某型舰载机目标的ISAR成像算法研究OACSTPCD

Since the ISAR(inverse synthetic aperture radar)imaging technology can provide high-resolution two-dimensional images of targets,it has become an important tool in the fields of military reconnaissance,earth observation,and disaster monitoring.However,due to the complex motion of the targets,the traditional ISAR imaging methods often result in blurred and distorted images.The Range-Doppler(RD)algorithm,by performing a two-dimensional Fourier transform on radar echo data,can effectively suppress the impact of the target's complex motion on the ISAR image,so as to obtain clearer and more accurate images.However,the RD algorithm has limitations in handling target acceleration and micro-movement.In this paper,the imaging principle of ISAR is explained first,and then the envelope alignment in motion compensation is introduced.On this basis,an improved envelope alignment method is proposed.It is verified by imaging of a certain satellite.The verification results prove its applicability and flexibility.The improved envelope alignment method is applied to the imaging of a certain type of shipborne aircraft,and it is found that the proposed method can effectively improve the quality and resolution of ISAR images.