Simple and Robust Chromatic Dispersion Estimation for RGI-CO-OFDM Systems

Author

Xian Zhou ; Zheng Yan ; Xue Chen ; Keping Long

Author_Institution

Beijing Eng. & Technol. Res. Center for Convergence Networks & Ubiquitous Services, Univ. of Sci. & Technol. Beijing, Beijing, China

Volume

25

Issue

13

fYear

2013

fDate

1-Jul-13

Firstpage

1222

Lastpage

1225

Abstract

Because of the variations of transmission route and environment, reduced-guard interval coherent optical orthogonal frequency-division multiplexing (RGI-CO-OFDM) has difficulty removing chromatic dispersion (CD) accurately by the use of over-lapped frequency domain equalizer (OFDE) according to the predicted CD value. To make RGI-CO-OFDM systems adaptive to CD change without extra cyclic prefix (CP) overhead, an effective CD estimation (CDE) algorithm is proposed to calibrate the CD compensation value of OFDE. The detailed simulation results prove the excellent abilities of the proposed CDE algorithm to resist inter-symbol interference and suppress amplified spontaneous emission noise. Comparing with the traditional RGI-CO-OFDM systems, its tolerable dynamic CD range can be increased >30 times at the same training symbols and CP overheads at the transmission rate of 480 Gb/s.

Keywords

OFDM modulation; compensation; equalisers; intersymbol interference; optical fibre communication; optical fibre dispersion; superradiance; CD compensation; CD estimation; OFDE; RGI-CO-OFDM systems; amplified spontaneous emission noise; chromatic dispersion estimation; dynamic CD; intersymbol interference; overlapped frequency domain equalizer; reduced-guard interval coherent optical orthogonal frequency-division multiplexing; Chromatic dispersion estimation; RGI-CO-OFDM; channel transfer function; guard interval;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2263787

Filename

6522475