336 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.

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 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 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.

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.

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 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.

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.

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.

Example embodiments provide a biomedical illumination device enabling multiwavelength laser line generation with automated beam alignment. The biomedical illumination device may include a plurality of laser light sources configured to provide beams of one or more wavelengths, wherein one or more of the beams are directed towards one or more actuator-controlled mirrors; the one or more actuator-controlled mirrors configured to steer the one or more beams for passing through a beam shaping element, wherein for each of the one or more beams at least one actuator-controlled mirror is configured for steering the respective beam automatically according to instructions received from a control device; the beam shaping element configured to output a beam pattern having a certain geometry for illumination of a microscopic sample based on the steered beams; and the control device configured to monitor the beams output from the beam shaping element to determine a position of the output beam pattern in relation to a target beam pattern position at the sample; determine instructions for one or more of the actuator-controlled mirrors to tilt in at least one axis based on a difference between the monitored position of the output beam pattern and the target beam pattern position at the microscopic sample; and transmit the instructions to the one or more actuator-controlled mirrors.

The invention provides a differential microphone array speech enhancement device and method based on reference point optimization, and relates to the technical field of speech signal processing. The device comprises a microphone array, a pre-processing module, a reference point selection module and a signal processing module. According to the invention, the reference point of the microphone array is improved from the first microphone in the prior art to the geometric center of the invention, the maximum value of the distance rm from the microphones in the microphone array to the reference point is reduced by half, the high frequency band is significantly reduced, and the approximation precision of Jacobi-Anger expansion is ensured. Through reference point optimization, the invention aims to realize a beam pattern with invariable frequency in a broadband range and combined optimization of DF and WNG. While the beam pattern approximation requirement and no distortion constraint are met, the white noise gain can be maximized, and the robustness is improved.

The invention belongs to the technical field of beam forming, and discloses a frequency control array beam forming method based on logarithmic multicarrier, which comprises the following steps: S1, determining the array element arrangement position and structure of a frequency control array, and selecting a symmetrical array structure; s2, dividing a trigonometric function, adopting asymmetric frequency offset, introducing logarithmic multicarrier on the basis of triangular frequency offset, and designing the frequency offset; s3, substituting the designed frequency offset form into a transmitting beam model of the basic frequency control array; and S4, substituting the designed frequency deviation into the basic frequency control array model to obtain a beam directional diagram under the frequency deviation, and completing the design. According to the technical scheme provided by the invention, the beam width of the frequency control array beam directional diagram is effectively reduced, and the resolution of the beam is improved.

The invention discloses an RIS-assisted MIMO radar transmitted beam forming method based on beam pattern matching, and the method comprises the steps: taking the minimization of a beam pattern matching error as a criterion, and carrying out the combined optimization of a transmitted waveform and an RIS reflection coefficient; applying constant modulus constraint to the transmitted waveform; applying per-unit mode constraint to the RIS reflection coefficient; constructing a non-convex optimization problem model for a target based on beam pattern matching error minimization; decomposing an optimization problem into two sub-problems of transmitted waveform optimization and RIS reflection coefficient optimization by adopting an alternating minimization framework; converting the non-convex objective function into a quadratic convex function by using a maximum and minimum method; adopting a gradient projection algorithm to quickly solve a quadratic programming problem under the constant modulus constraint and the per-unit modulus constraint; alternately optimizing a transmitted waveform and an RIS reflection coefficient; according to the method, the optimized transmitted waveform and the RIS reflection coefficient are obtained, and the optimal matching of the actual transmitted beam pattern and the ideal beam pattern is realized.

Particular embodiments described herein provide for a system, an apparatus, and a method for provide for a terahertz testing facility for cryogenic near field beam pattern measurement at terahertz frequencies. The vacuum chamber includes an anechoic chamber that includes an antenna under test, a testing chamber that includes testing equipment, and a thermal / radiation shield between the anechoic chamber and the testing chamber, wherein the thermal / radiation shield thermally separates the anechoic chamber and the testing chamber.

Example embodiments relate to techniques and systems for transmit beam agnostic radar calibration. A computing system can transmit each transmit antenna element of a radar to individually transmit electromagnetic energy according to a first transmit beam pattern and generate data representing a collection pattern based on reflections of the electromagnetic energy transmitted according to the first transmit beam pattern. The computing system can also synthesize, using the data representing the collection pattern, a second transmit beam pattern that differs from the first transmit beam pattern and estimate a mutual coupling matrix for processing reflections of electromagnetic energy transmitted according to the second transmit beam pattern. The computing system can then generate, by the computing system and based on the mutual coupling matrix, a model for operating the radar onboard a vehicle. The model can enable a vehicle radar system having one or more radars that match the radar to transmit and receive electromagnetic energy according to the first transmit beam pattern and the second transmit beam pattern.

According to various embodiments, an electronic device includes a front cover; a rear cover facing away from the front cover; a side frame surrounding a space between the front cover and the rear cover and at least partially includes a first conductive portion; a first array antenna includes a first substrate disposed in the space and a plurality of first antenna elements disposed on the first substrate and configured to form a beam pattern toward the first conductive portion; and a wireless communication circuit configured to transmit and / or receive, via the first array antenna, a wireless signal in a first frequency range. The first conductive portion includes, in a portion corresponding to the first array antenna, a plurality of first slits provided to be spaced apart from each other and to have a length in a first direction perpendicular to a polarization of the first array antenna.

A method for exploiting multi-bounce scattering to increase the field-of-view of millimeter-wave radar imaging without prior environment knowledge is disclosed. The method includes transmitting a radar signal based on a fixed transmit beam pattern and receiving a plurality of reflections of the transmitted radar signal from a plurality of objects in an environment, wherein the reflections may be single-bounce reflections, double-bounce reflections, and triple-bounce reflections. Additionally, the method includes performing a single-bounce matched filtering to localize a first plurality of objects based on the received single-bounce reflection, performing a double-bounce matched filtering to localize a second plurality of objects based on the received double-bounce reflection and the localized first plurality of objects, and performing a triple-bounce matched filtering to localize a third plurality of objects based on the received triple-bounce reflection, the localized first plurality of objects and, the localized second plurality of objects. Further, a map that includes the plurality of objects localized by the single-bounce matched filtering, the double-bounce matched filtering, and the triple-bounce matched filtering is generated.

According to some embodiments, a method is performed by a wireless device for beam prediction in a wireless network. The method comprises receiving beam configuration information for two sets of beams, a beam set A and a beam set B. Beam set B comprises physical beams and beam set A comprises one or more virtual beams. The beam configuration information comprises data indicating a beam pattern for each of the beams in beam Set A and beam Set B and at least physical time / frequency resources for transmission / reception of the physical beams of beam Set B. The method further comprises measuring one or more beams from beam set B and predicting one or more beams from beam set A based on the measurement of the one or more beams from beam set B.

A user equipment (UE) is described. The UE includes receiving circuitry configured to monitor SSBs / PBCHs (synchronization signal blocks / physical broadcast channels) and obtain system information block type 1 (SIB1) information. The receiving circuitry is further configured to receive downlink (DL) control information on a DL reception timeslot pattern indication and to receive DL signals and detect potential data to the UE in indicated timeslots following the DL reception timeslot pattern.

A base station testing system provides, for display, a graphical user interface (GUI) associated with facilitating testing of a base station by the base station testing system. The GUI includes one or more selectable indicators respectively associated with one or more modules of the GUI. The base station testing system obtains, based on providing the GUI, information indicating selection of a selectable indicator that is associated with analysis of beam patterns associated with the base station and thereby identifies a beam pattern analysis module that is associated with the selectable indicator. The base station testing system provides, for display, in a window of the GUI, information associated with the beam pattern analysis module, wherein the information associated with the beam pattern analysis module includes spatial frequency domain beam pattern analysis information associated with the base station.

A base station (gNB) is described. The gNB includes receiving circuitry configured to receive non-terrestrial network (NTN) satellite ephemeris and satellite capabilities information including an antenna set configuration, a number of beams in a coverage area, available power, supported beam group and / or beam pattern type, a maximum number of beam groups and / or beam patterns, and a maximum number of beams in a beam group or beam pattern, a beam stability and beam angle fluctuations. The gNB also includes transmitting circuitry configured to configure the beam groups and / or beam patterns based on the satellite capabilities, and schedule transmissions based on the configured beam groups and / or beam patterns.