Chinese Optics Letters, 2016, 14 (2): 020601, Published Online: Sep. 21, 2018
Pilot-added carrier-phase recovery scheme for Nyquist M-ary quadrature amplitude modulation optical fiber communication system Download: 949次
Figures & Tables
Fig. 1. (a) Proposed PA dual-carriers Nyquist transmission system. (b) Electrical Nyquist signal generation.
Fig. 2. DSP implementation of the multi-stage carrier-phase estimation scheme. The evolutions of the 32-QAM and 128-QAM constellations are shown in two stages.
Fig. 3. Transformation procedures of 128-QAM and 32-QAM into the crossed-signal constellation.
Fig. 4. BER surface versus PSR and the bandwidth of the pilot LPF at two different laser linewidths for 32-QAM.
Table1. Linewidth Tolerance of Various CPR Schemes for 32- and 128-QAM
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Wenbo Zhang, Dongwei Pan, Xiaofei Su, Xiaoguang Zhang, Lixia Xi, Xianfeng Tang. Pilot-added carrier-phase recovery scheme for Nyquist M-ary quadrature amplitude modulation optical fiber communication system[J]. Chinese Optics Letters, 2016, 14(2): 020601.