摘要
With the rapid advancement of technology,not only do we need to acquire a clear in-verse synthetic aperture radar(ISAR)image,but also the real size of the target on the imaging plane,so it’s particularly important for the ISAR to rescale the images.That is,the ISAR image which is in the range-Doppler domain is converted into the range-azimuth domain.Actually,the key point to solving the problem is to estimate the rotation parameters.In this paper,a new scheme to rescale the images is proposed.For the sake of solving the problem of two-dimensional image blur and target high-speed,the instantaneous range instantaneous Doppler(IRID)method is used to obtain ISAR images,and the rotation parameters are estimated by comparing the rotation correlation of the two images.Using this method,the error of the estimated rotation parameters is greatly reduced,so that the target can be rescaled accurately.The simulation results verify the ef-fectiveness of the proposed algorithm.
基金
supported in part by the National Natural Sci-ence Foundation of China(No.61875070)
in part by the Science and Technology Development Plan of Jilin Province(No.20180201032GX)
in part by the Science and Techno-logy Project of Education Department of Jilin Province(No.JJKH20190110KJ)
in part by the Graduate In-novation Fund of Jilin University(No.101832020CX171).
