Fast back-projection algorithm for Bistatic SAR with parallel trajectory

Konferenz: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
16.05.2006 - 18.05.2006 in Dresden, Germany

Tagungsband: EUSAR 2006

Seiten: 4Sprache: EnglischTyp: PDF

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Hu, Cheng; Zeng, Tao; Long, Teng; Juan, Chen (551 Lab, Dept of EE, BeiJing Institute of Technology, BeiJing, P. R.China, 100081)

Exploiting the fundamental redundancy between nearby aperture positions for high frequency reflectivity components in the along-track direction, we will propose a factorized back-projection algorithm for bistatic SAR with parallel trajectory inversion based on recursive partitioning of the back-projection integral. The basic back-projection summation is factorised into n processing stages, each with successively increasing sub-aperture and decreasing sub-image size, the algorithm stops when the full aperture or resolution is reached. The operation numbers reach O(N2log2N), which approaches that of the method based-on FFT.