Real-Time Digital Signal Processing for High-Speed Coherent Optical OFDM Synchronization
| Autor: | Hae Young Rha, Yong-Hwan Kwon, Hae-Wook Choi, Chun Ju Youn |
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| Rok vydání: | 2015 |
| Předmět: |
Range (mathematics)
Signal processing business.industry Computer science Orthogonal frequency-division multiplexing Carrier frequency offset Synchronization (computer science) Metric (mathematics) Electronic engineering business Chinese remainder theorem Atomic and Molecular Physics and Optics Digital signal processing |
| Zdroj: | Journal of Lightwave Technology. 33:2294-2302 |
| ISSN: | 1558-2213 0733-8724 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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