一種基于距離補(bǔ)償?shù)姆植际叫⌒l(wèi)星雙基SAR成像方法
An Imaging Method of Distributed Small Satellites Bistatic SAR Based on Range Distance Compensation
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摘要: 在一定條件下,分布式小衛(wèi)星雙基SAR可近似認(rèn)為是一種信號發(fā)射器與接收器平行運(yùn)動(dòng)的雙基SAR系統(tǒng)。針對其結(jié)構(gòu)特點(diǎn),該文提出一種基于距離補(bǔ)償?shù)某上穹椒?。通過該方法可把雙基SAR的相位信息以單基SAR 的形式表示,這樣就可利用單基SAR的成像算法對雙基SAR進(jìn)行研究。本文結(jié)合波數(shù)域算法對這一方法進(jìn)行了闡述,并給出了仿真結(jié)果。仿真結(jié)果表明,該方法可有效應(yīng)用于分布式小衛(wèi)星雙基SAR的成像中。
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關(guān)鍵詞:
- 分布式小衛(wèi)星; 合成孔徑雷達(dá)（SAR）; 雙基SAR
Abstract: Under the given condition, distributed small satellites bistatic SAR can be considered as a kind of bistatic SAR, whose transmitter and receiver move in parallel. In this paper, an imaging method based on range distance compensation is discussed. With this method the phase of distributed small satellites bistatic SAR can be expressed in the form of monostatic SAR. Therefore, the monostatic SAR imaging algorithms can be used to process the data obtained from bistatic SAR system. To illuminate this method better, wavenumber-domain algorithm has been used. Simulation result is also provided here, it shows that this method can be effectively used in distributed small satellites bistatic SAR imaging system. -
王巖飛,張冰塵,廖蜀燕,等.分布式小衛(wèi)星合成孔徑雷達(dá)綜合成像系統(tǒng)方案研究.微小衛(wèi)星編隊(duì)飛行及應(yīng)用論文集,北京,2000.7:103-114.[2]Soumekh M. Wide-bandwidth continuous-wave monostatic/bistatic synthetic aperture radar imaging. IEEE International Conference on Image Processing, Chicago, Oct. 1998:361 - 365.[3]Soumekh M. Bistatic synthetic aperture radar inversion with application in dynamic object imaging. IEEE Trans. on Signal Processing, 1991, SP-39(9): 2044 - 2055.[4]Yu Ding, Munson D C, Jr.. A fast back-projection algorithm for bistatic SAR imaging. IEEE International Conference on Image Processing, Rochester, New York, Vol. 2, Sept. 2002:449 - 452.[5]林來興.微小衛(wèi)星編隊(duì)飛行組成虛擬衛(wèi)星研究.微小衛(wèi)星編隊(duì)飛行及應(yīng)用論文集,北京,2000.7:1-35.[6]Pettersson M L. Extraction of moving ground targets by a bistatic ultra-wideband SAR[J].IEE Proc.-Radar, Sonar Navig.2001,148(1):35-[7]Soumekh M. A system model and inversion for synthetic aperture radar imaging[J].IEEE Trans. on Image Processing.1992,1(1):64-[8]Choi H, Munson D C Jr.. On the optimality and exactness of wavenumber-domain SAR data processing. IEEE International Conference on Image Processing, Austin, 1994:456 - 460. -
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