FOCUSING SAR IMAGES BY INVERSE SCALED FOURIER TRANSFORMATION

摘要

The SAR focusing process presented in this paper is realized by inverse scaled Fourier transformation. The basic idea, published in [1] and [2] relies on the fact that the raw data spectrum is a 'deformed' replica of the scene spectrum. Removing this deformation by applying a scaled IFFT (inverse FFT) directly yields the focused image. The paper presents the derivation of the algorithm, discusses the relationship to chirp scaling algorithms, and presents some results.