10 results about "Radar systems" patented technology

The invention provides a radio frequency interference suppression method for a high frequency surface wave radar based on tensor subspace projection. Depending on the distance correlation and direction characteristics of radio frequency interference, joint estimation is performed on a radio frequency interference subspace from multiple dimensions by tensor decomposition. The implementation processcomprises the following steps: performing Doppler sliding window processing based on radar data to finish data segmentation; performing radio frequency interference detection; judging whether interference frequency points exist in a currently-selected data block or not; if radio frequency interference exists, constructing a third-order tensor by using long-distance metadata without sea echo of multiple antenna channels to serve as a training tensor; performing tensor decomposition on the training tensor by using high-order singular value decomposition; estimating a radio frequency interference subspace; and performing distance sliding window and subspace projection processing to obtain data without radio frequency interference. The method can suppress radio frequency interference to a great extent, improve data quality and retain a target signal completely, has a good application effect, improves the detection performance of a radar system, and has important practical application value.

The invention provides a laser radar transmitting system, and belongs to the technical field of laser radar systems. The laser radar transmitting system comprises a laser light source, a collimating optical device arranged on an emergent light path of the laser light source and used for forming a collimating light beam, an adjustable support used for fixedly installing the laser light source and the collimating optical device, a fixed support fixed on a laser radar shell and used for installing the adjustable support, and adjusting components used for adjusting a swing position of the adjustable support relative to the fixed support, wherein the adjustable support can swing in a direction perpendicular to the light path of the collimating light beam relative to the fixed support. Accordingto the laser radar transmitting system provided by the invention, the structural deviation caused by processing, assembly and device errors can be counteracted by adjusting an emission angle of the laser radar, the requirements of the system for the processing and assembly errors are met, and the measurement precision of the laser radar is effectively improved.

A vehicle, radar system of the vehicle and method of determining an elevation of an object. The radar system includes a transmitter that transmits a reference signal and a receiver that to receive at least one echo signal related to reflection of the reference signal from an object. The receiver includes an antenna array having a plurality of horizontally-spaced antenna elements. A processor determines a first uncertainty curve associated with an azimuth measurement related to the at least one echo signal, determines a second uncertainty curve associated with a Doppler measurement and a velocity measurement related to the at least one echo signal, and locates an intersection of the first uncertainty curve and the second uncertainty curve to determine the elevation of the object.

The invention provides a method and a device for determining an isolation distance between a 5 GHz-band RLAN station and a radar system, and the method comprises the steps: building a network topology structure of the RLAN station and the radar system according to a real deployment condition, so as to simulate signal interference in a real scene. On the basis of deterministic analysis and Monte Carlo simulation calculation, under the conditions of a preset isolation distance, a preset frequency interval, set RLAN station parameters and radar system parameters, simulation operation is carried out, the interference state of an RLAN station to a radar system is judged, and a proper isolation distance is screened out. Simulation is carried out based on various parameters in real conditions, a simulation result meeting the actual conditions can be obtained, construction and deployment of the RLAN station and the radar system are accurately and efficiently guided, the construction efficiency is improved, and the construction cost is saved.

The invention discloses a simulated airborne motion method based on receiving and transmitting co-placement multi-channel radar. The simulated airborne motion method comprises the following steps of:step 1, adopting an IDPCA technology; step 2, determining a radar antenna system based on the IDPCA technology; step 3, designing a pitching direction antenna; and step 4, determining an array radar system. According to the simulated airborne motion method disclosed by the invention, airborne motion is simulated based on an inverse phase center bias technology, the problem of system complexity caused by receiving and transmitting asynchronous displacement is solved, a radar system capable of realizing an airborne simulation function is designed, and the design complexity of a shore-based radarsystem is reduced.

The invention discloses an AR-HUD/LCD omnidirectional target detection and display method based on human eye attention, and belongs to the technical field of automatic driving, automobile environment perception, and intelligent cabins. The method comprises the following steps: acquiring a face image of a driver through a monocular camera; calibrating the monocular camera to obtain an internal reference matrix and a distortion parameter of the camera; carrying out distortion removal and graying on the image to obtain a self-quotient image; extracting a face area through a face detector, and then extracting coordinates of left and right pupils in an image plane of the monocular camera; according to the pupil image plane coordinates and pupil distance constraints, solving driver eye position space coordinates used for AR-HUD/LCD virtual image display. A neural network is used for detecting changes of a face angle of a driver, a driver attention vector is obtained, a target is detected in a vehicle-mounted panoramic image or an omnidirectional radar system according to the attention vector, and a detection object in an attention vector area is displayed through AR-HUD/LCD. According to the invention, system computing resources are saved, and the real-time performance of the detection system is improved.