344 results about "Signal beam" patented technology

An electronic device may be mounted to a main body of a removable case. The case includes a cover that rotates between open and closed positions. The device may convey wireless data and / or a control signal with the removable case over radio-frequency connectors, near-field communications (NFC) coils, connector electrodes, and / or wired data connectors. The removable case may relay the wireless data between the electronic device and a communications satellite in space. The case may include a phased antenna array in the cover. In the open position, the cover may point the phased antenna array towards the sky. The removable case may include beamforming circuitry in the cover and coupled to the phased antenna array. The control signal may control the beamforming circuitry to produce, using the phased antenna array, a signal beam oriented towards the communications satellite.

The embodiment of the invention provides an optical detection device which comprises an imaging assembly and a photoelectric detection device, and the imaging assembly is used for forming an image on an image plane of a to-be-detected area of a wafer. And the photoelectric detection device is used for receiving images and is arranged at the image plane. The photoelectric detection device comprises a light beam separation assembly and a sensor assembly, the light beam separation assembly is used for dividing a continuous first light signal in an image into multiple beams of second light signals, and the light beam separation assembly comprises a microlens array. The sensor assembly is used for receiving multiple beams of second optical signals, and each pixel unit of each sensor in the sensor assembly is used for receiving one beam of second optical signal in the multiple beams of second optical signals. The sensor assembly comprises a single-pixel sensor, and the single-pixel sensor corresponds to one micro lens in the micro lens array; and / or, the sensor assembly comprises a multi-pixel sensor, the multi-pixel sensor corresponds to a plurality of microlenses in the microlens array, and spatial segmentation is beneficial to improving the signal-to-noise ratio.

Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, an example of a process includes transmitting, to a reconfigurable intelligent surface (RIS), a plurality of reference signal beams in a plurality of directions. The process may further include receiving, from the RIS, a plurality of reflection reference signal beams in the plurality of directions based on a plurality of backtracking reflection coefficients. The process may include measuring a signal strength of each reflection reference signal beam in each direction of the plurality of directions for each backtracking reflection coefficient of the plurality of backtracking reflection coefficients. The process may further include determining, basing on measuring the signal strength, a selected beam direction from the plurality of directions and a selected backtracking reflection coefficient of the plurality of backtracking reflection coefficients.

The invention discloses a low-earth-orbit satellite beam scheduling and user grouping method, device and equipment and a storage medium, and relates to the technical field of communication, and the method comprises the steps: carrying out the stage processing of beam resources of a low-earth-orbit satellite, and obtaining a first-stage beam, a second-stage beam and a third-stage beam; scanning an existing signaling beam position based on the first-stage beam, and determining a target signaling beam position of the user equipment; random access is carried out on the target signaling beam position based on a second-level beam, and the position of user equipment corresponding to the target signaling beam position is determined; clustering the position of the user equipment based on the third-level beam, and determining a user clustering set and a clustering centroid of the user clustering set; and taking the clustering centroid of the user clustering set as a center coverage position of a third-level beam to complete beam hopping scheduling. Through the above mode, multi-beam multi-user scheduling is realized, the user access waiting time is reduced, the resource utilization efficiency is ensured, the interference is reduced, and the throughput rate is improved.

Embodiments include methods, performed by a network node, for providing positioning assistance data to one or more user equipment (UEs) in a wireless network. Such methods include determining an angular resolution of angular positioning assistance data for each particular beam of a plurality of beams transmitted by one or more transmission reception points (TRPs) in the wireless network. Such methods also include transmitting, to one or more UEs, the angular positioning assistance data for the plurality of beams. For each particular beam, the angular positioning assistance data includes a first part having a first resolution and, when the determined angular resolution for the particular beam is greater than the first resolution, a second part having a second resolution that is greater than the first resolution. Other embodiments include complementary methods performed by a UE, as well as network nodes and UEs configured to perform such methods.

A method (1900) by a first radio node (205, 210) includes receiving (1902), from a second radio node (205, 210), beamforming information comprising at least one parameter related to at least one spatial property of at least one reference signal beam. In particular, the beamforming information related to the at least one spatial property may include at least one of a beam configuration, a spatial correlation between two or more reference signal beams, and / or a capability related to beamforming at the second radio node.

The invention provides a device for generating multiple beams of time sequence light based on a single-circle light spring, and relates to the technical field of ultrafast imaging, and the device comprises a leading edge tilt pulse generation system which is used for generating a long elliptical leading edge tilt pulse; the light spring generation system comprises a polarizer, a first wave plate, a diaphragm, a geometric conversion device, a convex lens, a phase compensator and a second wave plate which are sequentially arranged along the pulse propagation direction, and generates a single circle of light spring pulse based on the long elliptical leading edge tilt pulse output by the leading edge tilt pulse generation system; and the time sequence light beam generation system is used for dividing the single-circle light spring pulse into a plurality of beams of time sequence light through a circular porous diaphragm and a lens group. According to the invention, multiple beams of time sequence pulses can be generated as a coherent shutter to interfere with a signal light beam carrying ultrafast event information, multiple beams of time sequence light can be efficiently generated, multi-beam interference noise is optimized, and efficient image separation of ultrafast imaging is realized.

One example includes a quantum lidar system. The system includes a beam generator configured to generate a signal beam and an idler beam and a beam combiner configured to generate a combined optical beam comprising the signal beam and the idler beam. The system also includes a lidar transmitter configured to transmit the combined optical beam to a target and a lidar receiver configured to receive the combined optical beam and a reflected beam of the combined optical beam reflected from the target to generate lidar data associated with the target.

A LiDAR method and system and an autonomous vehicle are provided. The method includes: generating a frequency-sweeping beam which is split into a signal beam and a local-oscillation light beam; transmitting the signal beam; receiving a reflected light beam; performing time delay or frequency-shift on at least one of the signal beam, the reflected light beam or the local-oscillation light beam, and / or performing in-phase quadrature coherent demodulation on the local-oscillation light beam and the reflected light beam, so as to obtain scalar values of beat frequencies between the local-oscillation light beam and the reflected light beam; determining a speed of an object and / or a distance between the object and the LiDAR system.

The invention provides a laser measurement method and a laser radar, and relates to the field of laser radar measurement. The method comprises the following steps: generating a frequency sweeping light beam; splitting the sweep-frequency light beam into a signal light beam and a local oscillator light beam; emitting the signal light beam; receiving a reflected light beam generated by reflection of the signal light beam encountering an object; carrying out time delay or frequency shift on at least one of the signal light beam, the reflected light beam and the local oscillation light beam, and / or carrying out in-phase orthogonal coherent demodulation on the local oscillation light beam and the reflected light beam so as to obtain scalar values of beat frequency of a frequency raising stage and beat frequency of a frequency lowering stage; and detecting a beat frequency of an up-conversion phase and a beat frequency of a down-conversion phase between the local oscillator beam and the reflected beam to determine the speed of the object and / or the distance between the object and the lidar. According to the scheme, a measurement blind area can be avoided, and the measurement precision is improved.

The invention provides a gas sensing system and method based on MZI-micro-ring resonant cavity enhancement. The gas sensing system comprises a laser, a beam splitter, a first coupling module, a second coupling module, an optical switch and a coherent detection module, a light source emitted by the laser passes through the beam splitter to obtain three identical light beams, including a reference light beam, a first signal light beam and a second signal light beam; wherein the first signal light beam and the second signal light beam respectively pass through the first coupling module and the second coupling module, are subjected to channel selection of the optical switch, and then are subjected to interference measurement with the reference light beam through the coherent detection module.

The invention provides a multi-signal beam-expanding hybrid transmission cabin-penetrating connector, and belongs to the technical field of data transmission, the multi-signal beam-expanding hybrid transmission cabin-penetrating connector comprises a disc shell, two compression nuts, a partition plate nut and an insulator assembly, the two compression nuts are fixed on the periphery of the disc shell in parallel, a fuse is arranged between the two compression nuts, and the partition plate nut is fixed on the periphery of the disc shell. The insulator assembly is arranged in the disc shell, the partition plate nut is located on the periphery of the insulator assembly, the insulator assembly is fixed through the combined action of a key groove in the right side in the disc shell and the partition plate nut on the left side, and a cavity of the disc shell is filled with glue for reinforcement. The insulator assembly comprises a plurality of contacts of different specifications, the insulator assembly is used for transmitting radio frequency coaxial signals, optical fiber signals and power signals, and the plurality of contacts of different specifications are arranged to be of two-end butt joint structures. According to the scheme, the integration level and the signal transmission efficiency of the cabin-penetrating connector are improved, and stable mixed transmission of various signals in the same connector is achieved.

A module has a transmitter (Tx) antenna and a receiver (Rx) antenna. At least one of the Tx and Rx antennas has a leaky-wave antenna (LWA) array for transmitting or receiving one or more signal beams with a range resolution and an angle resolution. The LWA array has a plurality of LWAs configured as a filter bank. By using the filter bank based LWAs, the LWA array may coherently stitch or combine the individual spectrums of the LWAs to have a wide frequency-space coverage for providing improved range and / or angle resolutions.

A method for optimizing satellite signal performance in a satellite transmission system. The method includes: obtaining signal data from at least some of the plurality of customer receivers, measuring the signal data from each of the signal beams that were obtained; analyzing metadata from the components of the satellite transmission system, signal source front end controls, and spectral sampling; identifying signal degradation at the satellite spacecraft in the space segment from the signal data of actual spot beam coverage using the measured signal data and the analyzed metadata; and predicting remediation actions to correct the signal degradation at the satellite spacecraft in the space segment.

The invention discloses a bifocal plane imaging system and a multidirectional beam splitter, and the bifocal plane imaging system comprises an illumination module which is configured to provide an illumination light beam for a to-be-measured piece, and the illumination light beam forms a signal light beam on the surface of the to-be-measured piece; the objective lens assembly is configured to receive the signal light beam and optically focus on the second to-be-measured layer; the light splitting assembly is arranged on an emergent light path of the objective lens assembly and is configured to split the signal light beam to form a first light beam transmitted in a first direction and a second light beam transmitted in a second direction; the first imaging module is configured to receive the first light beam in a first direction and optically focus the first light beam on a first to-be-measured layer through focusing processing, and the first light beam is used for imaging the first to-be-measured layer; and the second imaging module is configured to receive a second light beam in a second direction, and the second light beam is used for imaging a second layer to be measured. According to the invention, the detection efficiency of the two to-be-detected layers can be improved.

The invention discloses a 980nm-waveband ytterbium-doped fiber laser with expandable power and high beam quality. The 980nm-waveband ytterbium-doped fiber laser is composed of a single-mode seed source, a K-level fiber amplifier and an output coupling end. The single-mode seed source adopts an optical fiber oscillator and is composed of a first gain optical fiber, a first pumping signal beam combiner, a first pumping module, a first cladding light filter, a second cladding light filter, a high-reflectivity optical fiber grating, a low-reflectivity optical fiber grating, a first filter and a mode field adapter. The K-stage optical fiber amplifier is composed of K single-stage optical fiber amplifiers and K-1 filters, and except the last single-stage optical fiber amplifier, the output end of each single-stage optical fiber amplifier is connected with one filter. Each of the K single-stage optical fiber amplifiers comprises a section of gain optical fiber, two pumping signal beam combiners, two pumping modules and two cladding light filters, and the gain optical fiber is a step double-cladding ytterbium-doped optical fiber. According to the invention, high beam quality output can be ensured, and the total output power can be improved.

The invention provides a laser measurement method, a laser radar and an autonomous vehicle, and relates to the field of laser radar measurement. The method comprises the steps that a first laser beam and a second laser beam are generated, and the frequency change directions of the first laser beam and the second laser beam are opposite in a frequency sweeping period; multiplexing the first and second laser beams into a swept-frequency beam; splitting the sweep-frequency light beam into a signal light beam and a local oscillator light beam; transmitting a signal light beam; receiving a reflected light beam; performing in-phase orthogonal coherent demodulation on the local oscillation light beam and the reflection light beam so as to obtain scalar values of beat frequency in a frequency raising stage and beat frequency in a frequency lowering stage; and detecting the beat frequency of the up-conversion phase and the beat frequency of the down-conversion phase to determine the speed and / or distance of the object. According to the scheme, a measurement blind area can be avoided, and the measurement precision is improved.

The invention relates to a directional covert communication method and system based on a phased-array antenna, and aims to improve the concealment and safety of a communication system through directional signal transmission and intelligent beam control. According to the method, a phased-array antenna array is adopted, and the direction of a signal beam is accurately controlled by adjusting the phase difference of antennas, so that a signal only covers a target area and is prevented from being leaked to a non-target area, and detection or interference by an enemy is effectively prevented. Through an ad hoc network communication protocol, each node dynamically selects an optimal communication path according to a real-time network state, and the reliability and stability of the system in a complex environment are ensured. In addition, the direction and range of the wave beam are adjusted in real time according to the signal intensity and the environment change through the self-adaptive wave beam adjusting technology, and the anti-interference capability and the concealment of communication are further enhanced. The method is suitable for the wireless communication fields of unmanned aerial vehicles, ad hoc networks and the like which require high concealment and detection resistance.

The invention discloses a full-duplex radar communication system joint transmission beam forming method based on deep learning, and the method comprises the steps: firstly carrying out the mathematical modeling of the performances of transmitting and receiving signals, radar perception and communication rate of an FD-ISAC system; in the constructed model, the base station receives a signal and obtains an estimated angle of the user through a traditional channel estimation method. Secondly, uplink historical channel state information and downlink historical channel state information are calculated based on the angle; and then designing a cross attention-gated cyclic unit network (CAttn-GRU Net) which takes the uplink historical channel state information and the downlink historical channel state information as input to predict a radar signal covariance matrix and a communication signal beam forming matrix, so as to respectively assist in constructing a sensing signal and a beam forming design at the current moment. In addition, in the training process, a multi-objective optimization loss function is adopted.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a beam management configuration that indicates a set of resources to be used by the UE for transmitting a plurality of reference signals, including at least one sounding reference signal (SRS) and at least one demodulation reference signal (DMRS), to be used for beam refinement during an uplink beam management occasion; and transmit, to the base station, the at least one SRS and the at least one DMRS based at least in part on the beam management configuration. Numerous other aspects are provided.

A first network node (10, 400) is configured to be used in a wireless communication network. The first network node (10, 400) determines a modified configuration of reference signal beams of a serving cell of the first network node (10, 400). The first network node (10, 400) sends a first indication (14) to a second network node (20, 400). The first indication (14) comprises a configuration update message describing the modified configuration of reference signal beams of the serving cell.

A multi-beam charged particle beam system includes a detection unit configured for a dynamic compensation of charging effects of a sample. The detection unit comprises a relay optical system comprising an adaptive mirror array for keeping signal beams at the position of entrance apertures of lightguides od detection elements. Thereby, beam distortions induced by charging effects can be compensated. The disclosure can be applied to, for example, wafer inspection with multi-beam charged particle beam system.

Embodiments are directed to the association of concurrent tracks across multiple views for sensing objects. A sensing system that employs signal beams to scan paths across an object may be provided such that two or more sensors separately detect signals reflected by the object. Events may be determined based on the detected signals such that the events include pairs of events that correspond to pairs of sensors. Essential matrices may be generated based on the positions of each pair of sensors. The pairs of events associated with the pairs of sensors may be compared based on the essential matrices of the sensors. Scores for the pairs of events may be provided based on the comparison. If a score for a pair of events may be less than a threshold value, each event in the pair of events may be associated with a same location on the object.

An optical module includes a light receiving assembly and a first fiber optic adapter. The light receiving assembly includes a first lens group, a plurality of wavelength division demultiplexers and at least one light receiving component. The first lens group is configured to split optical signals transmitted to the first cavity body for a first time according to a wavelength to obtain a first optical signal beam and a second optical signal beam. The plurality of wavelength division demultiplexers include a first wavelength division demultiplexer and a second wavelength division demultiplexer. The first wavelength division demultiplexer is configured to split the first optical signal beam for a second time according to a wavelength. The second wavelength division demultiplexer is configured to split the second optical signal beam for a second time according to a wavelength. The light receiving component includes a plurality of light receiving chips.

The invention provides a reverse pumping / signal beam combiner, a preparation method and application, a hollow-core optical fiber is used as a signal optical fiber of the beam combiner, the same ends of the signal optical fiber and a plurality of pumping optical fibers form a beam combining end of an optical fiber bundle through fused biconical taper beam combination, and the signal optical fiber is located in the center of the optical fiber bundle. The other pumping optical fibers are evenly distributed on the periphery of the signal optical fiber, the output optical fiber is welded to the beam combining end of the optical fiber bundle, fiber cores of the hollow-core optical fiber and the output optical fiber in the optical fiber bundle are aligned, Fresnel reflection can occur at a melting point formed by close welding of the end faces of the hollow-core optical fiber and the output optical fiber, and the output optical fiber is matched with a mode field of the hollow-core optical fiber. The prepared reverse pumping / signal beam combiner can be applied to an optical fiber laser system and simultaneously undertakes the tasks of the reverse pumping / signal beam combiner and a low-reflectivity grating, and the hollow-core optical fiber can more flexibly control the output light mode and the light beam quality.

A communication terminal may include interwoven high and low band phased array antennas that form signal beams in respective bands. The high band antenna may have center-grounded folded patch radiators. The low band antenna may have folded patch radiators that each surrounds a different respective center-grounded folded patch radiator of the high band antenna. The low and high band antennas may be mounted to ground traces on an antenna board. The antenna board may be mounted to a feeding board. Beamforming circuitry for the low and high band antennas may be disposed on the feeding board. The patch radiators of the low and high band antennas may be formed from free-standing folded sheet metal. The folded sheet metal may be mounted to the antenna board by conductive standoffs. The conductive standoffs may be used to feed the antenna radiators and / or to short the antenna radiators to the ground trace.

Provided in the present application are a beam scheduling method and apparatus for satellite communication. The method comprises: on the basis of whether there are uplink and downlink transmissions on each beam position, determining whether each beam position is occupied by a signaling beam; and scheduling the signaling beam within the current scheduling period to a beam position which is not occupied by the signaling beam. In the beam scheduling method and apparatus for satellite communication that are provided in the present application, on the basis of whether a beam position is occupied by a signaling beam, a beam position selection mechanism is determined, such that flexible and dynamic scheduling of beam resources can be implemented, so as to avoid the situation where some beam positions occupy certain scheduling slots despite having no traffic or a small traffic volume, while some beam positions cannot use idle slot resources despite having a larger traffic volume, such that the flexibility of beam scheduling and the utilization efficiency of beam resources are improved.

Embodiments are directed to the association of concurrent tracks using graph crossings. Signal beams may be employed to scan paths across an object such that sensors separately detect signals from the signal beams reflected by the object. Crossing points may be determined based on a plurality of trajectories that intersect each other during the scan of the object. Graphs may be generated based on the portion of trajectories and the crossing points such that each edge in the graphs corresponds to a crossing point and such that each node in the one or more graphs corresponds to a trajectory. The graphs may be compared to determine one or more matched graphs that may share a common topology. Common trajectories may be determined based on the matched graphs such that each common trajectory may be associated with a same path across the object and a separate sensor.

The embodiment of the invention discloses an on-chip integrated homodyne Doppler vibration meter, a vibration measuring device and application. The homodyne Doppler vibration meter comprises a substrate; the first multi-mode interferometer, the second multi-mode interferometer, the third multi-mode interferometer, the fourth multi-mode interferometer and the fifth multi-mode interferometer are located on one side of the substrate, and the second multi-mode interferometer, the third multi-mode interferometer, the fourth multi-mode interferometer and the fifth multi-mode interferometer form a 90-degree mixer. An output light beam of a light source is divided into a signal light beam and a reference light beam through a first multi-mode interferometer, the signal light beam is transmitted to a to-be-measured target, the signal light beam returned by the to-be-measured target enters a 90-degree mixer, the signal light beam and the reference light beam achieve homodyne interference in the 90-degree mixer, and meanwhile an in-phase component and an orthogonal component of a signal are obtained; therefore, complete phase and amplitude information is obtained, and vibration measurement of the to-be-measured target is realized. The homodyne Doppler vibration meter is integrated on the same chip, and has the advantages of small size, low power consumption, low cost and the like.

The invention provides a beam scheduling method and device for satellite communication. The method comprises the following steps: determining whether each beam position is occupied by a signaling beam according to whether uplink and downlink transmission exists on each beam position; and scheduling the signaling beam in the current scheduling period to a beam position which is not occupied by the signaling beam. According to the beam scheduling method and device for satellite communication provided by the invention, a selection mechanism of the beam position is determined according to whether the beam position is occupied by the signaling beam, flexible and dynamic scheduling of beam resources can be realized, and the situation that some beam positions do not have services or still occupy certain scheduling time slots when the service volume is very small is avoided; and the flexibility of beam scheduling and the utilization efficiency of beam resources are improved under the condition that some beam positions cannot use idle time slot resources although the service volume is relatively large.