NDLI: Frequency-domain versus time-domain imaging for photonics-based broadband radar

Content Provider	IET Digital Library
Author	Sun, Guanqun Zhang, Fangzheng Pan, Shilong Ye, Xingwei
Abstract	Photonics-based radar enables a large operation bandwidth that is particularly favourable for high-resolution synthetic aperture imaging. However, how to implement fast and high-accuracy imaging with photonics-based broadband radar is still an open question. In this Letter, the performance of photonics-based inverse synthetic aperture radar imaging with frequency-domain and time-domain algorithms are experimentally investigated and compared. The results show that, frequency-domain range–Doppler algorithm has fast imaging capability, but the image suffers from defocusing and distortions. Although migration compensation techniques can be applied to improve the imaging accuracy, the imaging speed is significantly reduced. On the other hand, using time-domain back-projection (BP) algorithm can achieve well-focused images, and the imaging speed can be enhanced with fast BP methods. Therefore, the time-domain imaging method is found to be the best choice for fast and high-accuracy synthetic aperture imaging with photonics-based broadband radars.
Starting Page	1330
Ending Page	1332
Page Count	3
ISSN	00135194
Volume Number	56
e-ISSN	1350911X
Issue Number	Issue 24, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/56/24
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2020.2273
Journal	Electronics Letters
Publisher Date	2020-10-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Doppler Radar Frequency Domain Analysis Frequency-domain Imaging Frequency-domain Range–Doppler Algorithm High-accuracy Imaging High-accuracy Synthetic Aperture High-resolution Synthetic Aperture Imaging Imaging Accuracy Imaging Speed Mathematical Analysis Migration Compensation Technique Optical, Image And Video Signal Processing Photonics-based Broadband Radar Photonics-based Inverse Synthetic Aperture Radar Imaging Radar Equipment Radar Imaging Radar Theory Synthetic Aperture Radar System And Application Time Domain Analysis Time-domain Algorithm Time-domain Back-projection Algorithm Time-domain Imaging Method Well-focused Image
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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