Experimental demonstration of improved fiber nonlinearity tolerance for unique-word DFT-spread OFDM systems

被引：47
|
作者：
Chen, Xi [1 ]
Li, An [1 ,2 ]
Gao, Guanjun [1 ,3 ]
Shieh, William [1 ,2 ]
机构：
[1] Univ Melbourne, Dept Elect & Elect Engn, Melbourne, Vic 3010, Australia
[2] Ctr Energy Efficient Telecommun CEET, Melbourne, Vic 3010, Australia
[3] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
来源：
OPTICS EXPRESS | 2011年 / 19卷 / 27期
基金：
澳大利亚研究理事会;
关键词：
MAXIMUM-LIKELIHOOD PHASE; COHERENT; TRANSMISSION;
D O I：
10.1364/OE.19.026198
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper we experimentally demonstrate transmission performance of optical DFT-spread OFDM systems in comparison with conventional OFDM systems. A 440.8-Gb/s superchannel consisting of 8 x 55.1-Gb/s densely-spaced DFT-S OFDM signal is successfully received after 1120-km transmission with a spectral efficiency of 3.5 b/s/Hz. It is shown that DFT-S OFDM can achieve an improvement of 1 dB in Q factor and 1 dB in launch power over conventional OFDM. Additionally, unique word aided phase estimation algorithm is proposed and demonstrated enabling extremely long OFDM symbol transmission. (C)2011 Optical Society of America
引用
收藏
页码：26198 / 26207
页数：10
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