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Fiber-based optical parametric amplifier for 40-Gb/s NRZ-DPSK signal transmission system employing QC-LDPC codes

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【Author】 Jian Zheng;Hongxia Bie;Xuekun Zhang;Chunyang Lei;Ming Fang;Sha Li;Zhe Kang;School of Information and Communication Engineering,Beijing University of Posts and Telecommunication;Department of Medical Information Engineering,Zunyi Medical College;State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunication;

【机构】 School of Information and Communication Engineering,Beijing University of Posts and Telecommunication； Department of Medical Information Engineering,Zunyi Medical College； State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunication；

【摘要】 In this letter, we investigate quasi-cyclic low-density parity-check(QC-LDPC) codes in a 40-Gb/s nonreturn-to-zero differential phase-shift keying(NRZ-DPSK) signal transmission system based on a fiberbased optical parametric amplifier(FOPA). A constructed algorithm of QC-LDPC codes according to the optimizing set of shift values on the circulant permutation matrix(CPM) of the basis matrix is proposed.Simulation results prove that the coding gain in the encoded system can be realized at 10.2 dB under QCLDPC codes with a code rate of 5/6 when the bit error rate(BER) is 10-9. In addition, the error-floor level originating from the uncoded system is suppressed.更多还原

【Abstract】 In this letter, we investigate quasi-cyclic low-density parity-check(QC-LDPC) codes in a 40-Gb/s nonreturn-to-zero differential phase-shift keying(NRZ-DPSK) signal transmission system based on a fiberbased optical parametric amplifier(FOPA). A constructed algorithm of QC-LDPC codes according to the optimizing set of shift values on the circulant permutation matrix(CPM) of the basis matrix is proposed.Simulation results prove that the coding gain in the encoded system can be realized at 10.2 dB under QCLDPC codes with a code rate of 5/6 when the bit error rate(BER) is 10-9. In addition, the error-floor level originating from the uncoded system is suppressed.更多还原

【关键词】 DPSK； amplifier； codes； parity； parametric； floor； decoder； suppressed； decoding； Tanner；

【基金】 supported by the National Natural Science Foundation of China(No.41174158);the National Commonwealth Research Project of China(No.201011081-4)

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2013年11期

【分类号】TN914.3
【被引频次】4
【下载频次】39

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