太赫兹科学与电子信息学报
太赫玆科學與電子信息學報
태혁자과학여전자신식학보
Information and Electronic Engineering
2014年
4期
501-504
,共4页
单频雷达%二维成像%正交转轴%多普勒频率
單頻雷達%二維成像%正交轉軸%多普勒頻率
단빈뢰체%이유성상%정교전축%다보륵빈솔
single frequency radar%2-D imaging%orthogonal rotation axis%Doppler frequency
当目标相对雷达存在二维转动时,即使采用单频雷达也可获得目标的二维图像。特别是在目标围绕2根垂直于雷达视线的正交转轴旋转时,成像投影平面垂直于雷达视线,获得视角类似于光学照相机的成像结果。分析了单频雷达二维成像的原理,并利用图形电磁计算软件(GRECO)模拟1.5 THz单频雷达的坦克模型回波,通过二维快速傅里叶变换(FFT)进行二维方位向压缩,获得目标的侧视图像。
噹目標相對雷達存在二維轉動時,即使採用單頻雷達也可穫得目標的二維圖像。特彆是在目標圍繞2根垂直于雷達視線的正交轉軸鏇轉時,成像投影平麵垂直于雷達視線,穫得視角類似于光學照相機的成像結果。分析瞭單頻雷達二維成像的原理,併利用圖形電磁計算軟件(GRECO)模擬1.5 THz單頻雷達的坦剋模型迴波,通過二維快速傅裏葉變換(FFT)進行二維方位嚮壓縮,穫得目標的側視圖像。
당목표상대뢰체존재이유전동시,즉사채용단빈뢰체야가획득목표적이유도상。특별시재목표위요2근수직우뢰체시선적정교전축선전시,성상투영평면수직우뢰체시선,획득시각유사우광학조상궤적성상결과。분석료단빈뢰체이유성상적원리,병이용도형전자계산연건(GRECO)모의1.5 THz단빈뢰체적탄극모형회파,통과이유쾌속부리협변환(FFT)진행이유방위향압축,획득목표적측시도상。
The-2-D-imaging-will-be-realized-by-using-single-frequency-radar,-when-the-target-executes-2-D-rotation-relative-to-the-radar.-Especially-when-the-target-rotates-around-two-orthogonal-rotation-axes-which-are-both-perpendicular-to-the-radar-line-of-sight,-therefore-the-projection-image-plane-is-perpendicular-to-the-radar-line-of-sight,-the-image-whose-angle-of-sight-is-similar-as-photographic-camera-will-be-obtained.-The-principle-of-2-D-imaging-using-single-frequency-radar-is-analyzed.-The-single-frequency-THz(at-1.5-THz)-radar-echo-from-a-tank-model-is-simulated-by-using-GRECO(Graphical-Electromagnetic-Computing)-software.-The-side-view-of-the-model-is-obtained-through-2-D-azimuth-compression-using-Fast-Fourier-Transform(FFT).