48 results about "Frequency division multiplexed" patented technology

The application discloses an anti-interference pulse laser frequency division multiplexing optical coding wireless communication system and method, provides an optical wireless communication system based on pulse laser, and realizes an anti-interference pulse laser frequency division multiplexing optical coding communication method. Relying on the convergence effect of the light collector, a stable and anti-interference system receiving end is realized, the anti-interference capability of the whole system is realized through a pulse laser source and a multi-channel light splitting module, the utilization rate of the spectrum in the system communication process is improved, and the pulse laser transmission of frequency division multiplexing is realized.

A kind of well temperature field reconstruction and thermal disaster early warning method and system based on acoustic tomography, method: staggeredly arranging explosion-proof loudspeaker array and microphone array on the two sides of roadway in monitoring area;Utilize frequency division multiplexing technology to emit / receive multiple frequency band acoustic waves synchronously, form entity acoustic path data set, and construct overdetermined equation group;Adopt virtual sound line method, realize virtual path enhancement;Realize high-resolution temperature field reconstruction of roadway cross section temperature field in combination with sound velocity-temperature linear model;Continuous multiple frame temperature field images are input into TimesNet model, and multi-scale features are extracted by adaptive period decomposition and two-dimensional space-time convolution, and fire warning grade and abnormal area coordinates are output.The system: including explosion-proof loudspeaker array, microphone array, edge computing node and host computer;Edge computing node is connected with explosion-proof loudspeaker array and host computer respectively.The present application can realize global temperature perception and concealed fire early warning in target monitoring area.

Systems and method provide for uplink carrier aggregation (UL CA) that is configured for a User Equipment (UE), and transmissions on multiple UL carriers by one power amplifier (PA). When a base station (e.g., a gNB) indicates the UE should switch its UL waveform from Cyclic-Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) to Discrete Fourier Transform Spread OFDM (DFT-S-OFDM) for Physical Uplink Shared Channel (PUSCH) transmission in one or more UL carriers, the base station expects that the UE transmit power on a particular carrier can be increased, the carrier for which a UL coverage issue (e.g., low signal strength, signal to noise ratio, interference, etc.) is found. UL waveform switching from CP-OFDM to DFT-S-OFDM can improve the lower bound of PCMAX, namely the total UE transmit power on UL carriers of intra-band CA.

The application discloses a semantic communication method and system based on interleaved frequency division multiplexing, belongs to the field of semantic communication, and is applied to a semantic communication system. The method comprises the following steps: a sending end extracts semantic information through a semantic encoder and transmits the semantic information after modulation through interleaved frequency division multiplexing; a receiving end reconstructs a semantic signal based on a received signal through a cross-domain iterative detector and completes a target task through a semantic decoder. The cross-domain iterative detector performs linear detection in a time domain by utilizing channel sparsity, performs nonlinear detection in a characteristic domain based on a fractional model, and realizes cross-domain transformation through an interleaved frequency division multiplexing modulation matrix with universal characteristics. The application can realize training of an encoder / decoder and decoupling of a channel through interleaved frequency division multiplexing modulation, the channel has strong universality, and the compatibility with an existing digital communication system is good. Since the type of the encoder / decoder is not limited, the whole system can perform multiple tasks, and the task universality is good.

The present disclosure relates to an entity for generating a signal. The entity is configured to generate the signal by precoding a vector, the vector comprising a group of real elements and an offset. The entity is configured to obtain the group of real elements from an orthogonal frequency-division multiplexing (OFDM) signal, and the offset from the group of real elements. Further, the present disclosure relates to an entity for generating an orthogonal frequency-division multiplexing (OFDM) signal. The entity is configured to generate the OFDM signal by grouping samples of a signal in multiple groups, and postcoding each group of the multiple groups to generate postcoded samples of the signal.

The application provides a modulation method and system of an orthogonal frequency division multiplexing signal, and belongs to the technical field of wireless communication. The method comprises the following steps: mapping a frequency domain data signal and a pilot signal to be transmitted into a frequency domain resource grid matrix; performing a frequency domain shift operation on each row vector of the frequency domain resource grid matrix, shifting a zero frequency component to the center of the vector, and obtaining a shifted matrix; and performing an inverse fast Fourier transform on each row vector of the shifted matrix, and obtaining a time domain orthogonal frequency division multiplexing symbol matrix as a modulation result. The application constructs the entire frequency domain resource into a two-dimensional matrix, and all subsequent signal processing operations are based on the row vectors of the two-dimensional matrix as a basic unit, and are completed through a series of explicit matrix and vector operation steps. Thus, the IFFT call for the entire frame, which is a black box, is decomposed into individual steps for a single symbol, which are visible and controllable, and the problem of opaque process is solved.

The application discloses a target channel selection output method and system for frequency division multiplexing superconducting detectors, and belongs to the technical field of digital signal processing and superconducting detector readout electronics. The method aims at the problems of high resolution channelization resource occupation, high full spectrum output bandwidth pressure, and obvious spectrum leakage and crosstalk under high multiplexing ratio. On the basis of high resolution channelization processing, the mapping relationship between target frequency points and channels and the target channel selection output mechanism are introduced. After the wideband digital input signal is processed by the polyphase filter bank channelization, only the complex data corresponding to the target frequency points containing effective signals are selected and output, and are further separated into I / Q data stream output. The scheme combines high resolution channelization processing with the mapping driven selection output mechanism, reduces resource occupation and data transmission bandwidth while ensuring frequency resolution, and improves real-time performance and signal fidelity in the readout scene of high multiplexing ratio detectors.

The application relates to a communication and perception integrated multi-base station cooperative anti-shielding millimeter wave waveform design method, belonging to the field of wireless communication and perception. The application realizes the method as follows: a millimeter wave orthogonal frequency division multiplexing signal model is constructed, a user communication rate model under a random shielding environment is constructed, a millimeter wave orthogonal frequency division multiplexing signal perception performance model is constructed, and a base station cooperation perception model in the random shielding environment is constructed; based on the user communication rate model under the random shielding environment, the base station cooperation perception model in the random shielding environment and performance indexes, according to optimization theory, an anti-shielding orthogonal frequency division multiplexing communication and perception integrated waveform design problem based on multi-base station cooperation is constructed; an anti-shielding random successive convex approximation algorithm is constructed, an optimization problem of the communication and perception integrated millimeter wave waveform design is solved, and thus an anti-shielding orthogonal frequency division multiplexing communication and perception integrated beamforming result based on multi-base station cooperation is obtained, and shielding robust communication and perception are realized according to the beamforming result.

Aspects of this disclosure relate to frequency offset compensation in a radio receiver. In embodiments of the disclosure, a frequency domain orthogonal frequency-division multiplexing signal can be received, and a phase error offset in individual frequency segments of the frequency domain orthogonal frequency-division multiplexing signal can be compensated for based on estimates of the phase error offset for the individual frequency segments. Related radio receivers and radio systems are disclosed.

The application provides a communication method and device. The method comprises: receiving a first signal block. For example, the first signal block can comprise a first signal and a second signal. For example, the first signal can comprise a primary synchronization signal and / or a secondary synchronization signal. For another example, the second signal comprises a physical broadcast channel. The first signal block is carried on at least one symbol. The first signal and the second signal can be frequency division multiplexed on any one of the at least one symbol. The first signal block is communicated. According to the application, different signals in the signal block are frequency division multiplexed on any one symbol, so that the signals originally distributed on different symbols can be transmitted on the same symbol. This means that the symbol originally used for the signal is idle, so that the terminal can be configured to sleep, or be used to transmit other signals. The terminal can be configured to sleep in the time slot originally occupied by the other signal, thereby increasing the time domain position in which the terminal can sleep, and reducing the power consumption of the terminal.

A method according to an embodiment of the present specification comprises the steps of: generating an orthogonal frequency division multiplexing (OFDM) signal; and transmitting the OFDM signal. The OFDM signal is generated on the basis of values of resource elements (REs) based on subcarrier indices. The values of the REs are based on information mapped to the REs. The information mapped to the REs is generated on the basis of the sum of i) data and ii) a phase tracking reference signal (PTRS) to which precoding related to discrete Fourier transform (DFT) has been applied.

Various aspects of the present disclosure relate to an enhanced synchronization signal (SS) block structure or design for 6G radio access technologies and other access technologies. The SS block structures may enable the transmission of physical broadcast channel (PBCH) signals at periodicities different than, unique to, or separate from periodicities of SS bursts, such as SS bursts that comprise multiple synchronization signal (SS) blocks. For example, the synchronization signal block structures may decouple the PBCH (and / or other channels) from the SS, facilitating time division multiplexing and / or frequency division multiplexing of the PBCH with respect to the synchronization signals of the SS block.

This disclosure relates to the optical fiber sensing technology, and more particularly to an optical time-domain reflectometer and an interference fading rejection method, and includes a laser device, a frequency division multiplex modulator, a circulator and a signal processing device, wherein the frequency division multiplex modulator includes a first modulator, a second modulator, a first attenuator and a second attenuator, the laser device is used to acquire a coherent light source, the coherent light source passes sequentially through the first modulator and the first attenuator to acquire the first pulsed optical signal, the coherent light source passes sequentially through the first modulator and the second modulator to acquire the second pulsed optical signal, the coherent light source passes sequentially through the second attenuator and the second modulator to acquire the third pulsed optical signal, and the output of multiple pulsed optical signals can be realized by different combinations of the first modulator, the second modulator, the first attenuator and the second attenuator, saving hardware costs compared to existing technologies.

A TFDM-PON system correction method and device, including OLT receiving ONU based on time division multiplexing or time-frequency division multiplexing sends double polarization signal, it includes target signal sequence corresponding with X / Y polarization, and target signal sequence is IQ period complex signal and its I road and Q road are single tone signal of first frequency and second frequency respectively;Based on the Fourier transform of double polarization signal and frequency domain symmetry, calculate target parameters including target transceiver frequency offset, target transmitting terminal, receiving terminal IQ delay and target power deviation between each ONU, make ONU correct frequency, delay and power according to target parameters, eliminate subcarrier crosstalk caused by frequency offset in TFDM uplink burst transmission, image crosstalk caused by IQ imbalance and performance degradation caused by subcarrier power imbalance, reduce bit error rate, improve system robustness.

Methods, systems, and apparatus for wireless communication are described. The techniques described herein relate to Frequency Division Multiplexing (FDM) of a Demodulation Reference Signal (DMRS). A User Equipment (UE) receives control signaling including configuration for uplink control messages. The UE generates uplink control messages based on the configuration and a first uplink control message format from multiple formats. The uplink control message includes a DMRS in FDM with uplink control information (UCI). The first uplink control message format is associated with a Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform and the number of four or more OFDM symbols. The UE uses the DFT-s-OFDM waveform to transmit the uplink control messages.

Described are methods, systems, and devices for wireless communications. In some systems, user equipment (UE) can communicate on a sidelink channel in a shared (e.g., unlicensed) channel bandwidth. The UE can implement subchannel-based time-share of the unlicensed sidelink to improve resource usage. The UE can take access to the shared channel bandwidth for a time-share, and can transmit a sharing indicator indicating a portion of resources of the shared channel bandwidth for the time-share. The UE can transmit a time division multiplexed sharing indicator to share a portion of time slots of the time-share, a frequency division multiplexed sharing indicator to share a portion of subchannels of the shared channel bandwidth, or some combination thereof. A UE receiving the sharing indicator can identify the shared resources, and can transmit in (e.g., not perform a full contention procedure for) the shared resources.

A resource multiplexing method for sidelink ranging performed by a transmitting terminal includes performing a first sidelink transmission of a sidelink ranging signal and a physical sidelink channel through at least one of a frequency-division multiplexing or a time-division multiplexing within a same time unit. The sidelink ranging signal is a reference signal for measuring at least one of a distance or an angle; and the physical sidelink channel includes at least one of: a first physical sidelink channel for transmitting first sidelink control information; or a second physical sidelink channel for transmitting at least one of second sidelink control information or sidelink data. The first and second sidelink control information are related to at least one of a transmission of the sidelink data or the sidelink ranging signal; and at least one of the first physical sidelink channel, the second physical sidelink channel or a sidelink ranging signal transmission are associated with each other.

A communication method and apparatus are disclosed, applied in the field of communication technology. In this method, a terminal device monitors and schedules a physical downlink control channel for first system information on a first resource, the first system information belonging to a first radio access technology. The first resource and a second resource are time-division multiplexed or frequency-division multiplexed. The second resource is used to transmit a physical downlink control channel for scheduling second system information, the second system information belonging to a second radio access technology. The first and second radio access technologies share frequency domain resources. Therefore, in this method, the time-division multiplexing or frequency-division multiplexing of the first resource used for transmitting the physical downlink control channel for scheduling first system information and the second resource used for transmitting the physical downlink control channel for scheduling second system information can reduce conflicts between the two physical downlink control channels, thus helping to minimize conflicts between the first and second system information.

Various aspects of the present disclosure relate to an enhanced synchronization signal (SS) block structure or design for 6G radio access technologies and other access technologies. The SS block structures may enable the transmission of physical broadcast channel (PBCH) signals at periodicities different than, unique to, or separate from periodicities of SS bursts, such as SS bursts that comprise multiple synchronization signal (SS) blocks. For example, the synchronization signal block structures may decouple the PBCH (and / or other channels) from the SS, facilitating time division multiplexing and / or frequency division multiplexing of the PBCH with respect to the synchronization signals of the SS block.

This invention relates to the field of Internet of Things (IoT) and communication sensing technology for medical devices, and particularly to a centralized management method and system for anesthesia equipment based on IoT. The method includes the following steps: S1: Frequency division multiplexing of high-frequency communication and low-frequency acoustic envelopes to control the array to transmit a composite optical signal; S2: Identifying the end-expiratory phase based on mechanical vibration rhythm to generate a timing gating; S3: Responding to the gating to open the photoacoustic resonant cavity to receive the optical signal; S4: Filtering and separating demodulated data and photoacoustic pressure, extracting base station coordinates and inverting leakage concentration; S5: Optimizing beamforming based on pressure amplitude and bit error rate, and generating a ledger by combining coordinates and concentration. In this invention, by frequency division multiplexing and fusing the high-frequency communication envelope and the low-frequency acoustic excitation envelope, and utilizing a light-emitting diode array to simultaneously achieve downlink communication and photoacoustic sensing excitation, the problem of electromagnetic interference easily caused by traditional RF IoT solutions in the operating room environment is solved.

A reduced capability (redcap) device can perform an initial uplink communication including transmitting a redcap physical uplink control channel (R-PUCCH) on an initial uplink bandwidth part (BWP) shared with a second device, the initial uplink BWP having a bandwidth (BW) that is greater than a maximum BW supported by the redcap device and less than or equal to a maximum BW supported by the second device. Frequency hopping operation of the redcap device can be supported to make the R-PUCCH transmission by a resource set for frequency division multiplexing and / or time division multiplexing of the R-PUCCH transmission and a PUCCH transmission by the second device. When a frequency gap is greater than the maximum BW supported by the redcap device, a restriction can be implemented to create a gap for the redcap device to perform RF retuning between a physical RACH transmission and a subsequent physical control channel (e.g., PDCCH) monitoring for random access reception.

Methods, systems, and devices for wireless communications are described. Described techniques provide for procedures, conditions, and signaling, based on which a user equipment (UE) may determine whether to transmit uplink control information (UCI) via a single repetition or multiple repetitions when two frequency division multiplexed (FDM) repetitions are scheduled for a UE. For example, the network may indicate that the UE is to adopt a first behavior (e.g., transmit UCI via a single repetition) or a second behavior (e.g., transmit UCI via both repetitions). If the UE is configured to transmit the UCI via both repetitions, then the UE may determine if one or more conditions are satisfied. If such conditions are not met, then the UE may default to the first behavior. The UE may determine which behavior to apply based on explicit signaling from the network, a type of UCI, or a combination thereof.

Various aspects of the present disclosure relate to an enhanced synchronization signal (SS) block structure or design for 6G radio access technologies and other access technologies. The SS block structures may enable the transmission of physical broadcast channel (PBCH) signals at periodicities different than, unique to, or separate from periodicities of SS bursts, such as SS bursts that comprise multiple synchronization signal (SS) blocks. For example, the synchronization signal block structures may decouple the PBCH (and / or other channels) from the SS, facilitating time division multiplexing and / or frequency division multiplexing of the PBCH with respect to the synchronization signals of the SS block.

Methods, devices, and system for Enhanced Wideband HF data transmission with adaptive interference avoidance and other improvements. Several embodiments describe a mesh network comprising a plurality of transmitting and receiving nodes in a congested band. The network senses the interference spectrum occupancies at a plurality of receiver nodes and synthesizes transmit waveforms at the transmit nodes so that the spectra of the transmit signals fit into the gaps of the interference spectra at the receiver nodes. The waveform is based on FDM, including OFDM, with adaptive tone suppression at the transmitter. The spectrum occupancy information at each node is continually shared in the background among all nodes using a low data rate, Fountain code with erasure sensing at the receivers, which guarantees robust delivery.

The present disclosure relates to the technical field of communications, and relates to a communication method, a communication device, a storage medium, and a program product. The method comprises: receiving indication information sent by a second device, and determining number N of terminal devices supporting frequency-division multiplexing (FDM), or on the basis of a first parameter, determining the number N of terminal devices supporting FDM. The number of devices supporting FDM in uplink D2R transmission is determined on the basis of the indication information or the first parameter, so that FDM of the devices is performed on the basis of the number of devices supporting FDM, thereby improving the efficiency of a first device in transmitting uplink messages.

The application relates to a frequency division multiplexing ultrahigh frequency RFID label, and relates to the technical field of the frequency division multiplexing ultrahigh frequency RFID label. The application comprises a general basic radiation module configured to work in a predetermined wide frequency band; the general basic radiation module comprises a replaceable frequency point tuning module which is detachably electrically connected to the general basic radiation module; and a standardized interface formed between the two; the replaceable frequency point tuning module is coupled with the general basic radiation module through the standardized interface, and is used for tuning the overall resonance frequency of a resonance unit to a target discrete frequency. The application realizes flexible and accurate configuration of the resonance frequency by modularizing separation of the wideband radiator and the narrowband tuner and designing a standardized coupling interface; meanwhile, the production supply chain is greatly simplified, the material and management costs of the multi-frequency point product are reduced, and the miniaturization of the overall structure is promoted.

The application discloses a multi-port frequency division multiplexing filter, comprising: one or more than one frequency selection filter module, each of which is provided with one input port and one or more than one output port; each of the frequency selection filter modules comprises one or more than one coupling module and one or more than one resonant cavity with different frequencies; the coupling module is used for coupling a frequency signal input through the input port to the resonant cavity with different frequencies; and the resonant cavity is used for completing selective transmission of the corresponding frequency signal and outputting from the corresponding output port. The embodiment of the application realizes the single-cavity band-pass filtering function of adjustable frequency bands. Not only can the problem of XY control line port multiplexing in the field of superconducting quantum computing be solved, but also the multi-section frequency division multiplexing function in other application fields can be realized, which has great significance for promoting the large-scale expansion of quantum processors.

Various aspects of the present disclosure relate to an enhanced synchronization signal (SS) block structure or design for 6G radio access technologies and other access technologies. The SS block structures may enable the transmission of physical broadcast channel (PBCH) signals at periodicities different than, unique to, or separate from periodicities of SS bursts, such as SS bursts that comprise multiple synchronization signal (SS) blocks. For example, the synchronization signal block structures may decouple the PBCH (and / or other channels) from the SS, facilitating time division multiplexing and / or frequency division multiplexing of the PBCH with respect to the synchronization signals of the SS block.

This disclosure relates to the field of oil and gas extraction technology, and in particular to a DC power line carrier communication method, apparatus, measurement and control equipment, and medium, which can solve the problems of synchronous transmission and reception in half-duplex communication and the complexity and redundancy of full-duplex schemes. The method includes selecting at least one of a first communication frequency band and a second communication frequency band to complete data transmission according to data transmission requirements, wherein the first and second communication frequency bands are mutually isolated; in the first communication frequency band, a first mixed signal is received, and a first carrier signal is isolated from the first mixed signal for parsing to obtain control commands; in the second communication frequency band, a second carrier signal characterizing downhole physical feature data is superimposed on the DC power supply base component and encoded to generate a second mixed signal for transmission. By achieving full-duplex communication through frequency division multiplexing, downhole equipment can simultaneously receive control commands and transmit monitoring data, solving the latency problem of half-duplex communication.