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- W2364320125 abstract "The Range-Doppler(RD) algorithm is widely used in inverse synthetic aperture radar imaging(ISAR).In the RD algorithm, the migration through resolution cells(MTRC) due to target rotation is usually ignored.However,with the improvement of the target size or the increase of the coherent angle,MTRC cannot be ignored for the high resolution radar.If still using RD algorithm to imaging, the ISAR image will be distorted.In order to improve the quality of ISAR images,a new ISAR imaging algorithm based on fractional Fourier transform is proposed.In the Doppler domain,MTRC can be considered as the coupling between the signal frequency and the Doppler frequency.Based on this fact,the Chirp-multiplication property of FRFT is applied to realize the Doppler scale transform. Through the processing,the coupling between the Doppler frequency and the signal frequency can be removed and cross-range profiles are obtained.Then FFT is used for each cross-range cell and the ISAR image is obtained without the mitigation of MTRC.The proposed algorithm not only can be implemented easily without the information of the target rotation,but also has the comparative computation load with RD algorithm.The simulation data and real data results demonstrate the effectiveness of the proposed algorithm." @default.
- W2364320125 created "2016-06-24" @default.
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- W2364320125 date "2009-01-01" @default.
- W2364320125 modified "2023-09-27" @default.
- W2364320125 title "A New ISAR Imaging Algorithm for Steadily Flying Big Targets based on FRFT" @default.
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