BIE Bowen, SUN Lu, XING Mengdao, LIANG Yi, SUN Guangcai
Journal of Electronics
The missile-borne SAR platform has the characteristics of nonlinear trajectory and high-squint mode. A frequency-domain imaging algorithm based on local Cartesian coordinate and subregion processing is proposed. For high-squint mode, the range model is built in local Cartesian coordinate to match accurately the azimuth signal after range walk correction. To compensate the azimuth-dependent range cell migration and Doppler parameters accurately, the imaging area is divided into several subregions. The final focused image can be obtained when all the subregion images are interpolated uniformly into the ground coordinate. Finally, the point targets simulation and real SAR data verify the effectiveness of the proposed algorithm.
A frequency-domain algorithm based on local Cartesian coordinate and Subregion processing for missile-borne SAR imaging
BIE Bowen, SUN Lu, X Mengdao, L Yi, SUN Guangcai - Journal of Electronics, 2018