Study On Real-Time Signal Processing For Airborne SAR Imaging

Synthetic aperture radar (SAR) has the characteristic of all-weather, day/night andlong range, so it is of great value to study on real-time processing for SAR imaging inboth civilian and military applications. In the algorithm for SAR, the estimationprecision of Doppler parameter affects the quality of image directly. At first, the paperdiscusses the method of Doppler parameter estimation based on raw datum, andanalyzes the realization for Range-Doppler algorithm in real-time processing, motioncompensation, datum subsection and geometry emendation. Then, the correspondingsystem solution based on the algorithm is put forward. The Versa Module Eurocard busconstruction is adopted in the system design. Operation core is a shared-bus,parallel-processing module, which is composed of four digital signal processors. Thewhole real-time imaging algorithm realization in software is also given. At last, thepaper expounds the application of Real Time Operation System (RTOS) on SARimaging. So the paper is of realistic meaning in a sense for studying SAR imagingreal-time signal processing.