NDLI: Rethinking the phase in single-channel SAR imagery

Content Provider	IEEE Xplore Digital Library
Author	El-Darymli, K. McGuire, P. Power, D. Moloney, C.
Copyright Year	2013
Description	Author affiliation: Fac. of Eng. & Appl. Sci., Memorial Univ., St. John's, NL, Canada (El-Darymli, K.; Moloney, C.) \|\| C-CORE, St. John's, NL, Canada (McGuire, P.; Power, D.)
Abstract	Focused single-channel synthetic aperture radar (SAR) imagery is a complex-valued. The common practice in the radar community is to entirely discard the phase information and to only use the detected intensity or magnitude image. This practice hinges on the hypotheses of the so-called fully-developed speckle model which is no more applicable to sub-meter high-resolution SAR imagery. Through properly utilizing the phase information content, not only the spatial resolution present in the complex-valued SAR image is retained, but also the accuracy of detection and recognition of targets can be potentially boosted. Two main contributions are presented in this paper. First, a novel method termed backscatter relative phase image (BRPI) is proposed to characterize the phase content in single-channel SAR imagery. Second, the von Mises (vM) distribution is adopted as a new statistical model for modeling the characteristic phase. The applicability of our proposed algorithm is demonstrated on ground-truthed Radarsat-2 civilian vehicle targets. The proposed method is straightforward to use with any complex-valued high-resolution radar data other than SAR.
Sponsorship	IEEE Aerosp. Electron. Syst. Soc.
Starting Page	429
Ending Page	436
File Size	950350
Page Count	8
File Format	PDF
ISBN	9781467348218
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-19
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	German Inst of Navigation
Subject Keyword	Convolution Radar imaging Kernel Spatial resolution Synthetic aperture radar Backscatter
Content Type	Text
Resource Type	Article

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