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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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8794609/ |
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| author | Xuedi Xiao Shangyuan Li Xiaoxiao Xue Luhang Xing Shaowen Peng Xiaoping Zheng Bingkun Zhou |
| author_facet | Xuedi Xiao Shangyuan Li Xiaoxiao Xue Luhang Xing Shaowen Peng Xiaoping Zheng Bingkun Zhou |
| author_sort | Xuedi Xiao |
| collection | DOAJ |
| 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. |
| format | Article |
| id | doaj-art-8fe15263c20b4a4b86a1924c244bfb4c |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-8fe15263c20b4a4b86a1924c244bfb4c2025-08-20T03:32:50ZengIEEEIEEE 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 |
| 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 |
| title | 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_short | 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 |
| topic | Distributed coherent aperture radar microwave photonics dim-small targets imaging |
| url | https://ieeexplore.ieee.org/document/8794609/ |
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