An Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging

A dual channel interleaved broadband subsampling photonic analog-to-digital converter (ADC) immune to channel mismatches capable for high-speed radar imaging is presented. Through modeling as a combination of photonic subsampling front-end and interleaved Nyquist sampling electronic ADC back-end, th...

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Autores principales:	Yirong Xu, Shangyuan Li, Xiaoxiao Xue, Xuedi Xiao, Xiaoping Zheng, Bingkun Zhou
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2019
Materias:	Photonic ADC photonic radar imaging Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/7cd7730993694503a7be6948e4437eca
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spelling	oai:doaj.org-article:7cd7730993694503a7be6948e4437eca2021-11-30T00:00:07ZAn Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging1943-065510.1109/JPHOT.2019.2926399https://doaj.org/article/7cd7730993694503a7be6948e4437eca2019-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/8753539/https://doaj.org/toc/1943-0655A dual channel interleaved broadband subsampling photonic analog-to-digital converter (ADC) immune to channel mismatches capable for high-speed radar imaging is presented. Through modeling as a combination of photonic subsampling front-end and interleaved Nyquist sampling electronic ADC back-end, the mechanism of photonic interleaved subsampling of broadband signal and the appearance of spurious components caused by channel mismatches are explained. The effect of these spurious components on radar detecting is revealed. Through fractional Fourier domain filtering, the spurious components are eliminated, making the SNR of received X-band chirp signal (8–11.9 GHz) improved from 13.26 to 23.88 dB. Thanks to its downsampling and interleaved architecture, the demands of bandwidth, sampling rate, and storage depth for post electronics are all lowered, making it capable for high-speed and mass data receiving. In the experiment, inverse synthetic aperture radar imaging is performed characterized with range and cross range resolution of 4.9 and 7.9 cm. The false target due to the spurious component is distinguished through band-pass filtering in matched fractional Fourier domain.Yirong XuShangyuan LiXiaoxiao XueXuedi XiaoXiaoping ZhengBingkun ZhouIEEEarticlePhotonic ADCphotonic radar imagingApplied optics. PhotonicsTA1501-1820Optics. LightQC350-467ENIEEE Photonics Journal, Vol 11, Iss 4, Pp 1-9 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Photonic ADC photonic radar imaging Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
spellingShingle	Photonic ADC photonic radar imaging Applied optics. Photonics TA1501-1820 Optics. Light QC350-467 Yirong Xu Shangyuan Li Xiaoxiao Xue Xuedi Xiao Xiaoping Zheng Bingkun Zhou An Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging
description	A dual channel interleaved broadband subsampling photonic analog-to-digital converter (ADC) immune to channel mismatches capable for high-speed radar imaging is presented. Through modeling as a combination of photonic subsampling front-end and interleaved Nyquist sampling electronic ADC back-end, the mechanism of photonic interleaved subsampling of broadband signal and the appearance of spurious components caused by channel mismatches are explained. The effect of these spurious components on radar detecting is revealed. Through fractional Fourier domain filtering, the spurious components are eliminated, making the SNR of received X-band chirp signal (8–11.9 GHz) improved from 13.26 to 23.88 dB. Thanks to its downsampling and interleaved architecture, the demands of bandwidth, sampling rate, and storage depth for post electronics are all lowered, making it capable for high-speed and mass data receiving. In the experiment, inverse synthetic aperture radar imaging is performed characterized with range and cross range resolution of 4.9 and 7.9 cm. The false target due to the spurious component is distinguished through band-pass filtering in matched fractional Fourier domain.
format	article
author	Yirong Xu Shangyuan Li Xiaoxiao Xue Xuedi Xiao Xiaoping Zheng Bingkun Zhou
author_facet	Yirong Xu Shangyuan Li Xiaoxiao Xue Xuedi Xiao Xiaoping Zheng Bingkun Zhou
author_sort	Yirong Xu
title	An Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging
title_short	An Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging
title_full	An Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging
title_fullStr	An Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging
title_full_unstemmed	An Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging
title_sort	interleaved broadband photonic adc immune to channel mismatches capable for high-speed radar imaging
publisher	IEEE
publishDate	2019
url	https://doaj.org/article/7cd7730993694503a7be6948e4437eca
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An Interleaved Broadband Photonic ADC Immune to Channel Mismatches Capable for High-Speed Radar Imaging

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