57 results about "Short Code" patented technology

The invention relates to the technical field of wireless communication, and provides a short code RM coding method and device based on a multipath channel, a medium and a program product, in the method, RM coding redundancy bits are increased in groups to resist deviation of a related maximum value and an ideal position caused by symbol offset brought by other secondary path delays; meanwhile, as the spread spectrum can expand the signal on a relatively wider frequency band and can reduce the propagation problem caused by multipath and attenuation, the spread spectrum processing is carried out on the data after the RM redundant coding is carried out, so that the sent information has very strong anti-multipath capability, and the performance of RM coding and decoding in a multipath environment is greatly improved.

The invention discloses a high-performance short-chain short-code generation method, which relates to the field of short-chain short-code services and comprises the following steps of: 1, defining composition of a character set, creating a CHARSET character string for assignment, recording the total number of characters by adopting a counter, and updating character count and storing a unique character by traversing the character set; according to the method, the composition of a character set is clearly defined, the length of the short code is fixed, the consistency and predictability of the generated short code are ensured, a unique initial value is allocated to each machine by utilizing an INCR command of Redis, a BitSet with the length of 10000 is created to manage a natural number sequence number, and the real-time performance of the machine is improved. A natural number serial number is effectively and systematically restored to an arrangement with a specified length n through Cantor expansion inverse operation, an index of an element is calculated by utilizing factorial assistance, so that a next element to be placed can be quickly found in a given arrangement, and calculation burden during short code generation is reduced by pre-calculating a factorial value and caching a result; the operation efficiency is improved.

The invention discloses an LDPC code check matrix construction method and device, and the method comprises the steps: constructing an initial basis matrix based on a finite field, determining a girth extension matrix based on a density evolutionary algorithm and an LDPC code construction algorithm, carrying out the multiplication and superposition of the initial basis matrix and the girth extension matrix, and determining a candidate check matrix. By multiplying and superposing the two matrixes, the distribution of non-zero elements in the initial basis matrix can be improved, so that the sparsity of the initial basis matrix is stronger, and the breaking of short rings and the expansion of girth in the initial basis matrix are realized. And finally, for each element in the candidate check matrix, performing matrix hash extension on the element according to the element value of the element, and determining the LDPC code check matrix. The design of high-performance medium-short codes and ultra-long QC-LDPC codes is realized, and the error code flat layer is reduced while the rapid convergence of the waterfall region is ensured.

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.

A method for adaptive short code allocation of power sensing information based on information age is first constructed by N Power information sensing nodes and K The power Internet of Things perception and transmission model composed of 3 base stations is constructed, and the decoding error probability of the receiving end is determined based on the channel noise between the power information perception nodes in the model. Then, according to the decoding error probability of the receiving end, the information age model constructed with the minimum average information age as the optimization target and the information code length of the power information perception node as the optimization variable is solved to obtain the optimal allocation scheme of the information code length. The present invention can provide the optimal information code length allocation scheme in real time, improve the reliability of the perception information, and reduce the delay of the perception information.

A coding method and apparatus are provided to provide a uniform coding method for ultra short codes. The method is as follows: obtaining, by a transmit end, to-be-coded information bits; performing, by the transmit end, PC-polar coding on the to-be-coded information bits based on first constructor parameters, to obtain a coded bit sequence; and sending the coded bit sequence, where a check equation of the first constructor parameters include a first element representing a check-required information bit position and a second element representing a check bit position, the first element corresponds to a first vector in a generator matrix for PC-polar codes, the second element corresponds to a second vector in the generator matrix, and if a first Hamming weight of the first vector is the same as a second Hamming weight of the second vector, a third Hamming weight of an addition modulo 2 vector is greater than the first Hamming weight and greater than the second Hamming weight, or if the first Hamming weight is different from the second Hamming weight, the third Hamming weight is greater than a smaller one of the first Hamming weight and the second Hamming weight.

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 short code coding structure and an embedded secrecy transmission method using the same, which are applied to the field of wireless coding and decoding technology and automatic control, and the method comprises the following steps: taking a preset number of equal-width high and low level pulses as initial segments, connecting wide and high level pulses of 2ms-8ms, and then connecting an identification code, an address code, a data code and a verification code in sequence; for the judgment of the signals' 0 'and' 1 ', the specific steps are as follows: appointing 1 high and n low as the signal' 0 ', appointing n high and 1 low as the signal' 1 ', and determining the data as non-effective data under other conditions; wherein the value of n is as follows: when the code length is required to be higher than a preset threshold value, n is equal to 2, and when the code length is required to be lower than the preset threshold value, n is greater than 2. According to the invention, better confidential transmission is realized, the power consumption is reduced, the bit error rate is reduced, the low-power requirement of small equipment is met, and the CPU overhead and the system power consumption cost are reduced.

The invention provides a signal decoding method and system, a computer readable storage medium, electronic equipment and a computer program product, and relates to the technical field of communication, and the method comprises the steps: obtaining a received signal, and carrying out the modulation and demodulation of the received signal, and obtaining soft bit information; the received signal is a signal generated through finite field linear block code coding and low-density parity check coding cascade coding; performing belief propagation iterative decoding of new air interface low-density parity check on the soft bit information to obtain a code word corresponding to a low-density parity check mother code; performing bit flipping hard decision decoding on the codeword corresponding to the low-density parity check mother code to obtain a finite field linear block code codeword; and performing finite field linear block code hard decision decoding on the finite field linear block code codeword to obtain information bits after receiving signal decoding. According to the method, the success rate of finite field linear block code hard decision decoding can be increased, an error code platform in a short code scene is remarkably reduced, and decoding time delay is effectively reduced.

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.

The present application discloses a data backup method, device, equipment, medium and product. The method encodes the target data to obtain a first target code and a second target code, concatenates the first target code and the second target code to obtain a target cascade code, and saves the target cascade code so that in the event that the target data is lost, the target data can be restored through the target cascade code. Since the cascade code constructs a long code by serially cascading short codes, the length of the cascade code is less than the length of the long code constructed by a single structure and a single form of code, and therefore has the advantages of low decoding complexity, strong error correction capability and high coding efficiency. This technology can be used to solve the cache recovery problem when different nodes fall behind, and can maximize the decoding success rate under certain storage redundancy to achieve effective recovery after data loss.

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.

The invention provides a code pattern recognizer and an automatic extinction ratio control system, in the code pattern recognizer, a conversion module can output a code pattern reference signal after converting a differential input signal, a code pattern counter can count the number of overturning times from 0 to 1 in the code pattern reference signal in a sampling clock period, and the number of overturning times in the code pattern reference signal can be calculated according to the number of overturning times. The output counting result comprises information of a short code type signal, the problem of short code type signal loss is avoided, the processing module determines a final control signal and sends the final control signal to the preset automatic extinction ratio control circuit according to the counting result, a preset control reference value, and a pre-received working state identifier and a pre-received burst signal identifier, and the automatic extinction ratio control circuit outputs the control signal. The stability of loop control of the automatic extinction ratio control circuit can be 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 invention discloses a short link generation method, a server, a storage medium and a program product, and relates to the technical field of internet information, and the method comprises the steps: obtaining user information, current time and an original webpage address; inputting the original webpage address into a preset hash function to obtain a hash value of a first length; generating a pseudo-random number according to the user information and the current time; inputting the pseudo-random number into a preset index calculation formula to obtain an effective index; on the basis of the effective index, selecting a continuous character with a second length from the hash value as a hash short code; performing security review on the Hash short code to ensure that the Hash short code does not have preset sensitive vocabularies, preset easily-confused characters and / or preset known vulnerabilities; and if the result of the security review is safe, encoding the Hash short code according to a preset link generation parameter to obtain a final short link. By implementing the method, the security of short link generation can be improved.

The present invention provides a Turbo code cascade encoder and decoding method, device, and storage medium for deep space communication. The Turbo code cascade encoder includes an interleaver and two component encoders; the input end of the interleaver is connected to the input end of one component encoder, and the output end is connected to the input end of another component encoder; the component encoder is formed by cascading a Turbo code encoder and a short code encoder; the Turbo code encoder includes a first adder, a second adder, and a register module; the output end of the first adder is connected to the input end of the short code encoder and the register module; the output end of the register module is connected to the input end of the short code encoder and the second adder; the output end of the second adder is connected to the input end of the first adder. The present invention uses a method of cascading Turbo codes and short codes to design a Turbo code cascade encoder, which has a simple structure and is easy to implement in hardware, and can reduce the code rate to ensure communication performance.

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 invention provides a list-based hierarchical statistical decoding method, device, apparatus and storage medium. By obtaining a first log-likelihood ratio sequence, a first hard decision bit sequence and a first parity check matrix corresponding to a sequence to be decoded and performing a first reordering; based on the first hard decision bit sequence after the first reordering, obtaining a second hard decision bit sequence; starting from the last bit of the second hard decision bit sequence, performing a decoding path search in the reverse order, performing path expansion at each non-parity check bit and performing path update at each parity check bit to determine the path metric value of each current sub-path; selecting the sub-path with the smallest total path metric value, determining the decoded codeword corresponding to the second hard decision bit sequence, and performing sequential recovery to obtain the decoded codeword result of the sequence to be decoded, which improves the performance of the linear block code decoding algorithm in the scenario of short codes and high code rates and reduces the complexity.

The invention relates to the technical field of data fusion transmission, in particular to a data fusion transmission method and device, electronic equipment and a storage medium. Cutting the plurality of data streams, and performing data superposition processing on a plurality of arrays obtained by cutting to obtain a preprocessing coefficient and a plurality of first arrays; adjusting a plurality of parameters of the first data fusion model pair by using a plurality of first arrays to obtain a second data fusion model pair; and finally, inputting the plurality of first arrays into a second coding model to obtain a plurality of second arrays, and transmitting the plurality of target model parameters, the plurality of preprocessing coefficients and the plurality of second arrays. According to the method, the data are subjected to superposition processing, the fusion model is constructed by utilizing the superposition ratio of the data, the data with the high superposition ratio is represented by the fusion model through short codes, the length of the fused data is shortened, the total data transmission amount obtained through fusion is smaller, and the data transmission efficiency is higher.

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 present invention discloses a polar code serial offset decoding algorithm modified by a simulated annealing algorithm. The specific technical scheme is as follows: first, SC decoding is performed in units of frames, and the decoding result is subjected to CRC detection. If the detection is passed, the next frame is decoded, otherwise, it is handed over to the simulated annealing algorithm for correction; the simulated annealing algorithm calculates the corresponding initial likelihood value for the bit in a frame, and arranges the absolute value of the likelihood value corresponding to the information bit part in ascending order, and executes the simulated annealing algorithm; the result of the simulated annealing algorithm is subjected to CRC detection. If the detection is passed, the next frame is decoded, otherwise the decoding is declared to have failed. The present invention enhances the error correction capability of the polar code when the code is short, improves its reliability and maintains a low decoding delay.