Paper Info
Title
Time-Varying SAR Interference Suppression Based on Delay-Doppler Iterative Decomposition Algorithm.
Abstract
Narrow-band interference (NBI) and Wide-band interference (WBI) are critical issues for synthetic aperture radar (SAR), which degrades the imaging quality severely. Since some complex signals can be modeled as linear frequency modulated (LFM) signals within a short time, LFM-WBI and NBI are mainly discussed in this paper. Due to its excellent energy concentration and useful properties (i.e., auto-terms pass through the origin of Delay-Doppler plane while cross-terms are away from it), a novel nonparametric interference suppression method using Delay-Doppler iterative decomposition algorithm is proposed. This algorithm consists of three stages. First, we present signal synthesis method (SSM) from ambiguity function (AF) and cross ambiguity function (CAF) based on the matrix rearrangement and eigenvalue decomposition. Compared with traditional SSM from Wigner distribution (WD), the proposed SSM can synthesize a signal faster and more accurately. Then, based on unique properties in Delay-Doppler domain, a mask algorithm is applied for interference identification and extraction using Radon and its inverse transformation. Finally, a signal iterative decomposition algorithm (IDA) is utilized to subtract the largest interference from the received signal one by one. After that, a well-focused SAR imagery is obtained by conventional imaging methods. The simulation and measured data results demonstrate that the proposed algorithm not only suppresses interference efficiently but also preserves the useful information as much as possible.
Year
DOI
Venue
2018
10.3390/rs10091491
REMOTE SENSING
Keywords
Field
DocType
synthetic aperture radar (SAR),interference suppression,narrowband interference (NBI),wideband interference (WBI),ambiguity function (AF),signal synthesis
Computer vision,Algorithm,Interference (wave propagation),Artificial intelligence,Geology,Doppler effect
Journal
Volume
Issue
ISSN
10
9
2072-4292
Citations 
PageRank 
References 
0
0.34
28
Authors
6
Name
Order
Citations
PageRank
Jia Su13510.65
Haihong Tao2516.41
Mingliang Tao36810.49
Jian Xie4318.39
Yuexian Wang5157.46
Ling Wang653.50