Symbol synchronization exploiting the symmetric property in optical fast OFDM
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Accepted Version
Date
2011-05
Authors
Zhao, Jian
Ibrahim, Selwan K.
Rafique, Danish
Gunning, Paul
Ellis, Andrew D.
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Published Version
Abstract
We propose a new simple method to achieve precise symbol synchronization using one start-of-frame (SOF) symbol in optical fast orthogonal frequency-division multiplexing (FOFDM) with subchannel spacing equal to half of the symbol rate per sub-carrier. The proposed method first identifies the SOF symbol, then exploits the evenly symmetric property of the discrete cosine transform in FOFDM, which is also valid in the presence of chromatic dispersion, to achieve precise symbol synchronization. We demonstrate its use in a 16.88-Gb/s phase-shifted-keying-based FOFDM system over a 124-km field-installed single-mode fiber link and show that this technique operates well in automatic precise symbol synchronization at an optical signal-to-noise ratio as low as 3 dB and after transmission.
Description
Keywords
Detection , Modulation , Orthogonal frequency-division multiplexing (OFDM) , Wavelength-division multiplexing
Citation
Zhao, JA, Ibrahim, SK, Rafique, D, Gunning, P, Ellis, AD (2011) 'Symbol Synchronization Exploiting the Symmetric Property in Optical Fast OFDM'. IEEE Photonics Technology Letters, 23 (9):594-596. doi: 10.1109/LPT.2011.2118195
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