Juniper Networks, Inc.
METHODS AND APPARATUS FOR OPTICAL COMMUNICATIONS VIA PULSE AMPLITUDE MODULATION (PAM) IN DENSE WAVELENGTH-DIVISION MULTIPLEXING (DWDM) SYSTEMS

Abstract:

A method includes applying, to a modulated digital signal, a forward error correction (FEC) including a low-density parity-check (LDPC) to produce a coded digital signal. Nyquist shaping is applied to the coded digital signal to generate a filtered digital signal. A representation of the filtered digital signal is transmitted in an optical communication channel via a dense wavelength division multiplexing (DWDM) scheme.