48 results about "Spot beam" patented technology

The invention discloses a light spot beam divergence angle calculation method and device based on adaptive threshold correction and a medium, and relates to the technical field of laser communication. The method comprises the following steps: continuously acquiring a debugging light spot picture output by image acquisition equipment, and calculating the maximum gray value of the debugging light spot picture; based on the maximum gray value, the exposure of the image acquisition equipment is adjusted until an initial light spot picture with the maximum gray value and the number of pixels reaching a preset threshold value is output; based on a preset initial pixel threshold value, calculating a pixel value variance of the initial light spot picture, and updating the initial pixel threshold value until a target pixel threshold value enabling the pixel value variance to reach a maximum value is obtained; setting a pixel value lower than a target pixel threshold value in the initial light spot picture to zero to obtain a target light spot picture; and calculating a first moment and a second moment of the target light spot picture to obtain a light spot beam divergence angle of the target light spot picture. According to the method, the calculation precision of the beam divergence angle of the light spot is improved by adjusting a threshold selection mechanism for maximizing the exposure degree and the variance.

In an embodiment, a method implemented in a WTRU comprises receiving a first message comprising first information indicating a configuration of a set of precoders, a set of correction factors, association between each precoder of the set of precoders with at least one correction factor from the set of correction factors, and at least one RS; receiving at least one reference signal; determining a first precoder based on at least one measurement on the at least one RS; determining a subset of correction factors associated with the first precoder; determining a correction factor from the subset of correction factors; determining a second precoder based on the first precoder and the determined correction factor; and transmitting a second message comprising second information indicating the second precoder.

Systems and methods for uplink transmission timing are provided. In some embodiments, a method of operation of a wireless device in a cellular communications network includes receiving a transmission, from a network node, in a downlink slot; determining a reference uplink slot index in an uplink frame timing of the wireless device where the reference uplink slot index corresponds to the downlink slot in which the transmission was received; and transmitting an uplink transmission in response to the received transmission in an uplink slot a number of slots, K, after the determined reference uplink slot index. This may enable transmission in satellite radio access networks by establishing the transmission timing relationships that are suitable for long propagation delays and the large differential delay in a spotbeam in satellite communications systems that may range from sub-milliseconds to tens of milliseconds.

The application discloses a kind of self-adapting threshold correction spot beam divergence angle calculation method, equipment and medium, it is related to laser communication technical field.The method includes: continuously obtaining the debugging spot picture of image acquisition equipment output, and the maximum gray value of debugging spot picture is calculated;Maximum gray value is based, and the exposure of image acquisition equipment is adjusted, until the initial spot picture of maximum gray value and pixel number reaches preset threshold value is output;Based on preset initial pixel threshold value, the pixel value variance of initial spot picture is calculated, and initial pixel threshold value is updated, until the target pixel threshold value that makes pixel value variance reach maximum value is obtained;Zero is placed in the pixel value lower than target pixel threshold value in initial spot picture, to obtain target spot picture;The first moment and second moment of target spot picture are calculated, to obtain the spot beam divergence angle of target spot picture.The application is by adjusting exposure and variance maximization threshold selection mechanism, to improve the calculation precision of spot beam divergence angle.

A satellite communications system (SCS) (20) implements a beam recentering function (32) that dynamically recenters one or more spot beams (10) with respect to their corresponding nominal beam coverage areas (40), as a component of user scheduling. Updating the beam center target (46) of a spot beam (10) can be understood as adjusting beamforming by the SCS (20) to move the beam center (14) of the spot beam (10), such that maximum signal power of the beam corresponds to different locations within the same nominal beam coverage area over time. In an example embodiment, the SCS (20) uses dynamic beam centering with respect to a plurality of forward user beams (100), with the underlying beamforming being ground-based beamforming, such as end-to-end beamforming, or being satellite-based beamforming, which may be supported by ground-based or satellite-based computation of the dynamically changing beamforming solution.

An integrated antenna device and a phase calibration method thereof are provided. The integrated antenna device includes an antenna array formed by patch antenna units and a beamforming integrated circuit. The antenna array is disposed on a first surface of a substrate. The patch antenna units are symmetrically arranged around an array center of the antenna array, and each of the patch antenna units includes a first feed point and a second feed point. The BFIC is disposed on a second surface of the substrate and connected to the first feed point and the second feed point of each patch antenna unit. The first feed point and the second feed point of each patch antenna unit are disposed outside each patch antenna unit relative to the array center of the antenna array. The BFIC overlaps a central area of the antenna array.

The invention discloses a spot beam pattern generation system and a spot beam pattern generation method, and relates to the technical field of safety communication, the system comprises: a feed source and a radiation array element communicate through a target frequency obtained through random selection in the feed source, the feed source is used for receiving a microwave signal, and the microwave signal is transmitted to the radiation array element through the target frequency; the radiation array element is used for receiving a microwave signal sent by the feed source and radiating the microwave signal into a space to generate a spot beam directional diagram. According to the invention, the connection mode between the feed source and the radiation array elements is improved into a random selection and distribution mode, the feed signal of each radiation array element randomly and repeatedly selects a target frequency from the feed source array, and the microwave signal is transmitted to the radiation array elements through the randomly selected target frequency. And the radiation array element radiates the microwave signal to a space to generate a spot beam directional diagram. According to the random mode, decoupling of distance and orientation of the directional diagram can be achieved, and therefore the spot beam directional diagram can be generated.

The invention discloses a multi-star-point beam expansion transmission method for suppressing radio wave interference, and belongs to the technical field of wireless communication. According to the method, the problem that signals in an edge coverage area are unstable due to an electric wave interference effect in a multi-satellite coverage scene is solved. According to the invention, four communication satellites respectively carry out different time-frequency domain extension transformation on transmitted signals, so that the four communication satellites can transmit different waveform signals which are incoherent and loaded with the same information, and ground user equipment receives downlink signals of the four satellites at the same time and carries out EWFRFT inverse transformation and conventional demodulation on the downlink signals. Different waveforms are formed in the coverage area to improve the signal quality in the edge coverage area, so that severe fluctuation of electromagnetic signals caused by the interference effect is effectively suppressed, then serious interference fading caused by carrier phase difference when ground user equipment receives the signals at the same time is suppressed, and the signal quality of users in the edge coverage area is improved. The method can be applied to the technical field of wireless communication.

The present invention provides an integrated antenna device and a phase calibration method that can be assembled as a large antenna array and that can obtain the phase error between each patch antenna unit in the integrated antenna device through a simple calculation. [Solution] The integrated antenna device 100 includes an antenna array formed by a plurality of patch antenna units and a beam shaping integrated circuit. The patch antenna units, which are installed on the first surface of the substrate, are arranged symmetrically around the center of the antenna array, and each patch antenna unit includes a first feed point and a second feed point. The beam shaping integrated circuit, which is installed on the second surface of the substrate, is connected to the first and second feed points of the patch antenna units. The first and second feed points of the patch antenna units are located outward relative to the array center of the antenna array of the patch antenna units, and the beam shaping integrated circuit overlaps with the central region of the antenna array.

Embodiments of the present application provide a dual-polarized antenna, a network device and a network system. The dual-polarized antenna comprises at least one target circuit, each target circuit comprising a first unit circuit and a second unit circuit, each unit circuit comprising a beamforming transceiver front-end chip and at least one antenna element, the antenna element comprising a first feeding point and a second feeding point, the beamforming transceiver front-end chip comprising a first common end, a second common end, a first type port connected to the first common end, and a second type port connected to the second common end; the common ends of the beamforming transceiver front-end chips in the first unit circuit and the third unit circuit are oppositely arranged, the polarizations of the common ends of the beamforming transceiver front-end chips in the two unit circuits are defined in reverse, and the connection relationship between the antenna elements and the ports of the beamforming transceiver front-end chips in the two unit circuits also needs to be reversed, thereby avoiding the generation of a cross at the end branch of a parallel feeding network.

Broadband satellite communications systems using optical feeder links are disclosed. Various optical modulation schemes are disclosed that can provide improved capacity for fixed spot beam, on board beamforming, and ground-based beamforming broadband satellite systems.

In an embodiment, a method implemented in a WTRU comprises receiving a first message comprising first information indicating a configuration of a set of precoders, a set of correction factors, association between each precoder of the set of precoders with at least one correction factor from the set of correction factors, and at least one RS; receiving at least one reference signal; determining a first precoder based on at least one measurement on the at least one RS; determining a subset of correction factors associated with the first precoder; determining a correction factor from the subset of correction factors; determining a second precoder based on the first precoder and the determined correction factor; and transmitting a second message comprising second information indicating the second precoder.

Methods, systems, and devices for satellite beam tracking of individual mobile terminals are described. Communication services may be provided to the mobile terminals via beamformed spot beams that track the movement of the mobile terminals. To generate beamformed spot beams, channel state information based on the mobile terminals' positions may be determined based on measurements of signals communicated with the mobile terminals. Beamforming coefficients based on the channel state information may be applied to position the beamformed spot beams at the center of each mobile terminal's position. The beamforming coefficients may be periodically modified so that the beamformed spot beams remain at the center of the mobile terminal's moving position.

This invention relates to a rapid method for determining conical field-of-view occlusion, comprising: S1, setting Δ blk Let the occlusion triangle be represented by its three vertices A, B, and C, and the center line of the conical field of view. Determine the occlusion triangle Δ. blk Does the plane S containing the antenna reflector aperture intersect with the conical field of view? If they intersect, then the Δ on the upper part of plane S... blk Divided into (Δ blk )1、(Δ blk S2; Determine whether it is consistent with (Δ) blk S1. Intersect; S3. Determine if any of A, B, and C is inside the conical field of view; S4. Determine Δ blk Does there exist an edge that intersects the conical field of view? S5, If (Δ blk If 2 is not empty, then for (Δ) blk 2. Repeat steps S2 to S4; traverse the triangular mesh of all obstructions; traverse the azimuth of all conical fields of view to determine the azimuth of the obstructed conical fields of view. This invention enables rapid and quantitative calculation of the spatial distribution of the azimuth of a two-axis rotatable point beam antenna when it is obstructed by a star.

Disclosed embodiments relate satellites using a Software-Defined Radio (“SDR”) system. In one example, a geostationary (GEO) satellite includes an antenna system including multiple antennas, each configured to provide a spot beam having an adjustable throughput for a terrestrial coverage area while the antenna is in an active state and the satellite is in orbit above the Earth, a front-end subsystem communicatively coupled to the antenna system having an input side including an input filter and an analog-to-digital converter, and an output side including an output filter and a digital-to-analog converter, and a software defined radio (“SDR”) communicatively coupled to the antenna system via the front-end subsystem. The SDR, in response to a surge modification request, modifies a throughput of each active antenna by increasing or decreasing a share of a satellite power budget allotted to the antenna by deactivating or activating a previously active or previously inactive antenna, respectively.

A method of producing a non-uniform ion implant in a workpiece, including storing a target pattern as a target pattern array, analyzing the target pattern to identify maximal gradients, rotating the target pattern and the workpiece to align with a spot beam profile and a scan direction, and transposing the target pattern to a process array. The method further includes optimizing the process array, calculating a largest possible beam spot size, selecting a corresponding spot beam recipe, performing a test scan to determine a beam sweep angle of the spot beam, and rotating the target pattern, the process array, and the workpiece to account for the beam sweep angle. The method further incudes generating a predicted process dose pattern and comparing it to the target pattern, and calculating at least one measure of error representing a fidelity of the predicted process dose pattern to the target pattern.

The application discloses a kind of on-orbit pointing deviation correction methods for flat panel satellite point beam two-dimensional mechanical antenna, the method comprises: on-orbit real-time acquisition antenna pointing ground station azimuth, elevation angle and telemetry information;Actual and theoretical signal gain difference is calculated inversely;Whether the gain difference meets the pointing accuracy requirement is judged, if not, the deviation angle of actual and theoretical pointing vector and actual pointing vector are calculated inversely;Optimal theoretical pointing vector is solved using Gauss-Newton method;The installation matrix of matching theory pointing is solved and the antenna installation matrix is adjusted;The above steps are repeated to form a closed loop, until the gain difference meets the accuracy requirement.The application uses three-dimensional installation matrix correction instead of traditional zero position correction, combined with closed-loop feedback and nonlinear optimization, realizes multi-source error high-precision compensation, and has strong engineering implementability, meets the on-orbit multi-satellite batch correction demand of flat panel satellite, significantly improves the reliability and data transmission rate of communication system.

Methods, systems, and devices for past event signal tracking are described. In some examples, a system may receive feed element signals corresponding to a set of feed elements of an antenna. To support a primary or real-time mission, the system may process the feed element signals according to a first beamforming configuration to generate spot beam signals, which may include communications scheduled for respective spot beams. To support a retroactive or searching mission, the system may also store the feed element signals for some duration. Based on a determination to search for a target signal from a target location within a coverage area of the antenna, the system may process the stored feed element signals according to a second beamforming configuration to generate a target spot beam signal corresponding to the target location, and evaluate the target spot beam signal for a presence of the target signal.

The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. The disclosure relates to a wireless communication system. A system and a method of multi transmission and reception point (TRP) beam failure recovery for special cell (SpCell) and medium access control (MAC) control element (CE) prioritization are provided.

A method for operating a communications device is provided. The communications device is configured to transmit uplink signals to and / or to receive downlink signals from a non-terrestrial infrastructure equipment forming part of a non-terrestrial network, NTN, and to transmit uplink signal to and / or to receive uplink signals from a terrestrial infrastructure equipment forming part of a terrestrial network, TN. The method comprises communicating with the non-terrestrial infrastructure equipment via one of a plurality of spot beams, each of the spot beams providing a first wireless access interface for transmitting the uplink signals to and / or receiving the downlink signals from the non-terrestrial infrastructure equipment within a coverage region formed by the each of the spot beams, and communicating with the terrestrial infrastructure equipment via a second wireless access interface provided by the terrestrial infrastructure equipment.

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 one or more individual customer receivers from the signal data of the actual spot beam coverage while monitoring signal parameters over the diverse geographical region using the measured signal data and the analyzed metadata; and predicting a remediation action to correct the signal degradation at the one or more individual customer receivers.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive a radio resource control (RRC) configuration associated with a UE-initiated beam sweep. The UE can transmit a request for the UE-initiated beam sweep based at least in part on the RRC configuration, where the request indicates quasi-co-location (QCL) information for the UE-initiated beam sweep. The UE can receive a plurality of reference signals based at least in part on the UE-initiated beam sweep, where the UE-initiated beam sweep is a UE-initiated single transmission reception point (TRP) (sTRP) beam sweep, a per-TRP beam sweep in multi-TRP (mTRP) operation, or a UE-initiated beam sweep for mTRP simultaneous operation. Numerous other aspects are described.

A method comprising transmitting signals to one or more communications devices within a radio coverage area provided by infrastructure equipment, the infrastructure equipment forming either part of a non-terrestrial network of a wireless communications network and wherein the radio coverage area forms a spot beam of the non-terrestrial network, or part of a terrestrial network and wherein the radio coverage area is a cell of a terrestrial network, wherein the transmitting the signals includes transmitting signalling information indicating that one or more neighbouring coverage areas to the radio coverage area provided by the infrastructure equipment are either formed by a spot beam of a non-terrestrial network, a spot beam of the non-terrestrial network of which the infrastructure equipment forms part, a cell of a terrestrial network or a cell of the terrestrial network of which the infrastructure equipment forms part.

The application discloses a large wideband phased array antenna electric axis and mechanical axis alignment method and system, and belongs to the technical field of phased array antennas. The method comprises the following steps: in the frequency slicing stage, the working frequency of the phased array antenna is equally divided into n slicing frequency points in the instantaneous bandwidth range; in the beam scanning and data acquisition stage, the amplitude data set of each slicing frequency point is collected; in the electric axis position extraction stage, the electric axis position is extracted from the amplitude data set of each slicing frequency point, and an electric axis position set is obtained; in the electric axis center calculation stage, the least square method is used to find the regional electric axis position set, which is used as the electric axis center position of the phased array antenna in the instantaneous bandwidth; and in the electric axis and mechanical axis alignment stage, the beam scanning instruction is set according to the electric axis center position, so that the electric axis and the mechanical axis of the phased array antenna are aligned. The application is not affected by the precision of artificial mechanical adjustment, and can achieve the alignment precision of the electric axis and the mechanical axis at the level of 0.01 degrees.

Methods, systems, and devices for per-link mobile satellite beam collision cancellation are disclosed herein. Communication services may be provided to a mobile terminal via a forward link and a backward link that track respective beamforming spot beams of movement of the mobile terminal. When a conflict occurs between the forward links and / or the backward links of two or more beams, one of the conflicting forward links or backward links may be switched to a different resource element without changing the resource elements of the other forward links and backward links of the two or more beams, the communication service may be continued to be provided to the associated mobile terminal via the forward link and the backward link.

The described technology relates to improved methods, systems, devices, and apparatuses for supporting mobile satellite beam capacity compensation. Communication services may be provided to a mobile terminal via respective beamformed spot beams that track the mobile terminal's movement. A beam manager may perform resource element allocation for the beam. The beam manager may compensate for link impairments associated with resource elements associated with the beam by modifying one or more characteristics associated with the resource elements. The beam manager may determine the presence of link impairments associated with the resource elements and, based thereon, allocate more power to the associated beam and / or assign the beam to additional resource elements. The beam manager may determine the presence or absence of link impairments and compensate for them during repeated time periods.

Invention relates to a method realized by a system comprising at least an access point (100) capable of transmitting and receiving N number of AP (access point) beams and at least a user equipment (200) capable of transmitting and receiving M number of UE (user equipment) beams where N is larger than M. Synchronization Signal Blocks (SSB) transmitted by one access point (100) are arranged to include an identity information and reflected back from by user equipment (200) sweeping all UE beams and AP beams. In one embodiment, SSB are transmitted in bursts and in another embodiment SSB are transmitted one by one.

This application provides a method, system, and medium for direct satellite communication between a mobile phone and a satellite based on a spaceborne phased array antenna. The method includes: constructing a direct satellite communication system using a 5G NTN architecture; generating multiple movable point beams based on DBF technology, with the mobile phone terminal within the coverage area of ​​the movable point beams; analyzing Doppler frequency shift based on a space-ground cooperative control network and adjusting the Doppler frequency shift according to frequency offset compensation information; fitting the movable point beams to the mobile phone terminal to obtain a primary waveform; performing noise suppression and signal gain on the primary waveform to obtain an optimized waveform; constructing a multi-dimensional constraint model to perform target optimization on the optimized waveform; adjusting the array information of the spaceborne phased array antenna based on the optimization results to achieve data communication between the mobile phone terminal and the satellite; and performing dynamic real-time compensation through space-ground cooperative control to effectively offset the frequency drift caused by the high-speed movement of low-orbit satellites and ensure the stability of the space-ground communication link.

This invention provides a method for creating a point-beam data transmission mission for a shipborne mobile receiving station to remote sensing satellites. The method includes: using the acquired approximate position and orbital element information of the shipborne receiving station, calculating a set of all approximate visible time windows for the entire day; then using this set to determine the approximate time window for the target data transmission mission; based on the approximate time window, sequentially calculating the ship's geocentric latitude, ship's travel distance, and spherical arc length; determining, based on the spherical arc length, whether the ship's course change exceeds a preset threshold; if so, performing segmented ship position prediction; otherwise, performing direct ship position prediction to obtain a precise predicted ship position; expanding the approximate time window based on the precise predicted ship position to obtain a precise time window; and then using the precise time window and the precise predicted ship position to construct the point-beam data transmission mission. This invention achieves precise planning of the satellite data transmission mission and ensures that the shipborne station antenna points towards the satellite to form a two-way closed link.