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Data-aided channel equalization scheme for FAST radio over fiber transmission system
Zheng, Zhennan1; Su, Zhonghan1; Gao, Xinlu1; Gao, Guanjun1; Ma, Jingcan1; Yang, Jiasi1; Li, Chunsheng2; Huang, Shanguo1; Liu, Hongfei3,4
2021-07-19
Source PublicationOPTICS EXPRESS
ISSN1094-4087
Volume29Issue:15Pages:24525-24535
AbstractThe Five-hundred-meter Aperture Spherical radio Telescope (FAST) located in Guizhou, China, is a very sensitive single dish telescope. Due to the large size of the telescope, optical fiber is used for the transmission of the 3-km astronomical signal from the telescope to the signal processing center. The optical fibers are suspended in the air above the telescope reflector, very easy to slide when the telescope feed cabin moves, resulting in phase drifts for the transmission signal. This phase drift has a negative impact on the observation mode of very long baseline interferometry, and can be compensated by the frequency transfer system in the FAST. In this manuscript, we propose a new phase drift compensation scheme, which is denoted as data-aided channel equalization scheme. The proposed scheme is based on a hypothesis of linear phase relationship between different wavelengths in the same optical fiber, and uses the channel response information of the data-aided channel to conduct signal recovery for the astronomical signal channel. Not only the phase drift, but also the frequency-dependent distortion of the broadband transmission link can be compensated. The proposed scheme has simple transmission structure, and the function part is well modularized, so that the Astronomer users can easily turn it on or off. In the proof-of-concept experiments, the estimation deviation can be significantly reduced by estimated channel responses averaging over training sequence repetitions, showing very high accuracy of the astronomical signal channel estimation. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
DOI10.1364/OE.433320
WOS KeywordFREQUENCY-DOMAIN EQUALIZATION ; SIGNAL TRANSMISSION ; COHERENT ; DISSEMINATION ; RECOVERY
Language英语
Funding ProjectNational Natural Science Foundation of China[61690195] ; National Natural Science Foundation of China[61801038] ; National Natural Science Foundation of China[61821001] ; National Natural Science Foundation of China[U1831110] ; Fundamental Research Funds for the Central Universities[2019XD-A15-2]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
WOS Research AreaOptics
WOS SubjectOptics
WOS IDWOS:000674671200136
PublisherOPTICAL SOC AMER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/76561
Collection中国科学院国家天文台
Corresponding AuthorHuang, Shanguo; Liu, Hongfei
Affiliation1.Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
2.Beijing Blade Tech Ltd, Beijing 100876, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 101408, Peoples R China
Recommended Citation
GB/T 7714
Zheng, Zhennan,Su, Zhonghan,Gao, Xinlu,et al. Data-aided channel equalization scheme for FAST radio over fiber transmission system[J]. OPTICS EXPRESS,2021,29(15):24525-24535.
APA Zheng, Zhennan.,Su, Zhonghan.,Gao, Xinlu.,Gao, Guanjun.,Ma, Jingcan.,...&Liu, Hongfei.(2021).Data-aided channel equalization scheme for FAST radio over fiber transmission system.OPTICS EXPRESS,29(15),24525-24535.
MLA Zheng, Zhennan,et al."Data-aided channel equalization scheme for FAST radio over fiber transmission system".OPTICS EXPRESS 29.15(2021):24525-24535.
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