Channel estimation and synchronization for polarization-division multiplexed CO-OFDM using subcarrier/polarization interleaved training symbols

Channel estimation and synchronization for polarization-division multiplexed CO-OFDM using subcarrier/polarization interleaved training symbols

We propose and demonstrate the use of subcarrier/polarization-interleaved training symbols for channel estimation and synchronization in polarization-division multiplexed (PDM) coherent optical orthogonal frequency-division multiplexed (CO-OFDM) transmission. The principle, the computational efficie...

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Bibliographic Details
Published in:Optics express Vol. 19; no. 17; pp. 16174 - 16181
Main Authors: Youn, Chun Ju, Liu, Xiang, Chandrasekhar, S, Kwon, Yong-Hwan, Kim, Jong-Hoi, Choe, Joong-Seon, Kim, Duk-Jun, Choi, Kwang-Seong, Nam, Eun Soo
Format: Journal Article
Language:English
Published: United States 15-08-2011
Online Access:Get full text
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Summary:We propose and demonstrate the use of subcarrier/polarization-interleaved training symbols for channel estimation and synchronization in polarization-division multiplexed (PDM) coherent optical orthogonal frequency-division multiplexed (CO-OFDM) transmission. The principle, the computational efficiency, and the frequency-offset tolerance of the proposed method are described. We show that the use of subcarrier/polarization interleaving doubles the tolerance to the frequency offset between the transmit laser and the receiver's optical local oscillator as compared to conventional schemes. Using this method, we demonstrate 43-Gb/s PDM CO-OFDM transmission with 16-QAM subcarrier modulation over 5,200-km of ultra-large-area fiber.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.016174