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학술지 Channel Estimation and Synchronization for Polarization-Division Multiplexed CO-OFDM Using Subcarrier/Polarization Interleaved Training Symbols
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저자
윤천주, Xiang Liu, S. Chandrasekhar, 권용환, 김종회, 최중선, 김덕준, 최광성, 남은수
발행일
201108
출처
Optics Express, v.19 no.17, pp.16174-16181
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.19.016174
협약과제
10MB7400, 차세대 대용량 코히어런트 광OFDM 기술개발, 남은수
초록
We propose and demonstrate the use of subcarrier/polarizationinterleaved 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. © 2011 Optical Society of America.
KSP 제안 키워드
16 quadrature amplitude modulation(16QAM), Channel estimation(CE), Coherent optical orthogonal frequency division multiplexing(CO-OFDM), Computational Efficiency, Local Oscillator, OFDM transmission, Offset tolerance(OT), Subcarrier modulation, Ultra-large, frequency offset, large area