KEYWORDS: Radar, Radar signal processing, Field programmable gate arrays, Data processing, Signal generators, Reflectors, Oscilloscopes, Design and modelling, Data transmission
Weather radar simulation technology has many applications in civil aviation, military and other fields. Using the emulator, weather radar signals from the past can be observed repeatedly. With the development of electronic circuit technology, weather radar emulators develop to a faster response speed. This paper introduces a weather radar emulator based on DDS technology and details its design and realization. The test results show that the system can output the waveform specified by the upper computer and drive the upper computer to produce weather radar images.
Ultra-wideband radar has great application prospects in target detection and target imaging with the advantages of strong penetration, high range resolution, and precise target recognition. Since it is difficult to separate the target from the detection background in the B-scan image of ultra-wideband radar in a complex environment, this paper presents a method of object recognition based on edge detection and region segmentation. The Canny edge detection algorithm is used to extract the target signal in the complex background, and then the image region segmentation method is used to segment multiple targets in the dataset. To verify the feasibility of the algorithm, radar imaging experiments are carried out, and the experimental results show that the proposed method can better realize the target recognition and extraction of the B-scan image of ultra-wideband radar in complex environments.
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