Digital Radio Frequency Transport over Optical Fiber for 5G Fronthaul Links

被引：8

作者：

Hadi M.U. ^{[1
]}

Jung H. ^{[2
,3
]}

Traverso P.A. ^{[1
]}

Tartarini G. ^{[1
]}

机构：

[1] Department of Electronic and Information Engineering, University of Bologna, Viale Del Risorgmento 2, Bologna

[2] Nokia Bell Labs, Sunnyvale, CA

[3] Dmc R&d, Bell Labs, Seoul

来源：

Journal of Optical Communications | 2022年 / 43卷 / 04期

关键词：

ACLR; bandpass sampling; EVM; radio over fiber;

D O I：

10.1515/joc-2019-0051

中图分类号：

学科分类号：

摘要：

Radio over fiber (RoF) is an empowering technology for the next-generation wireless networks including fifth generation cloud radio access networks. In this paper, we propose a new fronthaul interface which has been demonstrated for a 20-MHz LTE signal having 64-Quadrature amplitude modulation (QAM) modulation over 50 km of standard single-mode fiber. The proposed methodology potentially reduces the overall bandwidth requirement of the link. The performance analysis has been demonstrated for conventional analog RoF (A-RoF) and proposed digital RoF (D-RoF). As a figure of merit, the performance evaluation of the two architectures is reported by analyzing error vector magnitude (EVM), signal-to-noise ratio and eye-opening penalty. It is shown that digital optical links can mitigate the impairments present in A-RoF links and can support the transmission up to 50 km. Moreover, it is shown that efficient D-RoF links can be obtained with a relatively low amount of analog-to-digital-converter resolution bits. For the D-RoF link, the EVM was measured to be less than 2 % at 50 km. This is within the LTE specifications, proving it as a cost and power effective solution for next-generation wireless networks. © 2019 Walter de Gruyter GmbH, Berlin/Boston.

引用

页码：641 / 647

页数：6

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