322 results about "Narrow beam" patented technology

The invention relates to the technical field of communication, in particular to an airborne Tiantong phased-array antenna and an application method thereof. According to the method, phased-array antenna beams are driven to perform electronic scanning according to a geometric azimuth angle, beacon signal blind acquisition is performed in a preset airspace in a wide beam mode, and when an initial signal is detected, the mode is immediately switched to a narrow beam scanning mode; dynamically adjusting a phase weighting coefficient to realize pointing adjustment, so that a signal quality parameter is continuously converged in an optimal threshold interval; carrying aircraft maneuvering acceleration feedback is introduced, beam pointing offset is dynamically compensated based on a pre-constructed interference feature library, and signal fluctuation caused by a multipath effect is suppressed; and continuously checking a data validity flag bit of the main inertial navigation system, seamlessly switching to an antenna built-in inertial navigation data stream when a failure threshold is triggered, and activating a rapid recapture program to maintain zero interruption of a communication link. Through dual-source inertial navigation data fusion and intelligent beam control, rapid and accurate tracking of Tiantong satellites in an airborne environment is realized.

A transmission tower deformation monitoring device based on a phased array radar technology relates to the field of irregular contour metering, and comprises a map construction module used for constructing a regional digital map; the boundary determination module is used for near-field region boundaries; the signal acquisition module is used for acquiring a near-field echo signal of a near-field region through a narrow beam and acquiring a far-field echo signal of a far-field region through a wide beam; the calibration table construction module is used for constructing a signal intensity comparison table; the data processing module is used for determining effective monitoring data; the error calculation module is used for performing error calculation on the effective monitoring data to obtain a phase error and an amplitude error; and the parameter determination module is used for determining iron tower deformation parameters. According to the invention, the accuracy of transmission tower deformation monitoring can be improved.

The invention discloses a low-orbit satellite beam resource allocation method based on deep reinforcement learning, and the method comprises the steps: firstly building a satellite system model according to a low-orbit satellite system hopping beam scene, obtaining the communication traffic demand and geographic position of a ground user through a satellite traffic monitoring facility, and carrying out the preprocessing; secondly, carrying out user clustering on information of communication traffic demands of ground users, and dividing a ground cell into a hot spot area and a non-hot spot area; and then based on a satellite system model, establishing an optimization problem of multi-beam resource allocation and control, adopting a deep reinforcement learning method, dynamically adjusting a beam resource allocation strategy, allocating narrow beam resources to a hot spot area, and allocating wide beam resources to a non-hot spot area to realize system throughput maximization and user fairness. According to the method, the resource allocation problem in the low-orbit satellite hopping beam scene is effectively solved, and the throughput of a satellite system is improved while the user fairness is ensured.

The invention relates to a forward millimeter wave radar antenna. The antenna comprises a body, a wide-beam waveguide antenna, a narrow-beam waveguide antenna and waveguide transmission channels, wherein the wide-beam waveguide antenna, the narrow-beam waveguide antenna and the waveguide transmission channels are integrated in the body; the waveguide transmission channels comprise a first waveguide transmission channel and a second waveguide transmission channel; the wide-beam waveguide antenna comprises a polarization conversion structure; the antenna unit comprises a first antenna radiation cavity, a first slot radiation slot and a first opening horn which are connected in sequence, and the polarization conversion structure is connected with the first antenna radiation cavity; a first choke groove; the narrow-beam waveguide antenna comprises a splitter which is connected with the second waveguide transmission channel; the antenna structure array comprises a plurality of sub-antenna structure units, and each sub-antenna structure unit comprises a second antenna radiation cavity, a second slot radiation slot and a second opening horn which are connected in sequence; and the second choke groove is arranged beside the antenna structure array. According to the invention, the requirements of short-distance wide-angle coverage and long-distance high-precision detection are met, and the production cost is reduced.

The invention provides a wide and narrow wave beam adjustable array antenna, which comprises at least two groups of sub-arrays, each group of sub-arrays comprises at least one high-frequency dual-channel antenna, the side edge of each high-frequency dual-channel antenna is provided with a reflection boundary, and the reflection boundary is driven by a lifting device to ascend and descend. The high-frequency dual-channel antenna works in a corresponding wave beam working mode under the condition that the reflection boundary is at a plurality of different heights; wherein the beam working mode comprises a wide beam mode, a first conventional antenna mode and a second conventional antenna mode, and the beam width of the first conventional antenna mode is different from that of the second conventional antenna mode. According to the invention, the beam width can be adjusted by adjusting the height of the reflection boundary, so that the requirements in different scenes are met.

The invention discloses a PT symmetrical hot-pressing resistance MEMS wind speed and wind direction sensor. The sensor comprises four groups of PT symmetrical MEMS resonators which are orthogonally distributed and have hot-pressing resistance feedback; the PT symmetrical MEMS resonator comprises two cantilever beam resonators with completely same structures, a coupling spring beam connected with the two resonators, and a constant current source connected with one resonator, each cantilever resonator comprises two anchor areas, a wide beam connected with the anchor areas, a narrow beam with a piezoresistive effect, a warped thin plate structure and external electrodes located on the two sides of the thin plate structure. Wind speed and wind direction signals are converted into rigidity change of the resonator array through mechanical action by means of a warped thin plate structure, and the rigidity change enables the PT symmetrical MEMS system to deviate from an EP point, so that system frequency splitting is caused. As the frequency splitting quantity of the PT symmetric system is in direct proportion to the square root of the disturbance quantity, the wind speed and direction sensor can detect tiny wind speed signals, and has the advantages of very high sensitivity, simple process, high integration level and the like.

A method for wireless baseband processing for realizing integrated sensing and communication (ISAC) includes: designing based on a wireless baseband processing procedure of a base station, adding an ISAC beam management module in a transmitter, and adding a sensing function (SF) module to a receiver; sending a wide sensing-communication transmission beam through the ISAC beam management module, and decoding sensing information from a reflected sensing echo through the SF module, the sensing information including a target location; narrowing a beam, aiming at the target location, and sending a narrow sensing-communication transmission beam through the ISAC beam management module based on the sensing information; and designing a manner for separating an uplink communication beam and echo data of a sensing-communication transmission beam received by the base station, the sensing-communication transmission beam including the wide sensing-communication transmission beam and the narrow sensing-communication transmission beam.

The invention provides an array error robust narrowest beam synthesis method based on sparse optimization. According to the method, for the problem that a main lobe area of an array antenna cannot be accurately determined under the low side lobe constraint, slack variables are introduced, the high-gain spot beam optimization problem is converted into the main lobe width minimization problem, robustness control over array amplitude-phase errors is introduced into the constraint, and the beam forming performance under the condition that array errors exist is remarkably improved. The method comprises the following calculation steps: 1, constructing a comprehensive convex constraint condition of a directional diagram according to beam pointing and an upper bound of an array amplitude-phase error; 2, constructing a cost function based on a logarithm minimization problem of an e index sum, and constructing a directional diagram comprehensive convex optimization problem; and 3, solving an optimization problem by using a convex optimization solving tool. According to the method, while the width of the main lobe is minimized, accurate control over the characteristics of the main lobe and the side lobe of the directional diagram is achieved under the condition that the amplitude-phase error boundary is given.

The invention discloses a beam management method, a base station, a storage medium and a program product, relates to the technical field of wireless communication, and can simplify detection and alignment steps in a beam forming process, realize faster and more accurate beam forming and ensure robustness and reliability of a communication system in a complex scene. The method comprises the steps that a sensing signal is sent periodically, an echo signal of the sensing signal is received, the sensing signal is used for sensing mobile information of a terminal, and the echo signal is obtained by reflecting the sensing signal through the terminal; determining movement information of the terminal relative to the base station according to the echo signal; a first wave beam is determined according to the movement information, a signal is sent to a terminal through the first wave beam, the width of the first wave beam is within a set width range, and the maximum value of the set width range is smaller than a narrow wave beam width threshold value.

Aspects of the disclosure relate to user equipment (UE)-assisted beam broadening in a wireless communication system configured to employ beamforming. A UE may determine downlink channel characteristics by monitoring for, receiving, and measuring a suitable downlink reference signal. Based on the channel characteristics the UE may select a wide beam corresponding to a set of narrow beams. The UE may then transmit a report identifying the selected wide beam by indicating a direction of the selected wide beam and an angular width of the selected wide beam. Other aspects, embodiments, and features are also claimed and described.

The invention discloses an unmanned aerial vehicle communication low-complexity beam prediction method and system based on a control view angle, and aims to solve the problem of narrow beam alignment and tracking in a high mobility scene. According to the method, beam offset is decomposed into offset caused by attitude change of the unmanned aerial vehicle and offset caused by relative position change of the unmanned aerial vehicle and the base station. For the offset generated by the attitude change of the unmanned aerial vehicle, the variable quantity of the offset relative to the previous time slot is predicted, based on a command / control sequence provided by a flight control system, local dynamic characteristics are captured through exponential decay variation, a dynamic action space is constructed in combination with the beam offset variable quantity, and the precision and real-time performance of beam prediction are optimized. And the beam offset caused by the change of the relative position of the base station is directly calculated through a geometric method. The method is extremely low in calculation complexity, can be realized in real time, and has a relatively high prediction success rate, relatively low beam scanning overhead and relatively high data transmission performance in a high dynamic scene of the unmanned aerial vehicle.

This disclosure describes procedures for UE and network on initial access, to ensure the normal operation of system and to obtain high energy efficiency and obtain high access reliability. Consider power efficiency, wide and narrow beams are considered in NTN systems to achieve more efficient DL / UL transmission scheduling. However, there may be EIRP split issue for beam differentiation. For example, 50%EIRP are allocated for wide beam and 50%EIPR are allocated for narrow beam, then there may be -3db loss compared with no EIRP split. In view of mentioned issue, novel schemes for Synchronization signal and PBCH design in NTN are mentioned in this patent.

The invention provides a signal transmission method and a communication device. The method comprises the steps that a first communication device sends a reference signal to a second communication device through an RIS, the RIS sends the reference signal to the second communication device based on first processing, and the first processing is that a first part of elements in a beam vector are processed according to a first rule, such as zero setting and inverse equality processing; or the first processing is to process a first part of arrays of the RIS according to the first rule, if the state of the part of arrays is switched. According to the method and the device, the states of partial elements or arrays of the beam vector of the RIS can be adjusted, so that wide and narrow beam switching is realized, and the beam training efficiency is improved.

The present disclosure relates to the field of communications, and provides a communication sensing method and system and a related device. The method comprises: using a plurality of downlink communication symbols in a specific time slot of a communication signal to roughly measure a target wide beam where a target object is located; if the target wide beam exists, multiplexing sensing transmission symbols on the downlink communication symbols in front of a guard interval symbol in the specific time slot, to send a mixed data stream of a data stream of the communication signal and a data stream of a sensing signal obtained on the basis of mixed precoding and mixed beam forming; and during the guard interval symbol in the specific time slot, using sensing reception symbols for sensing reception, to sense a target narrow beam where the target object is located. The method provided by the present disclosure can improve the wireless resource utilization, and provide sensing capabilities under full-area coverage with minimal impact on communication network performance, providing additional sensing services at a relatively low cost.

The invention relates to the technical field of indoor positioning, in particular to a millimeter wave CSI (Channel State Information) indoor positioning method and system based on a generative adversarial network, and millimeter waves are large in bandwidth, narrow in beam, high in time resolution and space angle resolution and capable of reducing the influence of a multipath effect. Position estimation is directly obtained from CSI data directly obtained in the millimeter wave communication process, complex signal processing and filtering steps of obtaining other parameters from CSI are avoided, and the system calculation complexity is greatly reduced. The information of the AP position is extracted from the high-dimensional observation vector by using the generative adversarial network, so that complex positioning algorithms such as Kalman filtering or graph optimization are avoided, and the calculation complexity is reduced; according to the method, AP position estimation is obtained through confrontation training of the generator and the discriminator, position coordinates of reference points do not need to serve as labels, input data are all label-free data, dependence on marked data is avoided, and prior knowledge such as the AP or the reference points is not needed.

Lighting system having visible-light source including semiconductor light-emitting devices arranged for generating plurality of visible-light emissions having range of color points including cool to very cool white color point for daytime and warm to very warm white color point for nighttime. Optical system arranged for causing some visible-light emissions to have range of beam widths including relatively wide and narrow beam widths. Mounting system causing range of beam directions. Control system causing visible-light emissions to include daytime configuration having cool to very cool white color point and relatively wide beam width, and nighttime configuration having warm to very warm white color point and relatively narrow beam width. Daytime configuration includes control system for causing visible-light emissions to include lateral- or up-light emissions, promoting relatively high equivalent melanopic lux. Nighttime configuration includes control system for causing visible-light emissions to include down-light emissions promoting relatively low equivalent melanopic lux.

The invention discloses a thermocompression resistance PT symmetrical MEMS pressure sensor, which comprises two resonators with identical structures, and the two resonators are connected through a group of coupling spring beams. Each resonator comprises four anchor areas connected with the thin film substrate, narrow beams which are connected with the four anchor areas and have a piezoresistive effect, and a mass block connected with the four narrow beams, and the four anchor areas are symmetrically distributed on the two sides of the mass block. For one of the resonators, a current path is formed through connection of a constant current source in the anchor section on the same side of the mass block. Under the action of a constant current source, hot resistance pressing feedback is generated at narrow beams of the resonators, so that the two coupled resonators form a PT symmetric system, and the PT symmetric resonators are initially arranged at an Exception Point (EP) point. When pressure acts on the lower surface of the substrate, the substrate generates strain, the position of the anchor area is driven to change, the rigidity of the resonator is changed, a PT symmetric system deviates from an EP point, the system eigenfrequency is split and shows pull-ratio oscillation, and the frequency splitting amount depends on the pressure borne by the substrate. Because the EP point has a large response to tiny disturbance, the thermal pressure resistance PT symmetric MEMS pressure sensor can realize accurate measurement of weak pressure change, and has the advantages of high sensitivity and simple manufacturing process.

A sidelink transmission beam scan may be performed; performing sidelink by transmitting a first portion of a symbol at a first transmission power using a wide beam at the start of the slot during a sidelink transmission slot comprising a plurality of symbols and transmitting two or more second portions of the symbol at a second transmission power using two or more narrow beams after the first portion The transmission beam is scanned, one second portion per narrow beam, and a second transmission power is determined based on a gain difference between the wide beam and the narrow beam. The first portion includes at least one or more symbols for automatic gain control in one or more receiving devices, and the second portions include at least reference signals, one reference signal per second portion.

A relay node may receive a pattern index indicating a beam pattern. Further, the relay node may receive resource information indicating a beam type. Also, the relay node may receive one or more first beam indexes associated with the indicated beam pattern. On a condition that the indicated beam type is narrow and a beam index of the one or more first beam indexes corresponds to a wide beam type, the relay node may determine second beam indexes for a set of narrow beams associated with the beam index of the one or more first beam indexes corresponding to the wide beam type. Moreover, the relay node may determine a beam and time-domain resources for each of the determined second beam indexes based on the pattern index and resource information. Accordingly, the relay node may transmit data using the determined beam and at least one of the determined time-domain resources.

The invention relates to the technical field of sensor sensing, and discloses a microspur sensing method and system for an MEMS ultrasonic sensor array, and the method comprises the steps: carrying out the phase calibration of the MEMS ultrasonic sensor array, and obtaining a phase calibration parameter; performing near-field spherical wave phase compensation on the phase calibration parameter based on the macro target distance and the incident angle to obtain a near-field compensation parameter; controlling the MEMS ultrasonic sensor array to execute beam forming of wide beam scanning and narrow beam focusing according to the near-field compensation parameter to obtain a macro focusing sound field; transmitting ultrasonic waves to a rear vehicle target through the micro-distance focusing sound field and receiving a reflection signal, and performing vehicle feature recognition on the reflection signal to obtain a vehicle recognition result; and positioning calculation of the target angle and distance is carried out based on the vehicle identification result to obtain rear vehicle positioning data, and the angle resolution and the distance measurement precision in a microspur range are improved.

Methods, systems, and devices for wireless communications are described for beam measurement and selection using separate synchronization signal block (SSB) bursts for wide beams and narrow beams, where a periodicity of SSB bursts of narrow beams may be longer than a periodicity of SSB bursts with wide beams. A user equipment (UE) may predict narrow beam measurements (such as using an artificial intelligence or machine learning (AI / ML) model) at occasions of the wide beam SSBs that do not include the narrow beam SSBs. The UE may identify control resource set or remaining minimum system information resources, or random access channel resources for a random access transmission, based on the measured and predicted measurements.

The invention relates to the technical field of underwater detection, and discloses an underwater oil pipeline leakage detection method based on acoustic imaging and image recognition, and the method comprises the steps: firstly, employing wide-beam acoustic imaging to recognize a candidate region with a plume form; then switching to a high-coherence narrow beam mode, detecting the phase of the reference point echo after passing through the candidate area, and calculating a phase jitter quantitative index; performing cooperative judgment in combination with morphological characteristics and phase jitter indexes, and confirming a leakage event; and finally, performing three-dimensional scanning on the confirmed leakage area, constructing a phase disturbance intensity spatial distribution diagram, and determining accurate three-dimensional coordinates of a leakage source according to a peak point of the phase disturbance intensity spatial distribution diagram. Through bimodal combination of the morphological characteristics of the target and the physical characteristic of sound wave phase jitter caused by leakage turbulence, the method can effectively distinguish real leakage from acoustic false targets such as fish schools and suspended silt, significantly reduces the detection false alarm rate, and achieves high-precision three-dimensional positioning of a leakage source.

Various solutions for initial access with enhanced beam configuration in wireless communications are described. A network node may configure a cell with at least one wide beam and one or more narrow beams. The wide beam is associated with a cell-defining synchronization signal block (CD-SSB) and each of the narrow beams is associated with a non-cell-defining synchronization signal block (NCD-SSB) or a channel state information-reference signal (CSI-RS). The network node may transmit the CD-SSB on the wide beam. Then, the network node may receive a random access request from an apparatus for initial access to the cell.

The invention provides an anti-interception communication access method, system and device, a storage medium and a program product, and relates to the technical field of wireless communication networks, and the method comprises the steps: generating a radio frequency signal through an intelligent array antenna based on a time slot index and a beam power index, and transmitting the radio frequency signal to a satellite, so as to obtain the service data of a service copy packet; the radio frequency signal comprises a sending signal corresponding to each time slot, and each sending signal carries a service copy packet; and in any two adjacent time slots, the intelligent array antenna sends corresponding sending signals in one time slot by adopting a wide beam mode and a high power mode, and the intelligent array antenna sends corresponding sending signals in the other time slot by adopting a narrow beam mode and a low power mode. Through the above mode, the orthogonality of the wave beam and the power can be fully utilized to avoid the situation that the signal is intercepted by an electronic reconnaissance satellite, the anti-interception performance of the aircraft is improved, and the risk that the aircraft is exposed is reduced.

The invention discloses a 4D millimeter wave radar antenna and a nested array and an anti-interference design method thereof. According to the method, a multi-transmitting and multi-receiving orthogonal array is adopted to construct a larger equivalent virtual aperture under a limited size, and hardware adopts a double-layer waveguide and is matched with multi-resonance broadband matching to cover 76-81 GHz; a multifunctional nested sub-array is introduced to realize division cooperation of long-distance narrow beam, short-distance high resolution and pitching enhancement, and a side lobe is suppressed and the size of an array plane is reduced by sharing aperture and channel multiplexing; the frequency spectrum orthogonality and mutual interference resistance of the same-domain radar are improved through segmented calibration, online interference detection and sub-band selection and switching; on the premise of meeting the resolution, the size of the module is reduced through sparse topological optimization. According to the method, the stable detection distance and the weak and small target detection capability can be improved, the fusion and false association probability is reduced, unnecessary braking is reduced, missing detection / false alarm caused by mutual interference is reduced, and the constraint on the whole vehicle model and the installation window is reduced.

The invention discloses an anti-interference method based on a phased-array antenna, and belongs to the technical field of phased-array antennas. The method comprises the following steps: S1, carrying out phased-array antenna beam angle calculation according to acquired geographic position information and attitude information, and communicating with a communication target; s2, carrying out interference source target scanning on the coverage airspace, respectively obtaining multiple groups of target position data, and forming multiple groups of position matrixes; s3, screening out a real interference source target; s4, accurately positioning a real interference source target by using a difference beam, and determining an accurate coordinate of the real interference source target to obtain an interference source position; and S5, performing anti-interference processing on the position of the interference source, performing communication in a narrow beam mode, and performing zero setting processing on the position of the real interference source in the phased array directional diagram to realize system anti-interference. According to the invention, the communication influence of interference signals on the phased-array antenna is reduced, the anti-interference performance of the phased-array antenna is greatly improved, and the communication reliability of the phased-array antenna is ensured.

This invention discloses a three-element leaky wave antenna array structure based on a dielectric ridge parallel plate waveguide, comprising: S1, designing a three-element array structure based on the coupling characteristics of the dielectric ridge parallel plate waveguide, wherein the two-port array antenna is fed by probes in parallel; S2, determining the slot design of the three elements according to the pattern product theorem and the relationship between slot size and leakage, thereby designing a scanning beam that meets the requirements of narrow beamwidth and high gain. This invention is a leaky wave antenna array structure with narrow beamwidth and high gain characteristics proposed to meet the requirements of high signal strength and strong anti-interference in long-distance point-to-point communication systems. This antenna can provide better directivity and higher communication quality, while ensuring that the antenna has the advantages of compact structure and small size, thus it can be applied to wireless power transmission systems such as satellite communication systems, radar systems, and the Internet of Things.

Disclosed herein is a first wireless communication node comprising a first communication module that includes a first baseband unit configured to handle baseband processing for the first communication module, a first RF unit configured to define a frequency range of radio signals for the first communication module, and a first antenna unit configured to generate a first extremely-narrow beam that facilitates exchange of radio signals with at least one other wireless communication node. The first wireless communication node may also comprise a second communication module that includes a second baseband unit configured to handle baseband processing for the second communication module, a second RF unit configured to define a frequency range of radio signals for the second communication module, and a second antenna unit configured to generate a second extremely-narrow beam that facilitates exchange of radio signals with at least one other wireless communication node.

The invention relates to the technical field of beam forming, and discloses an RIS enhanced beam-width-adjustable beam forming method, system, medium and equipment, and the method comprises the steps: constructing an RIS-assisted ISAC system, constructing a sensing channel model in the system, and calculating the phase shift of standard beam forming; calculating the sensing gain of the potential target by combining the position of the sensing target relative to the user center based on the phase shift of the standard beam forming; reconstructing the sensing gain of the potential target by using a stationary phase method, and solving an ideal beam forming phase shift when the sensing gain of the reconstructed potential target is optimal; adjustment of the beam width and the channel gain is realized by adjusting the expression form of the ideal beam forming phase shift. According to the invention, the width of the sensing beam can be adjusted and is used for replacing resource-intensive narrow beam scanning sensing, so that the resource utilization rate is improved, the interference is reduced, and the calculation complexity is reduced.

The invention provides a method and a device for enhancing beam configuration in wireless communication. The network node may divide the total transmit power into a first transmit power and a second transmit power. The network node may then configure one or more wide beams, serving one or more user equipments (UEs) within one or more first areas covered by the wide beams to share the first transmission power. Furthermore, the network node may also configure one or more narrow beams to serve one or more UEs within one or more second areas covered by the narrow beams to share a second transmission power.