A new radix-N resolution-fusion method for LASAR

Abstract

This paper concerns resolution-fusion method for linear array 3-D imaging SAR (LASAR). Limited by the length of the linear array, the cross-track (CT) resolution of LASAR is often lower than that in the along-track (AT) direction. To overcome this disadvantage, we assume that there are two LASAR systems whose trajectories are orthogonal to each other. Thus, we obtain a row-low-resolution image and a column-low - resolution image of the same scene. Using the orthogonal complement decomposition technique, we fuse the two images into one quasi-high-resolution image.