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http://dx.doi.org/10.5573/ieek.2013.50.3.221

A Study on the Synthetic Aperture Radar System Motion Compensation Technique  

Kang, Eun-Kyun (Dept. of Electronic & Engineering, YUHAN College)
Ra, Keuk-Hwan (Dept. of Electronic Engineering, KWANGWOON University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.3, 2013 , pp. 221-229 More about this Journal
Abstract
In this paper, the image formation by the motion compensation technique for Synthetic Aperture Radar system(SAR) were realized through the computer simulation. The motion compensation technique performed image data with the range compression, the compensation procedure, the azimuth compensation and the noise elimination procedure. The range compression procedure transform the SAR raw data into the frequency domain and correlate with the range reference function and then inversely transform into the time domain. The compensation procedure contain the aircraft fluctuations compensation and the radar image degrading effect elimination procedure which was caused by image formation algorithm itself. The aircraft fluctuations compensation procedure perform the first stage which correct the phase angle and the second stage which calculate the Doppler frequency and determine the coordinate of the received signal. The radar image degrading effect elimination procedure also perform range migration compensation and the image defocussing effect compensation. The azimuth compression procedure transform the compensation data to the frequency domain and correlate with the azimuth reference function. The azimuth correlated data are inversely transformed to the time domain which is called SAR image data. When the above procedure were completed, the image data contains the received signals mixed with noise. The threshold technique was applied to elimination the noise from the mixed image data.
Keywords
radar; image formation; motion compensation; defocussing effect;
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