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

Friedrich-alexander-universitaet Erlangen-nuernberg

Friedrich-alexander-universitat Erlangen-nürnberg

Eberhard Gamm

Josef Bernhard

Gerd Kilian

Jakob Kneissl

Heinz Gerhaeuser

Johannes Wechsler

Jörg Robert

Raimund Meyer

Frank Obernosterer

Gerald Ulbricht

Reiner Retkowski

Michael Schlicht

Jakob Kneißl

Joerg Robert

Robert Koch

Markus Siebenhaar

Karol Bieg

Clemens Korn

Martin Kohlmann

Jacob Kineissl

A data receiver is configured to receive a signal, the signal comprising interferences of an interference-infested transmission channel, the data receiver being configured to form a histogram of receive information of a signal portion of the received signal and to determine mean receive information and/or a noise measure from the histogram.

Interference detection and suppression in non-coordinated systems

A data receiver is configured to receive a signal including a plurality of partial data packets, wherein the plurality of partial data packets each include part of a data packet, wherein the data receiver includes a multi-stage correlator that is configured to perform multi-stage correlation to detect the partial data packets in the received signal, wherein a second correlation stage of the multi-stage correlator operates based on correlation results of a first correlation stage of the multi-stage correlator.

Packet correlator for a radio transmission system

Embodiments provide a data receiver, wherein the data receiver is configured to receive a broadband signal, wherein the broadband signal includes at least two partial data packets that are distributed in time and/or frequency, wherein the data receiver is configured to perform detection of the at least two partial data packets in the broadband signal and to provide at least one detection parameter for the detected partial data packets, wherein the data receiver is configured to perform decoding of the detected partial data packet by using the at least one detection parameter, wherein the data receiver is configured to perform or process detection and decoding separately from one another.

Packet detector/decoder for a radio transmission system

A data receiver configured to receive a signal having at least two partial data packets, the data receiver being configured to estimate a state of a transmission channel, to obtain first channel state information, to demodulate a first set of received symbols from different data packets, to obtain a first set of received encoded bits, wherein the data receiver is configured to decode the first set of received encoded bits to determine, a first set of estimated encoded bits which corresponds more likely to a first set of transmitted encoded bits than the received encoded bits, and to map the first set of estimated bits to estimated transmission symbols using a mapping rule matching a transmitter-side mapping rule to obtain a first set of estimated transmission symbols, and to determine second channel state information using the first set of estimated transmission symbols.

Decoder-supported iterative channel estimation

An I/Q modulator used for processing an I/Q signal to obtain a predistorted output signal. The I/Q signal has an I component and a Q component, and comprises a predistorter for predistorting, with a predistortion signal, a carrier signal, which comprises a first subcomponent and a second subcomponent that is substantially orthogonal to the first subcomponent, to obtain first and second predistorted subcomponents of the carrier signal. The predistortion signal depends on the I and Q components. A first multiplier multiples the I component by the first predistorted subcomponent to obtain a multiplied I component. A second multiplier multiples the Q component by the second predistorted subcomponent to obtain a multiplied Q component. An adder adds the multiplied I component and the negative multiplied Q component to obtain the predistorted output signal. Thus, a simplification of the I/Q modulator and a reduction in the number of necessary multipliers is achieved.

I/Q modulator with carrier predistortion

An I/Q modulator processes a time-discrete I/Q signal comprising an I component and a Q component. The I/Q signal is based on a sampling frequency which is equal to four times a carrier frequency of a carrier signal onto which the I/Q signal is modulated. A predistorter of the modulator predistort the I and components with a predistortion signal, which depends on the I and Q components, so as to form a predistorted I component and, in temporal alternation therewith, a predistorted Q components. An adjuster of the modulator adjusts the signs of the predistorted I and Q components so that two temporally successive predistorted components have a first sign and two additional successive predistorted components, which follow the first-mentioned components in time, have a second sign which is the inverse of the first sign, so as to produce therefrom an output signal at an output of the modulator.

Digital I/Q modulator having a predistortion

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Ebermannstadt, Germany

Eberhard Gamm