Spaceborne SAR azimuth ambiguities removal based on apodization algorithm

This paper proposes a new method to suppress azimuth ambiguities for synthetic aperture radar (SAR) images. This thought derives from sidelobes suppression in SAR images, by comparing the values of two or more versions of normalized SAR images, which are obtain after different weighting functions for the same image, we choose the minimum one as its final value, therefore the new image could have lower sidelobes. Azimuth ambiguities will be relieved after smaller azimuth processor bandwidth, but the azimuth resolution also be deteriorated, on this condition, by using the similar concept as sidelobes suppression, we can preserve the resolution of mainlobe and suppress the azimuth ambiguities at the same time.