Xieon Networks S.a.r.l.

Deutschetelekom Ag

Nokia Siemens Networks Oy

Norbert Hanik

Bernhard Spinnler

Leonardo Coelho

Oscar Gaete

Ernst-Dieter Schmidt

Oscar Cristobal Gaete Jamett

Herbert Schmid

A method for processing data in an optical network element is provided, wherein a multicarrier signal is linear pre-coded, and wherein the linear pre-coded signal is modulated. An according optical network element is also suggested.

Method for processing data in an optical network element and optical network element

A method for processing data in an optical network element. A multi-carrier signal is linear pre-coded and the linear pre-coded signal is modulated. A corresponding optical network element is also described.

The arrangement includes a transmitter (-) with two optical sources () generating two optical carrier signals (L, L) having different frequencies. The optical carrier signals (L, L) are combined and divided in a first coupler () and fed to carrier signal inputs of two modulators (). The mixed carrier signals (L+jL, jL+L) are separately modulated by two modulation signals (a(t)) and (b(t)) and the modulated signals ((A+jA), (jB+B)) are combined in a first combiner and emitted as transmission signal (X(t)). Only on demodulator is necessary to regain the modulation signals (a(t), b(t)).

Method and apparatus for transmission of two modulated signals via an optical channel

A method for monitoring the transmission quality of an optical transmission system, such as, for example, an optical wavelength division-multiplex network. An amplitude histogram of an optical signal (transmission signal) transmitted over the transmission system may be plotted and classified, with the assistance of a neural network, according to bit error rates and/or causes of faults. The need for setting requirements for transmission mode, transmission format and/or transmission timing cycle of the transmission system may be eliminated. The amplitude histogram may be implemented for any signal, and causes of faults, which are not able to be determined by a conventional bit rate classification, may be allocated.

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Berlin, Germany

Norbert Hanik