상세정보
학술지
Real-Time Digital Signal Processing for High-Speed Coherent Optical OFDM Synchronization
- 발행일
- 201506
- 출처
- IEEE/OSA Journal of Lightwave Technology, v.33 no.11, pp.2294-2302
- ISSN
- 0733-8724
- 출판사
- IEEE, OSA
- 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.
- 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