Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Andreas Kortke

Wilhelm Keusgen

Michael Peter

Hung-Anh Nguyen

Wilhelm Kreusgen

A method for spreading a plurality of data symbols onto subcarriers of a carrier signal for a transmission in a transmission system provides a data vector, including the plurality of data symbols. The provided data vector is transformed, and based on the transformed data vector and a spreading matrix subsequent to the transform, a spread data vector is being created, having a length which corresponds to the number of the subcarriers.

Method for spreading a plurality of data symbols onto subcarriers of a carrier signal

A method for spreading a plurality of data symbols onto subcarriers of a carrier signal for a transmission in a transmission system provides a data vector, including the plurality of data symbols; and generates a spread data vector based on the provided data vector and a spreading matrix, with the spread data vector including a length, which corresponds to the number of subcarriers and with the spreading matrix being based on a spreading allocation matrix, a base spreading matrix, and a randomization matrix.

A method for determining a beamforming vector or a beamforming channel matrix in a communication system including a transmitting station and a receiving station, and a communication system. The transmitting and receiving stations include respective antenna groups and respective codebooks include a plurality of predefined beamforming vectors for the antenna group.

Method for determining beamforming parameters in a wireless communication system and to a wireless communication system

Embodiments of the present invention provide an apparatus for amplifying an input-signal. The apparatus includes a switch-mode amplifier for amplifying a digital input-signal. The apparatus is characterized by a generator for generating the digital input-signal based on the input-signal, wherein the generator is configured to generate the digital input-signal such that the digital input-signal is located at a predefined frequency band and such that distortions are located at a frequency higher than the predefined frequency band.

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Berlin, Germany

Andreas Kortke