單相位中心多波束合成孔徑雷達(dá)的方位模糊分析
Study on Azimuth Ambiguity Analysis of Single Phase Center Multiple Beams Synthetic Aperture Radar
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摘要: 星載合成孔徑雷達(dá)設(shè)計中的一個基本限制是測繪帶寬和方位分辨率之間的矛盾，采用單相位中心多波束技術(shù)可在一定程度上緩解這一矛盾，從而成為實現(xiàn)高分辨率寬測繪帶星載合成孔徑雷達(dá)系統(tǒng)的一種技術(shù)途徑。該文在簡要介紹單相位中心多波束技術(shù)原理的基礎(chǔ)上，分析了單相位中心多波束合成孔徑雷達(dá)方位模糊的來源，提出了單相位中心多波束合成孔徑雷達(dá)的方位模糊計算公式，并給出了單相位中心多波束合成孔徑雷達(dá)方位模糊的仿真計算實例。該文分析結(jié)果對單相位中心多波束合成孔徑雷達(dá)的系統(tǒng)設(shè)計具有一定的參考價值。
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關(guān)鍵詞:
- 星載合成孔徑雷達(dá);高分辨率寬測繪帶;單相位中心多波束;方位模糊
Abstract: A fundamental constraint in Synthetic Aperture Radar(SAR) designing is the contradiction between swath width and azimuth resolution. Single phase center multiple beams technique can alleviate the contradiction in some extent and is one of solutions to implement high resolution wide swath spaceborne synthetic aperture radar systems. In this paper, based on the introduction to the principle of single phase center multiple beams technique, the origin of azimuth ambiguities of single phase center multi-beam synthetic aperture radar is analyzed and the formula to compute azimuth ambiguities is presented. Then a simulation example of computing azimuth ambiguities of single phase center multi-beam synthetic aperture radar is given. The results of the paper can be reference for designing single phase center multi-beam synthetic aperture radar systems. -
Currie A, Brown M A. Wide-swath SAR. IEE Proceedings-F. 1992, 139(2): 122-135.[2][日]藤坂貴著，王淑蘭譯. 方位向高分辨力寬測繪帶的多波束合成孔徑雷達(dá). 空載雷達(dá)，2000, (4): 36-44.[3]Curlander J C, McDonough R N. Synthetic aperture radar systems and signal processing. New York：John Wiley Sons, Inc. 1991：296-308.[4]Li F K, Johnson W T K. Ambiguities in spaceborne synthetic aperture radar systems[J].IEEE Trans. Aerosp. and Electrom. Systems.1983, 19(3):389-397[5]魏鐘銓. 合成孔徑雷達(dá)衛(wèi)星. 北京：科學(xué)出版社，2001: 141-144. -
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