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PIER PIER B PIER C PIER M PIER Letters
2013-05-22
Imaging Enhancement of Stepped Frequency Radar Using the Sparse Reconstruction Technique
By
Bo Pang,

    Dr. Bo Pang

    School of Electronic Science and Engineering

    National University of Defense Technology

    China

    Homepage

Dahai Dai,

    Dr. Dahai Dai

    School of Electronic Science and Engineering

    National University of Defense Technology

    China

    Homepage

Shiqi Xing,

    Dr. Shiqi Xing

    School of Electronic Science and Engineering

    National University of Defense Technology

    China

    Homepage

Yongzhen Li,

    Dr. Yongzhen Li

    School of Electronic Science and Engineering

    National University of Defense Technology

    China

    Homepage

Xuesong Wang

    Dr. Xuesong Wang

    College of Electronic Science and Engineering

    National University of Defense Technology

    China

    Homepage

Progress In Electromagnetics Research, Vol. 140, 63-89, 2013
doi:10.2528/PIER13030407
Abstract
Based on the observation that sparsity assumption is well satisfied in the synthetic aperture radar (SAR) imaging applications, there is increasing interest in utilizing compressive sensing (CS) in SAR imaging. However, there are still several problems which should be concerned in CS-based imaging approaches. Firstly, inevitable noise and clutter challenge the performance of CS algorithms. Secondly, the super-resolving ability of CS algorithms is not sufficiently exploited in most cases. Thirdly, nonideal characteristics of mutual coherence affect the performance of CS algorithms in complex scenes. In this paper, a novel CS imaging framework is proposed for the purpose of improving the imaging performance of stepped frequency SAR. Meanwhile, a super-resolving imaging algorithm is proposed based on the nonquadratic optimization technique. Simulated and rail SAR measured data are applied to demonstrate the effectiveness of the novel framework with the proposed super-resolving algorithm. Experimental results validate the superiority of this method over previous approaches in terms of robustness in low SNR, better super-resolving ability and improved imaging performance in complex scenes.
Citation
Bo Pang, Dahai Dai, Shiqi Xing, Yongzhen Li, and Xuesong Wang, "Imaging Enhancement of Stepped Frequency Radar Using the Sparse Reconstruction Technique," Progress In Electromagnetics Research, Vol. 140, 63-89, 2013.
doi:10.2528/PIER13030407
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