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      Yaw Angle Error Compensation for Airborne 3-D SAR Based on Wavenumber-domain Subblock

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          Abstract

          Airborne array antenna SAR is used to obtain three-dimensional imaging; however it is impaired by motion errors. In particular, rotation error changes the relative position among the different antenna units and strongly affects the image quality. Unfortunately, the presently available algorithm can not compensate for the rotation error. In this study, an airborne array antenna SAR three-dimensional imaging model is discussed along with the effect of rotation errors, and more specifically, the yaw angle error. The analysis reveals that along- and cross-track wavenumbers can be obtained from the echo phase, and when used to calculate the range error, these wavenumbers lead to a target position irrelevant result that eliminates the error's spatial variance. Therefore, a wavenumber-domain subblock compensation method is proposed by computing the range error in the subblock of the along- and cross-track 2-D wavenumber domain and precisely compensating for the error in the space domain. Simulations show that the algorithm can compensate for the effect of yaw angle error.

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          Author and article information

          Journal
          Journal of Radars
          Chinese Academy of Sciences
          01 August 2015
          : 4
          : 4
          : 467-473
          Affiliations
          [1 ] Institute of Electronics, Chinese Academy of Sciences
          [2 ] College of Information Engineering, Inner Mongolia University of Technology
          [3 ] China Academy of Safety Science and Technology
          Article
          3a9c8b4020a24da3a60ab8d31dec3bf4
          10.12000/JR15016

          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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