Experimental Demonstration of an SFO-robustness Scheme with Fast OFDM for IMDD Passive Optical Network Systems
Experimental Demonstration of an SFO-robustness Scheme with Fast OFDM for IMDD Passive Optical Network Systems
复制标题
用于 IMDD 无源光网络系统的具有快速 OFDM 的 SFO 鲁棒性方案的实验演示
DOI：
10.1109/jlt.2020.3004429
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发表时间：
2020
影响因子：
4.7
通讯作者：
Chen Ming
中科院分区：
文献类型：
--
作者：
Zhou Zhihua;He Jing;Ma Jie;Chen Ming
提出了一种采样频偏(SFO)-鲁棒性零填充(ZP)-快速正交频分复用（FOFDM）方案，并在强度调制和直接检测（IMDD）无源光网络（PON）系统中进行了实验验证。它可以用来减轻sfo引起的载波间干扰（ICI）的影响。在存在SFO的情况下，本文提出的FOFDM方案与传统的OFDM方案进行了性能比较。实验结果表明，在相同的频谱效率（SE）和带宽粒度下，由于sfo引起的副载波相位偏移（SPO）在估计误差±0.1 ppm范围内得到补偿，ZP-FOFDM在不同接收光功率（ROP）下的误差矢量幅度（EVM）优于OFDM。此外，当ROP为−1 dBm时，ZP-FOFDM的所有数据子载波的平均误差矢量幅度（EVM）比OFDM高3.3 db。这意味着与OFDM相比，ZP-FOFDM方案可以有效地提高sfo鲁棒性。
A sampling frequency offset (SFO)-robustness scheme with zero padding (ZP)-fast orthogonal frequency-division multiplexing (FOFDM) is proposed and experimentally demonstrated in intensity-modulated and direct-detection (IMDD) passive optical network (PON) systems. It can be used to mitigate the impact of SFO-induced inter-carrier interference (ICI). The performance comparison between the proposed FOFDM scheme and conventional OFDM scheme in the presence of SFO is presented. Experimental results indicate that, as SFO-induced subcarrier phase offset (SPO) is compensated within the estimated error of ±0.1 ppm, at the same spectral efficiency (SE) and bandwidth granularity, the error vector magnitude (EVM) of ZP-FOFDM is superior to the OFDM at different received optical power (ROP). In addition, when the ROP is −1 dBm, the average error vector magnitude (EVM) of all the data subcarriers for ZP-FOFDM is 3.3-dB superior to that of OFDM. It means that the ZP-FOFDM scheme can effectively improve the SFO-robustness compared with OFDM.