85 results about "Symbol mapping" patented technology

The invention provides an M-system chaos shift keying communication method, device, equipment and medium, and the method comprises the steps: generating a long chaos sequence and a short chaos sequence through employing two chaos generators with different chaos mapping, mapping an M-system symbol into an embedded position through employing a symbol-to-position mapping table, and carrying out the mapping of the M-system symbol into the embedded position; a short chaotic sequence is embedded into a corresponding position of a long chaotic sequence to generate a combined chaotic transmitting signal, so that M-system transmission can be realized only through two chaotic generators, and M chaotic mapping is not needed to construct a signal space; and a receiving end adopts a deep neural network demodulation model to carry out probability judgment on the segmented subsequences, so that incoherent demodulation is realized, the traditional chaotic synchronization technology and orthogonalization technology are not needed, the system structure is effectively simplified, and the realization difficulty is reduced.

The invention discloses a PDF engineering drawing cross-end synchronization method and system based on operation instruction serialization and a storage medium, and belongs to the technical field of cross-end engineering drawing cooperative process.The method comprises the steps that operation instructions of multiple ends on a PDF engineering drawing are captured, and operation types, target object IDs and parameters are extracted to serve as semantic metadata; constructing a dependency graph of the operation instruction based on the target object ID, and identifying a key path instruction; encoding an operation instruction and a dependency relationship into a serialized format, and only transmitting an instruction of a changed part; the receiving end analyzes the serialized instruction, detects conflicts based on semantic metadata, and executes the instruction according to the dependency relationship; and dynamically adapting the rendering result according to the equipment parameters, including coordinate system conversion and symbol mapping. Therefore, the problems of synchronization efficiency and accuracy in the prior art are solved, and the effects of multi-terminal real-time, efficient and synchronous consistency of the engineering drawing are achieved.

Systems and methods are described for generating and implementing return-link satellite communications using a novel 1+N-ary constellation. The 1+N-ary constellation arranges M (e.g., 8) constellation points in a novel formation that increases their distances from each other relative to conventional M-ary modulation schemes by locating an inner constellation point centrally with respect to an I-Q plane and distributing the remaining N (i.e., M=N+1) outer constellation points radially around the inner constellation point. 1+N amplitude and phase-shift keying (APSK) modulation can be used to map symbols to the constellation. Embodiments combine the 1+N APSK modulation with additional features, such as non-Nyquist partial response (NNPR) filtering and / or state of the art low-density parity check (LDPC) coding.

The invention discloses a four-dimensional multi-component phase modulation transmission and receiving method based on information source entropy driving symbol extraction in the technical field of high-dimensional phase modulation, and the method comprises the steps: obtaining the information source entropy of a target information source, calculating the number of information source symbols, and generating a simplified four-dimensional symbol unit; determining a bit index of each symbol to construct a mapping table; selecting the number of constellations, and distributing a corresponding Huffman code for each constellation point; performing interleaving processing on the bit sequence after Huffman coding by combining a bit interleaver, converting the bit sequence into a corresponding decimal numerical value, and performing bit-to-symbol mapping by matching a corresponding bit index through a mapping table to obtain a mapped symbol sequence; and modulating the mapped symbol sequence to a target wave band for transmission. According to the method, the spectrum efficiency and the transmission rate of a wireless communication system are remarkably improved, the symbol mapping efficiency is improved, the anti-interference capability of the system is effectively enhanced, the stability of data transmission is improved, and the error rate is also remarkably reduced.

Embodiments herein provide sounding reference signals (SRS) enhancements to support flexible mapping of multiple SRS ports to multiple symbols. In some embodiments, a network node may send, to a user equipment (UE), a sounding reference signal (SRS) configuration that maps multiple SRS ports across multiple symbols using a time domain orthogonal cover code (TD-OCC) codebook. The UE may transmit a SRS from each SRS port using the multiple symbols. The network node may provide feedback based on the SRS from each SRS port.

The invention relates to a method for generating an overall Pamp based on a three-dimensional model. The invention discloses an ID graph system and method, and the system comprises a processor which comprises an extraction module, a symbol mapping module, a relation construction module and a layout module. The extraction module is used for analyzing a designated area of the three-dimensional model and extracting a three-dimensional symbol type and a topological relation of the three-dimensional model; the symbol mapping module is used for establishing a mapping relation table of the three-dimensional symbol types and the two-dimensional symbol types based on the three-dimensional symbol types and a mapping rule so as to retrieve the two-dimensional symbol types based on the three-dimensional symbol types; the relation building module is used for building a logic diagram data table based on the topological relation so as to store the connection relation and the sequence relation; the layout module is used for carrying out two-dimensional symbol layout based on the two-dimensional symbol type and the three-dimensional symbol type to form a complete Pamp; and an ID graph. According to the invention, the traditional Pamp is abandoned; according to the thought of generating the complete flow chart on the ID, the efficiency is improved by intelligently extracting the information topological relation of the model and combining the user-defined symbol mapping rule.

The embodiment of the invention discloses a data processing method, which can be applied to a cascade FEC (Forward Error Correction) scheme in a 1.6 T high-speed transmission scene, and the scheme comprises the following steps: p: q symbol demultiplexing, alignment identifier locking and de-skewing are carried out on p first data streams subjected to Reed-Solomon RS (Reed-Solomon Reed-Solomon) coding to obtain q second data streams, p is an integer greater than or equal to 1, q is an integer greater than or equal to 1, and q is an integer greater than or equal to 1; q is equal to 2 * p; and performing data processing including inner code coding and dual-polarization symbol mapping on the q second data streams to obtain one dual-polarization data stream. According to the scheme, a four-symbol boundary is provided before the inner code is coded, so that the error correction performance of a cascade FEC scheme can be improved.

A user equipment (UE) configured for operation in a New Radio (NR) network includes processing circuitry to apply modulation and coding parameters to respective portions of a PUSCH transmission mapped to a plurality of non- contiguous frequency-domain resource sets within a carrier bandwidth, based on network signaling. The processing circuitry determines a transport block size as a combination of contributions from the respective portions, based on their associated parameters. The processing circuitry performs coding and modulation separately for each portion mapped to a different frequency-domain resource set. The processing circuitry maps encoded bits and modulated symbols to the respective frequency-domain resource sets according to a spatial- frequency-time-ordered mapping. The apparatus includes memory coupled to the processing circuitry and configured to store the modulation and coding parameters.

Systems and methods are described for generating and implementing return-link satellite communications using a novel 1+N-ary constellation. The 1+N-ary constellation arranges M (e.g., 8) constellation points in a novel formation that increases their distances from each other relative to conventional M-ary modulation schemes by locating an inner constellation point centrally with respect to an I-Q plane and distributing the remaining N (i.e., M=N+1) outer constellation points radially around the inner constellation point. 1+N amplitude and phase-shift keying (APSK) modulation can be used to map symbols to the constellation. Embodiments combine the 1+N APSK modulation with additional features, such as non-Nyquist partial response (NNPR) filtering and / or state of the art low-density parity check (LDPC) coding.

The application relates to a satellite communication transmission method and device. The method of the application is applied to a sending end and comprises the following steps: encoding source data, and framing the coded output data based on an agreed subframe structure; performing symbol mapping processing on the framed output subframes to generate a first baseband signal; performing pulse shaping processing to obtain a second baseband signal; performing up-conversion and digital-to-analog conversion processing on the baseband signal to obtain an analog signal meeting the emission frequency point requirement and the sampling rate requirement, and performing emission; the subframe structure comprises a frame header synchronization sequence, a characteristic sequence used for carrying modulation mode information and coding mode information, a data load sequence and a frame tail synchronization sequence; the frame header synchronization sequence, the characteristic sequence, the data load sequence and the frame tail synchronization sequence are arranged in sequence, and the end of each sequence is sequentially inserted with a symbol pilot, and each symbol pilot constitutes a unique word sequence used for realizing a preset function. The application is beneficial to improving communication stability.

A communication method and apparatus for simultaneous information and power transfer, and a storage medium. The method comprises: mapping n1 power transfer modulation symbols and n2 data modulation symbols to different resource elements of a first resource block, wherein the power transfer modulation symbols are obtained on the basis of time-domain constant envelope modulation, such that time-domain modulation symbols of a power transfer signal have the characteristic of a constant amplitude; and then, a first communication apparatus sending the n1 power transfer modulation symbols and the n2 data modulation symbols by means of the first resource block. The effect of reducing the PAPR of a wireless signal during simultaneous information and power transfer is achieved.

A multi-task-oriented semantic communication method, device, equipment and storage medium, the method is based on the semantic communication basic framework of mutual information maximization, the source information is processed by semantic information representation, information coding and information transformation in the semantic communication sending end; the received semantic information is processed by semantic information recovery, information decoding and task reasoning in the semantic communication receiving end; the semantic representation quantization model quantizes the semantic information representation with a preset precision in the semantic communication sending end, the obtained semantic symbols after quantization are represented by the number of bits, and the obtained semantic symbols after quantization are mapped to constellation points; the adaptive variable-length semantic representation coding model selectively activates the specified dimensions of the semantic information representation in sequence and continuously based on the current channel state and the target task demand condition. The present application improves the transmission efficiency of semantic information and reduces the communication and calculation overhead under the premise of ensuring the multi-task performance.

The invention discloses an ultra-deep diaphragm wall construction dynamic supervision method and system based on the Internet of Things, and the method comprises the following steps: constructing a sensing network composed of edge calculation gateway nodes and multiple types of sensing units, collecting structural response data, such as displacement, inclination, strain, acceleration and the like, and carrying out the caching processing; and switching data processing modes according to the degree of structural disturbance, identifying and eliminating abnormal values by using a Hampl filtering model with a local statistical threshold adjustment mechanism, generating a structured filtering data sequence, carrying out symbol mapping through a sliding window, constructing a symbol track sequence, and executing symbol dynamic entropy calculation to form a local symbol dynamic entropy sequence. And generating a two-dimensional time sequence judgment matrix in combination with the abnormal frequency information, constructing a hierarchical risk coding model, and outputting a digital early warning coding signal with a time identifier and a risk level to a supervision platform and a management terminal to realize dynamic identification and risk response of a construction state.

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.

The invention provides a model training configuration method and a related device. The method is used for configuring at least one first additional module for a first AI training node by an artificial intelligence AI task node. And the first AI training node realizes transmission of data and / or parameters and the like with the second AI training node through the at least one first additional module. The AI task node sends a first request to a first AI training node, wherein the first request is used for requesting the first AI training node to train the first sub-model; the AI task node sends first configuration information to the first AI training node, the first configuration information is used for configuring at least one first additional module, and the at least one first additional module is used for mapping symbols output by the first sub-model into symbols to be output by the first AI training node on an air interface, and / or mapping the symbols to be output by the first AI training node on the air interface. The at least one first additional module is used for converting symbols received by the first AI training node on the air interface into update parameters used for updating the first sub-model.

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.

The application discloses a network attack flow detection method based on a timing probability determination finite automaton, and relates to the technical field of network security, wherein the method comprises the following steps: collecting historical normal flows of a protected destination address, dividing flow streams according to five tuples, combining data packet length distribution to complete adaptive length quantization, and outputting a standardized symbol mapping result; constructing a feature graph node with a quantization interval and a transmission direction, combining data packet hopping and timing interval to construct a flow feature graph, obtaining transition probability and time constraint parameters through global statistical analysis, and constructing a special detection model. In online detection, new flow initialization is completed, state transition verification is carried out according to the model, an abnormal score is iterated through a unified scoring mechanism, the score decay feature and the threshold value are combined to determine the abnormality, and the flow identifier and the violation alarm are output, so that full-cycle anomaly detection is realized. The application realizes high-camouflage attack detection by fusing flow structure and timing characteristics through an automaton, and solves the problem of single feature dimension in traditional methods.

A transmitter in a wireless communication network includes a bits-to-symbol mapper that produces a plurality of data symbols; and a waveform modulator that receives a first discrete-time waveform and at least a second discrete-time waveform that comprises a cyclic shift of the first discrete-time waveform; modulates a first one of the plurality of data symbols onto the first discrete-time waveform and modulates a second one of the plurality of second data symbol onto the second discrete-time waveform, to produce a plurality of modulated discrete-time waveforms; and sums the plurality of modulated discrete-time waveforms to produce a modulated discrete-time signal to be transmitted in the network. The first discrete-time waveform and at least the second discrete-time waveform are multicarrier signals.

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.

The application discloses a PDF engineering drawing cross-terminal synchronization method and system based on operation instruction serialization and a storage medium, and belongs to the technical field of cross-terminal engineering drawing collaborative processing. The method comprises the following steps: capturing operation instructions for a PDF engineering drawing in multiple terminals, extracting operation types, target object IDs and parameters as semantic metadata; constructing a dependency graph of the operation instructions based on the target object IDs, and identifying key path instructions; encoding the operation instructions and the dependency into a serialized format, and transmitting only the instructions of the changed part; analyzing the serialized instructions at a receiving terminal, detecting conflicts based on the semantic metadata, and executing the instructions according to the dependency; and dynamically adapting the rendering result according to device parameters, including coordinate system conversion and symbol mapping. Thus, the problems of synchronization efficiency and accuracy in the prior art are solved, and the effect of real-time, efficient and synchronous consistency of engineering drawings in multiple terminals is realized.

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 apparatus may be configured to process input information including a set of information bits for a quadrature amplitude modulated (QAM) transmission by performing a bit-shaping operation for the set of information bits to generate a set of shaped bits and adding cyclic redundancy check (CRC) bits before forward error correction (FEC) on a combination of the set of information bits and the CRC bits. The apparatus may further be configured to transmit the QAM transmission. The apparatus may be configured to receive a QAM transmission; perform a FEC decoding on the QAM transmission; obtain CRC bits from the QAM transmission after the FEC decoding; and perform a bit level de-shaping operation on a set of shaped bits to obtain a set of information bits.

The application discloses an input method, device and system based on number sequence and number sequence vowel definition and symbol mapping, which comprises the following steps: defining a number sequence and a number sequence vowel set, wherein the number sequence is a fixed sequence of numbers 1-9, 0 and an extended character, the number sequence vowel set comprises 11 groups of vowels arranged according to the number sequence, and each group of vowels corresponds to a unique number sequence coding bit; establishing a mapping relationship between the 11 groups of vowels and a number sequence input unit, wherein the number sequence input unit comprises at least 10 digital key positions and an extended character key position arranged according to the number sequence; and generating a candidate word list according to the defined number sequence and number sequence vowel set and the mapping relationship in response to a user input operation. The application solves the problem of inconsistent coding logic and multiple keystrokes of vowels in the prior art, significantly improves the input efficiency of Chinese pinyin, supports multiple input modes to share a unified coding system and reduces the learning cost of users.

Disclosed in embodiments of the present application are a data processing method, apparatus and system. Specifically, the method comprises: firstly, acquiring p first data streams having undergone RS encoding; then, respectively performing first data processing, which comprises FEC encoding and first interleaving, on the p first data streams to obtain m second data streams, m being an integer greater than or equal to p; and performing second data processing, which comprises second interleaving, dual-polarization (DP)-16QAM symbol mapping and framing, on the m second data streams to obtain one first DP symbol stream, wherein the first DP symbol stream comprises a symbol stream in a first polarization direction and a symbol stream in a second polarization direction. By means of the method, a concatenated FEC transmission scheme is simple to implement, has low power consumption and relatively high burst tolerance, can be applied to more transmission scenarios, and is particularly applicable to actual coherent transmission scenarios where colored noise exists in a channel.

Methods, systems, and devices for wireless communications are described. The described techniques relate to improved methods, systems, devices, and apparatuses that support modulation schemes for nonbinary polar coding. For example, the described techniques may enable a transmitting device to perform a modulation of a set of symbols (e.g., bit pairs) that are encoded using a nonbinary polar encoding scheme. For example, the transmitting device may map each symbol of a set of encoded symbols to a constellation point. Additionally, or alternatively, the transmitting device may convert the encoded symbols into strings of bits. The transmitting device may accordingly perform bit-to-constellation mapping of the resulting bitstring using an existing mapping scheme or by defining a new mapping scheme. A receiving device may demodulate a received message by performing a demodulation of the set of modulated symbols or bits (e.g., and by converting the bitstring into the set of information symbols).

Systems and methods are described for generating and implementing return-link satellite communications using a novel 1+N-ary constellation. The 1+N-ary constellation arranges M (e.g., 8) constellation points in a novel formation that increases their distances from each other relative to conventional M-ary modulation schemes by locating an inner constellation point centrally with respect to an I-Q plane and distributing the remaining N (i.e., M = N + 1) outer constellation points radially around the inner constellation point. 1+N amplitude and phase-shift keying (APSK) modulation can be used to map symbols to the constellation. Embodiments combine the 1+N APSK modulation with additional features, such as non-Nyquist partial response (NNPR) filtering and / or state of the art low-density parity check (LDPC) coding.

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 application relates to a highly efficient high-speed high-order satellite communication carrier synchronization method and apparatus. The method utilizes a power threshold to extract MAPSK inner loop data, effectively reducing the order of high-order MAPSK and lowering the complexity of carrier synchronization acquisition and tracking. A coarse synchronization process enables rapid acquisition with large frequency offsets, while a fine synchronization process tracks small frequency and phase offsets, balancing carrier acquisition time and accuracy. The fine synchronization loop reduces MAPSK phase ambiguity to four levels, achieving low-overhead deambiguity resolution through a synchronization header sequence and a phase ambiguity symbol mapping table.