Patent ID: 9490908
Filing Date: 2016-11-08
CPC Classification: H04B,H04J

Claim Text:
1. Method of receiving an optical-duo-binary, ODB, signal (S), which has a predefined ODB-transmission bit-rate (B), using a photoreceiver, said method comprising the step of filtering the ODB signal, wherein said ODB signal is filtered using a filter which provides a frequency peak in the photoreceiver's frequency response, said frequency peak being located in the spectral range between 30% and 70% of the predefined ODB-transmission bit-rate, and, wherein before said step of filtering the ODB signal using said filter, the ODB signal (S) is pre-filtered using an optical line pre-filter having a full-width-half-maximum bandwidth of 75% or less of the ODB-transmission bit-rate.