8 results about "Early-warning radar" patented technology

This invention provides a wavefront design method and system based on a space-based early warning radar, including acquiring the system scanning time, radar range-azimuth ground coverage range, beam coverage overlap rate, radar azimuth beam center, and radar initial wavefront near-end down-view angle; determining the 3-dB elevation main lobe beamwidth of the current wavefront based on the near-end down-view angle value of the current range wavefront; determining the far-end down-view angle value of the current wavefront based on the beam center calculation result of the current range wavefront; iteratively updating the near-end down-view angle of the next range wavefront to the near-end down-view angle of the current wavefront, and outputting all range wavefront division results; sequentially calculating the 3-dB azimuth main lobe beamwidth based on the near-end spatial cone angle of each azimuth wavefront, sequentially updating the beam center and far-end down-view angle of the azimuth wavefront, iteratively processing until the azimuth-ground distance meets the given azimuth coverage requirements; and finally outputting the wavefront design calculation results that meet the range-azimuth coverage requirements and the required dwell time for each wavefront.

The application discloses a thunder and lightning comprehensive detection early warning system and a thunder and lightning detection method thereof, which comprises an atmospheric electric field detection module, a meteorological radar module and a system module. The atmospheric electric field detection module is used for detecting characteristic value A of a thundercloud in a specific area, which at least contains electric field data. The meteorological radar module is used for detecting characteristic value B of the thundercloud in the specific area, which at least contains geographic position data. The system module is used for connecting the atmospheric electric field detection module and the meteorological radar module, and combining the received characteristic value A with the characteristic value B to form thunder and lightning early warning information. The application combines the meteorological radar and the atmospheric electric field equipment, embeds the meteorological radar device into the atmospheric electric field instrument, detects echo data by the radar, converts the echo data into an echo intensity color map, and superimposes the color map on a map to form a thunder and lightning detection early warning radar system.

Radome element (1) for a distance warning radar of a vehicle, wherein the radome element (1) is formed as a two-component component with an inner plastic film (4), wherein the radome element (1) - a visible component (2) made of a transparent plastic, - the three-dimensionally formed and at least one-sided printed plastic film (4) with radar-transparent chrome optics between the visible component (2) and a rear component (3) and - the rear component (3) made of black or transparent plastic with at least one lateral transparent light coupling surface (L1) formed in the edge area and / or a further transparent light coupling surface (L2) formed in the edge area includes characterized in that the rear component (3) is provided with a surface coating (B) designed for light extraction in the direction of the visible component (2).

This invention proposes a dual-band cooperative anti-UAV radar system and method. An X-band search and early warning radar searches for and tracks interception targets in the warning airspace at first-cycle intervals, and sends the acquired target information to its corresponding Ka-band command guidance radar. The Ka-band command guidance radar, based on the received target information, controls the interceptor to carry out the interception, thereby achieving the purpose of countering UAVs. By using the X-band search and early warning radar to search for and track the target, and the Ka-band command guidance radar to control the interceptor to carry out the interception, the system can ensure the accuracy of task execution by dividing the target objects. Furthermore, because the number of tasks that each radar needs to handle is reduced, the number of tasks it can handle is increased, thereby improving the system's comprehensive interception capability in multi-target, clustered, and saturation attack scenarios.

In the case of low signal-to-noise ratio and lack of false target samples, it is difficult to accurately identify true and false targets, resulting in serious false alarm or missed alarm. In order to solve this problem, the application provides a false target jamming identification method of early warning radar based on fast-slow time domain joint features. Firstly, the radar echo is processed by pulse compression and coherent accumulation; then the peak search algorithm is used to determine the Doppler unit and distance channel of the true and false targets; after the true and false targets are truncated along the fast time dimension, the fast Fourier transform (FFT) is performed to extract the slow time domain joint features; the extracted unmarked true-false target feature mixed data set U and the labeled true target features are used to construct a joint data set, which is input into a support vector machine (SVM) for class prior probability estimation, and the average class prior probability is used to label the data set U to obtain the joint data set P+U; the joint data set is input into a two-channel feature fusion network for training and identification.

The invention provides a moving target multi-domain detection and positioning integrated method and system under a strong clutter background, and the method comprises the steps: obtaining multi-channel echo data of a space-based early warning radar, and carrying out the data rearrangement and distance dependence error compensation; constructing a first group of sub-channel data and a second group of sub-channel data; performing first-stage adaptive filtering processing on the first group of sub-channel data and the second group of sub-channel data to obtain a first-stage processing result; second-stage moving target detection is carried out on the first-stage processing result, and when a moving target is detected, a distance unit and a Doppler unit where the moving target is located are output; the angle of the moving target is calculated by using a monopulse and difference beam angle measurement principle; and finally, calculating the three-dimensional space position of the moving target in the geodetic coordinate system through the conversion relation between the radar coordinate system and the geodetic coordinate system. According to the invention, through a two-stage adaptive processing structure, integrated processing of moving target detection, angle estimation and positioning is effectively realized under a strong clutter background.

This invention provides an integrated method and system for multi-domain detection and localization of moving targets in strong clutter backgrounds. The method includes acquiring multi-channel echo data from a space-based early warning radar and performing data rearrangement and range-dependent error compensation; then constructing a first set of sub-channel data and a second set of sub-channel data; performing a first-level adaptive filtering process on both sets of sub-channel data to obtain the first-level processing result; performing a second-level moving target detection on the first-level processing result, outputting the range cell and Doppler cell when a moving target is detected; calculating the angle of the moving target using the single-pulse sum-difference beam angle measurement principle; and finally calculating the three-dimensional spatial position of the moving target in the geodetic coordinate system through the transformation relationship between the radar coordinate system and the geodetic coordinate system. This invention, through a two-level adaptive processing structure, effectively achieves integrated processing of moving target detection, angle estimation, and localization in strong clutter backgrounds.

1. The name of the design product: radar jamming simulator. 2. The use of the design product: used for creating realistic jamming and target environment for air defense early warning radar in working frequency band. 3. The design points of the design product: the overall appearance shape of the product. 4. The picture or photo that can best show the design points of the design: perspective view 1.