82 results about "Time multiplexing" patented technology

The invention relates to the technical field of underwater communication, in particular to a collision avoidance method suitable for digital underwater acoustic communication, which is characterized in that a neighbor propagation delay mapping database is maintained at each communication node, and inter-node propagation delay information is acquired through passive monitoring and active detection. When a node wants to send data, combining delay mapping to predict a channel occupation time slot, and judging whether the sending is conflicted with an RTS / CTS handshake stage, a data transmission stage and an ACK (Acknowledgement Character) confirmation stage which are carried out by a neighbor; if a conflict risk exists, the node delays to send the RTS and then initiates handshake until the security window is finished, so that collision caused by hidden nodes and exposed nodes is avoided, meanwhile, parallel transmission under the conflict-free condition is allowed, the channel space-time multiplexing efficiency is improved, the network throughput can be remarkably improved, the data packet collision rate is reduced, and the network performance is improved. And the node access fairness is improved.

The invention discloses a national cryptographic algorithm acceleration system supporting SM4-ZUC dual-core dynamic collaboration, and belongs to the technical field of information security and hardware acceleration. The system comprises an AXI read-write module, a configuration register module, an SM4 algorithm module and a ZUC algorithm module. The configuration register receives and distributes information such as a secret key, an initial vector and a mode through an APB interface; the AXI read-write module supports burst transmission and dynamic scheduling data read-write; the SM4 algorithm module supports three modes of GCM, CTR and ECB; and the ZUC algorithm module is compatible with ZUC-128 / 256. And the corresponding ZUC-128 / 256 and SM4 algorithms can be dynamically selected for operation by judging an encryption mode in the ZUC and SM4 algorithms. The system adopts a three-level assembly line architecture, space-time multiplexing of read-write data and encryption is realized, and throughput rate is improved.

The invention provides a brain electrical stimulation control method and device, a medium and computer equipment, and the method comprises the steps: setting an electrical stimulation period time signal through a local control module, and dividing the electrical stimulation period time signal into a stimulation stage, a window stage and a recovery stage with continuous time periods; in the stimulation stage, an electrical stimulation signal with preset parameters is output through the time-multiplexed electrode slice; in the empty window stage, disconnection or hardware protection is carried out on the electrode slices to shield crosstalk of stimulation signals to an electroencephalogram acquisition channel; in the recovery stage, electroencephalogram signals are collected and subjected to suppression algorithm processing to eliminate residual artifacts, and in the recovery stage, the collected electroencephalogram signals are subjected to suppression algorithm processing to eliminate residual low-frequency artifacts of electrode capacitance. The problems of hardware redundancy and artifact interference of an existing electrical stimulation system are effectively solved, and accuracy and safety are improved.

The invention relates to the technical field of video collection, in particular to a video synchronous collection method and device based on an optical far image, and provides the following scheme: obtaining a calibration image of to-be-synchronized content and a user posture parameter; calculating a geometric mapping matrix and a point spread function through the calibration image and a preset calibration sequence, and performing geometric predistortion and frequency domain compensation on the to-be-synchronized content to obtain a compensation frame; and combining with the rotation range predicted by the attitude parameters, generating a sub-frame sequence by adopting multi-view rendering of time multiplexing, and outputting the sub-frame sequence by a display end, so as to realize stable far-image watching experience under the condition of small desktop size. According to the scheme, visual fatigue caused by close gaze can be relieved, and the intelligent level of learning interaction is improved.

A compact grating-mirror magneto-optical trap (GMOT) cold atom inertial sensor head is disclosed. To make the sensor head compatible with the high vibration levels encountered in dynamic environments, the number of optical ports in the vacuum chamber is minimized and various components, including fixed optical components and a reflective grating chip, are hard mounted within the vacuum chamber. The use of the reflective grating chip reduces the number of optical ports required for cooling beams from six to one. The number of optical ports is further reduced by time multiplexing multiple beams passing through a given optical port.

The present disclosure relates to a system and a method of performing Gaussian boson sampling via time multiplexing correlation of squeezed vacuum states for quantum information experiments. One embodiment relates to a method for performing Gaussian boson sampling comprising the steps of—generating a set of pulsed pairs of squeezed vacuum states,—performing time 2024 / 038212 multiplexed correlation of multiple of such pairs of squeezed vacuum states,—measuring, via a homodyne detection, a state from the pairs of generated squeezed vacuum states,—feed-forwarding the homodyne result of the measured states to a displacement unit,—performing displacement operations on the remaining state from the pairs of generated squeezed vacuum states, and—counting the states output from the displacement unit.

The embodiment of the invention provides a magnetic resonance imaging method and related equipment. The magnetic resonance imaging method comprises the following steps: applying a multi-spin echo sequence in each magnetization reset period, and collecting a group of multi-spin echo data sets until M groups of multi-spin echo data sets are obtained; after each magnetization reset period, a T1rho preparation pulse with spin locking duration is applied, then a multi-gradient echo sequence is applied, a group of multi-gradient echo data sets are collected until M groups of multi-gradient echo data sets are obtained, and the M groups of multi-spin echo data sets and the M groups of multi-gradient echo data sets correspond to M different spin locking durations respectively; and performing fitting operation on the M groups of multi-spin echo data sets and the M groups of multi-gradient echo data sets to generate a quantitative atlas. According to the technical scheme, the problems that a traditional T1rho sequence is long in scanning time, low in signal-to-noise ratio and single in contrast ratio are effectively solved, and the technical effects of time multiplexing and multi-contrast imaging are achieved.

The invention relates to a frame extraction method and system for a streaming media monitoring video, and the method comprises the steps: a streaming media server receives a frame extraction request sent by a third-party platform, obtains and analyzes a monitoring video stream according to the frame extraction request, carries out the frame extraction of the monitoring video stream according to the frame extraction parameter of the frame extraction request, and carries out the frame extraction of the monitoring video stream; and storing the obtained target binary video frame data to a data cache queue so as to consume and obtain the target binary video frame data from the data cache queue, and performing compression decoding on the target binary video frame data according to an output format of a third-party platform, and returning the compressed and decoded target binary video frame data to the third-party platform. Therefore, the frame extraction logic is embedded in the streaming media server, one-time analysis and multi-time multiplexing are achieved, resource loss is reduced, the resource utilization rate is increased, the response time is shortened by using the data cache queue, and the stability and expandability of the system are maintained.

The invention discloses a signal processing method, a data transmission device, a readable storage medium and a program product, and the method comprises the steps: obtaining a first signal and a second signal, the first signal comprising normal monitoring overhead, and the second signal comprising logic monitoring overhead; demultiplexing the second signal to obtain a third signal, wherein the third signal comprises normal monitoring overhead; multiplexing the first signal and the third signal into a fourth signal to generate a logic monitoring overhead of the fourth signal, and storing the logic monitoring overhead of the second signal in the overhead of the fourth signal; and sending the fourth signal. According to the signal processing method provided by the embodiment of the invention, a multi-time multiplexing effect can be realized through logic monitoring overhead and one-time real multiplexing, multi-time real multiplexing is avoided, the signal rate is reduced, and meanwhile, the logic monitoring overhead of the fourth signal can be ensured not to be influenced by failure of the first signal and the second signal.

The application discloses a single-beam imaging device and method, and belongs to the technical field of microscopic imaging. The application adopts a single beam, utilizes the principle of time multiplexing continuous wave beam wavefront and fluorophore time suppression process, carries out time modulation between short time and long time, carries out wavefront modulation between excitation and suppression to realize imaging, simplifies the structure of the imaging device, and improves imaging super-resolution.

The invention discloses a unilateral matrix converter system for PMSM (permanent magnet synchronous motor) driving application. The unilateral matrix converter system comprises a three-phase input end, a unilateral matrix conversion module, a control module and an output end, the matrix transformation module is composed of a plurality of one-way IGBT power switches, switching is carried out between input phases through a time multiplexing strategy, and direct alternating current to alternating current energy transmission without an intermediate direct current link is achieved. The system adopts a most positive and negative phase selection algorithm and a V / f control strategy, and the output voltage and frequency are adjustable. Compared with a traditional AC-DC-AC system, the AC-DC-AC system does not need a high-capacity capacitor, is simple in structure and low in control complexity, has the energy conversion efficiency as high as 85-90%, has high reliability, light weight and modular expansion capability, and is suitable for aerospace and high-performance motor driving application.

A kind of multi-path serial exchange FFT IP core based on time multiplexing constant multiplier belongs to digital signal processing technical field, solve existing time multiplexing constant multiplier when adapting MSC architecture FFT, there is the problem of collaborative conflict with serial exchange data scheduling, hardware resource redundancy, poor point number expansibility, timing and signal quality imbalance and lack of supporting efficient data permutation scheme, including multi-path serial exchange FFT architecture, the architecture includes: memory-based permutation module, a plurality of general rotator and at least two base modules, wherein k is positive integer;The rotator in the base module is optimized using time multiplexing constant multiplier, and the time multiplexing constant multiplier is used to implement the multiplication operation of fixed constant and variable input;The IP core supports the FFT calculation of point number 2 power exponent.This application is suitable for digital signal processing scene.

An electronic circuit includes: a main controller; and multiple modules; wherein the main controller includes: a timing signal generator arranged to generate a timing signal; and a data signal generator arranged to generate a data signal; wherein the main controller is arranged to generate a combined signal based on both the timing signal and the data signal; and wherein the main controller is arranged to broadcast the combined signal to the multiple modules. By broadcasting the timing signal and the data signal together to the modules, available bandwidth is effectively utilized without requiring numerous separate signal paths to each module or time multiplexing of the signals. Therefore, accurate time synchronization can be achieved, enabling the system to operate effectively at high switching frequencies. Since the switches on the modules are not directly controlled by the main controller, the system provides a distributed architecture where the processing of received signals can be performed locally on each module.

An electronics circuit, comprising: a master controller; and a plurality of modules; wherein the master controller comprises: a timing signal generator arranged to generate a timing signal; and a data signal generator arranged to generate a data signal; wherein the master controller is arranged to generate a combined signal based on both the timing signal and the data signal; and wherein the master controller is arranged to broadcast the combined signal to the plurality of modules. By broadcasting the timing signal to the modules along with the data signal, the available bandwidth is effectively utilised without requiring a large number of separate signal paths to each module and without time multiplexing the signals. Thus accurate time synchronisation can be achieved such that the system can operate effectively at a high switching frequency. As the switches on the modules are not directly controlled by the master controller, the system provides a decentralised architecture in which processing of the received signals can be done locally on each module.

To provide an antenna system for satellite communication that includes a platform upon which several phased antenna arrays are mounted and which can communicate with satellites, and that is capable of being reconfigured in real time.SOLUTION: An asset 200 capable of communicating with a plurality of satellites can couple a plurality of computers 1 to n to any modems MD1 to MDn via a router 210, and can couple the plurality of modems MD1 to MDn to any antennas ESA1 to ESAn via a switch mechanism 205. The plurality of antennas ESA1 to ESAn are composed of phased array antennas and theses can be changed and controlled by a control circuit 215.SELECTED DRAWING: Figure 2

Transmitters, receivers, systems and methods for compensating for polarization drift caused by a communications channel are provided. One or more polarization reference signal(s) or sets of polarization reference signals may be transmitted in combination with a polarized communications signal. The combination may be via wavelength or time multiplexing. Polarization measurements of the one or more polarization reference signals or sets of polarization reference signals and subsequent heterodyne detections thereof may be used for compensation of the polarization drift of the combined signals which are received. The polarization compensation may be for a State of Polarization (SOP) of a polarized communications signal such as any one polarization basis. The polarization compensation may be for complete polarization channel compensation such as for three different polarization basis which are mutually unbiased.

The application provides an optical quantum computing system, an optical quantum chip and an optical quantum computer, and relates to the technical field of quantum computing. The system comprises a plurality of optical waveguides, a plurality of spatial processing modules and a plurality of temporal processing modules are arranged on the plurality of optical waveguides, wherein: the spatial processing module is used for performing quantum state transformation on input optical quantum information to realize spatial parallel processing; the temporal processing module is used for performing time adjustment processing on the input optical quantum information to realize time multiplexing; the spatial processing modules and the temporal processing modules are alternately arranged between the spatial processing modules and the temporal processing modules, and the adjacent spatial processing modules and the temporal processing modules are connected through the plurality of optical waveguides. The embodiment of the application can realize the dual effective expansion of the scale and the depth of quantum computing.

The invention discloses an intelligent material transportation control system of a smart factory, and relates to the technical field of factory material transportation, the intelligent material transportation control system comprises an acquisition assembly, a processing assembly, an analysis assembly and a control assembly, the analysis assembly comprises a priority unit, a path adjustment unit and a comprehensive adjustment unit, and the control component performs task scheduling execution, path tracking and dynamic adjustment and speed real-time adjustment based on the data input by the analysis component. The priority unit evaluates the task priority in combination with dominant indexes and implicit quality influences, the path adjustment unit introduces a path space-time multiplexing coefficient to optimize multi-task path resource multiplexing, the speed adjustment unit is associated with a component fatigue accumulation dynamic adjustment speed, the three units cooperate to form a closed loop, intelligent decision making of the material transportation system is achieved, and the efficiency of the system is improved. Efficiency, production quality and equipment health are guaranteed, and requirements of smart factories are met.

The invention relates to a high speed imager circuit. Disclosed is a high dynamic range (HDR) imaging system in which the speed of digitization and storage of image data is improved by efficient signal management without additional resources. By managing data transfer processes in successive approximation register (SAR) analog-to-digital converter (ADC) circuits, using techniques such as control signal synchronization, multi-level memory, and time multiplexing, higher frame rates can be achieved without relying on increasing bandwidth with additional channels and without increasing power consumption or complexity of the imaging system.

The application discloses a kind of laser additive manufacturing in-situ solution and grading aging method, belong to metal additive manufacturing and heat treatment technical field.The application constructs main and vice laser time multiplexing dual optical path processing system, and three core procedures of laser additive manufacturing formation, in-situ solution, grading aging are integrated in the same equipment cavity and are continuously completed;Through the scanning of vice laser after layer forming, infrared temperature measurement, PID temperature control, the solution treatment of the formed region is completed synchronously, and then the two-stage in-situ heat treatment of homogenization spot pre-aging and Gaussian spot high-peak aging is completed in sequence.The application relieves the pain points of long offline heat treatment process flow, easy deformation of component, grain easy coarsening and significant performance anisotropy of traditional additive manufacturing, realizes the precise control of microstructure of metal component throughout the process and the synergistic improvement of high plasticity, greatly shortens the production cycle and reduces the manufacturing cost, and can be widely applied to the preparation of metal components in the fields of aerospace, automobile and rail transit.

This application discloses HDR enhancement using temporal multiplexing. Systems, devices, and methods may include a performance-enhanced computing system comprising: a sensor for measuring luminance values corresponding to light focused onto the sensor at multiple pixel locations; a memory comprising a set of instructions; and a processor. The processor executes the set of instructions, causing the system to: generate a multi-segment tone mapping curve; generate a set of tone mapping values corresponding to the multi-segment tone mapping curve for storing equally spaced input values between zero and one in a lookup table; and process the luminance values using the lookup table to apply the tone mapping curve to the luminance values of the pixels.

The application discloses a kind of real-time systems of cross water surface multi-channel visible light communication based on FPGA, using FPGA as real-time signal processing unit, while processing signal transmission and reception.Integrating low-density parity-check (LDPC) codes from 5G new radio, the system significantly improves its detection capability for dynamic W2A-OWC scenarios.The system also optimizes the use of FPGA resources through time multiplexing of the IP core of the LDPC decoder.The system not only supports single-color light transmission, but also supports multi-color light transmission, covering LEDs of different wavelengths to meet various service needs and adapt to complex environments.Using a light source array as the transmitting end and a detector array as the receiving end, a multi-channel transmission and reception module is realized, which can improve the rate of the communication system, promote the simultaneous transmission of multiple data streams and improve the overall throughput.

The application belongs to the technical field of three-dimensional display, and discloses a depth-of-field extension method and system for integral imaging. The method arranges a plurality of imaging devices with focal length-wavelength dependence on a micro display; in a first frame time, controls an element image area covered under each imaging device to display in a first color contrast relationship, and forms an image on a first depth plane; in a second frame time, controls the element image area covered under each imaging device to display in a second color contrast relationship, and forms an image on a second depth plane; and alternately displays the images on the two depth planes through time multiplexing. The depth of field can be extended, and high-quality imaging can be performed on two neutral depth planes.

A method for differentiating multiple Physical Downlink Shared Channel (PDSCH) transmission schemes for transmission of data for an over-the-top (OTT) service. In a non-limiting example, the PDSCH transmission schemes include a spatial multiplexing transmission scheme, a frequency multiplexing transmission scheme, a slot-based time multiplexing transmission scheme, and a mini-slot-based time multiplexing transmission scheme. In examples discussed herein, a User Equipment (UE) can be configured to differentiate the PDSCH transmission schemes based on information indicated in Downlink Control Information (DCI) for scheduling a PDSCH transmission, information signaled to the UE via a higher layer configuration, and / or capability signaling indicated from the UE to a network. By differentiating the PDSCH transmission schemes, the UE can efficiently receive a data transmission(s) from multiple Transmission / Reception Points (TRPs) to obtain user data from the OTT service.

Disclosed herein a method for transforming a single processor system into an effective multicore system with few modifications to the existing processor. The transformation is achieved by wrapping the processor with a CPU Manager module, which intercepts all CPU transactions, remaps addresses, manages interrupt lines, and controls the CPU clock using clock gating. The transformation to n effective multicore system brings about reduced area and power impacts compared to a full duplication of the whole system, while still reusing the existing program in a multicore environment.

The invention provides a reservoir calculation method based on rare earth doped nanocrystals. The reservoir calculation method comprises the following steps: acquiring an original digital image and converting the original digital image into a binary vector set; modulating the binary vector set into a pulse sequence set through time multiplexing coding; inputting the pulse sequence into a reservoir formed by three layers of core-shell-shell structure rare earth doped nanocrystals, and generating a corresponding luminescence response curve set through nonlinear dynamic interaction of the three layers of core-shell-shell structure rare earth doped nanocrystals; extracting features based on the curve set to form a reservoir state vector set; and finally, training and classifying the state vector set through a linear layer to obtain an image classification result. According to the reservoir calculation method based on the rare earth doped nanocrystals, through the synergistic effect of the physical characteristics of the rare earth doped nanocrystals and time multiplexing coding, a single reservoir replaces a traditional complex electronic network, coding, calculation and feature extraction are completed in an optical domain, the algorithm complexity and the training cost are remarkably reduced, and the calculation efficiency is improved. And efficient image classification is realized.

In order to improve the comparison speed of the comparator, the invention provides a high-speed comparator and application thereof, the high-speed comparator adopts a two-stage structure, the first stage is a pre-amplification stage, and the second stage is an amplification latch stage; a differential input signal is accessed to the pre-amplification stage, and the differential output end of the pre-amplification stage is connected with the differential input end of the amplification latch stage; two clock signals are used for carrying out time sequence control on the pre-amplification stage and the amplification latch stage, the two clock signals are a first clock signal CLKB and a second clock signal CLK respectively, and the phase of the first clock signal CLKB is a certain phase earlier than that of the second clock signal CLK. Each clock period is divided into a reset stage, a reset pre-amplification stage, an amplification stage and a pre-reset stage. Through clock regulation and control, pre-amplification of a reset stage and pre-reset of a comparison stage are added in a time sequence, multiplexing is formed in time, and the tense time sequence margin is relieved.

A system having a platform upon which several phased antenna arrays are mounted and which can communicate with satellites. The system includes a switch that can connect any of the phased array antennas to any of available modems. The system further includes a router that can connect any of the modems to any available computing devices. Based on parameters such as data rates, signal strength, and account information, one or more communication paths are selected for a computing device requesting to communicate with a satellite. Each communication path is established by operating the switch to connect a selected antenna to a selected modem, and operating the router to transfer data between the computing device and the selected modem.

The utility model discloses an isolation type high-frequency DC / DC converter, which comprises an upper half-bridge resonant converter, a lower half-bridge resonant converter, a first isolation transformer T1, a second isolation transformer T2 and a rectifying circuit, and is characterized in that the upper half-bridge resonant converter and the lower half-bridge resonant converter adopt a heterogeneous design; and only one of the first thyristor K1 and the second thyristor K2 is switched on at any moment t, so that the time division multiplexing control of the upper half-bridge resonant converter and the lower half-bridge resonant converter is realized, and the voltage gain range and the operation efficiency of the converter are improved.