Patent ID: 9584260
Date: 2017-02-28
CPC Classifications: H04B,H04J,H04L

Claim:
1. A method comprising: receiving a data signal from an interface; encoding and modulating the data signal with a Forward Error Correcting (FEC) encoder and according to a first modulation format and a second modulation format to generate an FEC encoded signal; generating, from the FEC encoded signal, a first plurality of symbols according to the first modulation format and a second plurality of symbols according the second modulation format; interleaving the first plurality of symbols with the second plurality of symbols across time and optical polarization, such that, during a first time period, at least one of the first plurality of symbols is transmitted with a first polarization and at least one of the second plurality of symbols is transmitted with a second polarization, and, during a second time period, at least one of the first plurality of symbols is transmitted with the second polarization and at least one of the second plurality of symbols is transmitted with the first polarization; spectrally shaping the first and second plurality of symbols to generate, respectively, a first shaped signal and a second shaped signal; pre-distorting the first and second shaped signals by adding a predetermined amount of chromatic dispersion to generate, respectively, a first smoothed signal and a second smoothed signal; and optically transmitting the first and second smoothed signals.