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학술지 Real-Time Digital Signal Processing for High-Speed Coherent Optical OFDM Synchronization
Cited 6 time in scopus Download 6 time Share share facebook twitter linkedin kakaostory
저자
나해영, 윤천주, 권용환, 최해욱
발행일
201506
출처
IEEE/OSA Journal of Lightwave Technology, v.33 no.11, pp.2294-2302
ISSN
0733-8724
출판사
IEEE, OSA
DOI
https://dx.doi.org/10.1109/JLT.2015.2393304
협약과제
14MB1100, 소프트웨어 정의 네트워크(SDN) 기반 Flexible 광노드 핵심기술 개발, 권용환
초록
In high-speed coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems, wide range estimation of carrier frequency offset (CFO) and hardware-efficient symbol timing synchronization are essential. The CFO estimation using the Chinese remainder theorem (CRT) was recently proposed to provide wide range estimation. In this paper, the feasibility of the proposed CRT-based CFO estimation method is demonstrated in a real-time CO-OFDM system. We also propose two-step symbol timing synchronization with simplified timing metric for CO-OFDM systems. The real-time experimental results show that the CRT-based CFO algorithm can estimate over a wide range corresponding to the sampling frequency and hardware efficient accurate symbol timing synchronization is achieved by the proposed synchronization method.
키워드
Carrier frequency offset, OFDM, optical fiber communication, symbol timing synchronization
KSP 제안 키워드
CFO estimation, Carrier Frequency Offset, Chinese remainder theorem(CRT), Coherent optical orthogonal frequency division multiplexing(CO-OFDM), Digital Signal Processing, Digital signal processor(DSP), Estimation method, Hardware efficient, High Speed, OFDM synchronization, OFDM systems