NDLI: Improved RMA based on Nonuniform Fast Fourier Transforms(NUFFT’s)

Content Provider	IEEE Xplore Digital Library
Author	Yong Wu Hongjun Song Xiuqin Shang Jingbo Zheng
Copyright Year	2008
Description	Author affiliation: Inst. of Electron., Chinese Acad. of Sci., Beijing (Yong Wu; Hongjun Song; Xiuqin Shang; Jingbo Zheng)
Abstract	Range Migration Algorithm (RMA) can perfectly fulfill the focusing of the whole scene under the condition of wide aperture and large squint angles. However, Stolt interpolation is needed in regular RMA and is time-consuming. In this paper, an improved RMA algorithm based on Nonuniform FFT (NUFFT) is developed for SAR imaging. NUFFT is substituted for the Stolt interpolation and range IFFT in the improved RMA. In this work, the principle of NUFFT and its implemented steps are analyzed in detail first. Then SAR echo signal model is introduced including the geometric model and the expression of echo signal in both time and frequency domain. Besides, algorithm flow of Regular RMA and the improved RMA based on NUFFT are given. Simulation based on SAR echo model is performed and imaging effects are compared in different squint angles. Numerical simulations illustrate the performance of the improved method. The improved RMA based on NUFFT can satisfy both the imaging precision and computation efficiency.
Starting Page	2489
Ending Page	2492
File Size	160160
Page Count	4
File Format	PDF
ISBN	9781424421787
DOI	10.1109/ICOSP.2008.4697654
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interpolation Layout Radar polarimetry Focusing Apertures Solid modeling Frequency domain analysis Approximation error Computational modeling Numerical simulation Nonuniform Fast Fourier Transform(NUFFT) Synthetic Aperture Radar(SAR) Range migration algorithm(RMA)
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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