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Joint scheme for symbol,sampling clock,and carrier frequency synchronization in PDM-CO-OFDM system beyond 100 Gb/s

Joint scheme for symbol,sampling clock,and carrier frequency synchronization in PDM-CO-OFDM system beyond 100 Gb/s
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摘要 We propose a joint scheme for symbol, sampling clock, and carrier frequency synchronization in a polarization division multiplexing coherent optical orthogonal frequency division multiplexing (PDM-CO-OFDM) system. Unlike other existing algorithms designed for specific impairment, the scheme can estimate and compensate for the interactional synchronization errors effectively without extra training overhead by building a comprehensive error model. The simulation shows that symbol synchronization error and sample timing error can be corrected by channel equalizer, and the estimation ranges of sampling frequency offset and normalized carrier frequency offset are about (-2000, 2000) ppm, and (-0.04 (-3.5), 0.04 (3.5)) Ghz, respectively. We propose a joint scheme for symbol, sampling clock, and carrier frequency synchronization in a polarization division multiplexing coherent optical orthogonal frequency division multiplexing (PDM-CO-OFDM) system. Unlike other existing algorithms designed for specific impairment, the scheme can estimate and compensate for the interactional synchronization errors effectively without extra training overhead by building a comprehensive error model. The simulation shows that symbol synchronization error and sample timing error can be corrected by channel equalizer, and the estimation ranges of sampling frequency offset and normalized carrier frequency offset are about (-2000, 2000) ppm, and (-0.04 (-3.5), 0.04 (3.5)) Ghz, respectively.
出处 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第10期20-26,共7页 中国光学快报(英文版)
基金 supported by the National 863 Program of China(No.2012AA011303) the Fund of Sate Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications),China
关键词 Clocks Frequency allocation Frequency estimation Local area networks Signal encoding SYNCHRONIZATION Clocks Frequency allocation Frequency estimation Local area networks Signal encoding Synchronization
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