Open AccessFast dispersion estimation in coherent optical 16QAM fast OFDM systems
Author(s) -
Jian Zhao,
Haymen Shams
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.002500
Subject(s) - orthogonal frequency division multiplexing , computer science , transmission (telecommunications) , channel (broadcasting) , quadrature amplitude modulation , optics , dispersion (optics) , payload (computing) , electronic engineering , overhead (engineering) , optical communication , modulation (music) , network packet , bit error rate , telecommunications , physics , computer network , engineering , operating system , acoustics
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.