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

J. Zhao; A.D. Ellis

doi:10.1016/j.optcom.2013.02.042

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

J. Zhao, A.D. Ellis

Aston Institute of Photonic Technologies (AiPT)

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	75-78
Number of pages	4
Journal	Optics Communications
Volume	298-299
Early online date	7 Mar 2013
DOIs	https://doi.org/10.1016/j.optcom.2013.02.042
Publication status	Published - 1 Jul 2013

Bibliographical note

Keywords

optical fast OFDM
dispersion
coherent detection

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10.1016/j.optcom.2013.02.042

Pilot tone design for dispersion estimation
Copyright © 2013 Elsevier B.V. All rights reserved.
Accepted author manuscript, 218 KB

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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.",

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AU - Ellis, A.D.

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N2 - 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.

AB - 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.

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KW - dispersion

KW - coherent detection

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JO - Optics Communications

JF - Optics Communications

ER -

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

Abstract

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Keywords

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