133 results about "Symbol mapping" patented technology

The invention discloses a communication method and device, which can improve the PBCH receiving performance of a narrowband terminal while saving the overhead of a common channel. The method comprises the following steps: an RAN node determines the length of a coding bit sequence of a physical broadcast channel (PBCH) according to a first numerical value E1, determines the coding bit sequence according to the length of the coding bit sequence and an information bit sequence of the PBCH, determines M symbols of the PBCH according to the coding bit sequence, and maps the first M1 symbols in the M symbols to a first time frequency resource, and mapping the remaining M-M1 symbols to a second time frequency resource, wherein M and M1 are positive integers greater than 1. Wherein the first numerical value E1 is the product of M1 and the modulation order, and M1 is the number of effective resource elements RE in the first time-frequency resource. The first time-frequency resource and the second time-frequency resource form a PBCH time-frequency resource. The subcarriers occupied by the first time-frequency resource and the second time-frequency resource are not overlapped. And the first type of terminal acquires the first M1 symbols mapped on the first time-frequency resource, and the second type of terminal acquires the M symbols mapped on the PBCH time-frequency resource.

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 communication method and device, which can improve the PBCH receiving performance of a narrowband terminal while saving the overhead of a common channel. The method comprises the step of mapping M symbols of a physical broadcast channel (PBCH) to a PBCH time-frequency resource. The PBCH time-frequency resource is composed of a first time-frequency resource and a second time-frequency resource, and subcarriers occupied by the first time-frequency resource and the second time-frequency resource are not overlapped. Wherein M1 continuous symbols in the M symbols are mapped to a first time frequency resource, the remaining M-M1 symbols are mapped to a second time frequency resource, and M and M1 are positive integers greater than 1. Exemplary, the M1 consecutive symbols may be the first M1 symbols or the last M1 symbols of the M symbols.

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.

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.

A method for transmitting user data from a lower-layer split central unit (LLS-CU) to a radio unit (RU) in a network node of a wireless communication system for transmission by the RU over a wireless interface includes mapping reference symbols to be transmitted by the RU to resource elements to provide mapped data. The mapped data including the references symbols is compressed using a bitmap representation of the mapped data to obtain compressed data. The compressed data is transmitted from the LLS-CU to the RU.

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.

Techniques for managing interference in Joint Communication and Sensing (JCAS) systems are described. In one embodiment, a sensing entity maps a first set of detection-modulated symbols to time and frequency resources of an orthogonal frequency division multiplexing (OFDM) resource lattice, mapping the first set of detection-modulated symbols to a set of comb-structured subcarriers across one or more consecutive OFDM symbols to reduce interference with a second set of modulated symbols within a same frequency bandwidth, and encoding a sensing signal comprising the mapped first set of detection-modulated symbols. Other embodiments are described and claimed.

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 discloses a multi-source data switching device of a microwave laser composite system, and belongs to the field of communication and data transmission. The device comprises a transmission frame generation unit, a channel coding unit, a rate matching unit, an interleaving mapping unit, a symbol mapping unit, a shaping filtering unit, an interpolation data synthesis unit, an interpolation data circulation storage unit, an interpolation coefficient storage unit, an address circulation accumulation unit, a weighted summation unit and a low-pass filtering unit. According to the working states of the laser link and the microwave link, generation and filling of the microwave link transmission signal and the laser link transmission signal are controlled through the rate matching unit, flexible switching of multi-source data of the microwave and laser composite system is achieved, and the overall performance of system transmission is improved.

The invention provides a communication method and a communication device, and relates to the technical field of communication. The method comprises: acquiring M symbols of a physical broadcast channel (PBCH), the M symbols being mapped to PBCH time-frequency resources, the PBCH time-frequency resources comprising a first time-frequency resource and a second time-frequency resource, subcarriers occupied by the first time-frequency resource and the second time-frequency resource not overlapping; wherein M1 symbols in the M symbols are mapped to the first time-frequency resource, the M1 symbols are symbols with indexes from N / Q-M1 to N / Q-1 in the M symbols, the N is a coding bit sequence of PBCH channel coding, the Q is a modulation order of the PBCH, the Q and the N are positive integers, the M symbols are mapped to the second time-frequency resource except the M1 symbols, and the M symbols are mapped to the second time-frequency resource except the M symbols. M and M1 are positive integers greater than 1. According to the method in the embodiment of the invention, the communication effect of the terminal equipment can be improved.

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.

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.

Methods, apparatus, and systems for coded modulation towards data transmissions across optical communication networks are provided. At a network transmitter, sequences of data bits encoded by forward error correction are partitioned and then selectively buffered. Each part of a sequence is mapped to a respective transmission symbol, such that the transmission symbols together represent the whole sequence. Upon receipt of the transmission symbols at a network receiver, two-stage decoding that involves counteractive buffering is used to decode the transmitted symbols. In some embodiments, symbol mapping involves geometric shaping of constellation points by a neural network to maximize generalized mutual information.

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.

A communication method and an apparatus, which can improve the PBCH reception performance of a narrowband terminal while saving overhead of a common channel. The method comprises: a RAN node determining the length of a coded bit sequence of a physical broadcast channel (PBCH) on the basis of a first value E1; determining the coded bit sequence on the basis of the length of the coded bit sequence and an information bit sequence of the PBCH; determining M symbols of the PBCH on the basis of the coded bit sequence; and mapping first M1 symbols among the M symbols to a first time-frequency resource, and mapping the remaining M-M1 symbols to a second time-frequency resource, M and M1 being positive integers greater than 1. The first value E1 is a product of M1 and a modulation order, and M1 is the number of effective resource elements (REs) in the first time-frequency resource. The first time-frequency resource and the second time-frequency resource form a PBCH time-frequency resource, and subcarriers occupied by the first time-frequency resource and the second time-frequency resource do not overlap. A first-type terminal acquires first M1 symbols mapped on the first time-frequency resource, and a second-type terminal acquires M symbols mapped on the PBCH time-frequency resource.

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.