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Maximum Likelihood Sequence Detectors (MLSD) have been largely used to mitigate the Chromatic Dispersion (CD) in Intensity Modulation/Direct Detection (IM/DD) optical communication systems. For practical applications, the high complexity of the receivers remains an important issue. In this paper, we analyze the design of MLSD-based receivers using the Orthogonal Volterra Kernel Model for IM/DD optical communication systems in Metro Optical applications. We discuss the impact in complexity and performance of the main parameters of the model and provide three design options for the MLSD-based receiver. Finally we provide numerical simulations showing the Bit Error Rate (BER) performances of the three considered designs for both On-Off Keying (OOK) and higher order Pulse Amplitude Modulation (PAM).

Design of MLSD-based receivers for short-range optical communications using the Volterra expansion