Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small Targets

High-precision imaging of dim-small target is demonstrated using a photonics-assisted broadband distributed coherent aperture radar (DCAR). The photonics-based methods lead to a high resolution, making it possible to discriminate small targets. In addition, the cooperative work of multiple radars en...

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Main Authors:	Xuedi Xiao, Shangyuan Li, Xiaoxiao Xue, Luhang Xing, Shaowen Peng, Xiaoping Zheng, Bingkun Zhou
Format:	Article
Language:	English
Published:	IEEE 2019-01-01
Series:	IEEE Photonics Journal
Subjects:	Distributed coherent aperture radar microwave photonics dim-small targets imaging
Online Access:	https://ieeexplore.ieee.org/document/8794609/

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record_format	Article
spelling	doaj-8fe15263c20b4a4b86a1924c244bfb4c2021-04-05T16:55:28ZengIEEEIEEE Photonics Journal1943-06552019-01-011151910.1109/JPHOT.2019.29344728794609Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small TargetsXuedi Xiao0https://orcid.org/0000-0002-6556-8890Shangyuan Li1https://orcid.org/0000-0003-3143-1527Xiaoxiao Xue2https://orcid.org/0000-0002-5044-3737Luhang Xing3https://orcid.org/0000-0003-3154-453XShaowen Peng4https://orcid.org/0000-0002-4055-8864Xiaoping Zheng5https://orcid.org/0000-0003-3271-3702Bingkun Zhou6Beijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, ChinaBeijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, ChinaBeijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, ChinaBeijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, ChinaBeijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, ChinaBeijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, ChinaBeijing National Research Center for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, ChinaHigh-precision imaging of dim-small target is demonstrated using a photonics-assisted broadband distributed coherent aperture radar (DCAR). The photonics-based methods lead to a high resolution, making it possible to discriminate small targets. In addition, the cooperative work of multiple radars enhances the signal-to-noise ratio (SNR) and helps to improve the imaging precision. Experimentally, the inverse synthetic aperture radar (ISAR) coherent imaging for a small unmanned aerial vehicle is conducted by a two-unit X-band DCAR (8-12 GHz), and the range and cross-range resolution are ~3.4 cm and ~3.6 cm, respectively. About 8.5 dB image SNR gain can be achieved in full-coherence mode compared to that in monostatic mode. Taking advantage of the SNR gain, the scatters that are below the noise floor when in monostatic mode can be clearly seen when full-coherence is realized, which reveals that the proposed photonics-assisted DCAR improves the imaging precision and makes it easier to identify dim-small targets.https://ieeexplore.ieee.org/document/8794609/Distributed coherent aperture radarmicrowave photonicsdim-small targetsimaging
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Xuedi Xiao Shangyuan Li Xiaoxiao Xue Luhang Xing Shaowen Peng Xiaoping Zheng Bingkun Zhou
spellingShingle	Xuedi Xiao Shangyuan Li Xiaoxiao Xue Luhang Xing Shaowen Peng Xiaoping Zheng Bingkun Zhou Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small Targets IEEE Photonics Journal Distributed coherent aperture radar microwave photonics dim-small targets imaging
author_facet	Xuedi Xiao Shangyuan Li Xiaoxiao Xue Luhang Xing Shaowen Peng Xiaoping Zheng Bingkun Zhou
author_sort	Xuedi Xiao
title	Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small Targets
title_short	Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small Targets
title_full	Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small Targets
title_fullStr	Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small Targets
title_full_unstemmed	Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small Targets
title_sort	photonics-assisted broadband distributed coherent aperture radar for high-precision imaging of dim-small targets
publisher	IEEE
series	IEEE Photonics Journal
issn	1943-0655
publishDate	2019-01-01
description	High-precision imaging of dim-small target is demonstrated using a photonics-assisted broadband distributed coherent aperture radar (DCAR). The photonics-based methods lead to a high resolution, making it possible to discriminate small targets. In addition, the cooperative work of multiple radars enhances the signal-to-noise ratio (SNR) and helps to improve the imaging precision. Experimentally, the inverse synthetic aperture radar (ISAR) coherent imaging for a small unmanned aerial vehicle is conducted by a two-unit X-band DCAR (8-12 GHz), and the range and cross-range resolution are ~3.4 cm and ~3.6 cm, respectively. About 8.5 dB image SNR gain can be achieved in full-coherence mode compared to that in monostatic mode. Taking advantage of the SNR gain, the scatters that are below the noise floor when in monostatic mode can be clearly seen when full-coherence is realized, which reveals that the proposed photonics-assisted DCAR improves the imaging precision and makes it easier to identify dim-small targets.
topic	Distributed coherent aperture radar microwave photonics dim-small targets imaging
url	https://ieeexplore.ieee.org/document/8794609/
work_keys_str_mv	AT xuedixiao photonicsassistedbroadbanddistributedcoherentapertureradarforhighprecisionimagingofdimsmalltargets AT shangyuanli photonicsassistedbroadbanddistributedcoherentapertureradarforhighprecisionimagingofdimsmalltargets AT xiaoxiaoxue photonicsassistedbroadbanddistributedcoherentapertureradarforhighprecisionimagingofdimsmalltargets AT luhangxing photonicsassistedbroadbanddistributedcoherentapertureradarforhighprecisionimagingofdimsmalltargets AT shaowenpeng photonicsassistedbroadbanddistributedcoherentapertureradarforhighprecisionimagingofdimsmalltargets AT xiaopingzheng photonicsassistedbroadbanddistributedcoherentapertureradarforhighprecisionimagingofdimsmalltargets AT bingkunzhou photonicsassistedbroadbanddistributedcoherentapertureradarforhighprecisionimagingofdimsmalltargets
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Photonics-Assisted Broadband Distributed Coherent Aperture Radar for High-Precision Imaging of Dim-Small Targets

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