Hexagonal QAM-Based Four-Dimensional AMO-OFDM for Spectrally Efficient Optical Access Network Transmission

被引：4

作者：

Park, Hyoung Joon ^{[1
]}

Kang, Soo-Min ^{[1
]}

Ha, Inho ^{[1
]}

Han, Sang-Kook ^{[1
]}

机构：

[1] Yonsei Univ, Dept Elect & Elect Engn, Seoul 03722, South Korea

来源：

IEEE ACCESS | 2019年 / 7卷

基金：

新加坡国家研究基金会;

关键词：

Multidimensional symbol mapping; hexagonal QAM; orthogonal frequency-division multiplexing (OFDM); adaptive modulation; passive optical network (PON); RECTANGULAR QAM; PON; ASER;

D O I：

10.1109/ACCESS.2019.2957844

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A novel spectrally efficient optical transmission in a passive optical network (PON) with hexagonal quadrature amplitude modulation (QAM)-based adaptive modulated optical (AMO) orthogonal frequency division multiplexing (OFDM) is proposed and experimentally demonstrated. With the help of hexagonalQAMand 4-dimensional (4D) modulation, adaptive bit loading is effectively processed to enhance the total data rate. In this approach, some subcarriers are aggregated to transmit integer bits. To employ hexagonal QAM-based 4D AMO-OFDM, the signal to noise (SNR) ratio is calculated using the measured error vector magnitude of the training signal. In our experiment, hexagonal QAM-based 4D AMO-OFDM transmission with a total data rate of 21 Gbps is demonstrated over a 20 km standard single mode fiber for two optical network units (ONUs). The experimental results show that the total data rate obtained using the proposed method is increased by 14% compared to the conventional square QAM-based AMO-OFDM.

引用

页码：176814 / 176819

页数：6

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