Energy-efficient radio-over-fiber system for next-generation cloud radio access networks

被引:0
作者
Bo Wang
Limei Peng
Pin-Han Ho
机构
[1] Department of Electrical and Computer Engineering University of Waterloo Canada,
[2] School of Computer Science and Engineering,undefined
[3] Kyungpook National University,undefined
来源
EURASIP Journal on Wireless Communications and Networking | / 2019卷
关键词
Radio-over-Fiber (RoF); Cloud radio access network (C-RAN); Energy efficiency; Peak-to-average power ratio (PAPR); Nonlinear distortion;
D O I
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中图分类号
学科分类号
摘要
The paper proposes a novel adaptive radio-over-fiber (RoF) system for next-generation cloud radio access network (C-RAN), aiming to optimize the operation cost in terms of power consumption while maintaining required data rate. By jointly considering the nonlinear distortion from Mach-Zehnder modulator (MZM) and high power amplifier (HPA) due to high peak-to-average-power ratio (PAPR) in the electronic domain, we first provide a 2×2 multiple-input mulitple-output orthogonal frequency division multiplexing (MIMO-OFDM) baseband model on electrical SNR (ESNR) for a single RoF transmission line. To take the modulation levels into consideration, we provide the optical signal to noise ratio (OSNR) analysis that jointly considers the electrical SNR (ESNR) model and the non-linear effect of the optical transmission. This optical SNR (OSNR) analysis result is further used in the subsequent power consumption model for both the downlink and uplink of the considered RoF transmission system. Case studies via simulation and numerical experiments are conducted to verify that the proposed RoF system not only can reach the lowest power and spectrum consumptions at same time, but also consumes considerably less power than current RoF system.
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