基于Chirp Scaling的双基SAR成像PFA算法研究
doi: 10.3724/SP.J.1146.2008.00944
Research of Polar Format Algorithm for Bistatic SAR Imaging Based on Chirp Scaling
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摘要: 该文研究了基于Chirp Scaling原理实现双基聚束SAR成像的极坐标格式算法(Polar Format Algorithm, PFA)。PFA通过两个一维插值来实现数据的极坐标格式转换，插值计算量较大。该文基于发射信号的线性调频特性，在距离向对极坐标格式数据进行变标处理，仅包含信号复乘和FFT，从而避免了插值运算。文中对于接收Chirp信号和Dechirp信号分别进行了讨论，依照不同流程实现了极坐标格式算法。同插值方法相比，二者聚焦结果相当，但是CS(Chirp Scaling)的方法速度有显著提高。点目标仿真实验验证了此方法的有效性。Abstract: This paper investigates an implementation of Polar Format Algorithm(PFA) in Bistatic SAR imaging based on the principle of Chirp Scaling(CS). PFA realizes datas Polar Coordinate Transformation by two 1-D interpolations, which is computationally expensive. Based on the linear frequency modulation characteristic of emission signal, the paper uses Chirp Scaling methodology to process data in range dimension, which only includes signal multiplications and FFTs, thereby avoiding interpolation. The chirped and dechirped signals are discussed separately. Compared with interpolation, the results are equivalent, but the method of CS has increased speed significantly. The experimental simulation results with the point target validate the validity of this method.
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Rigling B D. Signal processing strategies for bistatic syntheticaperture radar[D]. [Ph.D. dissertation], the Ohio StateUniversity, 2003.[2]Chen Juan, Xiong Jin-tao, and Huang Yu-lin, et al.. Researchon a novel fast backprojection algorithm for stripmap bistaticSAR imaging[C]. 1st Asian and Pacific Conference onSynthetic Aperture Radar, Anhui China, Nov. 5-9, 2007:622-625.Wu Jun-lie, Huang Yu-lin, and Xiong Jin-tao, et al.. Rangemigration algorithm in bistatic SAR based on squint mode[C].Radar Conference 2007 IEEE, Bostan MA, April. 17-20, 2007:579-584.[3]Li F, Li S, and Zhao Y. Focusing azimuth-invariant bistaticSAR data with chirp scaling [J].Geoscience and RemoteSensing Letters.2008, 5(4):484-486[4]Zhu Dai-yin, Ye Shao-hua, and Zhu Zhao-da, et al.. Polarformat algorithm using chirp scaling for spotlight SARimaging formation[J].IEEE Transactions on Aerospace andElectronic Systems.2008, 44(4):1433-1448[5]肖靖. 聚束SAR 极坐标格式算法研究[D]. [硕士论文], 南京航空航天大学, 2004.Xiao Jing. Research on the polar format algorithm inspotlight SAR[D]. [Master dissertation], Nanjing University ofAeronautics and Astronautics, 2004.[6]Rigling B D and Moses R L. Polar format algorithm forbistatic SAR[J].IEEE Transactions on Aerospace andElectronic Systems.2004, 40(4):1147-1159[7]Papoulis A. Systems and Transforms with Application inOptics [M]. New York: McGraw-Hill, 1968: 203-204. 期刊类型引用(8)
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