Modified frequency-domain channel-estimation based on the dual-dependent pilots for polarization-division-multiplexed coherent optical orthogonal frequency division multiplexing systems with offset-quadrature-amplitude modulation

doi:10.1117/1.OE.61.6.066109

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	Modified frequency-domain channel-estimation based on the dual-dependent pilots for polarization-division-multiplexed coherent optical orthogonal frequency division multiplexing systems with offset-quadrature-amplitude modulation
	Wang, Daobin 1; Zhang, Shuo 1; Liu, Junjie 1; Yuan, Lihua 1; Gao, Guanjun 2
刊名	OPTICAL ENGINEERING
	2022-06-01
卷号	61 期号:6
关键词	orthogonal frequency division multiplexing polarization division multiplexing channel response coherent optical transmission system
ISSN号	0091-3286
DOI	10.1117/1.OE.61.6.066109
英文摘要	In the past, several frequency-domain channel-estimation methods were proposed for coherent optical orthogonal frequency division multiplexing systems, which use offset-quadrature-amplitude modulation (CO-OFDM-OQAM). A common challenge for these methods is that the training sequences they use, even though they increase the magnitude of the pseudo-pilots, can make the peak-to-average power ratio (PAPR) of the signal worse. To address this problem, an innovative modified frequency-domain channel estimation method is designed and investigated for a polarization-division-multiplexed CO-OFDM-OQAM system that uses dual-dependent pilots. The operating principle of this new method is described in detail. Then, its PAPR performance and channel-estimation capability are examined using numerical simulations. The proposed method not only ensures a sufficiently large magnitude of the pseudo-pilot but also does not seriously degrade the PAPR of the signal. It is also found that the magnitude of its pseudo-pilot (2.3136) exceeds that of the interference approximation method with real pilots (1.1086), and it is only slightly worse than that of the enhanced IAM with complex pilots (2.6074). The PAPR of the new method (max 11.4 dB) is much lower than that of other frequently used methods. Finally, the channel-estimation capability of the proposed method is validated for both back-to-back and long-distance transmission scenarios. Furthermore, the BER performance of several different channel-estimation methods is also compared. The obtained results confirm the above observations. (C) 2022 Society of Photo-Optical Instrumentation Engineers (SPIE)
WOS研究方向	Optics
语种	英语
出版者	SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
WOS记录号	WOS:000819585200050
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158905]
专题	理学院兰州理工大学
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou, Peoples R China; 2.Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Daobin,Zhang, Shuo,Liu, Junjie,et al. Modified frequency-domain channel-estimation based on the dual-dependent pilots for polarization-division-multiplexed coherent optical orthogonal frequency division multiplexing systems with offset-quadrature-amplitude modulation[J]. OPTICAL ENGINEERING,2022,61(6).
APA	Wang, Daobin,Zhang, Shuo,Liu, Junjie,Yuan, Lihua,&Gao, Guanjun.(2022).Modified frequency-domain channel-estimation based on the dual-dependent pilots for polarization-division-multiplexed coherent optical orthogonal frequency division multiplexing systems with offset-quadrature-amplitude modulation.OPTICAL ENGINEERING,61(6).
MLA	Wang, Daobin,et al."Modified frequency-domain channel-estimation based on the dual-dependent pilots for polarization-division-multiplexed coherent optical orthogonal frequency division multiplexing systems with offset-quadrature-amplitude modulation".OPTICAL ENGINEERING 61.6(2022).