一种基于距离补偿的分布式小卫星双基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: 在一定条件下,分布式小卫星双基SAR可近似认为是一种信号发射器与接收器平行运动的双基SAR系统。针对其结构特点,该文提出一种基于距离补偿的成像方法。通过该方法可把双基SAR的相位信息以单基SAR 的形式表示,这样就可利用单基SAR的成像算法对双基SAR进行研究。本文结合波数域算法对这一方法进行了阐述,并给出了仿真结果。仿真结果表明,该方法可有效应用于分布式小卫星双基SAR的成像中。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.
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