Expediting back‐projection algorithm for circular SAR imaging. Issue 10 (1st May 2015)

• Record Type: Journal Article
• Authors: Li, Haolin; Zhang, Lei; Xing, Mengdao; Bao, Zheng
• Is Part Of: Electronics letters. Volume 51:Issue 10(2015)
• Page Start: 785
• Page End: 787
• Publication Date: 2015-05-01
• Subjects: image reconstruction -- resistors -- fast Fourier transforms; EBP algorithm -- expediting back‐projection algorithm -- circular successive‐approximation resistor imaging -- CSAR imaging -- unified polar grid -- wavenumber domain -- phase history domain -- WN domain -- subaperture spectrum -- image reconstruction -- two‐dimensional fast Fourier transform -- 2D FFT -- time‐consuming 2D interpolation; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2015.0348
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : The availability of an expediting back‐projection (EBP) algorithm for circular synthetic aperture radar (CSAR) imaging is investigated. EBP works by dividing the full aperture into sub‐apertures, and using a unified polar grid to generate sub‐images. On the basis of the correspondence between the wavenumber domain and the phase history domain, EBP combines all sub‐aperture spectrums into a full‐aperture one and reconstructs the CSAR image followed by a two‐dimensional (2D) fast Fourier transform. Without time‐consuming 2D interpolation, EBP is capable of decreasing the loss of spectrum, while improving significantly the computational efficiency compared with direct BP.