Multiuser detection for WDM fiber-optic communication systems

In fiber-optic WDM communications, the nonlinearity of the channel and the limitations of optical filters result in received channel signals that are correlated. Furthermore, the nonlinear nature of the detector creates a data-dependent asymmetric and non-Gaussian noise. Through bounds on the error probability, the optimal multiuser detector is found to significantly improve performance in highly correlated data cases. This result is applied to a practical WDM system.