23 results about "Symbol mapping" patented technology

The application provides a GMSK underwater acoustic communication method and system based on frequency domain equalization, and the method comprises the following steps: adding a cyclic prefix before a transmission signal sequence, adding a tail symbol after the transmission signal sequence, carrying out conversion and information-symbol mapping, modulating according to a GMSK signal modulation mode based on Laurent decomposition, obtaining a GMSK complex baseband signal, modulating the GMSK complex baseband signal to a carrier as a final transmission signal, and transmitting the final transmission signal to an underwater acoustic channel; receiving the transmission signal in the underwater acoustic channel, carrying out band-pass filtering, time-frequency two-dimensional synchronization, matched filtering, frequency domain equalization and iterative symbol detection on the received signal, obtaining a judged symbol, and completing the GMSK underwater acoustic communication based on the frequency domain equalization. The application has the advantages that the complexity of the symbol detection of the conventional frequency domain equalizer is reduced, and the communication performance is improved.

A coding / decoding method and apparatus are disclosed, relating to the multimedia field. The method includes: dividing an 11B7T sequence into four groups, namely 3B2T, 3B2T, 3B2T, and 2B1T; using a 2-bit data pattern, setting feature combinations in specific regions of the 7 symbols mapped to the 11 bits; using these feature combinations as identifiers to indicate the encoding method; and at the decoding end, mapping the 7 symbols to 11 bits according to the encoding method indicated by the feature combinations of the specific regions. This divides a long sequence into multiple short sequences, performs PAM3 coding / decoding on these short sequences, and combines the feature combinations of the specific regions to indicate the encoding method, reducing the complexity of long-sequence PAM3 coding / decoding, thereby reducing the circuit implementation complexity of long-sequence PAM3 coding / decoding and improving PAM3 coding / decoding performance.

Methods for frequency division multiple access in ambient internet of things (AIoT) systems are provided. A method includes mapping first and second groups of baseband symbols to a first one and a second one of a plurality of frequency subbands. The method includes processing the first and second groups of baseband symbols to generate a first signal, transmitting the first signal in first time resources, and determining that a first one or more devices are capable of receiving a transmission using one of the frequency subbands and a second one or more devices are not capable of receiving a transmission using one of the frequency subbands. The method includes transmitting data for the first one or more devices in different frequency subbands; and transmitting data for one of the second one or more devices in a single one of the frequency subbands.

Methods, systems, and devices for wireless communications are described. Techniques described herein support encoding and transmitting of data carrying reference signals (DCRSs according to a lower modulation order and data according to a higher modulation order. A transmitting device may write data bits and DCRS bits into a bitstream according to an interleaving table (e.g., a systematic bit priority mapping (SBPM) interleaver or table). In some examples, the transmitting device may utilize a sub-constellation of the higher modulation order constellation for transmitting the DCRS bits via DCRS REs. In some examples, the transmitting device may skip (e.g., leave unoccupied) entries in the interleaving table corresponding to the LSBs of a DCRS column. In some examples, the transmitting device may write DCRS bits into the bitstream according to a first interleaving table, and may write data bits into the bitstream according to a second interleaving table.

Embodiments of the present application disclose a data processing method, device and system. The method comprises: performing data processing on two acquired third data streams to obtain two fourth data streams, wherein consecutive bit blocks A0, A1, A2, A3, A4, A5, A6 and A7 in one third data stream and consecutive bit blocks B0, B1, B2, B3, B4, B5, B6 and B7 in the other third data stream constitute consecutive bit blocks A0, B0, A1, B1, A2, B2, A3, B3 in one fourth data stream and consecutive bit blocks A4, B4, A5, B5, A6, B6, A7 and B7 in the other fourth data stream, and each bit block comprises eight bits; and then performing double-polarization 16QAM symbol mapping and framing processing on the two fourth data streams respectively, so that the FEC decoding performance is improved and hardware implementation is facilitated.

Embodiments of the present application disclose a data processing method, device and system, which are simple in hardware implementation, low in power consumption and good in compatibility with various coherent transmission scenarios. First, d in bits are added to first data including d CP bits to obtain second data including d scr bits, d in and d CP are integers greater than or equal to 1, and d scr =d in +d CP . Then, the second data is processed by encoding, dual-polarization symbol mapping and framing to obtain at least one superframe. The first data is represented by r rows and q=2056 bits per row, and q=2056 is compared with the existing scheme of 10280 bits per row, which can better realize the future probabilistic constellation shaping (PCS) and better compatible with the 1.6T ZR+ data processing method using PCS in the future. Moreover, the number of dual-polarization symbols in the at least one superframe is an integer multiple of 172032, which can be compatible with the 1.6T ZR+ data processing method using multi-subcarrier or multi-path optical signal transmission in the future.

The application relates to the technical field of intelligent traffic, in particular to a flight path monitoring and collision avoidance task display system. The system comprises a flight path generation module, a relationship discrimination module, a risk grading module, an instruction formation module and a flight display output module. The flight path generation module receives signals and generates a flight path evolution path according to node deduction; the relationship discrimination module receives a path comparison degree and a direction to generate a relationship description; the risk grading module receives the description and performs joint comparison and mapping to generate a grade sequence; the instruction formation module combines consistency verification to generate a collision avoidance instruction sequence; and the flight display output module receives the instruction sequence, performs symbol mapping marking to generate a display scheme. In the application, the path is deduced by combining an update rhythm to eliminate refresh lag, the closeness degree, the direction and the height are compared to complete multi-dimensional state description and break the single judgment limitation, the joint comparison and grading mapping are combined with coherent verification to construct instructions and provide accurate prevention guidance, and the execution symbol mapping marking is arranged to form a structure, which improves the shallow superposition malpractice, reduces the monitoring load and improves the scheduling efficiency.

This invention discloses a communication method, system, storage medium, and device based on a solar-blind ultraviolet detector. The method includes: constructing a fixed-duration frame structure containing a synchronization segment, a control segment, a data segment, and a protection segment, and formulating a unified communication protocol; the transmitting end converts the input digital signal into a binary bit stream and frames it, determines the number of bits carried by a single symbol based on the APPM modulation order and amplitude level, and transmits an ultraviolet light signal through bit grouping, symbol mapping, Gaussian pulse shaping, digital modulation, and electro-optic conversion; the receiving end converts the ultraviolet light signal into an electrical signal, extracts pulse feature parameters after filtering, adaptive shape Gaussian matched filtering, and timing synchronization, demodulates to obtain a bit stream, and performs frame parsing to extract valid user data; frame synchronization and bit synchronization are achieved throughout the process through a synchronization control module to ensure timing matching between the transmitting and receiving ends. This invention enhances the system's adaptability to channel time-varying characteristics and environmental interference, and improves communication confidentiality and reliability.

Methods for frequency division multiple access in ambient internet of things (AIoT) systems are provided. A method includes mapping first and second groups of baseband symbols to a first one and a second one of a plurality of frequency subbands. The method includes processing the first and second groups of baseband symbols to generate a frequency division multiple access (FDMA) signal including a first signal and a second signal, transmitting the FDMA signal, and determining a first one or more devices are capable of receiving the first signal or the second signal and a second one or more devices are not capable of receiving the first signal or the second signal. The method includes transmitting data for the first one or more devices in respective ones of the frequency subbands; and transmitting data for one of the second one or more devices in a single one of the frequency subbands.

Methods, systems, and devices for wireless communications are described. Techniques described herein support encoding and transmitting of data carrying reference signals (DCRSs according to a lower modulation order and data according to a higher modulation order. A transmitting device may write data bits and DCRS bits into a bitstream according to an interleaving table (e.g., a systematic bit priority mapping (SBPM) interleaver or table). In some examples, the transmitting device may utilize a sub-constellation of the higher modulation order constellation for transmitting the DCRS bits via DCRS REs. In some examples, the transmitting device may skip (e.g., leave unoccupied) entries in the interleaving table corresponding to the LSBs of a DCRS column. In some examples, the transmitting device may write DCRS bits into the bitstream according to a first interleaving table, and may write data bits into the bitstream according to a second interleaving table.

The application discloses a low-code platform form migration method and device, equipment and storage medium, and relates to the technical field of low-code platforms. The method comprises the following steps: obtaining a configuration field of a form model to be migrated; the configuration field is a configuration field after a target field is annotated in advance according to an annotation rule; when file export is performed, a to-be-processed symbol is determined from the configuration field according to the annotation, the to-be-processed symbol is replaced with an occupant capable of representing a path position, then a symbol mapping table is created based on the to-be-processed symbol and the occupant, and a configuration file is exported; when file import is performed, a new symbol corresponding to the to-be-processed symbol is generated according to the annotation corresponding to the to-be-processed symbol, and the new symbol is used to replace the occupant corresponding to the to-be-processed symbol in the configuration file according to the mapping table until all the occupants in the configuration file are replaced. The method realizes the rapid migration of forms in a low-code platform.

Disclosed are an encoding / decoding method and device, relating to the field of multimedia. The method comprise: dividing 11B7T into three groups, i.e., 5B3T, 3B2T, and 3B2T; using a data pattern of 5 bits to set a feature combination in a specific bit field among 7 symbols to which 11 bits are mapped; using the feature combination of the specific bit field as an identifier to indicate an encoding mode; and at a decoding end, mapping 7 symbols into 11 bits on the basis of the encoding mode indicated by the feature combination of the specific bit field. Thus, a long sequence is divided into a plurality of short sequences, PAM3 encoding / decoding is performed on the plurality of short sequences, and an encoding mode is indicated on the basis of a feature combination of a specific bit field, reducing the complexity of PAM3 encoding / decoding for the long sequence, thereby reducing the circuit implementation complexity of PAM3 encoding / decoding of the long sequence and improving the PAM3 encoding / decoding performance.

Methods, systems, and devices for wireless communications are described. In some systems, a network entity may map on-off keying (OOK) symbols of an OOK sequence to an orthogonal frequency division multiplexing (OFDM) waveform including at least one OFDM symbol with a cyclic prefix. Each OOK symbol of the OOK sequence may be mapped to at least one segment of an integer quantity of segments of the OFDM waveform based on an OOK data rate. A duration of each segment of the integer quantity of segments of the OFDM waveform may be based on the OOK data rate and a ratio between a duration of the cyclic prefix and a duration of a remainder of the OFDM symbol. The network entity may transmit the OFDM waveform via a set of frequency resources. A user equipment (UE) may receive and decode the OFDM waveform to obtain the OOK sequence.

This invention belongs to the field of wireless communication technology, specifically relating to a resource allocation method for a network where high-speed mobile terminals and low-speed users coexist. The method includes: constructing a NOMA system model based on S-OTFS; clustering and pairing high-speed and low-speed mobile users (H-UEs) and low-speed users (L-UEs); generating sparse patterns and mapping H-UE symbols to the DD domain, then performing ISFFT processing to generate sparse OTFS signals; mapping L-UE symbols to the TF domain and performing SC-FDMA modulation to generate SC-FDMA signals; a NOMA signal composed of the two signals from the base station; both types of users receiving the NOMA signal and calculating the spectral efficiency of each user; constructing an optimization problem to maximize the average spectral efficiency of H-UEs based on the user's spectral efficiency; solving the optimization problem to obtain a resource allocation scheme; and the system transmitting signals according to the resource allocation scheme. This invention significantly improves the communication system, rate, and spectral efficiency in heterogeneous mobility scenarios.

This invention discloses a method for detecting damage points in the outer insulation layer of buried steel pipelines and identifying target pipelines based on signal modulation. The method includes: a signal transmission step, where a low-frequency digital signal is used to phase-modulate a high-frequency carrier wave to generate a modulated signal, which is then applied to the target pipeline; a signal reception step, where a response signal is received from the target pipeline or its surrounding environment; and a signal processing and judgment step, where the instantaneous phase information is extracted by coherent demodulation of the response signal, and this information is compared with a phase-symbol mapping relationship preset at the transmitting end to determine the logical direction of the current, thereby locating the damage point in the outer insulation layer and identifying the target pipeline. This invention effectively resists power frequency interference, reduces power consumption, and improves detection accuracy.

The application discloses a kind of based on player behavior log's syntax tree structure automatic marking and behavior mode mining method and system.The method is washed to player behavior log, conversation segmentation and terminal symbol mapping, based on behavior grammar constructs compressed analysis forest and establishes shared subtree index;Convergent state is retrieved to warm start inference by constructing residual fingerprint history;On analysis forest, adopt alternating direction multiplier method to carry out production consistency, stage monotonicity and resource boundary multiple constraint inference, output node label posteriori and residual tensor aligned according to node-production-constraint type;Stable syntax tree is normalized and encoded and frequent subtree mining, generate behavior mode library and failure positioning mapping with certificate.The scheme improves the consistency and interpretability of marking, reduces the cost of manual and iteration, and improves the controllability of mode online trigger.

This invention discloses a communication method, system, storage medium, and device based on a solar-blind ultraviolet detector. The method includes: constructing a fixed-duration frame structure containing a synchronization segment, a control segment, a data segment, and a protection segment, and formulating a unified communication protocol; the transmitting end converts the input digital signal into a binary bit stream and frames it, determines the number of bits carried by a single symbol based on the APPM modulation order and amplitude level, and transmits an ultraviolet light signal through bit grouping, symbol mapping, Gaussian pulse shaping, digital modulation, and electro-optic conversion; the receiving end converts the ultraviolet light signal into an electrical signal, extracts pulse feature parameters after filtering, adaptive shape Gaussian matched filtering, and timing synchronization, demodulates to obtain a bit stream, and performs frame parsing to extract valid user data; frame synchronization and bit synchronization are achieved throughout the process through a synchronization control module to ensure timing matching between the transmitting and receiving ends. This invention enhances the system's adaptability to channel time-varying characteristics and environmental interference, and improves communication confidentiality and reliability.

The application discloses a kind of detection method and system for efficiently realizing polarization recovery, the method comprises: the symbol mapping of sending data is carried out, and is carried out series-parallel conversion, obtains the first branch data of multiple parallel branches;Using offset selection algorithm, the first branch data of multiple parallel branches is handled, and pseudo training sequence is obtained;The series-parallel conversion of pseudo training sequence is carried out, and the second branch data of multiple parallel branches is obtained;The second branch data of multiple parallel branches is handled, and training data is obtained;Using stokes vector method, polarization compensation is solved according to training data, and polarization recovery is realized.The system comprises: sending data conversion module, sending data processing module, receiving data conversion module, receiving data processing module and polarization recovery module.Implementation of the method, can be directly according to the transmission signal of transceiver construction training data, without special training data, in the case of transmission effective data, improve the spectral efficiency of transmission.

Methods, systems, and devices for wireless communications are described. Techniques described herein support encoding and transmitting of data carrying reference signals (DCRSs according to a lower modulation order and data according to a higher modulation order. A transmitting device may write data bits and DCRS bits into a bitstream according to an interleaving table (e.g., a systematic bit priority mapping (SBPM) interleaver or table). In some examples, the transmitting device may utilize a sub-constellation of the higher modulation order constellation for transmitting the DCRS bits via DCRS REs. In some examples, the transmitting device may skip (e.g., leave unoccupied) entries in the interleaving table corresponding to the LSBs of a DCRS column. In some examples, the transmitting device may write DCRS bits into the bitstream according to a first interleaving table, and may write data bits into the bitstream according to a second interleaving table.

Disclosed are an encoding / decoding method and apparatus, relating to the field of multimedia. The method comprises: dividing 11B7T into four groups, i.e., 3B2T, 3B2T, 3B2T and 2B1T; using data patterns of 2 bits to set a feature combination in specific bit fields of 7 symbols to which 11 bits are mapped, and using the feature combination in the specific bit fields as an identifier to indicate an encoding mode; and at a decoding end, mapping 7 symbols to 11 bits on the basis of the encoding mode indicated by the feature combination in the specific bit fields. Therefore, a long sequence is divided into a plurality of short sequences, PAM3 encoding / decoding is performed on the plurality of short sequences, and an encoding mode is indicated on the basis of a feature combination in specific bit fields, reducing the complexity of PAM3 encoding / decoding of the long sequence, thereby reducing the implementation complexity of circuits for PAM3 encoding / decoding of the long sequence and improving the performance of PAM3 encoding / decoding.

The application discloses a short code polar code encoding construction method based on polarization spectrum. In view of the problems of existing polar code construction in short packet non-coherent SIMO communication, such as dependence on channel state information and limitation of modulation order, a double-core mixed polar code encoding architecture is established, the Kronecker product of two-dimensional cores and arbitrary order cores is adopted, and high-order modulation of an arbitrary symbol mapping bit number is supported; an ordered weight sequence set is generated by calculating the minimum chord distance vector of a constellation diagram; a polarization spectrum statistic is proposed to describe the distribution of segmented weights after the ordering of code words in each sub-code auxiliary set under the condition of no channel state information; an optimization target is established based on the polarization spectrum, the chord distance and the number of receiving antennas, and the optimal information bit allocation is solved by using dynamic programming. Under the symbol level non-coherent SCL decoding, compared with the 5G NR polar code construction scheme and the coherent transmission scheme, the application significantly improves the block error rate performance and is suitable for short packet communication scenes with high mobility and low pilot overhead.

A coding / decoding method and apparatus are disclosed, relating to the multimedia field. The method includes: dividing an 11B7T sequence into three groups, namely 5B3T, 3B2T, and 3B2T; using a 5-bit data pattern, setting feature combinations in specific regions of the 7 symbols mapped to the 11 bits; using these feature combinations as identifiers to indicate the encoding method; and at the decoding end, mapping the 7 symbols to 11 bits according to the encoding method indicated by the feature combinations of the specific regions. This divides a long sequence into multiple short sequences, performs PAM3 coding / decoding on these short sequences, and combines the feature combinations of the specific regions to indicate the encoding method, reducing the complexity of long-sequence PAM3 coding / decoding, thereby reducing the circuit implementation complexity of long-sequence PAM3 coding / decoding and improving PAM3 coding / decoding performance.

This invention relates to an easily extensible method for representing marine geographic information in a graphical format, belonging to the field of geographic information systems (GIS) technology. Addressing the problem that existing S-100 nautical charts rely on dedicated scripts and are difficult to render directly on general-purpose geographic information platforms, this invention proposes a decoupled architecture: first, the S-100 symbolic semantics are encapsulated into a structured GeoJSON intermediate representation; second, a dynamic symbol mapping adapter maps it to native symbol identifiers of the general platform; and simultaneously supports custom extensions of the feature catalog, map catalog, and rule files. This invention achieves accurate and compliant display of professional nautical charts without modifying the platform's underlying code, while also possessing data security and cross-platform scalability.