Ntt Docomo, Inc.

Intel Deutschland Gmbh

Huawei Technologies Co., Limited

Intel Mobile Communications Gmbh

Gerhard Bauch

Wen Xu

Guangxia Zhou

Armin Wittneben

Katsutoshi Kusume

Josef A Nossek

Marc Kuhn

Ralf Koetter

Joachim Hagenauer

Jian Zhao

Fabian Nikolaus Hauske

Christian Hartmann

Christian Bettstetter

Joerg Widmer

Georg Zeitler

Robert Vilzmann

Doris Pflueger

Frank Schreckenbach

Described herein are implementations related to communication in a wireless communication system. In one implementation, serving signals from serving base stations and interfering signals from neighbor base stations are split into multiple substreams. A power allocation algorithm is used to calculate the power amplitude factor of the substreams communicated from the serving based stations coupled to corresponding wireless devices. A control signaling related to this implementation is described.

Wireless communication interference mitigation

A communication device is described comprising a receiver configured to receive a receive symbol vector resulting from a transmission of a transmit symbol vector from at least one transmitter to the receiver wherein the transmit symbol vector comprises a plurality of transmit symbols wherein each transmit symbol is associated with a modulation type and a detector configured to determine a detection order for the plurality of transmit symbols based on the modulation types and to determine, for at least one bit of at least one transmit symbol, at least one soft value based on the receive symbol vector according to the detection order.

Communication devices and methods for signal detection

The present disclosure relates to a method for detecting a parity error in a sequence of DQPSK symbols of a digital transmission system, comprising determining a first demodulated symbol r; determining a second demodulated symbol r; determining a first parity symbol p; determining a second parity symbol p; determining a super-parity symbol q; and detecting a parity error in the sequence of DQPSK symbols by comparing a combination of the first parity symbol pand the second parity symbol pagainst the super-parity symbol q, wherein a parity between two DQPSK symbols describes a phase difference between the two DQPSK symbols.

Method and apparatus for detecting a parity error in a sequence of DQPSK symbols of a digital transmission system

A relay station for being operative in a mobile communication system, comprising a receiver for receiving a radio signal from a source, the radio signal comprising symbols representing an encoded information, the encoded information being based on an encoding rule and comprising payload information and redundancy information. The relay station comprising a soft detector for detecting a symbol from the radio signal to obtain soft information, the soft information comprising information on the symbol and reliability information on the information on the symbol. The relay station further comprising a quantizer for quantizing the soft information to obtain quantized soft information and a transmitter for transmitting an information on the quantized soft information to a destination.

Relay station for a mobile communication system

An apparatus for estimating a wireless radio channel between a first terminal and a relay station, the apparatus including a receiver for receiving a signal including a superposition of previously transmitted first information from the first terminal and second information from a second terminal, the second terminal also communicating with the relay station, a storage for storing the previously transmitted first information, and a channel calculator for calculating the wireless radio channel using the received signal and the stored first information as pilot information for the received signal.

Method, apparatus and system for channel estimation in two-way relaying networks

An apparatus for providing a combined digital signal comprises a bit adder and a combiner. The combined digital signal contains information of a first digital input signal and a second digital input signal, wherein a block length of the first digital input signal is shorter than a block length of the second digital input signal. The bit adder is configured to add at least one filling bit to a block of the first digital input signal to obtain an adapted first digital input signal, so that the block length of the adapted first digital input signal is equal to a block length of the second digital input signal. The combiner is configured to combine the adapted first digital input signal and the second digital input signal to obtain and provide the combined digital signal.

Apparatus for providing a combined digital signal

A receiver includes a receiving unit for scanning a dedicated signaling channel for the presence of an announcement signal. The announcement signal indicates a transmitter willing to access a transmission medium. The receiving unit is further operative to receive a data signal from a further transmitter on a dedicated traffic channel. Furthermore, the receiver includes an interference estimator for estimating, whether an interference caused by a new transmitter is allowable or not. A processor is provided for applying an interference counter-measure, when the interference is not allowable. A transmitter can, without any limitation, transmit the announcement signal. The transmitter will start transmitting, when it receives a ready-to-receive signal from the addressed receiver and when it does not receive an objection tone from another receiver in the network.

Receiver and transmitter for a network having a non-centralized medium access control

The present invention achieves differential transmit diversity and related diversity reception schemes transmit symbol constellations which are extended to multiple levels. Heretofore, a group of transmission bits is divided into a first sub-group of transmission bits and a second sub-group of transmission bits. Then, the first sub-group of transmission bits is mapped () onto constellation points of a differential transmit diversity coding scheme from an orthogonal design for coding of the first sub-group of transmission bits. Then, after differential encoding of the constellation points () a length of the transmission symbol vector is scaled () for coding the second sub-group of transmission bits. Therefore, the present invention overcomes restrictions implied through unit length requirements for previously known differential transmit diversity schemes from orthogonal designs.

Differential multiple-length transmit and reception diversity

To provide transmission and reception diversity schemes for a powerful, flexible and less complex bandwidth-efficient space-time modulation scheme there is proposed a method of and apparatus for differential multiple-norm space-time transmit diversity from a unitary space-time modulation scheme using at least two transmit antennas. In a first step a group of transmission bits is divided into a first sub-group of transmission bits and a second sub-group of transmission bits. In a second step the first sub-group of transmission bits is mapped onto a constellation matrix of a differential unitary space-time modulation scheme. In a third step a scaling factor is determined from the second sub-group of transmission bits. In a fourth step a transmission matrix is sep up through differential encoding of the constellation matrix and a previously determined transmission matrix in combination with scaling by the scaling factor. The differential multiple-norm transmit diversity according to the present invention improves distance properties of the modulation scheme which are relevant for achievable error rates and extends higher order modulation also to the area of differential transmit diversity schemes from unitary designs.

Growing community of inventors

Munich, Germany

Gerhard Bauch