Title :
Comparison of the Imaging Resolutions of Time Reversal and Back-Projection Algorithms in EM Inverse Scattering
Author :
Zhang, Peng ; Zhang, Xiaojuan ; Fang, Guangyou
Author_Institution :
Key Lab. of Electromagn. Radiat. & Sensing Technol., Grad. Univ. of Chinese Acad. of Sci., Beijing, China
Abstract :
The imaging resolutions derived by the time reversal (TR) and back-projection (BP) algorithms, which are widely used in electromagnetic inverse scattering problems, have been investigated in this letter. Under the Born approximation, the point spread functions (PSFs) for TR and BP are first derived and then used to compare their imaging resolutions. The PSFs are examined by numerical experiments, which show that the TR and BP algorithms have the same imaging resolutions whether in the free space or the layered media cases.
Keywords :
approximation theory; electromagnetic wave scattering; image resolution; BP algorithm; Born approximation; EM inverse scattering; PSF; TR algorithm; back-projection algorithm; electromagnetic inverse scattering; imaging resolution; point spread function; time reversal algorithm; Azimuth; Green´s function methods; Image resolution; Imaging; Nonhomogeneous media; Receivers; Signal resolution; Back projection (BP); imaging resolution; inverse scattering; point spread function (PSF); time reversal (TR);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2012.2206012
