Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Telefonaktiebolaget Lm Ericsson (publ)

Friedrich-Alexander-Universitat Erlangen-Nürnberg

U.S. Philips Corporation

Friederich-Alexander-Universität Erlangen-Nurnberg

Friedrich-alexander-universitaet Eriangen-nuemberg

Jörn Thielecke

Udo Wachsmann

Ralf Keller

Gerd Kilian

Jörg Huschke

Niels Hadaschik

Jörg Robert

Markus Hartmann

Andreas Eidloth

Wolfgang Stahl

Hans-Martin Tröger

Ralf Tonjes

Josef Bernhard

Hui Li

Norbert Franke

Tobias Draeger

Hans Adel

Andreas Ernst

Alexander Popugaev

Jamshid Khun-Jush

Thorsten Vaupel

Stephan Haimerl

Hangkan Gunnar Olofsson

Rafael Psiuk

Jochen Seitz

Christian Forster

Marc Fassbinder

Tobias Ruf

Ferdinand Kemeth

Maximilian Singh

Anton Papst

Marc Faßbinder

Wolfgang Granzow

Stefan Aschenbrenner

Felix Lautenschlager

Hakan Olofsson

Gregor Bautz

Alfred MÜLLER

Hans-Martin TRÖGER

Hans-Joachim Mörsdorf

Christian KÜBLBECK

Huber Schmitt

The invention concerns a method and a receiver configured to receive a radio signal carrying information, the radio signal including an overall frequency band having at least three different sub carriers. The receiver is further configured to receive, during a first time period, a first multitone signal carrying a first portion of the radio signal, the first multitone signal including a first and a second sub carrier which are received simultaneously, and to determine a first phase difference between the first and the second sub carrier. The receiver is further configured to receive, during a second time period, a second multitone signal carrying a second portion of the radio signal, the second multitone signal including the second and a third sub carrier which are received simultaneously, and to determine a second phase difference between the second and the third sub carrier. According to the invention, the receiver is configured to determine a phase difference between the first and the third sub carrier using the first phase difference and the second phase difference.

Receiver and method for providing a phase coherency for frequency hopping multitone signals

Embodiments provide a data receiver with a unit for receiving sub-data packets configured to receive at least two sub-data packets from a data transmitter, and to combine the at least two sub-data packets to obtain a data packet that is transmitted split into the at least two sub-data packets by the data transmitter, wherein each of the at least two sub-data packets is shorter than the data packet, a unit for receiving sub-data packets configured to receive the at least two sub-data packets on at least two different carrier frequencies a unit for determining a phase difference configured to determine a phase difference between the at least two sub-data packets that is caused by the at least two different carrier frequencies and the path delay, and a unit for determining a distance difference configured to determine a distance difference between the data receiver and the data transmitter based on the determined phase difference between the at least two sub-data packets.

Localization based on telegram splitting

The invention relates to a method for determining the position of a first sensor node relative to a second sensor node, wherein the first and the second sensor nodes are communicatively connected to each other and are a constituent part of a sensor network, comprising the method steps: reception of signal sections of transmitted signals from at least two transmitters by the first and the second sensor node, beginning at a time tfor a time period t; determining the angle of incidence of the transmitted signals to at least one of the sensor nodes; determining the distance between the sensor nodes from the propagation time differences of the transmitted signals from the at least two transmitters received at the first and second sensor nodes; determining the position of the first sensor node relative to the second sensor node from the distance between the sensor nodes and the angle of incidence of the transmitted signals, wherein the sensor nodes determine the time tand the time period tin relation to a reference frequency which is derived from the received transmitted signal from at least one of the transmitters.

Determining the position of sensor nodes of a sensor network

A method and an apparatus for determining the position and orientation of a mobile transmitter that has at least two linearly polarized antennas arranged at a predefined angle to one another. A plurality of receivers, which can be synchronized with the mobile transmitter and of which the position is known, each receive transmitter signals of predefined carrier frequency via a circularly polarized antenna. A field-theoretical model of the transmission path between the mobile transmitter and receivers is set up and defines the carrier phase measured values, the field-theoretical model is implemented in a Kalman filter, and the receiver signals are evaluated in terms of carrier phase measured values and/or time of arrival values. The position and orientation of the mobile transmitter are determined in the Kalman filter with use of the field-theoretical model and the carrier phase measured values and/or time of arrival values established from the receiver signals.

Method and apparatus for determining the position and orientation of a mobile transmitter

A device and method for determining a distance and/or orientation of a movable object includes a transmitter that is located on the object and a receiver. One of the transmitter and the receiver has an antenna having a known polarization plane. The other of the transmitter and the receiver has a counterclockwise circular polarized antenna and a clockwise circular polarized antenna.

Device and method for determining the distance and/or orientation of a moveable object

Method of arranging a cellular radio network in a geographical area which is already covered by an existing cellular radio network, wherein cell clusters of the cellular radio network to be introduced and using a specific transmission frequency are located in areas determined by connecting at least two cells of the existing cellular radio network using the specific transmission frequency, and wherein the cell clusters are arranged such that they do not overlap with the cells of the existing cellular radio network. The cell clusters of the introduced cellular radio network may be adjusted by reducing the cell size of cell clusters of the introduced cellular radio network, and by introducing new cells into cell clusters of the introduced cellular radio network. The invention allows to reuse frequencies of an existing cellular radio network by an introduced cellular radio network in the same geographical area.

Cellular radio network reusing frequencies

MIMO transmission methods are applied to communicaiton systems in which a transmitter has more than one transmit antenna and a receiver has more than one receive antenna. Information to be transmitted is divided into a plurality of subsignals according to the number of used transmit antennas and each subsignal is processed separately before it is emitted by the respective transmit antenna. In the receiver the different receive signals are processed thus that subsignals are detected and decoded and the contribution of each detected and decoded subsignal is subtracted from the receive signals and whereby a feedback channel from receiver to transmitter is used to send control information to the transmitter depending on the receive situation. In order to optimize the usage of the MIMO channel the invention proposes the in the receiver the link quality of each subsignal is determined and information of each subsignal is transmitted to the receiver via the feedback channel and that in the transmitter properties of the subsignals are controlled by the link quality information.

Link adaptation for MIMO transmission schemes

A communication system that supports multiple modulation and channel coding schemes selects an optimum RF link by measuring link quality parameters, such as C/I ratio. All of the available RF links are characterized based on the measured link quality parameters by calculating mean values and variances of the parameters. Based on the characterization of the RF link, user quality values, such as user data throughput and speech quality values, are estimated. The communication system selects the RF link that provides the best user quality value.

Method for selecting a combination of modulation and channel coding

Multiple access digital transmission system and a radio base station and

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Erlangen, Germany

Jörn Thielecke