Title :
A fast implementation method for the FFBP algorithm
Author :
Zemin Yang ; Qi Dong ; Guangcai Sun ; Mengdao Xing
Author_Institution :
Nat. Lab. of Radar Signal Process., Xidian Univ., Xi´an, China
Abstract :
A fast implementation method for the fast factorized back-projection (FIM-FFBP) algorithm is proposed to focus high-resolution spotlight synthetic aperture radar (SAR) data. Different from the original FFBP utilizing two-dimensional image-domain interpolation for sub-aperture fusion, FIM-FFBP finishes the image fusion using chirp-z transform and circular shifting. FIM-FFBP yields enhanced efficiency over the nearest interpolation with 4 times upsampling based FFBP, and keeps the high precision simultaneously. Real-data experiment verifies the efficiency superiorities of the FIM-FFBP.
Keywords :
Z transforms; image fusion; image resolution; interpolation; radar imaging; radar resolution; synthetic aperture radar; FIM-FFBP algorithm; chirp-z transform; circular shifting; fast factorized back-projection algorithm; fast implementation method; high-resolution spotlight SAR data; image fusion; subaperture fusion; synthetic aperture radar; two-dimensional image domain interpolation; Algorithm design and analysis; Apertures; Azimuth; Image resolution; Interpolation; Signal processing algorithms; Synthetic aperture radar; Spotlight; fast factorized back-projection (FFBP); synthetic aperture radar (SAR);
Conference_Titel :
Radar Conference (RadarCon), 2015 IEEE
Conference_Location :
Arlington, VA
Print_ISBN :
978-1-4799-8231-8
DOI :
10.1109/RADAR.2015.7131034
