410 results about "Beam pattern" patented technology

The invention discloses a reciprocity theorem-based array antenna multi-beam pattern synthesis method, which comprises the following steps of: establishing an array antenna model in electromagnetic simulation software, and extracting a radiation pattern of each antenna unit; defining the number and direction of to-be-formed beams and the gain ratio between the beams; establishing an array antenna energy transmission efficiency transfer function, calculating scattering parameters of each antenna unit of the array antenna through a reciprocal theorem and coordinate transformation, and constructing a scattering parameter matrix of a multi-antenna system; automatically adjusting parameters by using a particle swarm algorithm, and dynamically regulating and controlling the gain proportion between the beams; the optimal excitation value of each antenna unit is obtained, and a target beam is generated after actual loading. According to the invention, the multi-beam synthesis result of the array antenna is more convenient, more stable and more flexible.

The invention provides a low-orbit satellite beam scheduling optimization method and system based on a simulated annealing algorithm, and belongs to the technical field of satellite communication. Firstly, modeling is carried out on a determined satellite communication system model and communication service distribution in a satellite coverage range, then a channel model between a satellite and a communication terminal is established, then constraint conditions of a problem are determined, mathematical modeling is carried out on the optimal beam scheduling problem, and the optimal beam scheduling problem is obtained. In order to simultaneously improve the coverage communication service volume and reduce the inter-beam interference, the beam scheduling problem is solved by using the simulated annealing algorithm, the optimal design of the beam pattern is realized, and the comprehensive performance of the low-orbit satellite communication system is improved.

Apparatuses, methods, and systems are disclosed for uplink power control. One method includes receiving uplink power control parameters. The method includes determining a first transmit power for the first uplink transmission based on a corresponding first set of uplink power control parameters. The method includes determining a second transmit power for the second uplink transmission based on a corresponding second set of uplink power control parameters. The method includes performing the first uplink transmission using a first uplink transmission beam pattern or a first spatial domain transmission filter based on the first transmit power. The method includes performing the second uplink transmission using a second uplink transmission beam pattern or a second spatial domain transmission filter based on the second transmit power.

Aspects presented herein may improve network energy saving by enabling a base station to transmit SSBs in a set of SSBs with different periodicities. In one aspect, a base station configures each SSB in a set of SSBs with an SSB transmission periodicity for a time period, the time period including multiple SSB burst set transmission occasions, where at least a first SSB and a second SSB in the set of SSBs are configured with different SSB transmission periodicities. The base station transmits the set of SSBs based on a corresponding SSB transmission periodicity of each SSB over the time period.

A method for evaluating a device having at least one antenna array, the device being configured to form a plurality of communication beam patterns using the antenna array, the method comprising: positioning the device in a measurement environment around the device or moving / switching a sounding / link antenna in the measurement environment, the measurement environment being adapted to measure the beam pattern; and controlling the device to form a predefined beam pattern among the plurality of communication beam patterns. The method comprises: measuring the predefined beam pattern using the measurement environment and / or the device.

The invention provides a beam calibration method and device, which are beneficial to improving the accuracy of beam calibration. The method comprises: a first communication device obtaining a downlink beam pattern of a terminal device and an uplink beam pattern of the terminal device, the downlink beam pattern being obtained by the terminal device by measuring a downlink reference signal sent by a network device; the uplink beam pattern is obtained by measuring an uplink reference signal sent by the terminal equipment by the network equipment; the first communication device determines first information based on the downlink beam pattern and the uplink beam pattern.

The invention discloses an array amplitude-phase error calibration method based on joint sparse estimation. The method comprises the following steps: setting a correction sound source to be positioned in an unknown far-field direction relative to a sensor linear array; the method comprises the following steps: dividing an observation area of a sensor linear array to obtain a plurality of grid points, correcting an array sampling signal based on the grid points and offset, constructing an array response signal model, and performing joint sparse direction-of-arrival estimation of the grid points and the offset to obtain a corrected sound source signal direction-of-arrival; the joint sparse estimation method for solving and correcting the direction of arrival of the sound source signal is popularized to a planar array and a multi-frequency cross array through iterative correction; and on the basis of the estimated corrected sound source direction of arrival, array amplitude-phase error calibration is completed by adopting a spatial filtering method. According to the method, the problem of beam pattern attenuation caused by existing array amplitude phase error calibration is solved, the error correction precision and correction efficiency are improved, and the application range of the error calibration method in multiple array types is widened.

A relay station includes first antennas used for communication with the terminal station, a second antenna used for communication with a base station, and a radio device performing non-regenerative relay. The relay station transmits a first beam pattern with an maximum SINR of a received signal from the terminal station, the received signal including a part of self-interference and measured in a first slot of a wireless frame. An information processing apparatus acquires a beam pattern set based on the first beam pattern and transmits to the relay station. In a second slot, based on SINRs of received signals from the terminal station measured for each of beam patterns included in the beam pattern set in a plurality of symbols, the relay station selects a second beam pattern from the beam pattern set, and updates a beam pattern to be used by the first antennas to the second beam pattern.

The invention relates to the technical field of communication beam control, in particular to a beam control algorithm for wireless communication, which comprises the following steps of: selecting an initial beam direction set through a preset beam mode library; constructing a channel state feature map through a deep learning model, and predicting a future channel change trend of the user; according to the future channel change trend of the channel state feature map, preliminarily adjusting the beam direction set to generate a plurality of candidate beam directions; the self-adaptive tuning module based on reinforcement learning adjusts the beam width, so that the beam is concentrated in the target user direction and covers a potential multi-path reflection path; and continuously updating the beam pattern library and the deep learning model. According to the invention, the beam direction can be dynamically adjusted, so that the effectiveness and stability of signal coverage are improved, and the communication quality in a complex propagation environment is ensured.

According to the out-of-focus holographic measurement method of the radio telescope based on planetary zooming, a planet is used as a source for out-of-focus observation, a beam pattern of an actually observed planet is obtained through deconvolution, a theoretical far-field model of the planet is established, and the theoretical far-field model of the planet is compared with the actually observed beam pattern to calculate a redundancy value. And continuously updating the coefficient of the Zernike polynomial by minimizing the redundancy value and iterating until the optimal phase model is determined, and determining the phase error on the aperture plane according to the phase model. According to the out-of-focus holographic measurement method, the planet is introduced to serve as a radio source, the measurement precision and stability are improved, the real-time measurement effect and the multi-frequency calibration capability are enhanced, the calibration accuracy and the overall performance of the Tianmar radio telescope are remarkably improved, many limitations of a traditional surface type measurement method are solved, and the measurement precision and the measurement stability are improved. For example, the measurement speed is slow, additional hardware equipment is needed, the influence of weather is large, and the application range is limited.

A phased array antenna module includes a plurality of antenna elements, a storage region, a temporary parameter store, an address generation unit, and a setting unit. The storage region is configured to store more than 256 items for at least one of intensity setting values and phase setting values. The temporary parameter store temporarily store a part of an address of the storage region. The address generation unit is configured to generate an address of the storage region according to the first address bitgroup stored in the temporary parameter store and the second address bit-group. The setting unit is configured to read at least one of the intensity setting values and the phase setting values by using the address of the storage region. The setting unit is configured to set an intensity and a phase to be set in each of the antenna elements.

The invention discloses an image sonar gain adaptive control method based on an FPGA. The method comprises the following steps: an upper computer sends a control message carrying a manual gain parameter to a sonar signal processing board based on an Ethernet UDP protocol so as to execute manual gain control; a codeword gain and voltage gain cooperative control architecture is provided; pID closed-loop feedback control is carried out based on beam pattern characteristics, and when a manual gain value changing message issued by the Ethernet is received, the adaptive gain compensation value and the PID historical state are cleared, and the manual gain code is switched to an instruction specified value. According to the invention, conflict-free switching between a self-adaptive mode and a manual mode can be realized, and in addition, the quality of sonar images and the stability of gain regulation and control are improved while large dynamic range and high-precision adjustment of time-varying gain are realized.

The invention discloses a deconvolution super beam forming method and system for a multi-beam sonar image, and belongs to the field of sonar image processing. Collecting multi-beam sonar data, and creating a target characteristic database; generating a point spread function for deconvolution by using a super beam forming method; the azimuth spectrum is optimized through a Richardson-Lucy iterative algorithm; adjusting algorithm parameters, and verifying the performance of the optimized Dcv-HBF algorithm through simulation and experiments; and outputting a clear target sonar image for target detection and background noise suppression analysis. According to the method, the principle of hyper-beam forming HBF and the principle of deconvolution conventional beam forming Dcv-CBF are combined, an HBF beam pattern serves as a point spread function PSF, deconvolution is conducted on the orientation spectrum of the HBF through the R-L iterative algorithm, the spatial spectrum of Dcv-HBF is generated, and the spatial resolution and background noise suppression capacity of sonar imaging are improved.

A lamp for a vehicle and a method therefor are provided. The lamp includes optical systems to form a beam pattern by irradiating light onto a road surface, and an assembly unit to assemble and integrate the optical systems. Each of the optical systems includes: a light source part to generate light; a condensing lens part provided on a front side of the light source part to condense and output the light input from the light source part; a shield part formed to shield a portion of the light input from the condensing lens part; and an output lens part to output the light passing the shield part to the road surface. The beam pattern includes unit pattern areas formed by the optical systems, respectively, and orientation angle of light output from each of the optical systems on to the road surface is different from one another.

Methods, systems, and devices for wireless communication are described. For instance, a network entity may receive control information indicating a set of candidate geolocations within a target coverage area for the network entity. The network entity may transmit a signal that is beamformed via a set of antenna elements of an antenna array of the network entity in accordance with a set of antenna beamforming weights. The set of antenna beamforming weights may be identified based on a beam pattern performance criterion applied to a set of candidate radiation patterns of a spatial envelope model. The spatial envelope model may be based on a set of directions between the antenna array of the network entity and the set of candidate geolocations as well as a set of pathloss values associated with the set of candidate geolocations.

Systems and methods for a global headlamp. An example method includes obtaining configuration information indicative of a jurisdiction associated with a vehicle. Headlamp state information is accessed which includes multiple headlamp states. A current headlamp state of the multiple headlamp states is determined based on the configuration information. A propagation is output via a pixelated light source in a headlamp of the vehicle, the propagation representing a particular beam pattern which is compliant with the jurisdiction.

An electronic device according to various embodiments may comprise: a housing; an antenna structure comprising a substrate, which comprises a first substrate surface facing a first direction and a second substrate surface facing a second direction opposite from the first substrate surface, and at least one antenna element disposed on the substrate so as to form a beam pattern in the first direction; a first support part disposed so as to at least partially correspond to the second substrate surface; a conductive bracket comprising at least one conductive extension part disposed higher than the second substrate surface with respect to the first support part; and a wireless communication circuit configured to transmit and / or receive a wireless signal in a designated frequency band by means of the at least one antenna element.

The invention discloses a main lobe gain maximization method for an analog-digital hybrid array of a radar communication system. According to the method, the ratio of the maximum minimum main lobe level to the peak side lobe level is used as a target function, and under the main lobe ripple constraint, the simulation weight constant modulus constraint and the digital weight power constraint, the ADMM (Alternating Direction of Multiplexing) is used for carrying out joint design on the simulation weight and the digital weight. In the ADMM framework, a Riemann conjugate gradient method is adopted to solve a simulation weight subproblem with constant modulus constraint; and solving a digital weight by adopting a Lagrange multiplier method. A numerical result shows that the method can generate better main lobe ripples and lower peak side lobe level, and has good beam directional diagram accurate control performance.

The invention provides a performance evaluation method of a remote space reflection communication system, the reflection communication system comprises a transmitting end, a receiving end and a reflector, the transmitting end is used for transmitting a transmitting signal, the reflector is used for reflecting the transmitting signal to obtain a reflection signal, and the receiving end is used for receiving the reflection signal. The method comprises the following steps: acquiring equipment parameters of a reflection communication system and position information of a transmitting end, a receiving end and a reflector; calculating a reflection communication basic link budget of the reflection communication system according to the double-station radar equation; calculating a beam pattern based on the equipment parameters, and calculating a correction coefficient based on the beam pattern and the position information; and correcting the reflection communication basic link budget by using the correction coefficient to obtain a reflection communication link budget correction value, thereby realizing link performance evaluation.

A WTRU is configured with input and output beam patterns and AI / ML models with trained weights. Each input beam pattern includes beam indexes for a set of input beams, and each output beam pattern includes beam indexes for a set of output beams. Each AI / ML model corresponds to one output beam pattern. The WTRU measures signal quality of a subset of the set of input beams of each input beam pattern to identify a best input beam and reports that beam to a base station. The WTRU receives, from the base station, an indication of one of the input beam patterns and one of the output beam patterns for predicting a best output beam based on the report. The WTRU predicts the best output beam using the AI / ML model corresponding to the indicated output beam pattern and the trained weights and reports the predicted best beam to the base station.

The invention provides a joint optimization method and system for MIMO radar waveform design and antenna array arrangement, and belongs to the technical field of radar signal processing. A covariance matrix of a transmitting signal set is converted into a transmitting weight matrix of a time domain, and matching optimization of a radar waveform and an expected beam pattern is realized based on the transmitting weight matrix; according to the method, the directional diagram performance of the optimized radar waveform of the time domain in actual emission can be ensured, meanwhile, the influence of an antenna array arrangement vector on an emission beam pattern is considered, joint optimization is carried out on the radar waveform corresponding to an emission weight matrix and the antenna array arrangement vector, collaborative optimization between waveform design and array design is achieved, and the method has the advantages of being high in practicability and high in practicability. The overall performance potential of the system can be fully excavated, and the actual demand of a target detection task in a complex environment can be well met.

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 discloses an RIS auxiliary sensing integrated beamforming design based on manifold optimization, relates to the technical field of wireless communication, and aims to meet the requirement of high-precision sensing service in a 6G wireless communication system. By using the RIS technology, the invention provides an alternative optimization algorithm, which effectively improves the communication rate and reduces the interference between users. According to the method, the trade-off factor rho is introduced to balance communication and sensing performance, and dual optimization of the communication and sensing performance is realized. In the method, the communication sum rate of a'trade-off 'mode (rho = 0.2) reaches about 14 bit / s / Hz, the mean square error (MSE) of a beam pattern is controlled to be-4dB, and the system performance is remarkably improved.

The invention is suitable for the technical field of acoustics, array signal processing and sonar, and provides a broadband high-gain beam pattern optimization method suitable for any array. S1, calculating a weight vector matrix of each order of eigen beams; s2, solving a broadband weighting matrix through CVX; s3, synthesizing a broadband high-gain beam pattern; according to the method, the optimal beam pattern is decomposed into characteristic beams with different robustness and directivity based on generalized characteristic decomposition, under the constraint of expected beam pattern performance, the joint weighting coefficient of each order of characteristic beams is optimized, the broadband weighting matrix of the characteristic beams is calculated, and the final broadband high-gain beam pattern is synthesized according to the weighting coefficient. According to the method, the broadband high-gain beam pattern can be obtained under the constraint condition, meanwhile, the effects of constant beam width, robustness and high gain are achieved, compared with a method disclosed in the prior art, the directivity of a beam former is higher, and the method is suitable for any array.

In a biometric identification system, a transparent body can have a curved platen surface. The curved platen surface can be removably contacted by an anatomy of a user. The anatomy can have an anatomical pattern. An illumination source can illuminate the curved platen surface with an illumination beam. The illumination beam can propagate away from the curved platen surface as a return beam having a beam pattern shaped to correspond to the anatomical pattern. An imaging lens can focus the return beam to form a real image of the beam pattern at an image location. Field-curvature-correcting sensor optics can include a sensor. The sensor can sense the real image of the beam pattern at the image location. The field-curvature sensor optics can include a planar sensor and an image-flattener lens. The field-curvature sensor optics can include a curved, convex sensor.

A voice noise reduction method, system, device and medium based on a differential beam former, the method is based on a theoretical beam pattern of the differential beam former, and uses a Chebyshev polynomial to derive a relationship among a main lobe width, a side lobe amplitude and a Chebyshev polynomial order, so as to reduce noise of the main lobe width, the side lobe amplitude and the Chebyshev polynomial order. Further constructing an ideal beam pattern capable of accurately controlling the width of a main lobe and the amplitude of a side lobe; based on the constructed ideal beam pattern, constructing different beam formers by adopting a zero point constraint method, a diagonal loading mode and a combined delay summation beam former; the beam formers can accurately control the width of a main lobe and the amplitude of a side lobe of a beam, can carry out direction adjustment at any angle under the condition of no beam pattern distortion, can be suitable for any array of microphone arrays, are robust to self-noise of microphones, can effectively carry out voice noise reduction, and have good applicability and robustness.

Apparatuses, methods, and systems are disclosed for uplink power control. One method includes: operating a network entity with multiple antenna arrays; determining a first closed-loop power control process for a first set of uplink beam patterns based on a first antenna array of the multiple antenna arrays, wherein at least one receive beam pattern of the first antenna array is used to receive a first uplink transmission using at least one uplink beam pattern; determining a second closed-loop power control process for a second set of uplink beam patterns based on a second antenna array of the multiple antenna arrays, wherein the second antenna array is different from the first antenna array; and indicating to the device in a configuration message the first closed-loop power control process and the second closed-loop power control process.

The invention discloses a multi-unmanned aerial vehicle communication sensing integrated trajectory and beam forming optimization method based on MATD3. The method comprises the following steps: constructing a communication sensing integrated system supported by multiple unmanned aerial vehicles; in the aspect of communication, a communication link gain and a signal to interference plus noise ratio (SINR) are calculated, and communication and rate are derived therefrom; in the sensing aspect, the beam pattern gain is calculated; establishing an optimization problem by taking maximization of the total data rate of all communication users in the task time period as an optimization target; associating the communication user and the sensing user with the unmanned aerial vehicle by using a K-means-based hierarchical user association algorithm; and training the unmanned aerial vehicles by using an MATD3 algorithm of centralized training and distributed CTDE execution, and completing optimization of the multi-unmanned aerial vehicle sensing integrated trajectory and beam forming. According to the method, a more practical roaming user scene and three-dimensional deployment of the unmanned aerial vehicle are considered, and relatively high communication and rate are achieved while sensing requirements are met.

An apparatus guides a land vehicle along a pathway on which there are one or more side targets with different radar reflectivity characteristics compared to the pathway. The apparatus comprises a radar sensor, a processor, and an inertial measurement unit (IMU). The radar sensor is mounted to the vehicle and configured to radiate to the pathway one or more signals having a main beam pattern center aimed toward the ground and sideways from the vehicle. The radar sensor is further configured to detect one or more reflection signals from one or more of the side targets along the pathway. The processor is configured to determine based on a reflection signal a lateral distance between the vehicle and a side target as the vehicle passes or first encounters the side target. The IMU is configured to determine a change of lateral position of the vehicle between side targets.

Disclosed are techniques for wireless sensing. In some aspects, a sensing node may transmit a first set of one or more sensing reference signals over a first set of transmit beams during a first stage of a sensing session. The sensing node may transmit a second set of one or more sensing reference signals over a second set of transmit beams during a second stage of the sensing session based on a plurality of criteria, wherein the plurality of criteria is based on one or more measurements of one or more sensing targets obtained by beamsweeping the first set of transmit beams, and wherein beamwidths of the second set of transmit beams are narrower than beamwidths of the first set of transmit beams.