables of entity object are associated with related design parameters, the track line is obtained, the control point is loaded, the control point is inserted at the specified position and the short code is entered, and the short code corresponds to the geological disaster risk level, the stability of rock-soil mass, the geological safety evaluation information of line crossing area;The track line is obtained, and if the data layer graphic template is selected, the intelligent route selection algorithm layer linkage is executed, and the optimal line scheme is output. By establishing graphic database and external database, fusing multi-source geological, remote sensing and topographic data, constructing three-dimensional geological entity model, and combining graphic template and control point mechanism, the intelligent route selection of railway line is realized.

The present application relates to the technical field of data processing, more particularly, the present application relates to a kind of data storage method and system of intelligent electric meter, the data storage method includes: obtaining the power consumption of electric meter, constructs initial sequence, and according to the frequency of each power consumption occurrence from high to low order, select the first preset number of power consumption and form high-frequency power consumption sequence according to time sequence;The high-frequency power consumption sequence is carried out sliding window processing, and all continuous subsequences are extracted as a power consumption combination respectively, and the attention of power consumption combination is calculated.The present application extracts high-frequency and regular power consumption combination, which is included in the coding unit, to build a more efficient initial code table;At the same time, the change stability evaluation mechanism is introduced, the matching degree of new data and historical mode is judged, when the power consumption mode mutation is detected, the huffman tree node structure is dynamically adjusted, so that the new mode obtains shorter code, thereby improving the compression efficiency.

The invention aims to provide a unique identifier generation method and system based on a national cryptographic algorithm, electronic equipment and a storage medium. The method comprises the following steps: S100: obtaining an original character string and a salt value; s200, calculating a hash value according to the original character string and the salt value by adopting a national cryptographic algorithm; s300, mapping the hash value into a readable character; and S400, intercepting the readable character into a unique identifier with a fixed length. According to the method, the SM3 cryptographic algorithm is adopted, security vulnerabilities of traditional algorithms such as MD5 and SHA1 are avoided, the requirements of cryptographic compliance are met, and the method can be applied to multiple fields such as electronic bills, digital certificates, supply chain tracing, invitation codes and block chain transaction short codes.

The present application relates to the technical field of wireless communications, and provides a coding method and apparatus and a decoding method and apparatus, which are used to improve the error correction performance of coding. The method comprises: a first communication apparatus acquires a first sequence, the first sequence being a bit sequence to be coded, the first sequence comprising K0 information bits, C1 first check bits, and C2 second check bits, (C1+C2) being greater than 0, C1 being greater than or equal to 0, and C2 being greater than or equal to 0; and the first communication apparatus performs parity check polar coding on the first sequence, K0 being within a first length range, the first length range being [K1, K2], K2 being an integer greater than 19, and / or K1 being an integer less than 12. On the basis of the solution, the scope in which PC-CA polar is supported is broadened, thereby improving the range of applicability of the PC-CA polar in short error-correction code scenarios.

The application provides a throughput improvement method based on power allocation for MIMO-URLLC short code transmission, comprising the following steps: step 1: based on a multi-user MIMO communication scenario, encoding a sending symbol vector and modeling a channel, introducing an additive white Gaussian noise to obtain a receiving signal at a user end; step 2: obtaining a signal-to-interference-and-noise ratio of each user and an achievable rate expression in a limited code length domain through the receiving signal at the user end, taking power allocation as a variable, constructing a target function expression about the throughput of each user and the total throughput of the system, so as to clearly define the optimization problem of the total throughput of the system; step 3: performing convex approximation on the target function constructed in step 2 to obtain an optimization target function, and solving the optimization target function to output a final power allocation configuration. According to various specific parameters of the communication scenario, the power allocation of the sending end is optimized, so that the purpose of effectively improving the total throughput of the system is achieved.

The invention provides a dynamic code array generator based on BCH coding. The dynamic code array generator comprises a dynamic factor matrix generation module, an original dynamic code array generation module, a layered BCH coding module and a code array formatting module. According to the method, the problems of dynamic code generation, transmission and verification in a multi-device cooperative authentication scene in a high-concurrency and high-noise environment are solved; the problems of key management redundancy, insufficient anti-interference capability and safety splitting of a traditional single-code system in the fields of industrial Internet of Things group authentication, distributed payment transaction, Internet of Vehicles V2X communication, emergency communication networks and the like are solved, different transmission formats can be adapted, and the strict requirements of short code length, low redundancy and high real-time performance are met.

This application discloses a method, apparatus, device, and storage medium for generating short links, belonging to the field of computer technology. The method includes: receiving a service request from a user terminal, the service request carrying long link information, the service request requesting the generation of N short links, where N is an integer greater than 1; generating N short codes based on a continuous factor, a random factor, and the long link information, each short code being a string, the continuous factor including a first string sequence comprising N regular first strings, and the random factor including N random second strings; performing deduplication processing on the N short codes, and generating N target short links based on the deduplication result, thereby reducing the probability of hash collisions in scenarios with a large number of short link requests and improving the effectiveness of the short links.

The application relates to a short code optimization method of intra-pulse-inter-pulse joint constraint, and belongs to the field of radar signal processing. According to current distributed radar transmission system and system requirements, long code and short code mathematical representations of a two-phase code waveform signal model are established; based on the long code and short code mathematical representations, radar transmission waveform target optimization functions of intra-pulse-inter-pulse joint constraint are established from intra-pulse and inter-pulse two-dimensional orthogonality; based on the radar transmission waveform target optimization functions, an immune genetic algorithm is adopted to sequentially perform initialization population, diversity evaluation, immune selection, cross and mutation and population merging on the transmission waveform; according to optimal excitation degree and average fitness as a judgment condition, a set of waveforms of intra-pulse-inter-pulse two-dimensional orthogonality optimization is designed as the transmission waveform. By adding intra-pulse-inter-pulse two-dimensional joint orthogonal constraint orthogonality, the orthogonality of the short code waveform is enhanced, and the purpose of improving the distance resolution and positioning accuracy under the detection mode of multiple radars is achieved.

The invention discloses a TLS fingerprint short code constant time auditing method, and relates to the technical field of network security. Carrying out weight assignment; performing Top-K normalization; generating a short code; constant time judgment; carrying out collision back-off; online updating is carried out; according to the method, core features are extracted through weight Top-K normalization, short codes are generated through non-encrypted hash, O (1) constant time judgment is achieved through the double Bloom filters, time and space efficiency of TLS fingerprint auditing is remarkably optimized by combining collision rollback and an online hot update mechanism, most of invalid matching is reduced through a black and white list rapid judgment path of the double Bloom filters, and the method has the advantages of being high in reliability and high in reliability. The collision fallback mechanism is matched to consider both accuracy and efficiency.

The invention provides a coding and decoding method and device, is used for improving the error correction performance of coding, and relates to the technical field of wireless communication. In the method, a first communication device acquires a first sequence, the first sequence is a bit sequence to be coded, and the first sequence comprises K0 information bits, C1 first check bits and C2 second check bits. Wherein C1 + C2 is greater than 0, C1 is greater than or equal to 0, and C2 is greater than or equal to 0. The first communication device performs parity check polarization coding on the first sequence; k0 belongs to a first length range, the first length range is [K1, K2], K2 is an integer greater than 19, and / or K1 is an integer less than 12. Based on the scheme, the support range of the PC-CA polar is expanded, so that the coverage range of the PC-CA polar in a short code area can be improved.

The invention relates to a sliding window mixed list decoding method and device for a spatially coupled LDPC (Low Density Parity Check) code, and the method comprises the steps: initializing decoding input; initial iteration BP decoding is carried out, and a hard decision result of the coding bit of the subcode to be moved out of the current window and a verification result of the subcode are acquired; judging whether the first window meets a corresponding condition or not to obtain a first judgment result, and determining an execution strategy corresponding to the space coupling LDPC code; decoding input is reset, a decoding input list is constructed, list iteration BP decoding is carried out, whether decoding output meets corresponding conditions or not is judged, and then corresponding operation is executed to generate a final decoding result. Therefore, the problems that the traditional sliding window BP decoding performance is limited, and the traditional list BP decoding method and the list construction method thereof cannot be directly used for sliding window decoding of short codes in SC-LDPC are solved.

The application provides a material attribution type short chain generation method based on a pseudo-random hash algorithm, and relates to the technical field of electric digital data processing. The method comprises the following steps: normalizing and splitting a link service data to generate a plurality of material attribution units and construct offline material attribution basic records; encoding and mapping the offline material attribution basic records to generate a service short code and encapsulate the service short code with a material receiving mark to generate a UrlLink access entrance; performing material paving confirmation and attribution state determination on a material to be paved to obtain a material attribution state determination result and perform state solidification processing on the plurality of material attribution units to generate an activated material attribution short chain; and performing matching verification on a UrlLink receiving field to obtain a matching verification result and generate a branch jump decision instruction to perform a jump operation, so as to realize accurate attribution association of offline material delivery and online access entrance, and improve the attribution recognition ability and data tracing ability of the material attribution short chain.

The invention discloses a large-scale MIMO network service quality guarantee method and system based on a short code, and relates to the technical field of communication, and the method comprises the steps: carrying out the modeling of an asymptotic behavior of an outage probability based on a large-scale MIMO signal, and obtaining the outage probability; by adopting a large deviation principle, carrying out modeling on the tail behavior of the outage probability, and describing a relationship between an outage probability index and the outage probability; updating the outage probability index; the method comprises the following steps: modeling a tail behavior of a short code bit error rate by adopting a large deviation principle, and describing a service quality guarantee index of an asymptotic short code bit error rate under the condition of a high signal-to-noise ratio based on the service quality guarantee index of the short code bit error rate; updating the service quality assurance index of the asymptotic short code error rate; and according to the updated outage probability index and the updated service quality assurance index of the asymptotic short code bit error rate, obtaining a joint time delay and reliability service quality assurance index. The invention can improve the service quality of the network.

The invention discloses a data synchronization method, and relates to the technical field of data processing. A specific embodiment of the method comprises the following steps: after a message sent by a target system is received, judging whether a corresponding commodity message exists in a target cache, and when the corresponding message does not exist, sending a decoupling message to a message queue and storing the corresponding commodity message. And after the building data of the store is acquired, acquiring the short code of the target commodity based on the stored decoupling message, and sending the short code to the target system for the target system to update the short code of the commodity. According to the embodiment, the synchronization efficiency of the commodity short code data is improved, and the updating reliability is guaranteed.