Cost effective wavelength reused MDM system for bidirectional mobile   fronthaul

doi:10.1364/OE.24.022413

CORC > 北京大学 > 信息科学技术学院

	Cost effective wavelength reused MDM system for bidirectional mobile fronthaul
	Chen, Yuanxiang ; Li, Juhao ; Zhu, Paikun ; Peng, Huanfa ; Zhu, Jinglong ; Tian, Yu ; Wu, Zhongying ; Ge, Dawei ; Zhou, Peng ; Liu, Ke ; Xu, Yongchi ; Chen, Jingbiao ; He, Yongqi ; Chen, Zhangyuan
刊名	OPTICS EXPRESS
	2016
关键词	RADIO ACCESS NETWORKS WDM-PON FIBER TECHNOLOGIES BACKHAUL
DOI	10.1364/OE.24.022413
英文摘要	In this paper, we propose a cost-effective wavelength-reused mode-division-multiplexing (MDM) system for high speed symmetrical bidirectional mobile fronthaul application. At the base band unit (BBU) pool, one of the spatial modes is used to transmit signal carrier while the others are used for downstream (DS) signal channels. At the remote radio unit (RRU) side, the signal carrier is split and reused as modulation carrier for all the upstream (US) signal channels after mode demultiplexing. Thanks to the low mode crosstalk characteristic of the mode multiplexer/demultiplexer (MUX/DEMUX) and few-mode fiber (FMF), the signal carrier and each signal channel can be effectively separated. The spectral efficiency (SE) is significantly enhanced when multiple spatial channels are used. Compared with other wavelength reused scheme in which the downstream and upstream be modulated in orthogonal dimension, the modulation format of both directions are independent in the proposed wavelength reused MDM system. Therefore, it can easily achieve symmetrical bidirectional transmission without residual re-modulation crosstalk. The proposed scheme is scalable to multi-wavelength application when wavelength MUX/DEMUX is utilized. With the proposed scheme, we demonstrate a proof of concept intensity modulated 4 x 25-Gb/s 16-QAM orthogonal frequency division multiplexing (OFDM) transmission over 10-km FMF using low modal-crosstalk two-mode FMF and MUX/DEMUX with error free operation. The downstream receiver sensitivity is -21 dBm while the upstream receiver sensitivity is -18 dBm for bidirectional transmission. Due to the Rayleigh backscattering and other spurious reflections, the upstream suffers 2 dB power penalty compared with unidirectional transmission without downstream. To mitigate bidirectional transmission impairments, we propose a simple and effective method to suppress Rayleigh backscattering by shifting the downstream subcarrier frequency. A receiver sensitivity improvement of up to 2.5 dB is achieved for upstream with different downstream power. (C) 2016 Optical Society of America; National Basic Research Program of China (973 Program) [2014CB340105, 2012CB315606]; National Natural Science Foundation of China (NSFC) [61505002, 61377072, 61275071]; China Postdoctoral Science Foundation (CPSF) [2015M580926, 2016T90015]; SCI(E); EI; ARTICLE; juhao_li@pku.edu.cn; 20; 22413-22422; 24
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/450050]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Chen, Yuanxiang,Li, Juhao,Zhu, Paikun,et al. Cost effective wavelength reused MDM system for bidirectional mobile fronthaul[J]. OPTICS EXPRESS,2016.
APA	Chen, Yuanxiang.,Li, Juhao.,Zhu, Paikun.,Peng, Huanfa.,Zhu, Jinglong.,...&Chen, Zhangyuan.(2016).Cost effective wavelength reused MDM system for bidirectional mobile fronthaul.OPTICS EXPRESS.
MLA	Chen, Yuanxiang,et al."Cost effective wavelength reused MDM system for bidirectional mobile fronthaul".OPTICS EXPRESS (2016).