A Nonlinear Chirp Scaling Algorithm for Squint Sliding Spotlight Mode SAR

Konferenz: EUSAR 2016 - 11th European Conference on Synthetic Aperture Radar
06.06.2016 - 09.06.2016 in Hamburg, Germany

Tagungsband: EUSAR 2016

Seiten: 4Sprache: EnglischTyp: PDF

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Zhu, Yu (Beijing Institute of Spacecraft system Engineering, CAST, Beijing, China)
Xiong, Bin; Ding, Zegang; Xiao, Feng (School of Information and Electronics, Beijing Institute of Technology, China)

When the sliding spot light SAR works in high squint mode, there will be distortion in the two dimensional spectrum of the signal due to the coupling in range and azimuth. What’s more, the extension of azimuthal spectrum will cause spectrum overlapping. Traditional deramp algorithm can’t completely solve this problem. By using a modified azimuthal pre-process to eliminate the alias, this paper proposes a novel NCS algorithm for Squint Sliding Spotlight Mode SAR. Simulation results show the validity of this algorithm.