Xieon Networks S.a.r.l.

Huawei Technologies Co., Limited

Maxim Kuschnerov

Bernhard Spinnler

Stefano Calabro

Changsong Xie

Berthold Lankl

Fabian N Hauske

Antonio Napoli

Alessandro Bianciotto

Kittipong Piyawanno

Fabio Pittala

Mahdi Mezghanni

Stefano Calabró

Maximilian Schaedler

Nguyen Binh Le

Christian Blümm

A transmitting device configured to obtain a message to be transmitted; map the obtained message onto a two-dimensional 2-symbol constellation to obtain a sequence of discrete constellation symbols, where n is an odd number not less than 3. A receiving device configured to receive a sequence of noisy discrete constellation symbols; demap the sequence of noisy discrete constellation symbols to output data using a two-dimensional 2-symbol constellation, where n is an odd number not less than 3.

Class of symbol constellations for data transmission

The invention presents an equalizing device, a corresponding method and an optical signal with a frame structure for enabling the method. The equalizing device includes a first 2&#xd7;2 MIMO equalizer configured to perform a first equalization on the digital signal, supported by a 2&#xd7;2 MIMO channel estimation of the channel based on the digital signal. Further, the device includes a second 2&#xd7;2 MIMO equalizer, arranged after the first equalizer and configured to perform a second equalization on the digital signal, supported by a State of Polarization (SOP) estimation of the optical signal based on the digital signal.

Equalizing device for compensating rapid state of polarization changes of an optical signal

Disclosed herein is a dual parallel Mach-Zehnder-modulator (DPMZM) device comprising a DPMZMhaving first and second inner MZMs arranged parallel to each other. The first inner MZM generates an in-phase component Eof an optical signal in response to a first driving voltage V, and the second inner MZM generates a quadrature component Eof said optical signal in response to a second driving voltage V. Further disclosed is a calculation unitconfigured for receiving an in-phase component yand a quadrature component yof a desired base-band signal, and for calculating pre-distorted first and second driving voltages V, V. The calculation of the pre-distorted first and second driving voltages V, Vis based on a model of said DPMZMaccounting for I-Q cross-talk, and using an algorithm that determines said first and second driving voltages V, Veach as a function of both of said in-phase and quadrature components y, yof said base-band signal.

Dual parallel Mach-Zehnder-modulator device with pre-distorted driving voltages

The invention describes a method and an arrangement for transmitting an optical transmission signal with reduced polarization-dependent loss. A first transmission signal component and a second orthogonal transmission signal component of the optical transmission signal are transmitted with a time difference between said transmission signal components.

Method and arrangement for transmitting an optical transmission signal with reduced polarisation-dependent loss

A received optical signal is coherently demodulated and converted into electrical complex samples (p(n); (px(n), py(n)), which are dispersion compensated in a compensation filter (). A control circuit () calculates comparison values (R, R) from corrected samples q(n) and an estimated error value (&#x3b5;). A plurality of compensation function (T(M)) is applied according to a predetermined dispersion (CD) range and after a second iteration is the compensation filter () set to an optimum compensation function (T(M)).

Method and arrangement for adaptive dispersion compensation

A method and a device are provided for data processing. The data contains symbols and a control parameter is determined based on a correlation property of the symbols of the data. In this manner signal recovery is achieved that is robust against any kind of distortion and is fast enough to track time varying clocking disturbances. Further, a communication system is provided containing such a device.

Method and device for processing data and communication system comprising such device

A received optical signal is coherently demodulated and converted into electrical complex samples, which are dispersion compensated in a compensation filter. A control circuit calculates comparison values from corrected samples and an estimated error value. A plurality of compensation functions is applied according to a predetermined dispersion range and after a second iteration, the compensation filter is set to an optimum compensation function.

A method and a device are provided for phase recovery of at least two channels comprising the steps of (i) a phase is estimated for each channel; (ii) the phase estimated of each channel is superimposed by a coupling factor with at least one other phase estimated. Further, a communication system is suggested comprising such a device.

Method and device for phase recovery and communication system comprising such device

A received optical signal is coherently demodulated and converted into orthogonal x-polarization samples, and y-polarization samples. These samples are converted into signal x-samples and signal y-samples by an FIR butterfly filter. Correction values are calculated in an error calculating circuit of a control unit and added to filter transfer functions derived by a standard algorithm to determine corrected filter coefficients. Degenerate convergences calculating the transfer functions are avoided.

Growing community of inventors

Munich, Germany

Maxim Kuschnerov