Pilot tone design for dispersion estimation in coherent optical fast OFDM systems

Zhao, J. and Ellis, A.D. (2013). Pilot tone design for dispersion estimation in coherent optical fast OFDM systems. Optics Communications, 298-29 , pp. 75-78.

Abstract

We show that inserting pilot tones with frequency intervals inversely proportional to the subcarrier index exhibits greatly improved dispersion estimation performance when compared to the equal spacing design in optical fast orthogonal frequency division multiplexing (F-OFDM). With the proposed design, a 20-Gbit/s four amplitude shift keying optical F-OFDM system with 840-km transmission without optical dispersion compensation is experimentally demonstrated. It is shown that a single F-OFDM symbol with six pilot tones can achieve near-optimal estimation performance for the 840-km dispersion. This is in contrast to the minimum of ten pilot tones using an equal spacing design with either cubic or Fourier-transform-based interpolation.

Publication DOI: https://doi.org/10.1016/j.optcom.2013.02.042
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: Copyright © 2013 Elsevier B.V. All rights reserved.
Uncontrolled Keywords: optical fast OFDM,dispersion,coherent detection
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2013-07-01
Authors: Zhao, J.
Ellis, A.D. ( 0000-0002-0417-0547)

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