Patent application number | Description | Published |
20090067833 | METHOD AND ARRANGEMENT FOR TRANSMITTING AN OPTICAL OFDM-SIGNAL - From an real valued OFDM signal (S | 03-12-2009 |
20110002423 | METHOD AND DEVICE FOR PROCESSING DATA AND COMMUNICATION SYSTEM COMPRISING SUCH DEVICE - 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. | 01-06-2011 |
20110033191 | METHOD AND DEVICE FOR PHASE RECOVERY AND COMMUNICATION SYSTEM COMPRISING SUCH DEVICE - 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. | 02-10-2011 |
20110222865 | METHOD AND APPARATUS FOR TRANSMISSION OF TWO MODULATED SIGNALS VIA AN OPTICAL CHANNEL - The arrangement includes a transmitter ( | 09-15-2011 |
20110305453 | METHOD AND ARRANGEMENT FOR ADAPTIVE DISPERSION COMPENSATION - 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. | 12-15-2011 |
20120084619 | METHOD AND ARRANGEMENT FOR BLIND DEMULTIPLEXING A POLARISATION DIVERSITY MULTIPLEX SIGNAL - A received optical signal (S | 04-05-2012 |
20120224866 | 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. | 09-06-2012 |
20120308234 | CLOCK RECOVERY METHOD AND CLOCK RECOVERY ARRANGEMENT FOR COHERENT POLARIZATION MULTIPLEX RECEIVERS - Component signal values are derived from component signals and fed to at least one fixed equalizer which generates equalizer output signals. The signals are fed to phase error detectors generating phase error signals. The phase error signals are combined with further phase error signals derived by further error detectors receiving signal values from further equalizers and/or the component signal values directly from sample units. | 12-06-2012 |
20130045015 | METHOD AND ARRANGEMENT FOR SIGNAL PROCESSING IN A COMMUNICATION SYSTEM - A signal processing method and a signal processing arrangement for coherent receivers are provided. The method includes the steps of receiving a coherent complex signal, extracting orthogonal in-phase and quadrature signal components from the coherent complex signal, quantizing the orthogonal signal components independently, combining the quantized orthogonal signal components as real and imaginary part of a complex number resulting in a first signal, and soft differential decoding the first signal resulting in a second signal. | 02-21-2013 |
20140003822 | OPTICAL COMMUNICATION APPARATUS AND METHOD | 01-02-2014 |
20140044439 | METHOD AND APPARATUS FOR TRANSMISSION OF TWO MODULATED SIGNALS VIA AN OPTICAL CHANNEL - A transmitter with two optical sources generates two optical carrier signals having different frequencies. The optical carrier signals are combined and divided in a first coupler and fed to carrier signal inputs of two modulators. The mixed carrier signals are separately modulated by two modulation signals (a(t)) and (b(t)) and the modulated signals are combined in a first combiner and emitted as transmission signal. Only one demodulator is necessary to regain the modulation signals (a(t) and b(t)). | 02-13-2014 |
20140112424 | METHOD AND SYSTEM FOR CLOCK RECOVERY WITH ADAPTIVE LOOP GAIN CONTROL - A method for phase recovery in a system that includes a clock recovery unit and an estimation unit. The clock recovery unit of the system has a first phase detector unit. The estimation unit has a second phase detector unit and it is configured to estimate a gain of the second phase detector unit. The estimation unit and the clock recovery unit are configured to operate in parallel. | 04-24-2014 |
20140294387 | METHOD AND ARRANGEMENT FOR ADAPTIVE DISPERSION COMPENSATION - 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 ( | 10-02-2014 |
20140341576 | METHOD FOR PROCESSING DATA IN AN OPTICAL NETWORK ELEMENT AND OPTICAL NETWORK ELEMENT - 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. | 11-20-2014 |
20140369685 | SYMBOL TIMING ESTIMATION FOR COHERENT POLARIZATION MULTIPLEX OPTICAL RECEIVERS - A received POLMUX signal is rotated by fixed rotation parameters (Rot | 12-18-2014 |
20150280857 | CLOCK RECOVERY METHOD AND CLOCK RECOVERY ARRANGEMENT FOR COHERENT POLARIZATION MULTIPLEX RECEIVERS - Component signal values are derived from component signals and fed to at least one fixed equalizer which generates equalizer output signals. The signals are fed to phase error detectors generating phase error signals. The phase error signals are combined with further phase error signals derived by further error detectors receiving signal values from further equalizers and/or the component signal values directly from sample units. | 10-01-2015 |
Patent application number | Description | Published |
20080205741 | Method and Device for Recognizing a Coin by Using the Embossed Pattern Thereof - The invention relates to a method and device for recognizing a coin by using the embossed pattern characteristics thereof. For this purpose, the inventive method comprises in spreading the characteristics of the picture, in reducing said characteristics by reducing said picture and in transforming it by polar transformation, in comparing the transformed picture with a plurality of reference patterns according to a first simplified criterion, in creating a list of the reference patterns, in sorting them according to the similarity thereof with the transformed picture and in comparing the transformed picture with the reference patterns contained in the list according to the sorting thereof upon a second exact criterion. | 08-28-2008 |
20090092363 | METHOD AND DEVICE FOR GENERATING A STRUCTURE-FREE FIBERSCOPIC PICTURE - An image free from interfering structures may be generated by means of a fiber bundle of several optical fibers, when for the system of fiber bundle and sensor imaging parameters are provided, which describe the geometrical characteristics of the intensity course generated by each individual optical fiber on the sensor. In image reconstruction, for each individual optical fiber an amplitude value and/or luminosity information may be generated by fitting a function of the amplitude value and the imaging parameters of the respective optical fiber to an intensity picture of the sensor, so that an optimum amplitude and/or luminosity value may be generated considering the geometrical imaging characteristics for each individual optical fiber. | 04-09-2009 |
20100119113 | METHOD AND APPARATUS FOR DETECTING OBJECTS - A method for detecting an object on an image representable by picture elements includes: “determining first and second adaptive thresholds for picture elements of the image, depending on an average intensity in a region around the respective picture element”, “determining partial objects of picture elements of a first type that are obtained based on a comparison with the first adaptive threshold”, “determining picture elements of a second type that are obtained based on a comparison with the second adaptive threshold” and “combining a first and a second one of the partial objects to an extended partial object by picture elements of the second type, when a minimum distance exists between the first and the second of the partial objects, wherein the object to be detected can be described by a sum of the partial objects of picture elements of the first type and/or the obtained extended partial objects”. | 05-13-2010 |