441 results about "Beam direction" patented technology

The invention relates to a hearing aid intelligent noise reduction and human voice enhancement system based on electroencephalogram signals, and belongs to the field of biomedical engineering and acoustic signal processing. The system comprises an electroencephalogram signal acquisition module, a multi-channel acoustic sensor array, an embedded neural signal processor, an adaptive beam forming module, a dynamic speech enhancement engine and a dual-mode output device, and constructs electroencephalogram-acoustics joint features by extracting an alpha / theta wave power ratio, a P300 component and auditory cortical Gamma phase synchronism. A deep network is driven to separate target voice, a wave beam direction and a frequency response curve are dynamically adjusted based on neural feedback, a closed-loop calibration unit is innovatively adopted, gain is reversely adjusted according to N1-P2 wave amplitude, heart rate variability and eye movement data are fused to optimize decisions, and when the signal-to-noise ratio is-5dB, the voice recognition rate reaches 89%, the auditory fatigue is reduced by 37%, and the decision conflict rate is smaller than 6%. The defects of attention blind area, noise separation failure and physiological adaptation of a traditional hearing aid are overcome. The system is suitable for the fields of hearing impairment rehabilitation, special communication and intelligent cabins.

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

The invention discloses a phased array weather radar calibration method based on a generalized metal ball calibration theory. Comprising the following steps: in a microwave anechoic chamber, collecting two-dimensional antenna pattern data of a phased array weather radar in at least one working mode and pointing to a plurality of different beams; performing numerical integration on the two-dimensional antenna pattern data, calculating a combined beam main lobe solid angle of the transmitting antenna and the receiving antenna, and calculating an equivalent beam width product; calculating a calibration theoretical reflectivity factor of the metal ball based on the product of the theoretical radar scattering sectional area and the equivalent beam width of the metal ball; actual detection echo data of the phased array radar on the metal ball under different working modes and beam pointing is acquired, and an actual reflectivity factor is calculated; and comparing the actual reflectivity factor with the calibration theoretical reflectivity factor to complete calibration of the phased array weather radar. Aiming at the non-Gaussian working mode of the phased array weather radar, the reflectivity factor of the phased array weather radar can be quantitatively evaluated, and the radar detection performance is improved.

The invention relates to the field of low-altitude communication network planning methods, in particular to a 5G three-dimensional coverage and capacity planning design method for low-altitude economy, which comprises the following steps: performing airspace range limitation and application scene division on a target airspace, establishing a mobile model of a low-altitude terminal, and providing dynamic input for simulation; the method comprises the following steps: establishing a dual-frequency heterogeneous network, and determining base station addresses covering targets at different heights and meeting different signal station spacing; performing three-dimensional coverage and quality simulation on the established dual-frequency heterogeneous network, performing network KPI evaluation on the simulation until the standard is reached, and outputting a network deployment planning scheme; deploying according to a network deployment planning scheme, predicting low-altitude service flow, and adjusting a beam direction and a PRB reservation ratio to realize on-demand allocation of resources; and carrying out actual measurement on the deployed network, collecting an air measurement index, comparing a comparison deviation between the air measurement index and a simulation result, and carrying out fine adjustment on the network according to the comparison deviation. According to the invention, diversified communication requirements are met, and the success rate of terminal access is improved.

The invention relates to a space coupling wind measurement laser radar real-time processing method. The method comprises the following steps of performing quality inspection and data preprocessing on acquired power spectrum data; carrying out radial speed extraction on the power spectrums of the plurality of beam directions and the plurality of range gates; constructing a space coupling constraint based on the space continuity of the atmospheric wind field and the geometric law of vector projection; solving a global objective function containing a data fitting item and a spatial constraint item through a joint optimization algorithm to obtain optimal wind field estimation; and outputting the three-dimensional wind field and performing quality evaluation. According to the method, the coupling relationship between different spatial position measurement values is established by using spatial redundant information obtained by multi-beam scanning of the wind measurement laser radar, the wind field inversion precision is improved through a global optimization method, the abnormal value suppression capability is enhanced, and the spatial continuity of an inversion result is ensured.

The invention discloses an ultrahigh-frequency radio frequency tableware batch identification and transaction control system based on artificial intelligence, and the system comprises a tableware radio frequency tag module which is used for embedding an ultrahigh-frequency RFID tag in a tableware body; the radio frequency reading and signal acquisition module is used for outputting structured data records; the artificial intelligence identification and error correction module is used for generating a credible tableware identifier set and a state feature set; the array antenna control module is used for dynamically adjusting a beam direction angle and a transmitting power parameter value of the array antenna; the edge computing transaction processing module is used for inputting the trusted tableware identifier set into an edge computing transaction processing flow and executing repeated charging risk verification; the payment control module is used for returning a payment result; and the background management and tracking module is used for generating operation statistics and abnormal record entries. The system has high-precision tableware identification, low-delay settlement and abnormity prevention and control capabilities, and is suitable for automatic identification and intelligent settlement management of batch tableware in a catering scene.

The invention discloses an AR light machine and a near-to-eye display device, and relates to the technical field of AR optics. The illumination light path comprises a collimating lens, a compound eye, a first lens and a diffusion sheet which are tightly arranged in sequence along a light beam emitted by the light source; the imaging light path comprises a balsaming lens group, a polarization splitting prism, a reflector and a second lens in contact with the light-emitting surface of the polarization splitting prism, wherein the balsaming lens group, the polarization splitting prism and the reflector are tightly arranged in sequence in the direction of the light beam reflected by the LCOS. The lenses are tightly arranged, and in the illumination light path, light beams passing through the diffusion sheet sequentially enter a polarization splitting prism and a bonding lens group in the imaging light path, so that multiplexing of the polarization splitting prism and the bonding lens group is realized; in addition, in the imaging light path, through a folding structure of a polarization splitting prism, the size of the AR light machine is reduced; in addition, the LCOS is small in size. In conclusion, the volume of the AR light machine provided by the invention can be 30% of that of a traditional AR light machine, and miniaturization of the AR light machine is realized.

The invention discloses a non-contact method for measuring a three-dimensional flow velocity field in a pipeline based on acoustic Doppler, and the method comprises the steps: transmitting a focused sound beam into the pipeline, receiving an echo signal reflected by a scatterer in fluid, and generating a Doppler echo signal set covering different angles and depth positions; performing pulse compression and time-frequency analysis on the Doppler echo signal set, and calculating the sight flow velocity component of each point along the sound beam direction; calculating a three-dimensional flow velocity vector of each sampling point based on the coordinate position of each space sampling point and the corresponding sight line flow velocity component, and realizing decoupling of the flow velocity direction and size; according to the spatial distribution of the three-dimensional flow velocity vector on the section of the pipeline, a three-dimensional flow velocity field model in the pipeline is generated through interpolation fitting, and section flow and flow state characteristic parameters are calculated according to the model. According to the embodiment of the invention, the limitation that only two-dimensional or one-dimensional flow velocity can be measured in a traditional method can be broken through, and the spatial resolution and measurement precision of flow velocity field reconstruction in a complex flow state are improved.

The invention discloses a beam guidance optimization method based on position prediction in unmanned aerial vehicle communication, and relates to the technical field of unmanned aerial vehicle communication optimization, and the method comprises the steps: obtaining the flight path data of an unmanned aerial vehicle, carrying out the adaptive segmentation according to the flight path data, and constructing a state evolution model for each flight path; performing short-term prediction and medium-term residual error calibration prediction according to the state evolution model, and constructing a prediction correction term to generate a prediction point set; mapping the prediction point set to a direction coordinate system of a ground communication array to construct an angle evolution tensor, and screening to obtain a candidate beam direction set; and screening a standby beam direction with the maximum path coverage redundancy from the candidate beam direction set. According to the method, a beam guiding optimization mechanism with state identification, adaptive prediction, space tolerance, historical correction and multi-path dynamic regulation and control capabilities can be realized, and the beam control precision, the failure recovery capability and the communication link stability in a complex airspace motion state during communication of the unmanned aerial vehicle are remarkably improved.

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 provides a composite light spot laser processing head and a processing method, and belongs to the technical field of laser processing. The composite light spot laser processing head comprises a light source, a collimating lens, a light splitting cone lens and a multi-curvature focus lens, the light source, the collimating lens, the light splitting cone lens and the multi-curvature focus lens are sequentially arranged in the direction of a light beam emitted by the light source, a center hole is formed in the center of the light splitting cone lens, and a light incident surface of the multi-curvature focus lens is a convex aspheric cambered surface. The aspheric cambered surface comprises a first mirror surface area and a second mirror surface area which are arranged from inside to outside in the radial direction, and the mirror surface curvature of the first mirror surface area is smaller than that of the second mirror surface area. By the adoption of the composite light spot laser processing head, point-ring composite light spots can be stably generated, meanwhile, the structural complexity and the manufacturing cost are reduced, and structural miniaturization and improvement of scene use adaptability are achieved.

The invention relates to a continuous zoom cycle-scan television system based on a zoom collimation scanning field lens structure and application thereof. Light reflected by a target image horizontally passes through the focusing group, the zooming group, the compensation group and the collimating field lens group in sequence along an optical axis, is obliquely reflected by 45 degrees by the galvanometer group and then vertically passes through the fixed group, is obliquely reflected by 45 degrees by the reflector group again and then horizontally passes through the optical filter switching group leftwards, and finally is imaged on a detector photosensitive surface of the high-definition imaging module; and the high-definition imaging module carries out photoelectric conversion and image processing and then outputs a high-definition video or image. According to the invention, the problem that the image quality is reduced during the swing scanning of the peripheral scanning television is solved, the turn-back of the light path is realized through the cooperation between the galvanometer group and the reflector group, and the galvanometer group rapidly swings the reflector to control the direction of the light beam to realize image motion compensation, so that the peripheral scanning detection function is realized. The system can be used for panoramic dead-corner-free monitoring and detailed reconnaissance of key targets, and is widely applied to the fields of intelligent monitoring, military reconnaissance, automatic driving and the like.

The invention provides a leaky-wave antenna and a frequency-modulated continuous wave generation method based on the leaky-wave antenna, and relates to the field of millimeter-wave radar, and the method comprises the steps: constructing a space-time coding matrix, configuring a radiation unit state regulation and control beam direction in a space domain, modulating a radiation unit state switching rule in a time domain to generate a frequency-modulated continuous wave, and achieving space-time dual-domain regulation and control. And frequency-modulated continuous waves with controllable bandwidth are generated. The space-time coding leaky-wave antenna is formed by alternately arranging 1-bit radiation units in an upper row and a lower row, switching of radiation / non-radiation states is achieved by loading a synchronous bias PIN diode across an annular gap, a space-time coding matrix is constructed, the states of the radiation units are configured in a space domain to regulate and control the wave beam direction, and the space-time coding leaky-wave antenna is formed. Modulating the switching rule of the radiation unit in a time domain, and generating a frequency-modulated continuous wave; the radiation efficiency is improved by the alternative arrangement of the radiation units, the control difficulty and the hardware cost are reduced, multiple functions are integrated into a single device, and the problem of low integration level of the traditional separation architecture is solved.

A photonic assembly includes: a composite die including a photonic integrated circuits (PIC) die and an electronic integrated circuits (EIC) die, the PIC die including waveguides and photonic devices therein, and the EIC die including semiconductor devices therein; an optical connector unit including a first connector-side mirror reflector and a first transition edge coupler and attached to a top surface of the composite die, wherein the first connector-side mirror reflector is configured to change a beam direction between a vertically-extending beam path through the composite die and a horizontally-extending beam path through the first transition edge coupler; and a fiber array units assembly attached to a sidewall of the optical connector unit.

The invention relates to the technical field of computer graphics, sensor simulation and real-time rendering, in particular to a panoramic laser radar simulation method and system based on a single GPU calculation shader, and the method comprises the steps: receiving simulation parameters of a laser radar sensor, assembling the simulation parameters into a constant buffer area object, and carrying out the simulation of the laser radar sensor on the constant buffer area object; the method comprises the following steps: allocating a structured point cloud buffer area and binding shader resources in a rendering dependency graph framework, scheduling and calculating a shader to generate a two-dimensional thread index, calculating a light beam direction vector corresponding to each thread and constructing a ray descriptor based on the two-dimensional thread index, and obtaining hit information; the method comprises the steps of calculating echo intensity based on hit information according to a preset intensity model, simulating noise, writing point cloud attributes into a structured point cloud buffer area, and asynchronously looking back point cloud data for consumption through the structured point cloud buffer area. And the throughput and the data consistency are improved.

The invention relates to the technical field of intelligent building lighting control, in particular to a building lighting self-adaptive regulation and control system based on multi-source perception, which comprises a multi-source environment data acquisition module, a user interaction feedback acquisition module, a double-path light environment demand prediction network and a lighting parameter generation and execution unit control module. According to the system, internal and external environment perception and user preference are fused, a deep time sequence convolutional network and a graph attention mechanism are combined to predict illumination requirements, and brightness, color temperature and light beam direction are cooperatively adjusted. According to the invention, high-precision and closed-loop self-adaptive regulation and control can be realized, the energy consumption is obviously reduced, and the user satisfaction is improved.

The invention discloses a fast beam tracking method and system for a high-dynamic group, and belongs to the technical field of wireless communication. The method comprises the steps that a base station obtains initial angle information of a terminal through a spectrum estimation method; the two auxiliary wave beam pairs are used for sending signals, the terminal measures the receiving power and calculates the power ratio, and an actual physical angle is obtained through inverse solution; taking the angle as an observed quantity of an extended Kalman filter, and realizing dynamic beam direction estimation through state prediction and correction; monitoring the received power in real time to perform beam misalignment judgment, and triggering reinitialization if the received power is misaligned; and inputting an angle estimation residual error output by the extended Kalman filter into the long short-term memory network, and performing residual error modeling and prediction compensation on an estimation result. The system comprises corresponding modules for implementing the steps. The method combines the auxiliary beam pair, the extended Kalman filter and the long short-term memory network, improves the beam tracking precision and robustness, and is suitable for high-speed moving scenes such as an unmanned aerial vehicle group.

A first network node may be configured to transmit a configuration of a set of resources for at least one sensing signal. Each of the set of resources is associated with at least one of an incident beam direction angle of a wireless device or a reflection beam direction angle of the wireless device. The wireless device may be configured to receive the configuration of the set of resources for the at least one sensing signal. The wireless device may be configured to transmit an indication of at least one frequency-domain compensation factor for each of the set of resources based on the configuration. The first network node may be configured to transmit the at least one sensing signal based on the configuration of the set of resources. The wireless device may be configured to receive and forward the at least one sensing signal based on the set of resources.

The invention relates to the technical field of intelligent sensing systems, in particular to a radar water level monitoring application inclination angle installation algorithm and device, and the method comprises the following steps: collecting radar emission and echo signals, converting oblique distance measurement, and synchronously obtaining accelerometer and gyroscope attitude information to form inclination angle constraint; the method comprises the following steps: correcting a wave beam direction according to an attitude, decomposing a space geometrical relationship, solving a real intersection point position of a radar and a water surface, extracting the vertical height of an intersection point, combining with an installation reference to complete water level conversion, introducing a time sequence prediction and residual error updating mechanism, and enabling a water level result to be stable and consistent in continuous observation. By introducing attitude angle calculation and inclination angle correction means and combining data of an accelerometer and a gyroscope, a pitch angle and a roll angle are obtained, an inclination angle attitude vector is formed, an oblique distance measurement result is corrected, a wave beam direction is corrected, a vertical component is decomposed, a water level is calculated, attitude change self-adaptive correction is achieved, and manual errors are reduced.

A wireless communication device includes an antenna array with multiple antenna elements, an array of power amplifiers, and an array of phase shifters. Each antenna element is coupled to a power amplifier and a phase shifter. The device also includes transmitter circuitry coupled to the antenna array to encode a constant amplitude signal, which includes a power amplifier enable code to indicate which power amplifiers are to run in a subsequent data sample and a beam direction code to control beam direction of each phase shifter of the array of phase shifters in the subsequent data sample. The constant amplitude signal is then provided to the array of antenna elements and amplitude and phase modulation is combined over an air interface into a composite modulated signal.

The invention provides a spectrum allocation method and device, a storage medium and equipment, and relates to the technical field of communication, and the method comprises the steps: obtaining the positions of an air platform and ground network equipment, obtaining the beam directions of the air platform and the ground network equipment, and carrying out the spectrum allocation based on the positions of the air platform and the ground network equipment; according to the method, the first beam of the air platform and the second beam overlapped with the first beam on the ground network equipment can be determined according to the beam direction of the air platform and the beam direction of the ground network equipment, so that spectrum conflicts can be prevented and interference can be reduced by allocating non-overlapped spectrums for the first beam and the second beam.

A rapid-deployment satellite communications (satcom) terminal apparatus includes a base capable of rotation relative to a platform (e.g., a mobile platform or trailer to which the apparatus may be mounted or from which it may be detached), and a passive planar array panel comprising an array of antenna elements or apertures, the passive planar array panel pivotably and slidably attached to the base. The passive planar array panel includes a feed arm and feed antenna, the arm articulable relative to the panel and the antenna articulable relative to the arm. The feed antenna transmits and / or receives EM energy focused by the antenna elements in a beam direction adjustable by an array controller to a desired azimuth and elevation via electromechanical adjustment of, respectively, the rotational orientation of the base and the slant angle of the passive planar array panel relative to the platform.

Provided in the present application are an antenna, a communication device and a communication system. The antenna comprises a reflection plate and an adjustment device. The adjustment device is connected to the reflection plate, and is configured to drive the reflection plate to rotate, so as to adjust the orientation of a radiation beam from an element on the reflection plate. The adjustment device comprises a first driving mechanism, a first rotating member, a second driving mechanism and a second rotating member. The first rotating member and the second rotating member are coaxially arranged along a first rotating shaft, the first driving mechanism drives the first rotating member to rotate around the first rotating shaft, and the second driving mechanism drives the second rotating member to rotate around the first rotating shaft. When the adjustment device is in a first operating state, the first driving mechanism drives the first rotating member to rotate around the first rotating shaft in a first direction, the second driving mechanism drives the second rotating member to rotate around the first rotating shaft in a second direction, and the first direction is opposite to the second direction, such that clearances between structures can be eliminated, and the reflection plate is then stably and precisely kept in a preset position, thereby enhancing the stability and precision of the beam direction of the antenna.

An antenna system for beam direction adjustment and shared use of radio-frequency integrated circuit (RFIC) units includes an array antenna module including feed antenna units for producing at least one input signal, RFIC units respectively electrically connected to the feed antenna units through switching units and less in number than the feed antenna units, a control module for controlling, based on at least one antenna configuration message, some of the switching units to be switched on and the rest thereof to be switched off, and a microwave lens module for forming at least one beam in a particular direction. A feed antenna unit electrically connected to the switched-on switching unit is in a working state, and can receive a signal from the RFIC units and radiate a corresponding input signal to the microwave lens module. The antenna system greatly reduces the number of RFIC units, thereby lowering the overall cost.

The invention discloses a radar liquid level calibration, calibration, compensation and blind area mapping method and system based on a baffle plate, and belongs to the technical field of liquid level measurement. The method comprises the following steps of: firstly, performing interval calibration on a radar measurement value according to a real distance between baffle plates under an empty tank condition, and determining a zero point by taking the first baffle plate as a reference; secondly, under the conditions of normal temperature and normal pressure, the positions of the shielding plates are calibrated by combining a sine dip angle error generated by the fact that a wave guide tube is not parallel to the wave beam direction, and calibration parameters are obtained; thirdly, under the actual working condition, according to the corresponding relation between the measured value and the actual value of the known waveguide section above the liquid level, deducing the actual propagation speed of the electromagnetic wave in the gas, and compensating the liquid level measurement result according to the actual propagation speed; finally, by means of the coupling relation between the shielding plate below the liquid level and the liquid level, the mapping of the liquid level blind area is achieved by analyzing the proportional relation generated by the measurement value of the shielding plate along with the change of the liquid level. The precision and reliability of radar liquid level measurement can be effectively improved under the complex working condition, and the measurement defect caused by a blind area is overcome.

The application relates to an exposure system for exposing a three-dimensional structure on a workpiece, the exposure system is sequentially provided with a laser for emitting a laser beam, a beam expander for zooming and expanding the spot of the laser beam, an aperture for limiting the laser beam, a galvanometer for deflecting the direction of the laser beam, and a field lens group for ensuring the vertical emission of the laser beam along the advancing direction of the laser beam, the galvanometer comprises a reflecting sheet for reflecting the laser beam, the reflecting sheet can be rotated to expand the range of the laser beam emission, the range of the laser beam emission is 3mm*3mm-15mm*15mm, the exposure system can form a three-dimensional structure on the workpiece under the action of the aperture, the reflecting sheet in the galvanometer can be rotated to expand the range of the laser beam emission, so that the workpiece and the exposure system can expose multiple units without relative movement, and the exposure rate and the workpiece processing efficiency are greatly improved.

A wireless device is configured to transmit radar signals at extremely low spectral density so that the receiver can be operated at the same time without saturating and thereby enabling full-duplex operation. To achieve sufficient range, beamforming is used together with a very long correlation time for detection of the radar signal, in which case the receiver can resolve backscattered or reflected radar signals far below the noise floor, while the bandwidth of the transmitted radar signal can be very high. The wide bandwidth enables the wireless device to maintain a low power spectral density while increasing output power, and also increase the depth resolution. The extremely low power spectral density even in the transmission beam direction makes the probability that communication will be disturbed very low. The high bandwidth calls for digital filters for both transmitted and received signals to equalize the radar frequency response characteristics of the radio unit.

The invention provides a standing wave acceleration structure and an acceleration device. The standing wave acceleration structure comprises a light velocity section and a bunching section. The light velocity section comprises a plurality of light velocity cavities which are distributed in the axial direction of the light velocity section and are sequentially communicated. The bunching section comprises a bunching cavity and an entrance port, the bunching section is arranged at the upstream of the light velocity section along the electron beam direction, the entrance port is communicated with the bunching cavity, and the bunching cavity is communicated with the light velocity cavity at the most upstream. Wherein an accelerating electric field in the axial direction of the light velocity section is formed in the light velocity cavity, the phase of electrons entering the light velocity cavity is ahead of the maximum accelerating phase of the accelerating electric field, and the phase of the electrons after acceleration does not exceed the phase corresponding to the maximum value of the electric field intensity of the accelerating electric field. According to the acceleration structure provided by the embodiment of the invention, the energy dispersion of the electron beam can be reduced by adopting a sliding phase method, so that a smaller focus size can be obtained during subsequent quadrupole magnet focusing, the spatial resolution of the acceleration device is improved, and a better effect is achieved during fine defect detection.

The present application provides a communication method and apparatus. The method comprises: a network apparatus sends first configuration information to a coordinating node, sends second configuration information to a terminal apparatus, and determines sensing data. The first configuration information is used for configuring at least one first beam corresponding to a first time unit, the first beam is used for receiving and / or sending a signal between the coordinating node and the terminal apparatus, and the coordinating node comprises a relay device or an RIS. The second configuration information is used for configuring at least one first beam corresponding to a first time unit. The sensing data is determined on the basis of the signal received from the first beam. In the method, on the basis of a beam direction where a coordinating node sends and / or receives a signal, a network apparatus can configure, for a terminal apparatus, a beam direction where a signal is sent and / or received, so that the terminal apparatus can receive a sensing signal from the network apparatus as much as possible, thereby implementing sensing.

The invention provides an unmanned aerial vehicle direction finding system and method based on electronic beam scanning, and the system comprises a beam scanning antenna which works in a receiving mode and is used for receiving an unmanned aerial vehicle radio frequency signal in a preset airspace, and transmitting the unmanned aerial vehicle radio frequency signal to a frequency spectrum feature analysis module; the beam pointing controller is used for controlling the phase distribution of the beam scanning antenna and realizing the adjustment of the main beam direction; the spectrum feature analysis module is used for performing real-time spectrum analysis on the received unmanned aerial vehicle radio frequency signal and sending an analysis result to the intelligent control unit; and the intelligent control unit is used for controlling the beam pointing controller and the spectrum feature analysis module. According to the technical scheme provided by the invention, the detection, identification and positioning capabilities of the low-altitude safety protection system on the unmanned aerial vehicle target in a complex environment can be improved.