453 results about "Beam switching" patented technology

A system and method for enabling coordinated beam switching scheduling and switching is provided. A method for controller operation includes selecting beams for transmission in a beam cycle pattern, transmitting the selected beams in the beam cycle pattern, scheduling a subset of the plurality of communications nodes based on received transmissions for the subset of communications nodes and channel information reports from the plurality of communications nodes, and transmitting the received transmissions to the scheduled subset of the plurality of communications nodes. The selecting is based on measurements of received signal power to noise made by a plurality of communications nodes, and the channel information reports are based on measurements of received signal power plus received interference power to noise made by each of the plurality of communications nodes.

The invention discloses a satellite-ground synchronization method for an on-satellite processing beam-hopping satellite communication system, and belongs to the technical field of satellite communication. By periodically inserting the beam hopping plan corresponding to the beam position into the downlink frame, the ground terminal can be effectively assisted to realize the fast access of the uplink in the beam hopping environment. In addition, in combination with the working principle of the phased-array antenna, the satellite-borne time transmission method oriented to phased-array antenna beam hopping application is provided, and the time reference consistency among multiple phased-array antennas and between each wave position receiving beam and each wave position transmitting beam is effectively ensured. The synchronous control time sequence of the phased-array antenna is provided, the beam switching serial data and the wave speed switching control pulse signal are separately transmitted, the beam switching serial data are sent in advance before the beam switch control pulse is sent, the protection time in the beam switching process is shortened, and the transmission efficiency of the beam hopping application is effectively improved.

A double-frequency dual-polarized antenna array belongs to the field of antennas for wireless communication, and solves problems of long feed line lengths and big antenna sizes in existing antenna arrays. The double-frequency dual-polarized antenna array is applicable to networks such as wireless local area networks and WiMax networks. The double-frequency dual-polarized antenna array comprises a horizontal substrate, N horizontally-polarized antennas and N vertical polarized antennas. The N horizontally-polarized antennas which are distributed in a symmetrical and uniform mode around the center of the circle of the horizontal substrate are printed on the horizontal substrate. The horizontally-polarized antennas are completely identical to each other in terms of shape and size. The N vertical polarized antennas are printed on rectangular substrates, and are respectively inserted into N grooves at the circumference of the horizontal substrate, so that each rectangular substrate is perpendicular to the horizontal substrate. A double-frequency dual-polarized structure is employed by the invention, so that the size of the antenna is shortened, and a Mimo technique and an intelligent antenna wave beam switching technique in wireless communication are effectively supported. One typical application is to support wave beam switching technique and a MIMO technique of a 2.4 GHz/5 GHz wireless local area network, and a system capacity and an anti-interference performance of the wireless local area network can be substantial raised.

Devices for and methods of synchronous beam refinement using a beam refinement reference signal (BRRS) are generally described. In one example embodiment, a UE receives BRRS information indicating switching of a Tx beam. The UE then uses this information to switch an associated Rx beam. In some embodiments, timing information is used to match the switching times. In some embodiments, DCI and CSI-RS operations are used to determine switching for the synchronous beam refinement.

Disclosed is a personal portable device that includes a microprojector. The microprojector creates an image for display. The image is sent to a “beam-switching element” that shunts the image toward a selected display screen (e.g., a display screen on the device or an off-device projection). The image is then displayed on the selected screen. By commanding the beam-switching element to change its configuration, different screens can be driven by the same microprojector. The combination of a single microprojector with multiple display screens gives the personal portable device the flexibility of multiple displays while preserving space within the device and, in some embodiments, lowering power consumption. In some embodiments, the microprojector simultaneously drives more than one display screen. The driven display screens may display the same or different images, and the images displayed may be of the same or of different resolutions.

In a CDMA data communication system capable of variable rate transmission, utilization of beam switching techniques decreases the average interference caused by transmissions of a base station to subscriber stations within a cell, and in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled amplitudes and phases, to form transmit signal corresponding to sector divisions. Data and reference signals are transmitted along sector division beams that alternate according to fixed time slots in order to increase system capacity and data rates by maximizing carrier-to-interference ratios (C/I) measured at subscriber stations.

The improved vehicle headlight has both leveling device and beam switching device which drives bulb displacing mechanism to displace light source bulb relative to reflector along its optical axis. In addition to driving the bulb displacing mechanism to displace the light source bulb relatively in a determined amount, actuator of the leveling device is driven to tilt the reflector through a determined angle, whereby a low beam is switched to a high beam and vice versa. Compared to the conventional system that performs beam switching by merely driving the bulb displacing mechanism, the vehicle headlight enables the same bulb displacing mechanism to displace the light source bulb through simple relative movements.

Speed of a vehicle is acquired from a speed detecting device, and then a beam switching threshold, according to the acquired speed, of an irradiation direction of a headlight is initially set. When the number of appearance (i.e. frequency of appearance) of a light source in a predetermined time detected by a light source detection means have become the beam switching threshold or more, the headlight is switched to a low beam. When a predetermined time (beam switching prohibition time Tp) has been passed after the irradiation direction of a headlight was switched to the low beam, the irradiation direction of the headlight is switched to a high beam.

The invention discloses a beam switching method, system and device based on a low earth orbit satellite and a storage medium, and the method is applied to a satellite terminal, and comprises the steps: obtaining the ephemeris information of the low earth orbit satellite; according to the ephemeris information and the geographic position information of the satellite terminal, obtaining a target beam to be switched and a target moment when switching occurs; switching to the target beam at a target moment; selecting the strongest adjacent beam with the strongest signal quality of the target beam;and switching to the strongest adjacent beam. According to the invention, switching parameters are flexibly configured according to the position information and ephemeris information of the satelliteterminal; the wave beam becomes a target wave beam more easily; and switching the beam to the target beam according to the switching moment, according to the invention, the switching accuracy is improved, the switching accuracy and the strongest beam reservation time are also improved by selecting and residing in the strongest adjacent beam under the target beam, the difficulty of link capture and tracking caused by Doppler frequency shift is reduced, the beam switching efficiency is improved, and the network searching efficiency of the satellite terminal is improved.

The invention provides a two-panel color management system for projection display applications, wherein color sequencing is accomplished using achromatic beam switching and static color separation. In a preferred embodiment, a liquid-crystal polarization switch alternates a polarization of an input light beam between two orthogonal states. A polarization beam splitter directs the beam comprising three primary color components alternately along a first and second paths, wherein first and second different secondary color filters are disposed for forming first and second secondary colored beams, each having two different primary color components. A dichroic color separator alternately receives the first and second secondary colored beams, separates their primary color components and directs them to first and second imager panels. A beam combiner combines the first polarized primary color beam from the first imager and the second polarized primary color beam from the second imager to form a projection beam.

The present specification provides a method for receiving data on the basis of quasi co-location (QCL) in a wireless communication system. More particularly, a data reception method performed by means of a terminal comprises the steps of: receiving transmission configuration indication (TCI) state information relating to at least one QCL indication with respect to a downlink reference signal (DL RS) from a base station by means of RRC signaling; receiving a physical downlink control channel (PDCCH), comprising downlink control information (DCI), on a first slot from the base station; and receiving a physical downlink shared channel (PDSCH) comprising data from the base station on the basis of one or more QCL indications. Therefore, the flexibility of the terminal during beam switching can be enhanced.

The invention discloses a mobile Ad Hoc network directional time-division access protocol based on neighbor beam alignment and tracking. According to the protocol, the time axis of a node is synchronously divided into a series of continuous network time frames, and each network time frame includes a neighbor discovery phase, a neighbor tracking phase, a data reservation phase and a data transmission phase. In the neighbor discovery phase, a node implements beam alignment and completes neighbor discovery through a neighbor discovery mechanism based on random beam switching and a three-way handshaking strategy. In the neighbor tracking phase, the node tracks a neighbor node by controlling frame interaction. In the data reservation phase, the node completes time slot division and allocation of the data transmission phase according to the transmission need. In the data transmission phase, the node completes directional data transmission. Meanwhile, a distribution function of disconnection time of the link between nodes is obtained through analysis by building a node motion model, and the optimal time frame length is set according to the function to achieve optimal network throughput performance. Simulation results in EXata prove the effectiveness of the protocol.

Systems and methods herein remedy thermal constraints experienced by wireless communication systems operating in the millimeter wave spectrum. User equipment (UE) having a plurality of antenna subarrays controlled by respective RFICs monitor temperature gradients of respective sectors of the UE. Upon the thermal gradient of a sector reaching a temperature threshold, the UE performs thermal management steps to prevent hardware of a respective sector from damage due to overshoot.

The invention relates to a driving anti-collision radar device for an automobile. The driving anti-collision radar device comprises an antenna array, a Butler matrix multi-beam feedback distribution/synthesizer, a millimeter wave receiving and transmitting assembly, a waveform generator, an intermediate-frequency amplification circuit, a signal processing circuit, a display and alarm module and a power supply module. The waveform generator generates modulation voltage, outputs the modulation voltage to the millimeter wave receiving and transmitting assembly, generates a transmitting signal, and outputs the transmitting signal to the Butler matrix multi-beam feedback distribution/synthesizer for beam forming; and the transmitting signal is radiated by the antenna array, reflection echoes are transmitted to the Butler matrix multi-beam feedback distribution/synthesizer by the antenna array for signal synthesis, an intermediate-frequency beat signal is output by down conversion, the intermediate-frequency amplification circuit amplifies the intermediate-frequency beat signal, and the intermediate-frequency beat signal is input to the signal processing circuit for sampling, analyzing, processing, displaying and prewarning. The device is high in beam switching speed, low in cost, high in reliability, large in search area, and strong in anti-jamming performance, and can be widely applied to the fields of various complex industrial fields and driving safety of automobiles.

A workpiece processing system employs a common modular imaged optics assembly and an optional variable beam expander for optically processing multiple laser beams. In one embodiment, a laser and a fixed beam expander cooperate to produce a laser beam that propagates through a beam switching device to produce multiple laser beams that propagate along separate propagation path portions and subsequently merge into a common path portion through an imaged optics assembly and optional variable expander. The beam expander sets the shape of the laser beams in the form of a Gaussian spatial distribution of light energy. The imaged optics assembly shapes the Gaussian spatial distribution of the laser beams to form output beams of uniform spatial distribution. In an alternative embodiment, the beam switching device is removed and the laser beams propagate from separate laser sources associated with separate optional beam expanders.

The invention discloses a terminal independent GEO satellite mobile communication system multi-beam switching method, which mainly relates to a cross-beam switching technology in the satellite mobilecommunication field. A dual channel device is arranged in the mobile terminal; through reasonable software control, the dual-channel devices can reside in different beams in the beam overlapping area,and the communication data can be seamlessly switched between the two channels when the beams are crossed, thus realizing the continuity of communication and the integrity of data transmission in theprocess of high-speed mobile users frequently crossing the beams. A terminal dual channel is adopted, the design of autonomous handoff transmission channel, compared with the existing cross-beam switching method, it has the characteristics of no system switching control, flexible and autonomous user use, uninterrupted communication and user non-inductive beam switching, and is especially suitablefor the GEO multi-beam satellite system where the mobile user can move freely and keep the communication continuity.