雙站逆合成孔徑雷達(dá)成像理論研究
Bistatic Inverse Synthetic Aperture Radar Image Formation
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摘要: 常規(guī)單站逆合成孔徑雷達(dá)(ISAR)不能對(duì)沿雷達(dá)視線方向飛行的目標(biāo)成像,收發(fā)分置的雙站逆合成孔徑雷達(dá)(雙站ISAR)系統(tǒng)解決了以上問(wèn)題。該文分析了雙站ISAR目標(biāo)回波的特點(diǎn),研究了雙站ISAR對(duì)目標(biāo)成像時(shí)的成像原理、方位分辨力、目標(biāo)尺寸限制和采樣率要求,得到了嚴(yán)格數(shù)學(xué)解,最后給出了模擬飛機(jī)目標(biāo)的成像結(jié)果。
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關(guān)鍵詞:
- 雙站ISAR;方位分辨力;采樣率
Abstract: The use of a monostatic radar configuration limits the ability of an Inverse Synthetic Aperture Radar (ISAR) system to image targets moving along the radar Line Of Sight (LOS). By employing bistatic geometries this limitation may be overcome. This paper analyzes the echo model of bistatic ISAR. The imaging theory, azimuth resolution, target size limitation and sampling rate of bistatic ISAR are studied in detail, and the analytical solutions are obtained. The computer simulation images are presented. -
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