Simulation of a Modified Algorithm for SAR Parallel Imaging

Synthetic aperture radar has been used widely since it can provide high-resolution images. Many imaging methods have been proposed based on Fresnel approximation. These imaging methods are not applicable when synthetic aperture radar works at near field because the Fresnel approximation is completely wrong. Time domain correlation is a kind of digital reconstruction in spatial domain via Fourier transform method. It reconstructs high-resolution via simply correlation without any need for approximation or interpolation. It can reconstruct image without degrading .However, it is high computational cost for correlation. In order to reduce the heavy computational burden of time domain correlation a modified algorithm is given in this paper. The modified algorithm is also appropriate for parallel imaging processor. Practical implementation of the modified reconstruction algorithm is proposed for parallel formwork. Simulations for synthetic aperture radar parallel imaging processor are presented and the preliminary simulation results are acquired and analyzed. Simulation results demonstrate the proposed algorithm can be used to develop high resolution image in real time SAR parallel image processing.