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      A Subaperture Wavenumber Domain Imaging Algorithm for Sliding Spotlight FMCW-SAR

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          Abstract

          This paper analyses the geometry of sliding spotlight FMCW-SAR, sets up the echo model and derives the two-dimensional spectrum of its echo signal. According to its signal characteristics a subaperture wavenumber domain algorithm is presented, which corrects the Doppler Frequency Shift Effect caused by the motion within the sweep. The algorithm can acquire the images with azimuth resolution better than that obtained in the stripmap case by the subaperture coherent recombination and with an imaged area larger than that achieved in the spotlight operation by adjoining the subaperture images. Rationality of the echo model and the effectiveness of the proposed algorithm are verified by the simulation results and analysis.

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          Author and article information

          Journal
          Journal of Radars
          Chinese Academy of Sciences
          01 September 2013
          : 2
          : 3
          : 319-325
          Affiliations
          [1 ] China Electronics Corporation
          Article
          bb6131470632464fbbd9396322fee6a9
          10.3724/SP.J.1300.2013.13044

          This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

          Categories
          Technology (General)
          T1-995

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