782 results about "Polar code" patented technology

The present invention relates to a method by which a device transmits a signal in a communication system and the device for same, and to a method and a device for same, the method comprising the steps of: applying a pre-code to an information bit sequence so as to generate a first encoded bit sequence including an information set, a frozen set, and a parity set; additionally changing some of the information sets of the first encoded bit sequence into the frozen set and the parity set so as to generate a second encoded bit sequence corresponding to the first encoded bit sequence; applying a polar code to the second encoded bit sequence so as to generate a third encoded bit sequence; and transmitting the third encoded bit sequence.

The invention discloses an anti-turbulence free space optical communication method based on receiving and transmitting joint optimization, which balances the code length and the code rate through a Polar coding mode of an atmospheric turbulence channel, and ensures the coding and decoding overhead; meanwhile, a Transform model based on convolution enhancement is designed at a receiving end, learning of local features is enhanced through convolution, the relation between phase screen pixels is established, and a conjugate phase screen is given by the model for turbulence compensation. In order to solve the problem that in a free space optical transmission system, the atmospheric turbulence effect interferes with an OAM light beam, the influence of atmospheric turbulence interference on free space optical communication is relieved in a mode of joint optimization of the receiving end and the transmitting end. Error codes caused by atmospheric turbulence are corrected through Polar coding of the transmitting end, and the coupling efficiency of receiving light spots is improved after phase compensation of the receiving end, so that the mode purity obtained by corrected light spot images is improved, and the error rate of the system is reduced.

The invention provides an OFDM signal receiving and processing system and method suitable for an NAVDAT system. According to the method, the characteristics that NAVDAT system signals have synchronous headers, pilot frequencies and the like are fully considered, firstly, the synchronous headers are used for carrying out correlation operation on received data to search a frame starting point, and a signal frame to be demodulated and decoded is obtained in combination with a constant false alarm detection algorithm; and subsequently, carrying out symbol synchronization to determine the FFT window position. Secondly, in combination with a discrete pilot signal, estimating an integral multiple frequency offset error, namely coarse synchronization, and further realizing estimation of a decimal multiple frequency offset error, namely fine synchronization, so as to realize frequency synchronization. And then, channel estimation is carried out by using the pilot signal and adopting a least square method to obtain the channel frequency response of the pilot, the frequency response of the complete signal is obtained through interpolation, and the rough estimation result is further processed through the designed RCAFCN network to obtain accurate channel estimation, so that the original OFDM signal is recovered. And finally, extracting a data part in the OFDM signal according to a frame structure, realizing soft demodulation through a log-likelihood ratio mode, decoding data of a signaling part by using a polarization code, and decoding data of a service part by using a low-density parity check code, thereby realizing complete demodulation and decoding. The method provided by the invention can effectively reduce inter-symbol interference and inter-carrier interference existing in OFDM signals, compensate channel distortion, reduce noise influence, improve decoding precision, improve communication quality, realize optimization of NAVDAT system baseband processing, and guarantee sailing safety of ships on the sea by combining with an existing marine broadcast system.

A method for decoding polar codes based encoded data comprises receiving the polar codes based encoded data, determining a rate at which the data is encoded, based on the determined rate, selecting suitable implemented super nodes in a flexible-rate polar decoder, and decoding the polar codes based encoded data. A flexible-rate polar decoder is created by receiving polar codes corresponding to a set of desired overheads, generating, for each overhead, a binary tree using fast successive cancellation decoding, generating a unified binary tree by determining locations of super nodes within each binary tree, representing the determined locations having same node index among different binary trees as super locations in the unified binary tree, each super location including more than one super node, and implementing the unified binary tree on an application specific hardware structure to create the flexible-rate polar decoder.

A method of a transmitting device in a wireless communication system, includes: obtaining an encoded bit stream from information bits using a polar code; transmitting a first signal generated through a first modulation of the encoded bit stream; performing reverse mapping on the encoded bit stream; and transmitting a second signal generated through a second modulation of the reverse-mapped encoded bit stream.

The invention belongs to the technical field of communication, and particularly relates to a multiplication active code decoding method based on an SO-ORBGRAND decoder. The SO-ORBGRAND decoder outputs soft information by calculating a correct posterior probability of a conjecture code word sequence, and high-performance decoding is realized through soft information exchange and optimization processing between the row decoder and the column decoder. In the iteration process, a method for judging the validity of the code word through the check matrix is designed by utilizing the polarization characteristic of the multiplication active code, so that the iteration is supported to jump out in advance to reduce the complexity. The invention provides a multiplication active code decoding algorithm based on an SO-ORBGRAND decoder, and compared with various non-system multiplication active code decoding algorithms and the performance of traditional long-code polarization codes, the method has remarkable advantages in error correction performance; a method for judging the validity of the code word through the check matrix by utilizing the polarization characteristic design of the multiplication positive code is provided, the complexity is reduced while the judgment success rate is improved, and the implementation overhead is reduced.

The invention belongs to the field of star flash mouse communication, and discloses a star flash mouse low-power-consumption communication system and method based on Polar code and SLE collaborative optimization, the system adopts a layered architecture design, collaborative optimization of energy efficiency and performance is realized through deep coupling of a physical layer and a link layer, and the performance of the system is improved. The core of the system is composed of three functional units including a Polar code coding module, an SLE control engine and a cross-layer optimization interface, and a complete closed-loop control system is formed. According to the invention, through deep cooperation of the Polar code and the SLE mechanism, the overall power consumption is reduced by 42.7% compared with the traditional scheme; according to the Polar code dynamic construction method based on track prediction, an ultra-low bit error rate of 10 <-5 > magnitude can still be kept in a 2.4 GHz complex interference environment, and in combination with signal-to-noise ratio self-adaptive coding parameter adjustment, it is ensured that transmission delay within 0.5 ms is always kept from a low-speed office scene to a high-speed electronic sports scene; in the aspect of engineering implementation, the method has the capability of quickly adapting to hardware platforms of different manufacturers, and a complete solution with high performance and low cost is provided for large-scale commercial use of the satellite flash technology in the consumer electronics field.

The invention provides a polarization code optimization method for a TLC flash memory, which belongs to the technical field of polarization code optimization of an NAND flash memory, and comprises the following steps of: firstly, constructing a polarization code based on a Monte Carlo method: randomly generating code words in each simulation, coding after setting frozen bits, transmitting and reading data through a flash memory channel, counting and accumulating sub-channel error times by using SC decoding, and calculating an error probability; the information bit determination process is optimized according to P / E cycle times for flash memory characteristics; data to be stored in a flash memory are coded based on PC-CASCL, an original binary bit sequence is averagely segmented, PC codes of all sub-segments are added with check bits, after the sub-segments are combined, CRC coding is carried out through a preset polynomial, polar code coding is carried out on a result, and the result is stored in the flash memory. After the coded data is read from the flash memory, decoding is carried out through PC-CASCL, a decoder is initialized, the maximum path number is set, a path list is created, whether the bits are odd-even check bits or not is judged and checked bit by bit, and after all the bits are decoded, an optimal path is selected as output through CRC code check.

The invention relates to the technical field of coding and decoding, and discloses a DNA storage coding and decoding method and device, electronic equipment and a storage medium, and the method comprises the steps: carrying out the information filling of to-be-coded data, and obtaining a target binary sequence; encoding and mapping the target binary sequence to obtain a DNA base sequence; identifying a coding error mode of the to-be-coded data according to the DNA base sequence; and according to the coding error mode, selecting a corresponding decoding algorithm to decode the DNA base sequence to obtain decoding data. Through the implementation of the invention, data conversion and information filling are performed on the to-be-coded data, so that the length of the to-be-coded data can meet the length requirement of the polarization code; the coding error mode corresponding to the DNA base sequence is identified for decoding, the decoding accuracy can be effectively improved through different coding error modes, and lossless compiling of the to-be-coded data is realized.

The invention discloses a reliability parameter assisted low-complexity polarization code rate matching method, and belongs to the technical field of wireless communication. Aiming at the problem that a proper punching site is difficult to select during rate matching due to a recursive structure of a polar code, the invention provides a polar code punching site selection algorithm based on a reliability parameter. An information bit reliability parameter is defined to calculate the reliability of candidate punching bits, and the optimal punching position is selected by traversing and solving the minimum value of the maximum reliability parameter. In order to solve the problem of high complexity of the existing polar code rate matching method, an interleaving algorithm and a pruning serial offset list decoding algorithm based on rate matching parameter mapping are provided, secondary sorting calculation of an interleaver is avoided, and a calculation unit updating strategy of a decoder is simplified. The polarization code rate matching method provided by the invention not only can improve the rate matching coding gain, but also can effectively reduce the calculation complexity.

The invention discloses a communication method and device, relates to the technical field of communication, and can improve the decoding performance and improve the flexibility of a Polar code used for HARQ (Hybrid Automatic Repeat reQuest) transmission. The method comprises the following steps: performing polarization coding on an information bit sequence with the length of K to obtain a first sequence with the length of M0; wherein K is smaller than or equal to M0; sending Ex bits in the first sequence when the data is retransmitted for the xth time; wherein x is a positive integer, and one or more bits in the Ex bits are repeated one time or more than one time in the bits included from the initial data transmission to the xth data retransmission.

The invention belongs to the technical field of polarization codes, and discloses a large nuclear polarization code BP decoding algorithm based on a pruning permutation factor graph, and the algorithm comprises the steps: firstly, randomly generating a permutation factor graph; secondly, deleting nodes with low contribution degree and non-contribution degree to decoding through pruning operation; and when the stop condition is not met, replacing the factor graph to execute BP decoding of the pruned and permutated factor graph until the stop condition is met. For a large nuclear polarization code, a permutation factor graph can improve the decoding performance, and a pruning factor graph can reduce the decoding complexity. A simulation result shows that compared with a BP decoding algorithm, the algorithm provided by the invention can ensure that the complexity is not too high and the decoding performance is improved at the same time.

The invention discloses a communication method and a communication device based on a polarization code, and the method comprises the steps: when a coding side carries out the coding of a current first to-be-coded bit block, determining a frozen bit adopted by the current coding encryption based on a second information bit or a second frozen bit associated with a second coding bit block transmitted last time, the coding and encryption integrated secure communication is realized, the randomness of the frozen bits is improved, the frozen bits are not easy to obtain by an eavesdropper, the leakage of the frozen bits is avoided, and the security of coding and encryption is improved.

Embodiments of this application provide a communication method and apparatus, to reduce complexity of a polar code construction process. The method includes: obtaining a to-be-encoded bit sequence, where the to-be-encoded bit sequence includes K information bits, and K is an integer greater than 0; determining a first sequence, where positions of the K information bits in the first sequence are determined based on a second sequence corresponding to a target code rate and a value of K, the second sequence is used to represent selection priorities of N0 bit positions, and N0 is an integer greater than K; performing polar code encoding on the first sequence to obtain a third sequence; and sending the third sequence. The second sequence is designed for a constant code rate, and a same sequence may be used to construct a series of polar codes having a same code rate and different lengths.

The invention relates to a power equipment multi-modal data real-time acquisition and monitoring system based on a star flash ad hoc network, and belongs to the technical field of power Internet of Things. Aiming at the problems of high communication delay, large multi-source data fusion error and poor complex environment adaptability in power equipment monitoring, the method comprises the following steps: 1) constructing a star-flash dynamic ad hoc network, and modulating by adopting FHSS frequency hopping and QPSK-polarization code (error rate lt; 10-6) the anti-interference performance is improved; 2) designing a multi-modal data space-time alignment algorithm (IEEE 1588v2 + DTW interpolation) and a dynamic weight fusion strategy (normal / fault working condition weight 0.6-0.2); and 3) three-dimensional visualization and edge AI fault positioning are realized based on digital twinning, and the accuracy rate is 98.5%. The system reduces the operation and maintenance cost by 67%, and is suitable for high-precision monitoring scenes such as a transformer substation.

A device is configured for encoding an input sequence comprising message bits into a codeword using a polar code. The device is configured to sequentially encode each of a plurality of blocks of the input sequence by applying a sliding window to the input sequence, wherein each block of the input sequence is encoded based on an XOR operation of the block and a previous block of the input sequence to obtain a codeword block of the codeword, and sequentially output each obtained codeword block of the codeword.

Methods, systems, and devices for wireless communications are described. In some examples, a transmitting device, such as a user equipment (UE) or a network entity, may encode an information bit vector into multiple code blocks using a polar code partitioned into multiple sub-blocks having a same block length in accordance with a polar transformation associated with a modulation scheme. In some examples, each code block of the multiple code blocks may be encoded using a respective sub-block of the multiple sub-blocks. Additionally, the transmitting device may interleave respective bits of each code block of the multiple code blocks using a respective interleaver of multiple interleavers. As such, the transmitting device may transmit the respective interleaved bits of each code block of the multiple code blocks over a respective bit channel of multiple bit channels, where each bit channel of the multiple bit channels is associated with a respective reliability.

A method includes receiving a bit string at a processor, performing an error correction, and causing transmission of a modulated signal. The error correction includes identifying a set of binary strings based on the bit string, mapping each binary string from the set of binary strings to a first abelian group element from a set of first abelian group elements, and applying a generalization of polar codes to the set of first abelian group elements to produce a set of second abelian group elements. The error correction also includes mapping each of the second abelian group elements to an in-phase / quadrature (I / Q) point from a set of I / Q points and identifying real-valued points based on the set of I / Q points, each of the real-valued points representing an I / Q point from the set of I / Q points. The modulated signal has a modulation that is based on the real-valued points.

Methods, systems, and devices for wireless communications are described. Systematic polar codes may be used for the transmission of information bits to a wireless communications device, such as for extended reality (XR) applications, online video application, or other applications. In such cases, information bits of a data stream may be sorted based on priority or importance. Additionally, in accordance with the use of systematic polar coding, bit-channels may be sorted by protection level, and the sorted bits may be mapped to the most highly protected bit-channels (e.g., based on the importance of the bits). The mapped bits may be encoded using a systematic polar encoder to generate a codeword, and the codeword may be transmitted to another wireless communications device.

The application provides a polar code soft input soft output decoding method, a decoding device and a communication device; the decoding method comprises the following steps: (S1) performing fast serial cancellation list decoding under dynamic frozen bit constraint for all special nodes constituting a polar code; the types of the special nodes comprise rate zero, rate one, repetition and single parity check; (S2) calculating the approximation of the sum of the posterior probabilities of the legal code words not accessed under each special node after decoding; (S3) using the approximation of the code book probability obtained in the step (S2) to calculate the bit level soft information of the output polar code. The low-latency polar code soft input soft output decoding method provided by the application improves the parallelism by realizing fast soft output decoding based on the Rate0, Rate1, REP and SPC nodes, and significantly reduces the decoding latency without losing the soft output precision compared with the SO-SCL decoding algorithm.

The invention discloses a code rate self-adaption method and system based on a Polar code, and relates to the technical field of communication. The code rate self-adaption system based on the Polar code comprises a channel state data acquisition module, a code rate self-adaption module and a code rate self-adaption module, the channel monitoring module is used for acquiring and comprehensively analyzing channel state data in real time and analyzing a channel state set, the channel evaluation module is used for analyzing a channel comprehensive quality evaluation index based on the channel state set, and the code rate control module is used for adjusting a coding rate based on the channel comprehensive quality evaluation index. The channel quality can be accurately evaluated and the coding rate can be dynamically adjusted according to the comprehensive quality evaluation index of the channel, such as the signal-to-noise ratio, the bit error rate, the transmission distance, the environmental data and the receiving state of the receiving end, and the flexible self-adaptive adjustment mechanism enables the system to automatically optimize the transmission scheme according to the real-time wireless channel change, so that the transmission efficiency is improved. And the problem of possible low efficiency of a traditional static system in different environments is avoided.

Length-adapter input parameters for length-adaptive encoding include a data word length and a length-adapted codeword length, which are positive integers. Length-adapter output parameters include a primary data word length, a secondary data word length, a primary codeword length, and a secondary codeword length. A received data word is split according to splitter parameters into a primary data word based on the primary data word length and a secondary data word based on the secondary data word length. The primary data word is encoded in accordance with primary encoder parameters to generate a primary codeword from a primary code. The secondary data word is encoded in accordance with secondary encoder parameters to generate a secondary codeword from a secondary code. The primary and secondary codewords are combined in accordance with combiner parameters to generate a length-adapted codeword transmitted via a channel to a decoder.

The present invention discloses a UAV swarm control method based on polarization code, which includes the following steps: a polarization code encoder encodes task data for transmission; the coded signal is transmitted to an adjacent UAV or control station through a wireless channel, and during the coded signal transmission process, a channel estimation and feedback mechanism is used to dynamically adjust the frequency and time slot allocation according to the quality of the channel; the UAV receives the coded signal from other UAVs or control stations and uses a built-in decoder to decode the signal; the error correction mechanism of the polarization code is used to improve the signal recovery quality. The present invention has the following advantages and effects: using the channel estimation and feedback strategy to dynamically adjust the frequency and time slot allocation, and combining the error correction mechanism of the polarization code, not only improves the accuracy of data transmission, but also solves the interference and conflict problems in swarm communication, and provides strong support for the efficient collaborative work of UAV swarms.

The invention relates to a wireless keyboard pairing switching method and device based on a polar code, and the method comprises the steps: carrying out the channel estimation of each device connected with a wireless keyboard, and obtaining the channel gain of each device; based on the channel gain of each device, performing power distribution on each device in a preset power spectrum pair through non-orthogonal multiple access; coding the sending signal of each device through a polar code, and carrying out joint decoding on the received signals of the plurality of devices; in response to an equipment switching request of a user, separating equipment before and after switching through a constellation rotating method; the beam of each device is optimized based on the real-time channel estimation information. According to the method, dynamic channel distribution, polarization code and rotating constellation technologies are combined, interference and time delay of the wireless keyboard in switching are reduced, and reliability is improved.

Methods, systems, and devices for wireless communications are described. In some examples, a transmitting device, such as a user equipment (UE) or a network entity, may encode an information bit vector into multiple code blocks using a polar code partitioned into multiple sub-blocks having a same block length in accordance with a polar transformation associated with a modulation scheme. In some examples, each code block of the multiple code blocks may be encoded using a respective sub-block of the multiple sub-blocks. Additionally, the transmitting device may interleave respective bits of each code block of the multiple code blocks using a respective interleaver of multiple interleavers. As such, the transmitting device may transmit the respective interleaved bits of each code block of the multiple code blocks over a respective bit channel of multiple bit channels, where each bit channel of the multiple bit channels is associated with a respective reliability.

A 5th generation (5G) or 6th generation (6G) communication system for supporting a higher data rate than a beyond 4th generation (4G) communication system, such as long-term evolution (LTE) is provided. An electronic device performs interleaving on codeword bits, according to a polar code sequence corresponding to the codeword bits, allocates the interleaved codeword bits respectively to blocks, and transmits at least one symbol generated as a result of performing modulation on the interleaved codeword bits for each block, based on the allocation, on at least one resource block corresponding to each of the blocks.

The invention discloses a star flash-Polar code enhanced AR / VR panoramic video stream transmission method, and relates to the technical field of video stream transmission. According to the star flash-Polar code enhanced AR / VR panoramic video stream transmission method, panoramic video data are acquired, a gaze thermodynamic diagram is analyzed, an image is divided into a plurality of blocks, a spatial gaze priority index of each block is extracted, a differentiated Polar coding rate is allocated based on the indexes, and a star flash protocol frequency band resource state is combined, so that an AR / VR panoramic video stream is transmitted. According to the method, the dynamic division and key block identification of the panoramic image are realized by constructing the gaze thermodynamic diagram and extracting the spatial gaze priority index, and the definition and detail retention of the gaze area image are enhanced in combination with differential Polar coding rate allocation, so that the multi-link efficient transmission is realized. And the immersion and interaction experience in an AR / VR scene are improved, and the method is suitable for high-immersion panoramic application.

The invention belongs to the field of star flash keyboard communication, and discloses a star flash keyboard anti-multi-source interference communication method and device fusing Polar codes and SLB, and the method comprises the steps: firstly monitoring space, frequency domain and time domain interference features in real time through a multi-dimensional interference sensing system; then, the SLB intelligent engine classifies interference types based on machine learning and dynamically matches an optimal anti-interference strategy; then the adaptive execution module cooperatively adjusts a Polar coding scheme (R = 1 / 4-3 / 4), antenna beam pointing and channel selection; and finally, optimizing system parameters through a continuous learning mechanism. The anti-interference capability is outstanding, the response performance is excellent, the energy efficiency ratio is excellent, the communication reliability problem of the star flash keyboard in a high-density interference environment is effectively solved, and a stable and reliable wireless input solution is provided for harsh scenes such as electronic sports and industry.

The invention discloses an image transmission method and system based on a Polar code, and relates to the technical field of image transmission. According to the image transmission system based on the Polar code, an image acquisition module acquires image data, a data conversion module performs format conversion, a Polar code encoding module combines channel data to perform dynamic encoding and generate an encoding bit stream data packet, and a wireless transmission module transmits the encoding bit stream data packet to a Polar code decoding module through the wireless transmission module. According to the invention, the image reconstruction module is used for carrying out quality evaluation analysis on the transmitted image data to obtain the quality evaluation index of the transmitted image and carrying out image reconstruction based on the quality evaluation index of the image, so that the transmission reliability of the image data in wireless communication is effectively improved; and therefore, the integrity and transmission quality of the image data can be ensured in an environment with more noise or stronger interference.

The invention discloses a polar code coding method and device, relates to the technical field of communication, and can enable a nested PC-Polar code to multiplex a sub-block interleaving rate matching mode of an NR PC-Polar code and improve NR compatibility. The method comprises the following steps: mapping an information bit sequence with the length of k to k bits of a first sequence with the length of N according to a reliability sequence with the length of N to obtain a second sequence; wherein the second sequence comprises k information bits, x parity check PC bits and N-k-x frozen bits, and k, N and x are all positive integers; m information bits in the k information bits are the first m bits ranked according to the reliability from high to low in the second sequence, and the remaining (k-m) information bits in the k information bits are the bits corresponding to the first (k-m) information bits ranked according to the reliability from high to low in the preset information bit set in the second sequence; the x PC bits are x PC bits in a preset PC bit set; and performing polarization coding on the second sequence to obtain a third sequence.