Compensation for optical multi-path interference

摘要

Systems and methods for optical multi-path interference (MPI) compensation are provided. In an embodiment, a mean MPI signal representing a mean amplitude of the MPI in an input signal is generated and subtracted from a first estimate of transmitted amplitude of the input signal to generate a mean MPI compensated estimate of transmitted amplitude. The mean MPI compensated estimate of transmitted amplitude is sliced to generate a decision of transmitted amplitude of the input signal. The mean MPI signal can be generated using a mean MPI feedback loop or using an iterative feed-forward process. In another embodiment, mean MPI levels corresponding to respective transmitted intensity levels are generated and used to control slice levels of a slicer in order to compensate for MPI.

主权项

1. A system for compensating for optical multi-path interference (MPI) in an input signal received over an optical fiber, comprising:
a converter module configured to receive an estimate of a transmitted light intensity of the input signal and to generate a first estimate of a transmitted amplitude of the input signal; and a slicer configured to receive a mean MPI compensated estimate of the transmitted amplitude of the input signal and to generate a decision of the transmitted amplitude of the input signal, wherein the mean MPI compensated estimate of the transmitted amplitude of the input signal is determined based on the first estimate of the transmitted amplitude of the input signal and a mean MPI signal representative of a mean of the optical MPI.