Fast dispersion estimation in coherent optical 16QAM fast OFDM systems | Zendy

Jian Zhao | Zendy; Haymen Shams | Zendy

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Fast 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.

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