304 results about "Radar systems" patented technology

The application discloses a STCA-MIMO radar anti-interference method based on nonlinear time delay, which comprises the following steps: calculating target echo signals based on nonlinear time delay of transmitting array elements; carrying out digital mixing and matching filtering on the target echo signals to obtain preprocessed signals; determining a first transmitting steering vector and a first receiving steering vector according to the preprocessed signals; calculating a covariance matrix of STCA-MIMO radar system receiving data; calculating an adaptive weight vector by using a robust direct data domain beam forming technology based on the covariance matrix and an actual receiving-transmitting joint steering vector of a target; calculating a first receiving-transmitting joint steering vector of the STCA-MIMO radar system; and carrying out beam forming by using the first receiving-transmitting joint steering vector and the adaptive weight vector. The application can effectively suppress interference signals in the main lobe of the STCA-MIMO radar, and solves the problem of the decline of interference suppression performance in the prior art when the interference is located near the distance grating lobe of the main lobe of the real target.

The application discloses a method for sidelobe suppression of single-bit quantization Chirp signal, and the main technical content of the method comprises sidelobe suppression of single-bit quantization Chirp signal based on a convolution window function. The technical content performs sidelobe suppression through the following steps: step S1, generating a Chirp echo signal; step S2, single-bit quantization of the Chirp signal; step S3, single-bit quantization of a Chirp signal matching filter and adding a convolution window; and step S4, pulse compression of the single-bit quantization Chirp signal. The application can achieve a good compromise between quantization order and pulse compression effect, single-bit quantization can reduce quantization complexity to the maximum extent, and the sidelobe suppression method based on the convolution window function can effectively solve the problem of the decrease of the main sidelobe ratio caused by single-bit quantization. For Chirp signals and other radar signals with large time-bandwidth product, the application can improve the pulse compression effect, improve the range resolution of the radar system, and has certain reference significance for improved design in radar engineering technology.

A radar calibration device for calibrating a radar system installed on a vehicle, is provided by the present disclosure. The radar system comprises a radar module and a radar control unit configured to receive a first signal output by the vehicle. The radar calibration device comprises a memory storing a configuration software. The radar calibration device also comprises a signal calibration unit providing information. The radar calibration device also comprises a processor coupled to the memory, the signal calibration unit and the radar control unit and configured to executing the configuration software. The processor calibrates the first signal to a second signal based on the information.

This disclosure relates to the field of automotive technology, and more specifically, to an in-vehicle lidar system and a vehicle. The in-vehicle lidar system includes a signal processing module and a lidar module mounted on the vehicle. An electrical connection exists between a first interface of the lidar module and a second interface of the signal processing module. The lidar module is used to transmit raw radar signals acquired from the system to the signal processing module via the electrical connection; the signal processing module is used to process the received raw radar signals.

Improved method for simultaneous localization and mapping; associated computer system and program. This method, performed by a computer (40) mounted on board a vehicle (1), consists of: acquiring a set of points at the current time, provided by a Doppler radar system (30) of the vehicle; acquiring the attitude at the current time of the vehicle, provided by an inertial measurement unit (20) of the vehicle; orienting the set of points at the current time with respect to a ground reference frame (X0Y0Z0), taking into account the attitude at the current time; processing the radial velocities of the points to calculate an estimated velocity at the current time of the vehicle (1); calculating a position at the current time of the vehicle (1) from the estimated velocity at the current time; and executing a simultaneous localization and mapping algorithm from the position at the current time of the vehicle over a plurality of successive times. Figure for the abstract: Figure 1

Even when multiple individuals are present in the monitoring area, the system efficiently monitors individuals and their biometric information or status. [Solution] The person analysis system comprises a radar device installed in the monitoring area at least once and outputting observation data including the results of observing the monitoring area using a radar system, and a person analysis device that performs the following based on the observation data: detecting the location of each of the multiple people present in the monitoring area and estimating the vital signs of each of the detected multiple people, and displays an area map corresponding to the monitoring area on a predetermined display device, displays pictograms at each of the detected multiple people on the area map, and displays information regarding the vital signs or behavior of a representative person among the multiple people.

The application relates to the technical field of radars, in particular to a radar working mode small sample identification method based on a multi-modal model independent meta-learning, which comprises the following steps: simulating multiple radar working mode waveforms to extract corresponding pulse description word sequences and taking the pulse description word sequences as small sample tasks; converting the pulse description word sequences into multi-channel feature images and extracting sequence features and image features; mapping the sequence features and the image features to a shared feature space and obtaining fused features through weighted fusion; based on the fused features, training an initial multi-modal double-flow model independent network on the small sample tasks by adopting a model independent meta-learning framework to obtain a trained multi-modal double-flow model independent network; and classifying the working modes of query samples by using the trained multi-modal double-flow model independent network. The method can improve the rapid adaptability and reliability of a radar system in a dynamic electromagnetic environment.

An echo signal processing method, an apparatus, a terminal device, and a computer-readable storage medium for a radar system are provided. The radar system includes scanning channels, each allocated to at least two different scanning channel groups within a scanning cycle. Echo signals received multiple times by a scanning channel are superimposed to generate a superposition result. A crosstalk echo is identified based on the superposition result, for example, by determining that the number of original echoes constituting a superimposed echo is less than a number of activations of the channel, or by comparing a peak value of the superimposed echo to a crosstalk threshold. Upon identification, the crosstalk echo is filtered out to obtain a valid echo for target identification.

An embodiment of this application provides a method for controlling the warning function of an ultrasonic radar system (10), the method comprising: under the steering condition of a vehicle (1), obtaining a first steering curvature K1 of the vehicle (1) using a low-speed steering model, and obtaining a second steering curvature K2 of the vehicle (1) using a high-speed steering model; determining a fused steering curvature K of the vehicle (1) under the steering condition based at least on the first steering curvature K1, the second steering curvature K2, and the vehicle's driving speed V. e At least based on the fusion steering curvature K e The warning distance thresholds for each warning zone of the ultrasonic radar system (10) are adjusted separately. According to this application, false positive and / or false negative warning messages about targets that are prone to occur during vehicle turning can be effectively eliminated in a low-tech manner, thereby improving the user acceptance and user experience of the ultrasonic radar system.

A vehicle system includes a lidar system that obtains an initial point cloud by implementing a first neural network and based on the initial point cloud and obtains a double-density point cloud. The double-density point cloud is produced by reducing a point density of the initial point cloud outside a region of interest (ROI). Processing the double-density point cloud produces detection results that indicate any objects in a field of view (FOV) of the lidar system. A controller obtains the detection results from the lidar system and controls operation of the vehicle based on the detection results.

This invention discloses a radar clutter signal simulation method based on dynamic scene simulation, mainly addressing the problems of low computational efficiency and insufficient flexibility of traditional clutter simulation methods under conditions of large scenes, long time series, and multiple dynamic factors. The implementation scheme includes: constructing a digital simulation scene based on radar signal parameters and dynamic scene information to determine the clutter region to be simulated; discretizing the clutter region into a uniform basic grid in the range-azimuth plane, and then aggregating it into multiple independently processable clutter channels; calculating the amplitude, Doppler frequency, and phase parameters of the center point of each channel in parallel, constructing a two-dimensional convolution kernel reflecting spatial correlation, and using this convolution kernel to efficiently expand the center point parameters to the entire channel, generating a continuously distributed parameter field; and transmitting the parameter fields of each channel to a hardware logic unit to complete signal modulation and synthesis, outputting a high-fidelity radar clutter signal. This invention can achieve rapid, high-fidelity parameter generation from point to field, and significantly improves computational efficiency while strictly maintaining physical accuracy. It can be used for radar system simulation, electronic countermeasures testing, and radar performance evaluation.

This invention discloses a method for suppressing high sidelobes / grating lobes in a wide-area ultra-sparse MIMO radar system, comprising the following steps: (1) Based on a MIMO radar with sparse node distribution, select one set of array elements, each array element transmits orthogonal waveforms to obtain a joint transmit / receive beam pattern; (2) By changing the carrier frequency, obtain joint beam patterns respectively, multiply the obtained beam patterns to obtain an optimized joint beam pattern; (3) Select another set of array elements, repeat steps (1) and (2) to obtain joint beam pattern results under different array configurations; (4) Multiply the joint beam patterns under all array configurations to obtain the final optimized joint beam pattern. By multiplying the carrier agility results of the joint transmit / receive beam patterns obtained from different carrier frequencies of different MIMO radar transmit / receive array configurations, the joint transmit / receive beam pattern optimization is achieved, resulting in a joint transmit / receive beam pattern with lower sidelobes.

The application discloses a single-anchor-node super-resolution positioning method and device, a storage medium and a terminal, and the single-anchor-node super-resolution positioning method comprises the following steps: a frequency control array-multiple-input multiple-output radar system signal model based on disturbance frequency is established; the influence of the disturbance frequency on positioning performance is analyzed, and a design criterion of the disturbance frequency sequence is obtained; an optimization problem is designed, and a super-resolution algorithm is proposed to realize parameter estimation of signal multipath and positioning of a user. Through frequency disturbance of signals between transmitting antennas of the frequency control array-multiple-input multiple-output system, the application releases the coupling between the transmitting angle and the signal propagation distance, so that super-resolution distance and transmitting angle estimation of multipath in the single-anchor-node positioning system become possible. The disturbance frequency design criterion proposed in the application can realize resolution of ambiguous multipath, and the super-resolution parameter estimation algorithm proposed in the application can realize super-resolution estimation of multipath parameters and accurate positioning of a user.

A monitoring system (1) for an orbiting space object (5) comprising a ground-based radar system (2) (7) including an antenna (6) with a controllable pointing direction for moving a space observation window (11) within a field of view (12), the pointing direction having a predetermined value (Zref) associated with the space object (5), the monitoring system (1) comprising ground-based optical sensors (3) (7) and a control unit (4) configured to determine a first orbital restitution (O1) from first positions (P1) of the space object (5) measured by the optical sensors (3), and, if the first orbital restitution (O1) crosses the field of view (12) of the radar system (2) outside the space observation window (11) associated with the predetermined value (Zref) of the pointing direction, to determine a command for the pointing direction of the antenna (6). Abstract figure: Figure 1

An electronic device may include an integrated circuit (IC) including a switch and a plurality of paths that may include a first transmit (Tx) path, a second Tx path, a first receive (Rx) path, and a second Rx path; a first antenna electrically connected with the first Tx path from among the plurality of paths; a second antenna electrically connectable with the second Tx path or the second Rx path from among the plurality of paths via the switch; a third antenna electrically connected with the first Rx path from among the plurality of paths; and at least one processor operably coupled with the IC.

This invention discloses a terahertz-band foreign object detection radar system and method for airport runways. The system includes: a transmitting module for generating and transmitting a 240 GHz frequency-modulated continuous wave detection signal; a receiving module for receiving the echo signal and down-converting it to an intermediate frequency signal; a turntable system for driving the transmitting and receiving modules to rotate synchronously for azimuth scanning; and a digital control and processing module for generating baseband waveforms, acquiring angle information and intermediate frequency signals, and performing data processing to detect and locate foreign objects. This invention utilizes the physical law that the radar cross-section of a target is inversely proportional to the fourth power of its wavelength, fundamentally enhancing the electromagnetic scattering response of small targets and achieving high-sensitivity detection of millimeter-sized metal debris and non-metallic foreign objects, providing a reliable technical solution for foreign object detection on airport runways.

This application relates to the field of radar technology, and discloses a radar chip, a processor chip, a radar system, and an electronic device. The radar chip of this application includes: a first processing module and a first conversion module connected to the first processing module; the first conversion module is used to connect to the processor chip to form a first link; the first processing module is used to connect to the processor chip to form a second link; the first conversion module is used to obtain service data from the first processing module and transmit the service data to the processor chip through the first link; the first processing module is used to receive control signals from the processor chip through the second link; thereby taking into account the chip's PPA performance, power consumption, area, and data integrity.

This invention discloses an integrated structure and method for a time-domain pulse source and antenna, belonging to the field of radar and radio frequency technology. It includes a housing containing a circuit board with an integrated pulse generation module and a matching optimization module. An antenna radiation module is also housed within the housing and connected to the radio frequency output terminal on the circuit board via an extremely short radio frequency feed structure. The matching optimization module acquires the excitation waveform from the pulse generation module and the radiation waveform from the antenna radiation module, and adjusts the pulse parameters of the pulse generation module or the structural parameters of the antenna radiation module to achieve integrated matching of the pulse source and antenna. This integrated structure and method for a time-domain pulse source and antenna solves the problem of decreased detection accuracy caused by signal tailing in ultra-wideband time-domain radar systems through joint optimization design of the pulse source and antenna, and is suitable for high-resolution, high-real-time anti-UAV detection and identification systems.

This document describes techniques and systems for radar-based gesture-recognition with context-sensitive gating and other context-sensitive controls. Sensor data from a proximity sensor and / or a movement sensor produces a context of a user equipment. The techniques and systems enable the user equipment to recognize contexts when a radar system can be unreliable and should not be used for gesture-recognition, enabling the user equipment to automatically disable or “gate” the output from the radar system according to context. The user equipment prevents the radar system from transitioning to a high-power state to perform gesture-recognition in contexts where radar data detected by the radar system is likely due to unintentional input. By so doing, the techniques conserve power, improve accuracy, or reduce latency relative to many common techniques and systems for radar-based gesture-recognition.

Radiofrequency systems for use in advanced driver assistance systems (ADAS) can include a mixture of high frequency (e.g., above 1 GHz) analog and components and lower-frequency digital devices mounted on one main circuit board. Cost savings can be achieved by providing high-frequency signal paths on an interposer circuit board that is mounted to the main circuit board and couples devices requiring high-frequency signalling (e.g., distributing a local oscillator signal to several devices forming part of a cascaded radar system). The interposer is fabricated from special purpose materials suitable for routing high frequency signals with low loss, while the main circuit board can be fabricated from commodity materials suitable for lower frequency applications.

A kind of automobile door safety opening device, including electric control damping mechanism, cam type connecting piece, electric control unit, electric control damping mechanism is hydraulic damping system, it is installed on the door frame of automobile, it is composed of shell, push rod, piston one, piston two, return spring, two flow limiting plates with same through hole, two flow limiting plates are located between piston one and piston two, and it is filled with hydraulic oil between piston one and piston two;Cam type connecting piece is fixedly connected with automobile door hinge.The beneficial effects of the utility model are: when the person in the car gets off, triggers door lock inductor, control unit enables radar system to monitor the situation around the vehicle, if it is monitored that there is no obstacle beside the vehicle, the person in the car can normally open and close the door, if it is monitored that there is obstacle beside the vehicle, control unit drives motor to rotate, adjusts the damping strength of electric control damping mechanism, and the situation of " door kill " can be effectively avoided.

This application provides a frequency-modulated continuous wave lidar system and a lidar-based target detection method. The system includes a transmitting unit, a receiving unit, a temperature sensor, and a controller unit. The transmitting unit includes a laser for transmitting a detection light signal to a detection area. The receiving unit receives reflected light signals from a target within the detection area, beats the reflected light signals with a local oscillator signal to obtain a beat frequency signal, and sends the beat frequency signal to the controller unit. The temperature sensor monitors the real-time temperature of the transmitting unit. The controller unit acquires sensor data from the temperature sensor, obtains the real-time temperature of the transmitting unit based on the sensor data, performs temperature compensation on the modulation bandwidth of the laser based on the real-time temperature of the transmitting unit, and analyzes the beat frequency signal according to the temperature-compensated modulation bandwidth to obtain parameter information of specified parameters of the target.

An unmanned aerial vehicle includes a control station for controlling a first co-operating unmanned aerial vehicle, a radar system or ground based radar system configured to scan for objects within a detection coverage range and to provide scan data indicative of objects detected within the coverage range, and processing circuitry configured to generate full data type radar plots based on obtained scan data, select irregular type radar plots from full data type radar plots, generate and store one or more UAV object tracks, receive telemetric data and / or transponder data for said first UAV, determine for each UAV object track whether there is a match between data of the UAV object track and corresponding telemetric data and / or transponder data for said first UAV, and classify the UAV of a UAV object track as a first co-operating UAV when predetermined matching conditions are fulfilled.

The specification provides a radar signal based polarization cancellation anti-interference method and system, and relates to the technical field of radar signal processing. The method comprises determining a main polarization channel and an auxiliary channel of a subarray antenna, the main polarization channel and the auxiliary channel being orthogonal to each other; acquiring input signals of the main polarization channel and the auxiliary channel; determining an interference signal weight coefficient of the auxiliary channel by calculating noise variance of the first matrix; and polarizing and canceling interference signals of the second matrix according to the first matrix and the interference signal weight coefficient of the auxiliary channel. The method can cancel interference signals in the main polarization channel to obtain low-interference or no-interference output signals, thereby improving the signal-to-noise ratio of the radar system and facilitating subsequent radar signal processing detection. Moreover, the polarization cancellation interference method is suitable for radar systems under a dual-polarization array antenna, and has the advantage of strong applicability.

The application discloses a kind of ground-based radar multi-resource adaptive joint scheduling methods for high-speed target, first in noise and clutter background, ground-based radar system receives and carries out signal processing to the echo in detection airspace, obtains the plot information of detection airspace, then the plot velocity of each wave position is analyzed, then the wave position that appears cross-range cell walk phenomenon calculates the cross-cell walk energy loss coefficient of high-speed target and constructs multi-resource optimization function, finally the adaptive scheduling result of space-time resource and false alarm probability resource is obtained by using CVX toolbox solution, until the overall target detection process is completed.The method of the application considers the energy loss caused by high-speed target range migration, and combines ground-based radar multi-resource cooperative scheduling, realizes the reasonable use of resources while improving the detection performance, the detection performance of high-speed target in clutter and noise environment is significantly improved, and the adaptive optimization of multi-resource cooperative scheduling is realized.