A Radar Imaging Method Using Nonperiodic Interrupted Sampling Linear Frequency Modulation Signal

Linear frequency modulation (LFM) signal is widely applied in imaging radar including synthetic aperture radar (SAR) and inverse SAR (ISAR). Jamming techniques against LFM imaging radar develop rapidly in the past decades, which make radar imaging with LFM signal to face a great challenge. In this p...

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Bibliographic Details
Published in:IEEE sensors journal 2018-10, Vol.18 (20), p.8294-8302
Main Authors: Wu, Qihua, Liu, Xiaobin, Liu, Jin, Zhao, Feng, Xiao, Shunping
Format: Article
Language:English
Subjects:
Anechoic chambers
compressive sensing
Computer simulation
de-chirp
Doppler effect
Frequency modulation
Image reconstruction
Imaging
Imaging radar
inverse synthetic aperture radar (ISAR)
Jamming
Jamming performance
linear frequency modulation (LFM)
Nonperiodic interrupted sampling
Radar
Radar imaging
Sampling
Synthetic aperture radar
Tomography
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Summary:Linear frequency modulation (LFM) signal is widely applied in imaging radar including synthetic aperture radar (SAR) and inverse SAR (ISAR). Jamming techniques against LFM imaging radar develop rapidly in the past decades, which make radar imaging with LFM signal to face a great challenge. In this paper, a novel radar imaging method using nonperiodic interrupted sampling-LFM (NIS-LFM) signal is proposed. The radar anti-jamming performance can greatly benefit due to the random property of the NIS-LFM signal. Besides, the compressive sensing-based algorithm is further proposed for radar image reconstruction by utilizing the piecewise sparsity of the NIS-LFM echo. Both measured ISAR data simulations and microwave anechoic chamber experiments demonstrate the validity of the proposed imaging method.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2018.2865531