Airborne SAR Real-time Processing Based on Subaperture Approach

This paper analyzes in detail the azimuth compression mechanism for airborne SAR real-time imaging,and proposes a real-time imaging algorithm based on azimuth subaperture approach for airborne SAR.Instead of full aperture compression,this algorithm first carries out azimuth subaperture compression and then completes azimuth compression by synthesizing individual results of the subaperture.The subaperture processing is implemented in series using fast fourier transform.The raw data imaging result shows that the algorithm can effectively solve the problem of the long synthesized aperture processing for real-time imaging,and improve the SAR image quality.