560 results about "Multi carrier" patented technology

The dynamic bandwidth allocation and resource scheduling method based on the 5G network comprises the steps that S1, a base station collects service requests, network loads and channel information of user equipment of the 5G network, and the services are divided into real-time services, big data services, key services and conventional services; s2, the real-time service calculates the bandwidth by using deep learning; the big data service is distributed according to the idle bandwidth and the data volume proportion; key service main and standby links distribute bandwidths; conventional businesses come first and then are subjected to service distribution; s3, the base station maps bandwidth resources by using a multi-carrier and dynamic subcarrier algorithm, and optimizes signal transmission in combination with a beam forming technology; s4, processing service data according to a priority scheduling queue, and verifying signal transmission according to a channel quality adjustment coding mode; and S5, updating the data and evaluating the effect according to the user feedback, and re-optimizing the scheduling strategy as required. Through intelligent dynamic bandwidth allocation and resource scheduling, efficient, flexible and reliable transmission of different types of services is realized, and the network resource utilization rate and the service quality are improved.

The invention discloses a low-altitude target sensing method, a low-altitude target sensing device and a low-altitude target sensing system based on multi-base station cooperation. The low-altitude target sensing method comprises the following steps: performing down-conversion, cyclic prefix removal, discrete time sampling and DFT on a received time domain OFDM signal to obtain a frequency domain discrete signal observed quantity; smoothing the frequency domain discrete signal observed quantity into a plurality of sub-signal observed quantities by constructing a reconstruction rotation matrix and a reflection coefficient matrix; obtaining a parameter estimation result by using a four-dimensional joint ESPRIT algorithm; clustering the positioning estimation result of each ISAC base station by setting a threshold value; and based on the positioning estimation result of each ISAC base station, analyzing to obtain the real movement speed of the low-altitude target. Aiming at a one-transmitting-multiple-receiving multi-base-station cooperative sensing low-altitude target scene, multiple receiving stations cooperatively fuse the sensing data of each station, perform cooperative positioning on a low-altitude target, analyze the real three-dimensional speed of the target, fully utilize the observation information of each base station, and combine the good anti-interference performance and multi-carrier characteristics of OFDM signals, so that the multi-base-station cooperative sensing low-altitude target positioning method is realized. And multi-parameter joint estimation of the low-altitude target is realized.

The invention provides a visual underwater sensor network simulation method, and relates to the technical field of underwater sensor networks, and the method comprises the steps: configuring network simulation parameters which comprise topological structure parameters, channel parameters and simulation parameters; inputting the channel parameters into an underwater acoustic calculation tool to generate an underwater acoustic multipath channel for simulation; the bit error rate BER of the multi-carrier MFSK underwater acoustic communication algorithm under the underwater acoustic multipath channel condition is calculated, and the bit error rate BER is input into the OTcl script; performing network simulation on the configured OTcl script by using an underwater network simulator; and displaying a network simulation result through a visual interface. The underwater sensor network simulation result can be displayed through the visual interface, the defect that current NS2-based underwater sensor network simulation software does not have a visual interface is overcome, a good man-machine interaction interface can be provided for a user, the development efficiency is improved, and the user is helped to better evaluate the performance of the underwater sensor network.

The invention discloses a microwave radio frequency waveform array optimization method, and relates to the technical field of signal processing, and the method comprises the steps: S1, monitoring an original link of a target multi-carrier system in real time, obtaining channel state data from the original link, screening out the channel state data, and marking the channel state data as an abnormal link segment; s2, calculating an antenna gain and a compensation coefficient by using a minimum variance undistorted response method; s3, applying each compensation coefficient to a corresponding abnormal link section to obtain an actual gain value; s4, compensation coefficient numerical value supplementation is carried out on the actual gain values which do not reach the distribution gain values; and S5, marking the abnormal link section reaching the distribution gain value as a correction link section, and reapplying the correction link section to the original link to generate channel correction data. According to the method, the antenna gain and the beam forming are optimized by monitoring in real time and using the MVDR method, so that the system can dynamically adjust the beam direction among a plurality of link sections, and the method has the advantages of reducing beam forming offset and being capable of correcting the system in real time.

The present disclosure is to perform multi-carrier scheduling in a wireless communication system, a method of operating a user equipment (UE) may include performing an access procedure with a base station, performing a connection establishment procedure for a primary cell with the base station, performing a connection establishment procedure for at least one secondary cell with the base station, receiving downlink control information (DCI) from the base station and receiving data using resources indicated by the DCI.

The invention provides an unmanned aerial vehicle communication link cracking method and system based on a chaotic modulation waveform. The method comprises the following steps: generating a receiving signal matrix by using a mixed index multi-carrier chaotic signal, carrying out separation operation on an index bit characteristic and a modulation bit characteristic which are mixed and superposed in the matrix, generating an independently modulated carrier component set, and then adjusting a beam forming direction of a multi-channel antenna array according to a frequency band distribution range of the set. The method comprises the following steps: generating a carrier component signal, then performing matrix reconstruction on the carrier component signal, removing environmental noise components, extracting a corresponding chaotic waveform base vector, and finally generating a spreading code sequence according to a modulation symbol mapping relation between the chaotic waveform base vector and a target unmanned aerial vehicle; according to the technical scheme provided by the invention, the problems that a traditional method is poor in adaptability to aperiodic chaotic signals and insufficient in hybrid feature decoupling precision are solved, the anti-interference capability of target signals is improved, and efficient reverse analysis and spreading code accurate reconstruction of an unmanned aerial vehicle communication protocol in a complex electromagnetic environment are realized.

The invention relates to the technical field of 5G communication, in particular to an optimization method of a high-performance 5G communication module. Comprising the following steps: acquiring key operation parameters in a multi-carrier concurrent state, and constructing a characteristic graph model reflecting a parameter evolution relationship; mining a state clustering mode through a graph polarization spectral clustering algorithm, and identifying key paths and core parameter nodes which influence communication performance in combination with a multi-hop path optimization algorithm of a graph attention mechanism; taking the key path strategy graph as input, combining target communication scene features, and adopting a graph structure alignment meta-learning algorithm to generate an optimal parameter configuration strategy; the strategy is applied to an actual module, a self-adaptive control model fusing fuzzy reasoning and reinforcement learning is constructed, and dynamic evaluation of the strategy execution effect and fine parameter tuning are achieved. According to the invention, the performance scheduling efficiency of the 5G communication module under the complex network condition is improved, and the intelligence, generalization ability and scene adaptability of the system are obviously enhanced.

The invention discloses a multi-carrier multi-system differential chaos shift keying modulation and demodulation method and system based on improved code index modulation, and relates to the technical field of communication signal processing. The method comprises the following steps: at a sending end, converting information to be transmitted into N groups of parallel information, dividing each group into index bits and modulation bits, converting each group of index bits into decimal numbers, and modulating the modulation bits; acquiring a reference signal; the reference signal and the information signal are multiplied by a carrier and transmitted into a channel. At a receiving end, the reference signal and the information signal are recovered through multi-carrier demodulation; the method comprises the following steps: multiplying an information signal by a Walsh code, performing related demodulation on a sequence of a reference signal and the information signal, obtaining a sequence number with maximum energy in the information signal, recovering a code index value, converting the code index value into a binary number, recovering an index bit, obtaining a related demodulation result, demodulating and recovering a modulation bit, and outputting original information after conversion. According to the invention, the problems of high bit error rate, poor bit error rate performance and low data rate of the existing MC-DCSK modulation and demodulation method can be solved.

A system and methods for beam failure recovery and management for multi-carrier communications with beamforming are disclosed herein. A wireless transmit / receive unit (WTRU) may monitor for and detect a beam failure of a beam associated with a secondary cell (Scell). The WTRU may select an Scell candidate beam. The WTRU may transmit using a selected uplink (UL) resource in a primary cell (SpCell) a medium access control (MAC) control element (CE) including an indication of Scell beam failure and identifying the selected candidate beam. The WTRU may receive an Scell beam failure indication response on the SpCell indicating an SCell index and a downlink (DL) quasi co-location (QCL) reference associated with the Scell. The WTRU may verify that the DL QCL reference matches with the candidate beam. The WTRU may perform random access on the SCell using the selected QCL reference and the selected candidate beam.

The invention provides a hidden backscatter communication method based on multicarrier randomized continuous waves. The method comprises the following steps: acquiring multicarrier randomized continuous wave signal characteristic parameters, backscatter signal characteristic parameters and channel parameters between a transceiver and a listener and between the transceiver and each user; according to the characteristic parameters of the multicarrier randomized continuous wave signal and channel parameters between the transceiver and the listener and between the transceiver and each user, determining relative entropy between probability density functions of the listener receiving signal when the user generates a backscattering signal and when the user does not generate the backscattering signal; determining the total reachable rate between the transceiver and all users according to the multicarrier randomized continuous wave signal characteristic parameters, the backscattering signal characteristic parameters and the channel parameters; and maximizing the total reachable rate through a target optimization algorithm by taking the condition that the relative entropy meets the concealment condition as the constraint, and obtaining the optimized statistical characteristic parameters of the multicarrier randomized continuous waves. According to the invention, hidden backscatter communication can be realized.

The invention provides a data transmission method and device and a storage medium, relates to the technical field of communication, and is used for improving spectrum efficiency. The method comprises the following steps: dividing data to be transmitted into N first sequences; in the N first sequences, M first sequences respectively correspond to a single-carrier sub-band, K first sequences respectively correspond to a multi-carrier sub-band, N is a positive integer, M is a positive integer smaller than N, and K is equal to N-M; based on the N first sequences, N second sequences are obtained, and the N second sequences comprise sequences obtained after Fourier inverse transformation and cyclic prefix adding operation are sequentially carried out on the first sequences corresponding to the multi-carrier sub-bands, and sequences obtained after cyclic prefix adding operation is not carried out on the first sequences corresponding to the single-carrier sub-bands; obtaining a time domain data sequence based on the N second sequences; and transmitting the time domain data sequence on the transmission resource of the data to be transmitted.

The invention relates to an electric power communication system optimization technology, in particular to a physical layer security optimization method and equipment for a full-duplex multicarrier power line communication system, and the method combines a full-duplex technology and a time domain artificial noise auxiliary security strategy to construct a multicarrier power line communication system model with a relay; generating a safety rate maximization problem, designing a set of convex approximation method, and performing conversion and simplification of a non-convex optimization problem; designing an iterative solution algorithm, and jointly optimizing the confidential data of the source node, the confidential data of the relay node and the artificial noise power distribution matrix; and optimizing the physical layer safety performance of the full-duplex multi-carrier power line communication system based on the solved power distribution matrix. According to the communication scheme and the solved power distribution vector, the safety performance of the power line communication system is optimized, the limitation of the number of power transmission cables in the power line communication system is avoided, the safety rate maximization of the total transmitting power domain can be realized, and the technical problem that data in an existing multi-hop power line communication system is prone to leakage is solved.

Methods, systems, and apparatuses are described for wireless communications. Cells may be grouped into a plurality of cell groups. A base station may transmit a control message to modify a cell group of a cell associated with a wireless device.

In sidelink carrier aggregation, a first user equipment (UE) transmits data packets to a second UE using a plurality of carriers. The second UE transmits Hybrid Automatic Repeat Request (HARQ) ACK / NACK information for the data packets to the first UE via one or more Physical Sidelink Feedback Channels (PSFCHs). The aggregated carriers may be constrained to have the same PSFCH configuration, or not. Resource selection for PSSCH transmission may be performed by considering scheduled PSFCH so as to conform to transmit capability limitations and / or a half-duplex limitation of the first UE and / or the second UE. The PSFCH may be transmitted on a single carrier of said plurality, but include joint HARQ feedback for each of the carriers. Furthermore, HARQ feedback may be transmitted on a Physical Sidelink Shared Channel (PSSCHs), being signaled by the receive UE (i.e., the UE that transmits the feedback) via sidelink control information (SCI).

The invention discloses an imitated radio frequency division multiplexing signal detection method based on low-complexity optimization expected propagation, and belongs to the signal detection technology of multi-carrier communication. According to the method, information is updated through iteration to approach an ML result, and the complexity is reduced from an exponential level to a cubic level; in order to reduce the complexity of the EP, sparse and quasi-banded channel structures in the DAFT domain are utilized. Through matrix block decomposition, upper and lower triangular decomposition and upper triangular matrix forward substitution, low-complexity matrix inversion is successfully realized, and the complexity of the EP algorithm is reduced to a linear level. In addition, the EP algorithm performance is further improved through a deep learning optimization moment matching strategy, so that the process becomes more adaptive through trainable positive and negative component parameters. In addition, DAFT domain iteration detection and decoding can be achieved based on the method, external information of a decoder is fed back to a detector, and the reliability of the whole system is remarkably improved. According to the invention, effective balance between performance improvement and calculation complexity is realized.

Techniques are described that provide for waveform selection for uplink (UL) and / or downlink (DL) wireless transmissions based on one or more factors associated with the wireless transmission, a transmitter that is to transmit the wireless transmission, or combinations thereof. UL and DL transmissions may use one of a number of different waveforms, such as single-carrier waveforms that use a single carrier for information transmission of a wireless channel, and multi-carrier waveforms that use multiple carriers at different frequencies to transmit some of the bits on each channel. Multi-carrier transmission waveforms or single-carrier waveforms may be selected for wireless transmissions based on a bandwidth allocated for the transmissions, a capability of a transmitter that is to transmit the transmissions, or combinations thereof.

The invention provides a data transmission method and device and a storage medium, relates to the technical field of communication, and is used for flexibly fusing different data types and improving spectrum efficiency. The method comprises the following steps: dividing data to be transmitted into N first sequences; in the N first sequences, M first sequences respectively correspond to a single-carrier sub-band, and K first sequences respectively correspond to a multi-carrier sub-band; within a time domain symbol length, the number of data of the first sequence corresponding to the multi-carrier sub-band is smaller than the number of data of the first sequence corresponding to the single-carrier sub-band; obtaining N second sequences based on the N first sequences; performing first inverse Fourier transform on the N second sequences to obtain N third sequences; performing second inverse Fourier transform on the N third sequences to obtain a time domain data sequence; and transmitting the time domain data sequence on the transmission resource of the data to be transmitted.

A wireless transmit / receive unit (WTRU) may determine to transmit or receive a first sidelink (SL) transmission using first SL resources using a first carrier, and transmit a second SL transmission using second SL resources using a second carrier. The second SL resources may include an overlapping period, in which the second SL resources overlap with the first SL resources. If the overlapping period is in the last one or more symbols of the second SL resources, the WTRU may transmit, using the second carrier, at least part of the second SL transmission using a first set of symbols of the second SL resources in the overlapping period and not transmit, using the second carrier, a part of the second SL transmission using a second set of symbols of the second SL resources in the overlapping period. The WTRU may transmit or receive the first SL transmission in the overlapping period.

The invention provides a data transmission method and device and a storage medium, relates to the technical field of communication, and is used for flexibly fusing different data types and improving spectrum efficiency. The method comprises the following steps: dividing data to be transmitted into N first sequences; in the N first sequences, M first sequences respectively correspond to a single-carrier sub-band, K first sequences respectively correspond to a multi-carrier sub-band, N is a positive integer, M is a positive integer smaller than N, and K is equal to N-M; within a time domain symbol length, the number of data of the first sequence corresponding to the multi-carrier sub-band adjacent to the single-carrier sub-band is smaller than the number of data of the first sequence corresponding to the single-carrier sub-band; obtaining K second sequences based on the K first sequences; obtaining a time domain data sequence based on the K second sequences and the M first sequences; and transmitting the time domain data sequence on the transmission resource of the data to be transmitted.

The invention provides a multi-carrier using method and device and a storage medium, relates to the technical field of communication, and is used for improving the network performance of a wireless communication system. The method comprises the steps that at most M carriers are simultaneously used for transmission in a switching mode based on a switching pattern, the M carriers belong to N carriers which are configured for a first node and are activated, M is smaller than N, and both M and N are positive integers.

Systems and methods for allowing an Internet of Things device to circuit switch among embedded subscriber identity modules (eSIMs) are provided. A communication circuit for operating a plurality of eSIMs may include a first and second eSIM. The communication circuit may further include an eSIM card interface bus configured to provide signals to and from the eSIMs, the bus including a data line adapted to receive a data signal. The communication circuit may further include an eSIM select line configured to receive an eSIM select control signal to select between the eSIMs to communicate with a wireless network. The communication circuit may further include a selector connected to the eSIM select line, the selector adapted to switch the data signal between the first and second channel to provide the data signal to the first and second eSIMs based at least in part on the eSIM select control signal.

A method for operating a user equipment (UE) in order to perform multi-carrier scheduling in a wireless communication system disclosed herein may comprise the steps of: performing an access procedure with a base station; performing, with the base station, a connection establishment procedure for a primary cell; performing, with the base station, a connection establishment procedure for at least one secondary cell; receiving downlink control information (DCI) from the base station; and receiving data by using resources indicated in the DCI.

The invention provides a signal transmission method and device, and the method comprises the steps: receiving first information, the first information is used for indicating a first index corresponding to a first signal, the first signal is borne in a single carrier for transmission, the first index is used for indicating a first parameter group in a first incidence relation, and the first parameter group is used for indicating a second parameter group in a second incidence relation; the first association relationship comprises a plurality of indexes and a plurality of parameter groups corresponding to the plurality of indexes respectively, the first parameter group is a parameter group associated with the first index, the parameter group comprises a sampling frequency and / or a symbol rate, the sampling frequency is equal to a sampling frequency corresponding to a subcarrier interval of multiple carriers, and the symbol rate is equal to the sampling frequency corresponding to a subcarrier interval of the multiple carriers. The symbol period determined based on the symbol rate is equal to the symbol period of one subcarrier interval of the multicarrier, and transmitting the first signal according to the first parameter group, so that the communication device can transmit and receive a single-carrier signal and a multicarrier signal through the same set of parameters, thereby reducing the implementation complexity and saving the cost.

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.

Disclosed in the embodiments of the present disclosure are a method and apparatus for determining location information of a control resource, which can be applied to a communication sy stem. When executed by means of a terminal, the method comprises: according to a specified offset value, determining location information of a control resource that corresponds to control information to be detected, wherein the control information is used for scheduling a multi-cell or multi-carrier data transmission. By implementing the method in the present disclosure, a terminal can effectively realize accurate detection of control information for multi-cell scheduling, thereby reducing the probability of congestion of control information on different cells or carriers.

The invention provides a multi-carrier modulation-based common-inductance integrated waveform design method and system, and belongs to the technical field of multi-carrier communication. The method comprises the following steps: constructing a mapping relationship between different service types and waveform parameters; determining a waveform parameter of the subcarrier according to the current service type and the performance index requirement corresponding to the service type, and adjusting the waveform parameter; determining the total number of subcarriers according to the network mode and the service type; performing state detection on the communication channel by taking the total number of the subcarriers as the maximum number of the subcarriers so as to adjust waveform parameters of the subcarriers; and based on the adjusted waveform parameters of the subcarriers, synthesizing a flux-inductance integrated waveform. According to the invention, analysis of communication and sensing tasks can be carried out at the same time based on the same hardware, and dynamic adjustment of subcarrier related parameters and number is realized so as to meet the requirements of different application scenarios on transmission waveforms.

Disclosed in embodiments of the present disclosure are a method for determining multi-carrier frequency carrier phase positioning capability and an apparatus. The method comprises: a terminal device sends positioning capability information to a network side device, wherein the positioning capability information is used for indicating capability information of multi-carrier frequency positioning signal transmission (S21). The terminal device is supported to report the positioning capability information, so as to improve the flexibility of the terminal device and improve the accuracy of positioning measurement.

The embodiment of the invention relates to a method and device for user activity detection (UAD). A terminal device receives a configuration associated with a set of subcarriers from a network device in a radio access network, where the set of subcarriers is associated with a set of terminal devices in the radio access network for transmitting a modulated conjugate symmetric signal, the modulated conjugate symmetric signal indicates activity information of an active terminal device set in the terminal device set; and transmitting a modulated conjugate symmetric signal, where the modulated conjugate symmetric signal is generated by modulating subcarriers from the set of subcarriers with symbols, and the modulated conjugate symmetric signal includes sparse multicarrier (MC-FTN) conjugate symmetric signaling that is faster than Nyquist. In this way, a new solution for reducing latency and measurement resource costs for UAD for large-scale access is provided.

Certain aspects of the present disclosure provide techniques for multi-carrier on-off keying communications. A method for wireless communications by an apparatus includes receiving a signal comprising multiple carrier frequencies modulated with on-off keying; decoding the signal based at least in part on a delta frequency being associated with a first carrier frequency and a second carrier frequency among the multiple carrier frequencies; and recovering data from the decoded signal.

Controlling carrier shutdown in a multicarrier cellular network includes a coverage cell in the multicarrier cellular network obtaining information about an active antenna unit (AAU) configuration of one or more capacity cells paired with the coverage cell. The coverage cell transmits information about a coverage cell load and a carrier borrowing capability of an AAU of the coverage cell to a paired capacity cell. And each paired capacity cell determines whether the carrier borrowing of the coverage cell meets the carrier turn-off entry condition of the capacity cell according to the carrier borrowing capability. The OFF carrier borrowing determines a capacity cell that satisfies the carrier OFF entry condition, while if the coverage cell determines that a carrier borrowing condition is satisfied, the coverage cell borrows a carrier of an OFF capacity cell using the AAU configuration of the capacity cell to activate a borrowed carrier.