Paper Info
Title
Wideband Interference Mitigation in High-Resolution Airborne Synthetic Aperture Radar Data
Abstract
Radio frequency interference is a major issue for synthetic aperture radar (SAR) imaging. Especially with the presence of wideband interference (WBI), the signal-to-interference ratio (SIR) of the measurements is greatly degraded, thus making it difficult to produce a high-quality SAR image. Compared with narrow-band interference (NBI), WBI occupies a larger bandwidth and is more complicated to deal with. This paper addresses the detection and mitigation of WBI in high-resolution airborne SAR data. First, a WBI-corrupted echo is characterized in the time-frequency representation by utilizing the short-time Fourier transform. In this way, the original range-spectrum WBI mitigation problem can be simplified into a series of instantaneous-spectrum NBI mitigation problems. For each instantaneous spectrum, the existence of interference signal can be identified according to the negentropy-based statistical test. Furthermore, the interference signal is mitigated by notch filtering or eigensubspace filtering. The experimental results of the simulated data, as well as real measured data sets, show that the proposed scheme is effective in suppressing the interference signal and in obtaining a high-quality image.
Year
DOI
Venue
2016
10.1109/TGRS.2015.2450754
Geoscience and Remote Sensing, IEEE Transactions
Keywords
Field
DocType
radar imaging,remote sensing by radar,synthetic aperture radar,SAR imaging,WBI detection,WBI mitigation,high-quality SAR image,high-resolution airborne SAR data,instantaneous spectrum,instantaneous-spectrum NBI mitigation problems,narrow-band interference,original range-spectrum WBI mitigation problem,radio frequency interference,short-time Fourier transform,signal-to-interference ratio,synthetic aperture radar,wideband interference mitigation,Interference mitigation,radio frequency interference (RFI),synthetic aperture radar (SAR),wideband interference (WBI)
Wideband,Radar imaging,Synthetic aperture radar,Side looking airborne radar,Electromagnetic interference,Remote sensing,Filter (signal processing),Inverse synthetic aperture radar,Interference (wave propagation),Mathematics
Journal
Volume
Issue
ISSN
54
1
0196-2892
Citations 
PageRank 
References 
5
0.45
11
Authors
3
Name
Order
Citations
PageRank
Mingliang Tao16810.49
Zhou, F.2252.98
Zi-jing Zhang313515.74