Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing

Abstract Real-time and high-resolution target detection is highly desirable in modern radar applications. Electronic techniques have encountered grave difficulties in the development of such radars, which strictly rely on a large instantaneous bandwidth. In this article, a photonics-based real-time...

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Autores principales:	Fangzheng Zhang, Qingshui Guo, Shilong Pan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fd3097b0047a46ab853f70aacd00d326
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spelling	oai:doaj.org-article:fd3097b0047a46ab853f70aacd00d3262021-12-02T11:52:20ZPhotonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing10.1038/s41598-017-14306-y2045-2322https://doaj.org/article/fd3097b0047a46ab853f70aacd00d3262017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-14306-yhttps://doaj.org/toc/2045-2322Abstract Real-time and high-resolution target detection is highly desirable in modern radar applications. Electronic techniques have encountered grave difficulties in the development of such radars, which strictly rely on a large instantaneous bandwidth. In this article, a photonics-based real-time high-range-resolution radar is proposed with optical generation and processing of broadband linear frequency modulation (LFM) signals. A broadband LFM signal is generated in the transmitter by photonic frequency quadrupling, and the received echo is de-chirped to a low frequency signal by photonic frequency mixing. The system can operate at a high frequency and a large bandwidth while enabling real-time processing by low-speed analog-to-digital conversion and digital signal processing. A conceptual radar is established. Real-time processing of an 8-GHz LFM signal is achieved with a sampling rate of 500 MSa/s. Accurate distance measurement is implemented with a maximum error of 4 mm within a range of ~3.5 meters. Detection of two targets is demonstrated with a range-resolution as high as 1.875 cm. We believe the proposed radar architecture is a reliable solution to overcome the limitations of current radar on operation bandwidth and processing speed, and it is hopefully to be used in future radars for real-time and high-resolution target detection and imaging.Fangzheng ZhangQingshui GuoShilong PanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fangzheng Zhang Qingshui Guo Shilong Pan Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing
description	Abstract Real-time and high-resolution target detection is highly desirable in modern radar applications. Electronic techniques have encountered grave difficulties in the development of such radars, which strictly rely on a large instantaneous bandwidth. In this article, a photonics-based real-time high-range-resolution radar is proposed with optical generation and processing of broadband linear frequency modulation (LFM) signals. A broadband LFM signal is generated in the transmitter by photonic frequency quadrupling, and the received echo is de-chirped to a low frequency signal by photonic frequency mixing. The system can operate at a high frequency and a large bandwidth while enabling real-time processing by low-speed analog-to-digital conversion and digital signal processing. A conceptual radar is established. Real-time processing of an 8-GHz LFM signal is achieved with a sampling rate of 500 MSa/s. Accurate distance measurement is implemented with a maximum error of 4 mm within a range of ~3.5 meters. Detection of two targets is demonstrated with a range-resolution as high as 1.875 cm. We believe the proposed radar architecture is a reliable solution to overcome the limitations of current radar on operation bandwidth and processing speed, and it is hopefully to be used in future radars for real-time and high-resolution target detection and imaging.
format	article
author	Fangzheng Zhang Qingshui Guo Shilong Pan
author_facet	Fangzheng Zhang Qingshui Guo Shilong Pan
author_sort	Fangzheng Zhang
title	Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing
title_short	Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing
title_full	Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing
title_fullStr	Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing
title_full_unstemmed	Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing
title_sort	photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/fd3097b0047a46ab853f70aacd00d326
work_keys_str_mv	AT fangzhengzhang photonicsbasedrealtimeultrahighrangeresolutionradarwithbroadbandsignalgenerationandprocessing AT qingshuiguo photonicsbasedrealtimeultrahighrangeresolutionradarwithbroadbandsignalgenerationandprocessing AT shilongpan photonicsbasedrealtimeultrahighrangeresolutionradarwithbroadbandsignalgenerationandprocessing
_version_	1718395083365023744

Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing

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