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 SA...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 algorithms,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.展开更多
基金Supported by the National Natural Science Foundation of China(40376051)
文摘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 algorithms,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.
