聚束模式复杂轨迹BiSAR高效频域成像方法OA

An efficient frequency-domain imaging method is presented to resolve the echo spectrum aliasing and high-order Doppler spatial variance problem in spotlight-mode bistatic synthetic aperture radar(SAR)imag-ing under complex trajectory.This method first employs two-dimensional decoupling processing based on de-skewing operation to achieves signal decoupling and spectral aliasing elimination,and then introduces high-or-der nonlinear chirp scaling technique based on Doppler centroid expansion to effectively compensate the nonlin-ear phase errors caused by high-order spatial variations.The simulation results show that the proposed method achieves precise focusing imaging of the full scene of spotlight-mode bistatic SAR imaging under complex trajec-tory while significantly improving the processing efficiency.