A method to eliminate the compound factor variable phases for SAR imaging

Range compression and azimuth compression are the two main processes for synthetic aperture radar (SAR) imaging which are in fact to eliminate the phases πkt² and πf_rs² respectively, where k and f_r are the radar and Doppler frequency rate respectively, t and s are the time about range and azimuth director respectively. But the other phases, called compound factor variable phases (CFVP), are not be eliminated. The CFVP affects the image quality and its application, for example, speckle noise, SAR interferometry. In this paper, the authors analyse the effect of CFVP, eliminate the CFVP using the integrated principle of the odd and even functions in simulated SAR data. Of course, the echo data must be translated into the proper form. The experiment results indicate that the method is valid, and the imaging quality is improved