805 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 provides a time division duplex multi-carrier synchronous transmission method based on 5G, which is used for solving the problems of inflexible carrier time slot allocation and inaccurate time delay compensation in synchronous transmission. By dynamically adjusting time slot allocation and working frequency bands of carriers in a network control center, the method optimizes network loads and reduces cross interference; the time delay of each carrier is compensated in real time by adopting a synchronous signal calibration algorithm, so that strict alignment of transmission time slots is ensured; the transmitting end dynamically adjusts the transmitting power according to link state information, and the receiving end reduces interference and signal attenuation through a multi-carrier cooperative interference management and multi-path delay compensation mechanism; and a receiving end performs joint decoding based on channel estimation and integrates demodulation signals of all carriers, so that the transmission efficiency and the signal quality of the 5G network are improved. The method is suitable for a base station system and a base station and repeater extension coverage system, and is especially suitable for a distributed wireless system including an optical fiber remote distributed system, a cable remote frequency shift repeater system and the like.

Provided is a method for receiving wake-up signals. The method is applicable to a terminal, and includes: receiving a first wake-up signal, wherein the first wake-up signal is defined to indicate reception information of a downlink control channel; wherein the downlink control channel is a first new radio (NR) channel, wherein the first wake-up signal and the first NR channel are both orthogonal frequency-division multicarrier signals, and a numerology of the first wake-up signal is different from a numerology of the first NR channel.

Aspects of the present application relate to a multi-link and / or multi-carrier serving cell configured to enable a flexible, multi-connectivity framework among terrestrial network carriers and non-terrestrial network carriers. Within the multi-link serving cell, uplink carriers and downlink carriers in paired spectrum or unpaired spectrum may be decoupled from each other and or may be shared across different link-types. Multiple downlink carriers may be configured within a single cell (i.e., within a single, multi-carrier cell) and each uplink carrier may be associated with, or linked to, multiple downlink carriers.

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.

Disclosed are methods, systems, and computer-readable medium to perform operations including generating a low-power wake-up signal (LP WUS) having a first portion of information bits carried by one or more orthogonal frequency-division multiplexing (OFDM) symbols via modulation based on multi-carrier on / off keying (MC-OOK) and a second portion of information bits carried by a bit-to sequence mapping on the one or more OFDM symbols; and transmitting, to a set of one or more user equipment devices (UEs), the generated LP WUS.

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.

Disclosed is a windowing method for OTFS-based wireless signals to mitigate interference due to fractional delay and Doppler cases and to control out-of-band emission. The method provides for suitable windowing mechanisms for the multicarrier orthogonal time frequency space (OTFS) scheme in order to manage out-of-band emission and interference due to the limited time and frequency resolution of the OTFS frame.

Systems and techniques are provided for wireless communications. A process can include receiving first configuration information associated with transmission of carrier wave (CW) signals to an ambient Internet of Things (AIoT) device, wherein the first configuration information is indicative of a plurality of candidate frequencies. The process can include determining, based on second configuration information, that the network entity is a valid source for a current CW transmission occasion. The process can include transmitting, to the AIoT device, a first CW signal using a selected frequency of the plurality of candidate frequencies, wherein a transmission power for the first CW signal is based on the second configuration information.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a first resource pool associated with a first component carrier and a second resource pool associated with a second component carrier. The UE may receive an indication of a resource allocation associated with a sidelink communication, wherein the resource allocation is based at least in part on at least one of the first resource pool or the second resource pool. The UE may perform the sidelink communication in accordance with the resource allocation. Numerous other aspects are described.

A method for operating a terminal for radio link management may include: from a first cell, receiving a connection reconfiguration message, for configuring a carrier aggregation function, including configuration information for a second cell; performing a beam and radio link monitoring for the first and second cells; when a beam failure for the second cell is detected, performing at least one from among a procedure of reporting the beam failure to the first and second cells, a procedure of requesting the recovery of the beam failure from the first and second cells, and a beam recovery procedure for the second cell; receiving, from the first or second cell, a control message in response to the report of the beam failure, or in response to the beam recovery procedure; and upon receiving the control message, determining whether the beam recovery procedure is successful or not.

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.

A sidelink (SL) wireless transmit and receive unit (WTRU) may be configured establish a unicast link with a peer WTRU allowing use of a plurality of SL carriers and transmits data, on at least a first SL carrier to the peer WTRU. The WTRU determines a carrier-specific SL radio link failure (RLF) of the first SL carrier based on a number of detected consecutive hybrid automatic repeat request (HARQ) discontinuous transmissions (DTXs) exceeding a threshold HARQ DTX count and performs a SL carrier reselection procedure to select a second SL carrier, excluding SL carriers determined with carrier-specific SL RLF. The WTRU transmits, to the peer WTRU on one of the plurality of SL carriers without carrier-specific SL RLF, an indication of the carrier-specific RLF of the first SL carrier. If no SL available SL carrier remains, the WTRU releases the unicast link with the peer WTRU. Additional embodiments are disclosed.

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.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit capability information that indicates a first quantity of carriers that the UE is capable of using simultaneously. The UE may receive a configuration for a second quantity of activated carriers. The UE may switch one or more carriers used for multi-carrier transmission based at least in part on the configuration and the capability information. Numerous other aspects are described.

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 method of wireless communication by a user equipment (UE) includes receiving, from a base station, a receive chain switching configuration for a multi-carrier environment. The UE also receives a physical downlink control channel (PDCCH) on one or more carriers of the multi-carrier environment with multiple receive chains, in accordance with the receive chain switching configuration. The UE decodes downlink control information (DCI) from the PDCCH for physical downlink shared channel (PDSCH) scheduling across multiple carriers in the multi-carrier environment. The UE performs receive chain switching based on the PDSCH scheduling from the decoded DCI and the receive chain switching configuration.

The invention relates to the field of power line communication, in particular to a power line communication system based on a multi-carrier aggregation technology, which is characterized in that transmission interference characterization values of power line networks in regions are determined based on collected environment characteristics of each region in combination with corresponding sudden noise intensity; the method comprises the following steps of: dividing abnormal tendency categories of transmission work of a power line network in each region according to different regions, and calling related modules for analysis, including obtaining interference characteristic analysis transmission parameters of each branched transmission path in the region, so as to judge whether data signal transmission of the branched transmission path meets a transmission standard or not, and identifying a corresponding offset branched transmission path; analyzing a carrier transmission abnormity characterization coefficient according to the path data signal intensity and the data signal transmission rate so as to identify whether the carrier frequency band of the data signal in each branch transmission path needs to be adjusted; according to the invention, interference factor changes affecting power line communication can be captured in time, a path area where a fault may occur can be identified in time, and the quality of data signal transmission is ensured.

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.