473 results about "Multi carrier" patented technology

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 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 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 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.

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 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.

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.

The present application provides a data transmission method, a network device and a storage medium. The method comprises: first dividing a data sequence to be transmitted into N first sequences, wherein each of the first sequences comprises k(n) pieces of data, M first sequences are single-carrier data sequences, and N-M first sequences are multi-carrier data sequences, where M and k(n) are both positive integers, n=1, 2,..., N, and N is an integer greater than or equal to 2; then separately performing inverse Fourier transform on the N-M first sequences to obtain N-M second sequences; jointly performing inverse Fourier transform on the N-M second sequences and the M first sequences to obtain a data sequence; and subsequently, transmitting the data sequence over a time-frequency resource.

A method, system and apparatus are disclosed. A network node is configured to determine a signaling measurement rule corresponding to measurement of reference signals corresponding to at least one component carrier. The network node is configured to cause a user equipment, UE, to perform at least one measurement based on the measurement rule. In some embodiments, a UE is configured to communicate with a network node and is configured to receive a signaling measurement rule corresponding to measurement of reference signals corresponding to at least one component carrier and perform at least one measurement based on the measurement rule.

Disclosed is a multicarrier (MC) connection design via an intelligent exploitation of the multi-user diversity in delay-Doppler domain. Overall, the technology can play a key role as an enabler technology toward 5G and beyond communications systems with applications of NR-Lite, mMTC, eMBB, URLLC and SURLLC.

A phase generated carrier interrogator comprises: a composite multicarrier synthesizer operable to generate at least one laser modulated carrier signal for modulating a laser radiation source; a power monitoring branch operable to measure a power metric of the laser radiation source; a wavelength reference branch comprising a wavelength reference for wavelength stabilization of the laser radiation source and a wavelength reference detector for measuring the wavelength reference to obtain a wavelength reference signal; and a signal processing module. The signal processing module is operable to: estimate a monitoring power carrier delay, the monitoring power carrier delay describing a propagation delay of the power monitoring signal in a laser power monitoring signal path; and estimating a wavelength reference excess delay using the estimated monitored power carrier delay, the wavelength reference excess delay describing a difference between the wavelength reference power carrier delay and the monitored power carrier delay, the wavelength reference power carrier delay describing a propagation delay of the wavelength reference signal in the wavelength reference branch.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, via a non-anchor cell in a multi-carrier operation, a synchronization signal block (SSB), wherein the SSB is a cell defining SSB (CD-SSB) or a non-cell-defining SSB (NCD-SSB). The UE may initiate a procedure based at least in part on the SSB. Numerous other aspects are described.

The invention provides a wireless communication control method based on a load shedding service, which belongs to the technical field of power control systems and comprises the following steps of: segmenting a load shedding service instruction into data unit packets capable of being transmitted in parallel according to a preset data unit packet length threshold range; dynamically distributing discrete carrier frequency bands for the data unit packet to carry out multi-carrier parallel transmission; scanning a target frequency band to select a subcarrier combination, and dynamically allocating a discrete carrier frequency band for the data unit packet; the terminal randomly accesses on the multi-carrier frequency service channel and uploads data in parallel at the same time; and performing joint recombination on the multi-carrier discrete spectrum data at a receiving end, and recovering an original service instruction. The method has the advantages that discrete frequency band resources are efficiently integrated by combining dynamic carrier allocation with real-time channel scanning. The problem of communication congestion in a terminal dense area is relieved, and frequency spectrum idling in a low-service-density area is also avoided. The multi-carrier parallel transmission is beneficial to improving the spectrum utilization rate, and provides support for massive terminal access in a new energy high-permeability scene.

The invention relates to the technical field of wireless optical communication, and discloses a multi-carrier wireless optical communication physical layer security authentication system and method.The receiving end of the system comprises a multi-receiver joint judgment module, a data gating module, an information sink and at least three receivers; each receiver comprises an optical detector, a cyclic prefix removal module, an FFT (Fast Fourier Transform) module, a receiving end key update storage and watermark generation module, a channel estimation and watermark extraction module, a subcarrier authentication module, a multi-carrier self-adaptive decision judgment module and a multi-carrier integration module; oFDM frequency domain channel response is used as an implicit fingerprint, a self-adaptive switching decision strategy is executed according to the average signal-to-noise ratio, fine recognition of legal device position features is achieved without ranging hardware, IM / DD can be adapted, the problem of imitation attack and replay attack authentication of attackers is effectively solved from the physical mechanism, and the method has the advantages of being high in practicability and high in practicability. And the accuracy and robustness of physical layer authentication are obviously improved.

A terminal includes: a reception unit configured to receive, from a base station, a first signaling including at least information indicating a first cell used for performing multi-carrier scheduling by single control information; and a control unit configured to determine the first cell based on an information element for configuring a serving cell included in the first signaling. The reception unit receives the single control information in the first cell from the base station, and the control unit determines a plurality of scheduled second cells based on the single control information.

A terminal includes: a control unit configured to assume that there are a scheduling cell and a scheduled cell in multi-carrier scheduling by single control information; and a reception unit configured to receive the single control information from the scheduling cell. The reception unit receives a plurality of scheduled cells based on the single control information, and, in a case where the plurality of the scheduled cells include an unlicensed frequency cell, the control unit determines an applicable multi-channel access method or determines an applicable operation related to Type 2 HARQ (Hybrid automatic repeat request) codebook.

Embodiments of the present application disclose a physical downlink control channel monitoring method and device, a terminal device and a network device. The method comprises: a network device sending first information, the first information being used to determine a maximum number limit of PDCCH candidates and / or a maximum number limit of non-overlapping CCEs of a scheduled cell in a time unit in M cells by a terminal device, the scheduled cell being a cell supporting multi-carrier scheduling, and M being an integer greater than 1; the terminal device obtaining the first information; and the terminal device performing PDCCH monitoring according to the maximum number limit of PDCCH candidates and / or the maximum number limit of non-overlapping CCEs. It can be seen that the embodiments of the present application are beneficial to performing PDCCH monitoring in the case of supporting multi-carrier scheduling, and the possibility of reducing the monitoring complexity of PDCCH to save power consumption is realized through multi-carrier scheduling.

A terminal includes a communication unit configured to transmit and receive a multi-carrier signal in a frequency band equal to or higher than a predetermined frequency, and a control unit configured to determine a first frame structure of the multi-carrier signal, wherein in the first frame structure, at least one of a subcarrier spacing and a number of resource blocks in a maximum channel bandwidth, a CP (cyclic prefix) ratio, and a time unit or a frequency unit of scheduling is different from a second frame structure of the multi-carrier signal in a frequency band equal to or lower than the predetermined frequency.