320 results about "Beam control" patented technology

The invention provides a method for assisting a movable antenna to realize secure communication by STAR-RIS, and relates to the technical field of wireless communication. According to the method, the safety and the rate of the system are maximized by jointly optimizing the beam forming of the base station, the position of the movable antenna and the STAR-RIS coefficient matrix. The method specifically comprises the following steps: constructing a downlink MIMO system and establishing a joint optimization problem; decomposing the joint optimization problem into three sub-problems by adopting an alternate optimization framework; respectively utilizing a particle swarm optimization algorithm and a weighted minimum mean square error method to be combined with a Majoritization-Minimalization algorithm to solve each sub-problem, and respectively utilizing the particle swarm optimization algorithm and the weighted minimum mean square error method to be combined with the Majoritization-Minimalization algorithm to solve each sub-problem; and alternately executing related steps until system security and rate convergence to obtain a solution of the joint optimization problem. By the adoption of the method, the safety communication performance of the system is remarkably improved, full-space coverage and precise beam regulation are achieved, the algorithm convergence is high, the solving efficiency is high, and the method is suitable for a downlink system with multiple users and multiple eavesdropping nodes.

The invention discloses a centralized phased array beam control method and system based on an FPGA, and relates to the technical field of phased array beam control, and the method comprises the steps: carrying out the real-time iterative operation through an incremental adaptive correction kernel in a centralized control FPGA, and obtaining an amplitude-phase correction increment and a corresponding target effective frame number; performing increment differential coding on the amplitude-phase correction increment and the corresponding target effective frame number in a centralized control FPGA (Field Programmable Gate Array) to generate an increment differential beam control message; sending the increment difference beam control message to an array element FPGA (Field Programmable Gate Array) at the front end of an array, executing frame-level atom switching according to a target effective frame number, and fusing the amplitude-phase correction increment and a locally stored old beam control weight in the switching process to obtain a final array element beam control weight; generating a real-time beam control directional diagram based on the final array element beam control weight; the stability and convergence precision of beam control are improved, and the bandwidth requirement of a control link is reduced.

The invention discloses a high-flux electron beam quality cooperative control system and method, belongs to the technical field of electron beam control, and aims to solve the problems that the beam intensity and quality are difficult to consider, the subsystem collaboration is poor and the stability is insufficient. The cooperative control module is in communication connection with the sensing module and is used for receiving the state parameters, analyzing the state parameters based on a preset multi-target optimization algorithm and generating a cooperative control instruction, and the execution module is in communication connection with the cooperative control module and is used for receiving the cooperative control instruction and executing the cooperative control instruction according to the cooperative control instruction. Cooperative control of beam intensity and quality is realized. Through a multi-objective optimization algorithm, the limitation of traditional single parameter control is broken through, the beam intensity is larger than or equal to 100 mA, the emittance is smaller than or equal to 5 pi mm mrad and the energy dispersion is smaller than or equal to 0.5% can be achieved at the same time, and the technical problem that the beam intensity and the emittance are difficult to consider is solved.

The invention discloses cluster beam equipment, which relates to the technical field of cluster beams and comprises a working platform, and a cluster generation mechanism, a beam regulation and control mechanism, a beam screening mechanism and a deposition mechanism which are connected in sequence. The working platform is provided with a sliding rail and a sliding structure, so that all mechanisms can be flexibly positioned, disassembled and assembled. The cluster generation mechanism comprises an angle-adjustable condensation cavity, an adjustable nozzle and an ion funnel, so that accurate generation of clusters is realized; a conical sputter of the beam regulation and control mechanism separates non-scattering beams; the beam screening mechanism adapts to different quality screening requirements through an ion optical assembly and a multi-layer conductive polar plate quality selector; the deposition mechanism is provided with a full-degree-of-freedom manipulator, a magnetic driving rod and a telescopic mechanism, substrate installation and adjustment are conveniently completed, and the stability of the vacuum environment is guaranteed. The equipment solves the problems that existing equipment is inconvenient to adjust, complex to operate, insufficient in stability and the like, the assembling and debugging efficiency and adaptability are improved, and the equipment is suitable for material preparation in multiple fields.

A beam control method for the intelligent surface device includes obtaining, by a network side device, first channel information of an active unit of the intelligent surface device, where the first channel information is channel information between the network side device and the active unit; obtaining second channel information of the active unit, where the second channel information is channel information between a terminal and the active unit; and determining control information of a unit array of the intelligent surface device based on the first channel information and the second channel information, where the unit array includes the active unit and a passive unit of the intelligent surface device.

The invention, which relates to the technical field of audio experience, discloses an immersive audio experience-oriented sound sound field orientation system comprising a position sensing module, a sound field modeling module, a characteristic sound wave generation module, an array control module and a space feedback adjustment module. The position and orientation information of a target user in a three-dimensional space is obtained in real time through a non-contact sensor, a real-time acoustic propagation model containing reflection surface distribution and material characteristics is constructed, a multi-channel acoustic signal is generated based on the model, a loudspeaker array is driven to produce sound through a beam control parameter set, and the sound transmission effect is achieved. According to the invention, the spatial focusing of the sound beam in the target direction is realized, the sound production delay and phase difference of each loudspeaker unit are dynamically adjusted based on the direction deviation information of the received sound pressure, and a closed-loop control path is formed. The method is suitable for various scenes such as virtual reality, intelligent cinemas and voice interaction.

The invention discloses a beam guidance optimization method based on position prediction in unmanned aerial vehicle communication, and relates to the technical field of unmanned aerial vehicle communication optimization, and the method comprises the steps: obtaining the flight path data of an unmanned aerial vehicle, carrying out the adaptive segmentation according to the flight path data, and constructing a state evolution model for each flight path; performing short-term prediction and medium-term residual error calibration prediction according to the state evolution model, and constructing a prediction correction term to generate a prediction point set; mapping the prediction point set to a direction coordinate system of a ground communication array to construct an angle evolution tensor, and screening to obtain a candidate beam direction set; and screening a standby beam direction with the maximum path coverage redundancy from the candidate beam direction set. According to the method, a beam guiding optimization mechanism with state identification, adaptive prediction, space tolerance, historical correction and multi-path dynamic regulation and control capabilities can be realized, and the beam control precision, the failure recovery capability and the communication link stability in a complex airspace motion state during communication of the unmanned aerial vehicle are remarkably improved.

The invention discloses a harmonic generation and beam control method and system based on an amplitude-phase regulation metasurface array. The method comprises the following steps of: constructing an amplitude-phase regulation and control metasurface array by adopting a digital control multi-channel radio frequency chip; based on a Fourier series and far field superposition model, calculating a time-varying amplitude phase sequence of harmonic waves and a phase gradient of beam pointing; the sequence is converted into a control signal through an FPGA, and each channel is modulated in real time; after an array receives a dot frequency signal, a target harmonic wave beam with a preset characteristic is radiated to a specified direction through periodic amplitude-phase modulation and space phase gradient processing. The system comprises an amplitude-phase regulation metasurface array construction module, a harmonic wave and beam control model construction module, a digital control signal generation loading module and a target harmonic wave generation radiation module, and is used for realizing the harmonic wave generation and beam control method. Accurate generation of any order of harmonic waves and flexible deflection of wave beams are achieved, the system integration degree, the regulation and control precision and the real-time performance are improved, and the application field is wide.

The invention relates to the technical field of radiotherapy, and discloses a multi-modal image fusion guided chest tumor adaptive radiotherapy system. The system comprises an asynchronous bimodal sensing module, a spectrum preprocessing module, a parameter inversion module, a boundary construction module and a biomechanical calculation module. According to the method, the feedback voxel-level velocity field is utilized to execute Lagrange reverse warping on the high-energy projection with physical time delay, and motion artifacts are eliminated; and dynamically updating the Young modulus of the lung tissue mechanical model based on the inverted real-time electron density, and solving a full-field three-dimensional displacement field in combination with double boundary conditions of body surface flexibility and internal skeleton rigidity so as to reconstruct a tumor target region and generate a beam control instruction. According to the method, through closed-loop interaction of image physics and biomechanics, the problems of dual-energy imaging motion artifact interference and insufficient lung tissue fixed parameter modeling precision are solved, and accurate self-adaptive tracking of a tumor target region is realized.

This invention relates to the field of fast reflector technology, specifically to a two-dimensional large-angle fast reflector device based on a PCB eddy current sensor. The device includes: a flexible support assembly that enables the reflector assembly to deflect in a two-dimensional direction, and which, after angular displacement, returns to its original position through elastic deformation; and an eddy current sensor probe comprising multi-layer coils printed on an eddy current circuit board, with each pair of probes symmetrically arranged on the board. This invention, through the flexible support assembly and a moving-magnet drive structure, enables the reflector assembly to achieve large-angle deflection in two orthogonal directions. Compared to traditional micro-angle deflection structures, the maximum deflection angle is significantly increased, covering a wider field of view, making it suitable for applications such as large-field-of-view scanning, rapid target acquisition, and wide-angle beam control.

This invention discloses a high-performance communication transmission method based on 5G distributed antenna cooperative networking, specifically relating to the field of distributed antenna communication technology. It addresses the problems of existing distributed antenna systems relying on explicit control signaling for node scheduling, power allocation, and beam control, resulting in high signaling overhead, high scheduling delay, and low cooperative efficiency in high-speed mobile and complex channel environments. By mapping transmit power levels, energy storage unit voltage states, and beam pointing information to the amplitude, phase, and subcarrier distribution characteristics of the pilot sequence, multi-dimensional control information is implicitly carried at the physical layer. User equipment then analyzes the superimposed pilots to complete the selection of the dominant antenna node and beam pointing correction feedback. This allows each antenna node to perform cooperative transmission and adaptive adjustment based on the feedback results, thereby achieving efficient and stable distributed cooperative communication without the need for additional control signaling.

To provide a radio communication system capable of suppressing interference between a reception signal received by a base station from a ground terminal and a reception signal received by the base station from an aerial terminal in a three dimensional space cell configuration in which a ground cell and an aerial cell share the same frequency band.SOLUTION: A base station included in a wireless communication system includes an antenna, a wireless communication unit that forms a ground cell and an aerial cell that use the same frequency band and performs wireless communication with a ground terminal and an aerial terminal via the antenna, a ground beam control unit that performs beamforming for directing a directional beam to the ground terminal, an aerial beam control unit that performs beamforming for directing a directional beam to the aerial terminal, and an interference suppression unit that superimposes an interference suppression weight for suppressing an interference signal from the ground terminal on a reception signal received from the ground terminal via the antenna and superimposes an interference suppression weight for suppressing an interference signal from the ground terminal on a reception signal received from the aerial terminal via the antenna.SELECTED DRAWING: Figure 6

A vertical-cavity surface-emitting laser (VCSEL) includes a substrate, a first reflector structure formed above a first surface of the substrate, and a second reflector structure formed above the first surface of the substrate. Furthermore, a multi-junction active region is formed above the first surface of the substrate between the first reflector structure and the second reflector structure. The multi-junction active region includes multiple quantum well (MQW) regions and multiple oxide layers, each of which includes a peripheral region and an aperture region. The peripheral region surrounds the aperture region. A stress field of at least 2 gigapascals is achieved at the edge between the peripheral region and the aperture region.

This application proposes a sliding-window type electrically controlled beam scanning conical antenna array, comprising a conical antenna support, antenna elements, and a beam control network. The conical antenna support consists of 13 trapezoidal surfaces with an elevation angle of 5°. There are 14 antenna elements in total. Two antenna elements located on the same trapezoidal surface are fed to antenna elements on their adjacent trapezoidal surfaces via unequal phase feeding to form two high-gain antennas. These two high-gain antennas combine to form a high-gain beam. Simultaneously, the high-gain antennas combine with their adjacent antenna elements to form a directional beam. The remaining adjacent antenna elements can also combine to form directional beams. The conical antenna array has 12 directional beams, with a pointing angle difference of 30° between adjacent beams. The beam control network can achieve rapid switching between the 12 beams, realizing sliding-window type electrically controlled beam scanning and forming 360° azimuth coverage. This sliding-window type electrically controlled beam scanning conical antenna array significantly reduces costs while possessing sliding-window type electrically controlled beam scanning capabilities.

An apparatus is provided that includes at least receiver circuitry, a processor, and memory. The apparatus also includes a plurality of directional antennas configured to simultaneously receive different downlink signals for each polarization. The apparatus further includes control circuitry for controlling processes for beam sweeping, beam refinement, and selecting a beam pair that maximizes signal strength while minimizing inter-layer-group interference. A portable electronic device and a stationary electronic device that include the apparatus are also provided. A method carried out by means, such as the apparatus, is also provided. A computer program product, such as a non-transitory computer readable medium, for causing an apparatus to carry out such a method is also provided.

The present invention relates to an optical scanning antenna (10) comprising: - a light source (12) generating a beam, - a dividing unit (14) that divides the generated beam into N sub-beams, - a control unit (16) for controlling the relative phase of the N sub-beams, - an integrated photonic circuit (11) comprising a set of extractors (34), the extractors (34) being arranged in a first two-dimensional periodic array, each extractor (34) being able to extract one respective sub-beam from a plane of the integrated photonic circuit (11), - an array of lenses (20) arranged in a second two-dimensional periodic array, the first array and second array having the same arrangement, and - a movement unit (22) allowing the first array and the second array to be moved with respect to each other.

A beam control device capable of performing an automatic beam selecting mechanism, is used to control a first number of platform-provided beams generated by an antenna array. The platform-provided beams are used to provide communication service to several terminal devices. The beam control device includes a beam classifying unit and a beam type converting unit. The beam classifying unit is used to select a second number of patrol beams from the platform-provided beams, confirm a service status of each patrol beam, and classify the patrol beams into serving beams and non-serving patrol beams according to the service status. The beam type converting unit is used to select at least one of a third number of candidate beams, and convert the selected candidate beam into the type of the patrol beams to replace at least one of the non-serving patrol beams.

The invention discloses a no-cable communication system based on a photon integrated phased array, and the system comprises a plurality of symmetrical double-end receiving and transmitting communication systems, a modulation and demodulation module in a local end emits a modulation optical signal, and the modulation optical signal passes through a light transmitting antenna of the local end for multi-beam transmission; the optical receiving antenna at the opposite end receives an optical signal transmitted by the local end; the corresponding optical fiber beam splitter performs energy splitting on the received optical signal, one part of light is used for bidirectional closed-loop tracking control, and the rest of light enters the corresponding modulation and demodulation module; the modulation-demodulation module at the opposite end emits a modulated optical signal, and the modulated optical signal passes through the optical emission antenna at the opposite end to perform multi-beam emission; and the optical receiving antenna of the home terminal receives the optical signal transmitted by the opposite terminal so as to establish a bidirectional full-duplex communication link. According to the invention, rapid and agile beam control and simultaneous multi-beam transceiving are realized, and the application requirements of near-field cableless multi-link parallel communication are met.

The invention provides a rocket phased-array antenna beam control method and device, and relates to the technical field of spaceflight measurement and control, and the method comprises the steps: obtaining the flight pose data of a rocket at the current moment and the working state data of a phased-array antenna at the current moment; determining a beam pointing target value of the phased-array antenna at the current moment based on the flight pose data at the current moment and the spatial position data of the relay satellite; determining a radiation power target value of the phased-array antenna at the current moment based on the flight pose data at the current moment; and generating a beam control instruction of the phased-array antenna based on the beam pointing target value and the radiation power target value at the current moment and the working state data at the current moment, and driving the phased-array antenna to complete beam pointing. According to the method and the device provided by the invention, the rapid, accurate and reliable control of the antenna beam in a complex dynamic environment is realized; the method improves the completion quality and efficiency of a spaceflight measurement and control task, and guarantees the measurement and control demands of the key stage of the spaceflight task.

The present disclosure provides a holographic antenna, a beam control method thereof, a storage medium and an electronic device, and belongs to the technical field of antennas. The present disclosure can solve the problem that the existing antenna structure is complex and the polarization direction is not variable. The holographic antenna comprises a dielectric substrate, a radiation layer and a plurality of switch units. The radiation layer is provided with a plurality of slit openings. The switch units are arranged correspondingly to the slit openings. The holographic antenna further comprises an acquisition unit configured to acquire a target wave and a polarity of the target wave; a construction unit configured to construct a reference wave based on the polarity of the target wave; a calculation unit configured to calculate an interference wave based on the reference wave and the target wave; a sampling unit configured to obtain an excitation sampling value of each slit opening; and a control unit configured to control the switch units to control the switching state of the slit openings. The present disclosure can realize dynamic reconfiguration of different polarizations by using the holographic principle combined with a slot antenna.

The application discloses a library high-density book management system and a management method thereof, and belongs to the field of library management. The library high-density book management system comprises a multi-mode SAW sensing label, a reader-writer head terminal, and a regional controller. The reader-writer head terminal is arranged at the top center of each bookshelf unit at an interval of 3-5 meters. The reader-writer head terminal is composed of a small linear array of 4-8 microstrip patch antennas, generates high-frequency pulses, and receives reflected signals, and is used for accurately measuring echo arrival time and phase. The regional controller is arranged in each reading room or area, and is responsible for managing all reader-writer head terminals in the area. The regional controller is a controller with a built-in FPGA, and realizes real-time beam control and signal processing. The application realizes passive sensing of the physical state of books, and realizes high-precision positioning through a beam arrival time difference.

The invention discloses a front beam control method based on electromagnetic shielding performance monitoring, and the method comprises the steps: arranging an electromagnetic interference monitoring array in an Ek + combined front beam structure, the electromagnetic interference monitoring array is composed of a plurality of micro sensors, including a micro electromagnetic field sensor and a contact resistance sensor, and the micro sensors are arranged at the joints and joints of the front beam structure; a signal of an electromagnetic interference monitoring array is collected in real time through a front beam control unit, and the signal is composed of electromagnetic leakage signal strength collected by a miniature electromagnetic field sensor and / or conductive continuity data collected by a contact resistance sensor; the front beam control unit compares the signal with a preset threshold value and judges whether electromagnetic leakage abnormity exists or not; when it is detected that electromagnetic leakage is abnormal, a grounding calibration feedback mechanism is triggered, and the grounding state of the seam of the front beam is physically adjusted through a grounding calibration actuator; and the front beam control unit continuously monitors the signal and adjusts the grounding calibration actuator through feedback control until the signal is recovered to be below the preset threshold value.

A spectral domain optical coherence tomography (OCT) system utilizes an electrowetting prism having four isolated electrodes and configured to deflect a light beam according to an actuating control signal applied to the electrodes. The control signal causes the light beam to laterally scan over a sample. The light beam is produced by a broad bandwidth laser and light from the sample and a reference path is provided to a spectrometer for analysis. The light source may be an all-normal-dispersion fiber laser seeding a gain-managed nonlinear fiber amplifier. The electrowetting prism is capable of scanning up to ±6°. The system is low power and operates at kHz speed.

The invention discloses a unilateral excitation independent dual-polarization beam-forming transmission and reflection integrated array antenna which comprises a high-isolation dual-polarization feed source and a metasurface. The feed source adopts orthogonal I-type slot coupling and double-layer orthogonal feed, and the port isolation is superior to 50dB. According to the dual-polarization feed antenna, the radiation patch is coupled and excited through the orthogonal I-type slot on the grounding plate, and the SMA side feed is coupled through the orthogonal feeder lines above and below the double-layer substrate. The metasurface reflection subsystem is an X-direction bow-tie-shaped multi-layer stack, and the transmission subsystem is a Y-direction oval multi-layer stack. The antenna works in an X wave band, and the frequency bands of the two ports are 9.98 GHz to 10.65 GHz and 9.67 GHz to 10.58 GHz. The excitation reflection gain of the port 1 is 20.2 dBi, and the excitation transmission gain of the port 2 is 20.3 dBi. The antenna has the characteristics of high gain, dual polarization independence, reconfigurable beams in different directions, high isolation and flexible beam regulation and control, and is suitable for systems of multi-beam communication, directional networking and the like.

The invention relates to the field of light beam control, in particular to a light beam collimation control method and system of a VCSEL light source. The method comprises the following steps: detecting an initial emergent light beam of a VCSEL light source, carrying out periodic tracking sampling, and determining a light beam structure response characteristic; carrying out region offset calculation one by one according to light beam structure response characteristics to obtain offset compensation parameters of different partitions; adjusting the driving current of the light emitting unit based on the offset compensation parameter to obtain a current adjustment parameter; applying the current adjustment parameter to a VCSEL array in real time, and performing collimation stability evaluation to obtain a stability coefficient; and performing evaluation based on the stability coefficient, and when it is judged that the VCSEL light beam enters a stable collimation state, recording the current adjustment parameter as a collimation adjustment parameter, and entering a low-disturbance maintenance mode. According to the invention, the driving current parameters of the light source are precisely regulated and controlled, so that the light beam collimation precision, stability and anti-disturbance capability are improved.

A beam control method is provided in the invention. The beam control method may be applied to a beam control apparatus configured in a car. The beam control method may include the following steps. The beam control apparatus obtains an image. An advanced driver assistance system (ADAS) of the beam control apparatus may determine whether at least one pedestrian is detected in front of the car according to the image. When the ADAS detects at least one pedestrian in front of the car, a beam control device may obtain pedestrian information of the at least one pedestrian and speed information of the car, and determine whether to enable a polite mode according to the pedestrian information and the speed information. When the beam control device enables the polite mode, the beam control device may control the display pattern of the beam device according to the pedestrian information.

This invention discloses a user-end beam control system for a KuKa dual-band multi-beam antenna, comprising: an FPGA module for receiving instruction information from a payload integrated electronics system, generating various control signals and sending them to the KuKa dual-band multi-beam antenna, and also for receiving telemetry information from the KuKa dual-band multi-beam antenna, integrating it into a telemetry data packet and sending it to the payload integrated electronics system; a clock management module for receiving a reference clock signal from an external frequency source and generating the operating clock required by the FPGA module; an interface module for providing a serial communication interface and serial driver, an LVDS control interface and driver, and a debugging interface; and a debugging module for debugging the software running within the FPGA chip. This invention can quickly and independently adjust the beam pointing of the Ku and Ka bands of the KuKa dual-band multi-beam antenna and acquire telemetry data from the KuKa dual-band multi-beam antenna in real time.

An eyewear device includes a lightguide having a world-side surface and an eye-side surface, a display oriented to emit light toward the lightguide, and a beam steering element that includes a first polarization grating positioned along an optical path between the display. The first polarization grating diffracts light emitted by the display into orders having different polarizations and the orders are selectively conveyed into different eyeboxes. The eyewear device also includes a frame that supports the lightguide, the display, and the first polarization grating. In some cases, the different polarizations include a right circular polarization or a left circular polarization and the beam steering element includes a polarization dependent filter that filters right circularly polarized light in a first state and left circularly polarized light in a second state.

The invention discloses a rail transit 5G Massive MIMO conformal antenna based on a holographic metasurface and a beam regulation and control method of the rail transit 5G Massive MIMO conformal antenna, and belongs to the technical field of wireless communication. The conformal antenna comprises a flexible dielectric substrate, a holographic metasurface unit array, an impedance matching layer, an active feed network and an intelligent control system. The beam regulation and control method comprises a hologram calculation step, a dynamic beam forming step and a multi-mode vortex beam generation step. Conformal deployment of the antenna, the tunnel inner wall, a train body and other complex curved surfaces is achieved through the holographic metasurface technology, the intelligent beam regulation and control algorithm is utilized to adapt to the rail transit fast time-varying channel environment, the problems that a traditional antenna is limited in form and too high in energy consumption are effectively solved, and meanwhile high-capacity, low-power-consumption and high-safety wireless communication is achieved.

Liquid crystal (LC) beam control devices utilize dispersion-shaping (DS) half-wave plates (HWPs) with specific physical properties to allow broadened beams to maintain significantly better color cohesion. This paper describes the advantages of using HWPs with appropriate thickness and birefringence, which makes them inefficient in the blue wavelength spectrum, thus reducing blue photon loss at the center of the broadened beam. This paper also describes combinations of vertically aligned LC cells and DS HWP structures for reducing color separation, accelerating relaxation time, and reducing ground-state scattering.