Application of momentary Fourier transform to SAR processing

Author

Albrecht, S. ; Cumming, I.

Author_Institution

Dept. of Electr. & Comput. Eng., British Columbia Univ., Vancouver, BC, Canada

Volume

146

Issue

6

fYear

1999

fDate

12/1/1999 12:00:00 AM

Firstpage

285

Lastpage

297

Abstract

A common technique in signal and image processing is to extract a portion of the signal by windowing, and then perform the DFT on the window contents. The momentary Fourier transform (MFT) applies to the particular case where the window is moved one data sample along the signal between successive transforms. An alternative derivation of the recursive form of the MFT using general matrix transforms is given. How DFTs and IDFTs are used in the SPECAN (spectral analysis) and SIFFT (short IFFT) methods of synthetic aperture radar (SAR) processing is described. The MFT and inverse MFT are applied to those methods and the advantages and disadvantages they have compared to the FFT/IFFT algorithms are shown

Keywords

discrete Fourier transforms; fast Fourier transforms; inverse problems; radar signal processing; synthetic aperture radar; DFT; FFT/IFFT algorithms; IDFT; SAR processing; SIFFT method; SPECAN method; data sample; general matrix transforms; image processing; inverse momentary Fourier transform; momentary Fourier transform; recursive momentary Fourier transform; signal processing; synthetic aperture radar; windowing;

fLanguage

English

Journal_Title

Radar, Sonar and Navigation, IEE Proceedings -

Publisher

iet

ISSN

1350-2395

Type

jour

DOI

10.1049/ip-rsn:19990777

Filename

822086