Synthetic aperture radar raw signals simulation of extended scenes

A synthetic aperture radar (SAR) raw signal simulation algorithm for extended scenes is presented. This algorithm is based on the SAR two\|dimensional system transform function (STF). To cope with range\|variant nature of SAR STF and increase the speed of this algorithm, new formulas for range\|variant phase corrections in range\|Doppler (RD) domain are developed. In this way, many azimuth lines can be simulated with the same SAR STF. It only needs two\|dimensional fast Fourier transform code and complex multiplications. Comparing with time\|domain simulation algorithm, it is very simple and thus efficient. Simulation results have shown that this algorithm is accurate and efficient.