Polarisationsdemultiplexierung für mehrstufige Signale

Details

Veröffentlichungs-Nr.

EP2487813

Aktenzeichen

EP11290070

Anmeldetag

1. Februar 2011

Veröffentlichung

17. April 2013

Erteilung

17. April 2013

Rechtsraum

EP

IPC

H04L25/03H04B10/60H04B10/25

Abstract

The present document relates to optical transmission systems. In particular, the present document relates to a system and method for performing polarization de-multiplexing in optical polarization multiplexed transmission systems. An equalizing unit for an input signal is described, wherein the input signal has been amplitude and phase modulated using a modulation scheme, and transmitted over a transmission channel. The equalizing unit (125, 203, 204) comprises a filter (501) adapted to filter the input signal using one or more filter taps, thereby yielding an output signal; wherein the output signal comprises a plurality of output samples having a plurality of output amplitudes, respectively; and a filter adaption unit (502) adapted to determine a first deviation of the output amplitude of at least some of the plurality of output samples from a first threshold; determine a second deviation of the output amplitude of at least some of the plurality of output samples from a second threshold; wherein the second threshold is greater than the first threshold and wherein the first threshold and the second threshold are associated with a first constellation amplitude and second constellation amplitude of constellation points of the modulation scheme, respectively; and update the one or more filter taps based on the first and second deviations.

Anmelder

Firma

Alcatel Lucent

Land

🇫🇷 Frankreich

Fachgebiete