Title :
Maximum likelihood synthetic aperture radar image formation for highly nonlinear flight tracks
Author :
Gunther, Jake ; West, Roger ; Crookston, Nate ; Moon, Todd
Author_Institution :
Dept. of Elec. & Comp. Eng., Utah State Univ., Logan, UT, USA
Abstract :
This paper develops a flexible time-domain SAR imaging algorithm that is capable of accounting for somewhat arbitrary flight track geometries and platform orientations. The proposed technique casts SAR imaging as a maximum likelihood estimation problem where the ground reflectivities are taken as the parameters to be estimated. It is shown that conventional back projection is one of two steps required to form the optimal maximum likelihood image. Simulation examples are given that compare images and impulse response functions for back projection and the maximum likelihood algorithm.
Keywords :
maximum likelihood estimation; radar imaging; synthetic aperture radar; transient response; flight track geometries; highly nonlinear flight tracks; impulse response functions; maximum likelihood estimation; maximum likelihood synthetic aperture radar image formation; platform orientations; Arrays; Computational modeling; Data models; Maximum likelihood estimation; Neodymium; Pixel; Radar polarimetry; Synthetic aperture radar; image formation;
Conference_Titel :
Digital Signal Processing Workshop and IEEE Signal Processing Education Workshop (DSP/SPE), 2011 IEEE
Conference_Location :
Sedona, AZ
Print_ISBN :
978-1-61284-226-4
DOI :
10.1109/DSP-SPE.2011.5739256