Fast dispersion estimation in coherent optical 16QAM fast OFDM systems

被引：26
|
作者：
Zhao, J. [1 ]
Shams, H.
机构：
[1] Natl Univ Ireland Univ Coll Cork, Photon Syst Grp, Tyndall Natl Inst, Cork, Ireland
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 02期
基金：
爱尔兰科学基金会;
关键词：
D O I：
10.1364/OE.21.002500
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Fast channel estimation is crucial to increase the payload efficiency which is of particular importance for optical packet networks. In this paper, we propose a novel least-square based dispersion estimation method in coherent optical fast OFDM (F-OFDM) systems. Additionally, we experimentally demonstrate for the first time a 37.5 Gb/s 16QAM coherent F-OFDM system with 480 km transmission using the proposed scheme. The results show that this method outperforms the conventional channel estimation methods in minimizing the overhead load. A single training symbol can achieve near-optimum channel estimation without any prior information of the transmission distance. This makes optical F-OFDM a very promising scheme for the future burst-mode applications. (C) 2013 Optical Society of America
引用
收藏
页码：2500 / 2505
页数：6
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