Modified PFA with the Azimuth Resampling in Post Fourier Transformed Data Domain

DOI

10.2991/citcs.2012.95How to use a DOI?

Keywords

spotlight synthetic aperture radar (SAR); polar format algorithm (PFA); Fourier transform (FT)

Abstract

The polar format algorithm (PFA) is the most popular way for spotlight synthetic aperture radar (SAR) image formation and is still attractive nowadays. Conventionally, the algorithm is carried out sequentially as a range resampling, an azimuth resampling, a Fourier transform (FT) in azimuth, and an FT in range. However, this procedure usually leads to zerospadding in the azimuth resampled data domain, and consequently degrades final image quality. In this paper, a modified PFA with the azimuth resampling in post azimuth Fourier transformed data domain, as opposed to traditionally done in pre-transformed domain is studied. The modification relies on the frequency scaling property of the FT. To ensure the efficiency of the PFA, we adopt the fast FT (FFT) based scaling scheme for the azimuth resampling. Besides, a processing flow is proposed for real time application. The proposed PFA performs well and efficiently in the imaging of simulated and real spotlight SAR data.

Copyright

© 2012, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Lu Liang
AU  - Pan Li
PY  - 2012/11
DA  - 2012/11
TI  - Modified PFA with the Azimuth Resampling in Post Fourier Transformed Data Domain
BT  - Proceedings of the 2012 National Conference on Information Technology and Computer Science
PB  - Atlantis Press
SP  - 364
EP  - 367
SN  - 1951-6851
UR  - https://doi.org/10.2991/citcs.2012.95
DO  - 10.2991/citcs.2012.95
ID  - Liang2012/11
ER  -