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A new version of duobinary polarization-shift keying scheme is proposed. The relocation of the duobinary filter at the receiver side and the optimization of both transmitter and receiver electrical filters offer a receiver sensitivity improvement while maintaining chromatic dispersion tolerance. The main reason for this sensitivity enhancement is the reduction of the timing jitter and the noise narrow filtering provided. Moreover, the system is more tolerant against fiber nonlinear effects.
CitationGene, J. [et al.]. Modified duobinary polarization-shift keying transmission scheme. A: European Conference on Optical Communication. "European conference on optical communication: conference proceedings". Rimini: 2003, p. 818-819.
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