10 results about "Beamforming algorithm" patented technology

The application discloses an X-band intelligent circular ring array antenna and a control method thereof, and relates to the technical field of radar antennas.The antenna comprises a PCB base plate, a plurality of antenna elements are distributed radially on the front surface of the PCB base plate, the front surface of the PCB base plate is an analog circuit, and the back surface is a digital processing control circuit.The analog circuit comprises a power divider / combiner and a multi-path TR component, and the digital processing control circuit comprises an SPI control interface, a wave control circuit, a power supply and a modulation circuit.The application superimposes the windowed beam forming algorithm and the traditional beam forming superposition processing technology, overcomes the disadvantage that the main and side lobe suppression of the circular ring antenna array is relatively low, greatly reduces the false target false alarm probability, adopts the circular ring array + phased array technology to realize the X-band intelligent antenna, does not need a motor rotating device, adopts full digital beam forming, and has faster scanning speed, higher reliability, various scanning modes, can realize the beam pointing large-angle instantaneous movement, and overcomes the inertia disadvantage of mechanical scanning.

A target detection method according to the present disclosure includes generating a range-velocity map from a radar signal of an MPSK-MIMO FMCW radar, detecting a plurality of target signals including a real target signal and a ghost target signal for a target with respect to a velocity axis, estimating an angle of arrival of the target by applying a Capon beamforming algorithm to a target detection result, configuring a phase sequence by extracting phase values for the plurality of target signals from the range-velocity map and arranging the phase values in descending order of velocity value, and arranging differently a plurality of prediction phase values derived using the angle of arrival according to a preset rule to obtain a plurality of candidate phase sequences, and calculating a correlation coefficient between the phase sequence and the plurality of candidate phase sequences and identifying a real target signal in the range-velocity map.

The application discloses a multi-sound source positioning and imaging method based on sparse representation and variational Bayesian inference, and steps are as follows: (1) an initial sound intensity matrix is generated under low resolution by using a conventional beamforming algorithm to estimate the sound source position; (2) the signal intensity gradient is calculated, the search position is updated along the gradient direction, and the accurate sound source position and high-resolution sound intensity matrix are obtained; (3) a sparse dictionary learning algorithm is used for sparse coding and dictionary update optimization of the high-resolution sound intensity matrix; (4) a variational Bayesian inference model is constructed based on the sparse coefficient, the lower bound of variation is optimized, and the posterior positioning estimation of the multi-sound source is carried out; and (5) the positioning result is fused with the camera image to obtain the visualized position of the sound source. The method realizes high-precision real-time positioning and imaging in a complex sound field by combining low-resolution positioning, gradient optimization, sparse dictionary learning and Bayesian inference, and has high spatial resolution and strong anti-interference capability.

This utility model discloses an audio processing module for an industrial camera with sound field direction analysis, including a microphone array containing at least three asymmetrically distributed directional microphones, configured in the circumferential edge region of the industrial camera housing, for acquiring multi-channel audio signals within the target sound field range; through the setting of high-precision sound field direction, and through a dual-layer asymmetrical microphone array (6 cardioids in the inner ring + 12 supercardioids in the outer ring) and MVDR beamforming algorithm, a 2.5° azimuth resolution is achieved in the 12kHz frequency band, which is 67% higher than that of traditional uniform arrays, and effectively suppresses multipath reflection interference in the industrial environment (positioning error < ±5cm / 3m).

The application relates to the field of intelligent traffic and public safety, and particularly discloses an emergency sound range coverage strategy optimization method and system. The method comprises the following steps: constructing a dynamic three-dimensional acoustic attention domain for a moving target in real time according to a video event and geographic information; based on the attention domain, calculating parameters for driving multiple sound columns to work cooperatively through a beam forming algorithm, so as to focus sound waves in a target area and suppress sound energy in a non-target area; collecting real sound field data for comparison and feedback, and online calibrating driving parameters to ensure coverage effect; when multiple events occur simultaneously, generating a global scheduling strategy through priority evaluation and conflict arbitration, and orderly allocating sound column resources; the system comprises four functionally corresponding modules. The application realizes accurate acoustic tracking and adaptive coverage of a moving target, effectively solves the problems of poor broadcast effect and resource conflict in multiple events in a complex environment, and significantly improves the intelligent level and intervention efficiency of an emergency broadcast system.

The application discloses a kind of physical guidance enhancement and double-flow decoupling unmanned aerial vehicle detection method, comprising: the multichannel original audio signal of the microphone array of unmanned aerial vehicle is collected;The method is output dynamic correction mask by causality invariance adapter, modulate input tensor, enhanced time domain signal can focus on the rotor harmonic and texture details weakened by beamforming process, so as to improve the fidelity of enhancement result;And the dynamic correction mask of causality invariance adapter initial output is constrained, ensure the physical consistency and stability of causality invariance adapter under little parameter quantity;And the difference between the amplitude spectrum of input tensor containing two output signals, so that causality invariance adapter focuses on the amplitude spectrum difference of two output signals, effectively solves the spectral whitening problem caused by traditional beamforming algorithm, significantly restores the high-frequency harmonic and texture details essential for target identification.

This invention discloses a multi-target anti-interference detection system based on holographic staring radar, belonging to the field of holographic staring radar technology. It constructs a technical architecture consisting of four major modules: array calibration, beamforming and optimization, adaptive filtering, and adaptive control. The system ensures beam pointing accuracy through periodic array calibration, effectively suppresses inter-beam interference by employing a minimum sidelobe beamforming algorithm, achieves dynamic suppression of strong near-angle interference by combining spatial-temporal joint filtering, and adaptively optimizes beam parameters using fusion analysis and feedback mechanisms. This significantly improves the system's multi-target detection accuracy and anti-interference capability in complex urban environments, and demonstrates strong stability and practicality.

A phase-reconfigurable reflectarray or reconfigurable intelligent surface (RIS) is disclosed. The reflectarray or RIS includes a plurality of reflectors, wherein each reflector includes an antenna element in communication with a microwave circuit. The microwave circuit includes a fixed time delay element and an electronically controllable phase shifter. The time delay associated with each reflector is fixed, but the time delays vary across the reflectarray. In this way, the fixed time delay elements create a virtual surface, which may be any desired shape, such as a parabolic reflector, a spherical reflector, hyperbolic reflector, or a parabolic cylinder. Additionally, the reflectarray employs a beamforming algorithm to control the phase introduced by each phase shifter so as to maximize the desired signal and suppress interfering signals.

A non-contact method for monitoring the icing state of wind turbine blades includes: acquiring wind turbine images; conducting noise tests on the wind turbine rotor composed of iced blades to obtain the wind turbine noise signal under icing conditions; processing the wind turbine noise signal using an eigenvalue-optimized beamforming algorithm to obtain sound pressure level spectral characteristics; acquiring noise sources based on the wind turbine images and identifying the coordinates of the maximum noise source, establishing the relationship between the noise source and different icing states in non-icing locations; constructing a positive relationship between icing states at different locations, with different masses, and with different incoming flow angles of attack, and the increase in the total sound pressure level of the wind turbine; inputting the positive relationship into a BP neural network model and a local linear wavelet neural network model respectively to obtain monitoring results. This invention utilizes acoustic array technology to achieve non-contact measurement of horizontal axis iced wind turbine noise and thus monitor its icing state, realizing the monitoring of wind turbine blade noise under different icing states.

This invention provides a novel millimeter-wave network radio, comprising: an radome, a radio frequency (RF) front-end, a chassis, a local oscillator module, a power supply, and a baseband processing unit. The radome is located at the top of the millimeter-wave radio, the power supply and baseband processing unit at the bottom, and the RF front-end between the radome and the chassis. The local oscillator module is located between the power supply and baseband processing unit and the chassis, which is located in the middle of the millimeter-wave radio. This invention employs phased array technology to achieve rapid antenna beam scanning and alignment, enabling rapid directional communication. Unlike the omnidirectional antennas used in traditional radios, this technology improves the antenna's directional gain, offsetting signal attenuation in the millimeter-wave band and thus increasing communication distance. This invention features a miniaturized design, employing highly integrated multi-channel transceiver chips to achieve a miniaturized tile-type T / R component design, reducing the size of the millimeter-wave radio. This invention also utilizes broadband communication algorithms and beamforming algorithms.