Abstract: A transmitter and an applicable method include an antenna system for achieving two transmit paths, a first modulator for modulating a signal to be transmitted into complex modulation symbols, and a second modulator for constructing layered channel symbols as linear combinations of the complex modulation symbols. The second modulator constructs channel symbols by using first and second non-zero coefficients when performing the linear combination. The ratio of the first and second coefficients is not a real number. The channel symbols are transmitted by using a first non-zero total power for transmission on a first transmit path, and a second non-zero total power for transmission on a second transmit path, wherein the first and second total powers are not equal.

Abstract: The invention relates to a method and an arrangement for transmitting a digital signal consisting of symbols, which arrangement comprises a coder (308) for coding complex symbols to channel symbols in blocks having the length of a given K, means (312) for transmitting the channel symbols via several different channels and two or more antennas (314 to 318). The coder (308) is arranged to code the symbols using a code matrix, which can be expressed as a sum of 2K elements, in which each element is a product of a symbol or symbol complex conjugate to be transmitted and a N×N representation matrix of a complexified anti-commutator algebra, extended by a unit element, and in which each matrix is used at most once in the formation of the code matrix. A code matrix is also provided which is formed by matrices of a portion of the symbols placed on the diagonal of the code matrix and by matrices of a second portion of symbols along the anti-diagonal of the code matrix.

Abstract: A transmission method and a transmitter include one or more antennas for achieving several transmit antenna patterns for the transmission of a signal, and a receiver for receiving complex channel symbols at its input. To achieve a high transmission rate and good resistance to interference, the transmitter is configured to code the complex channel symbols by using orthogonally distributed channel resources into channel symbols such that a channel symbol to be transmitted using at least one antenna pattern during at least one channel resource unit is a linear combination of at least three modulation symbols. The invention also includes a transmitter for transmitting more than T complex modulation symbols during T channel resource units, wherein T is at least 2.

Abstract: Apparatus, methods and computer program products operate an electronic device to generate downlink allocation information and uplink allocation to be signaled to other electronic devices operative in a wireless communications system; and to operate radio apparatus to signal the downlink allocation information and uplink allocation information in a control channel, wherein the downlink allocation information is signaled in a downlink allocation portion of the control channel and the uplink allocation information is signaled in an uplink allocation portion of the control channel.

Abstract: Equipment for transmitting a signal, the equipment comprising an antenna array (600-606) for providing three or more radiation antenna patterns. The equipment is arranged to transmit a primary common pilot signal with at most two radiation patterns and a secondary common pilot signal with at least one radiation pattern. The equipment comprises controllers (622a-622d) for adjusting the power ratio between the primary and the secondary common pilot signal and the total power of the primary and the secondary common pilot signals, and controllers (614a-614d) for adjusting the transmit power of the dedicated pilot signal, such that the power levels of the dedicated pilot signals transmitted with the same radiation patterns as the secondary common pilot signal are relatively higher than the power levels of the dedicated pilot signals transmitted with the same radiation patterns as the primary common pilots.

Abstract: An interference rejection algorithm for a radio receiver is presented. According to the present solution a signal comprising a training sequence and a data sequence is received at the radio receiver. A radio channel response may be estimated from the received training sequence, and interference parameters may be estimated from at least one of the received training sequence and the received data sequence, the estimation of the interference parameters comprising smoothing a frequency spectrum of at least one of the estimated channel response and the estimated interference parameters through averaging. Then, frequency domain interference suppression weights are calculated from the estimated channel response and the interference parameters, and weighting of the received data sequence is carried out with the calculated weights.

Abstract: Apparatus, computer program products and methods operate an electronic device to determine an operating mode of a controlled electronic device operating in the wireless communications network; to generate a control signal in dependence on the operating mode of the controlled electronic device; to configure the control signal in a pre-determined manner in dependence on the operating mode of the controlled electronic device, wherein the pre-determined manner is known to both the electronic device and to the controlled electronic device; and to operate the radio apparatus to transmit the control signal to the controlled electronic device.

Abstract: A method, device, and system in which radio links between relays and users are optimized separately from the links between relays and base stations and in which multiple simultaneous data streams between relays and base stations are created. The system includes transceivers of at least three kinds with two kinds of radio interfaces. The first kind of transceiver, a base station (BS), is connected to the core network with a link of wire line quality. The second kind, a relay station (RS), is connected to the BS with a first radio interface, and to the third kind, the user equipment (UE), with a second radio interface. The first and second radio interfaces can operate, at least in part, using the same frequency bandwidth. The UE can also connect directly to the BS using the second radio interface if the BS is closer than any RS.

Abstract: Various example embodiments are disclosed including methods, a system, a transmitter apparatus, a receiver apparatus, and computer program products which may provide advanced feedback signaling in a multi-antenna transmission system. In an example embodiment, a codebook may include an indexed set of beamforming elements, and may further include a first subset of elements for phase-only antenna control, and at least one of a second subset of elements for antenna subset selection, and a third subset of elements for single antenna selection.

Abstract: A method is discussed for generating feedback information for controlling transmission from a transmitting end using a set of feedback symbols. The feedback information comprises a set of feedback words. At least one feedback symbol is determined based on at least one signal received from the transmitting end. A feedback word to be transmitted to the transmitting end is determined, the feedback word relating to the determined feedback symbol, by a mapping between said set of feedback symbols and said set of feedback words. This mapping takes into account the effect of at least one possible transmission error in transmitting the feedback word to the transmitting end. Furthermore, the mapping is different from a mapping relating to Gray encoding.

Abstract: The invention relates to a method and an arrangement for transmitting a digital signal consisting of symbols, which arrangement comprises a coder (308) for coding complex symbols to channel symbols in blocks having the length of a given K, means (312) for transmitting the channel symbols via several different channels and two or more antennas (314 to 318). The coder (308) is arranged to code the symbols using a code matrix, which can be expressed as a sum of 2K elements, in which each element is a product of a symbol or symbol complex conjugate to be transmitted and a N×N representation matrix of a complexified anti-commutator algebra, extended by a unit element, and in which each matrix is used at most once in the formation of the code matrix. A code matrix is also provided which is formed by matrices of a portion of the symbols placed on the diagonal of the code matrix and by matrices of a second portion of symbols along the anti-diagonal of the code matrix.

Abstract: The present invention relates to enhanced feedback in a multi-antenna transmission system, wherein an operation mode of a multi-antenna transmission end may be determined at a reception end of a connection, and a feedback information and a mode indicator may be generated based on the determined operation mode and transmitted to the multi-antenna transmission end where the feedback information may be interpreted based on the mode indicator.

Abstract: A pilot transmission in a multiple antenna closed loop transmission time multiplexes a beam-specific pilot and an antenna-specific pilot in two short blocks of one uplink sub-frame. The beam-specific pilot is transmitted as an in-band pilot with the same beam as data to provide optimal data demodulation/estimation. The antenna-specific pilot is transmitted as an out-band pilot to provide optimal beam selection.

Abstract: A method of adapting transmission parameters in a multicarrier communication system having multiple transmit antennas and/or multiple receive antennas, whereby a statistical parameter of a wideband channel is computed, one type of matrix modulation scheme is selected to be used for a given multicarrier modulation symbol, one type of signal constellation is selected to be used for a given multicarrier modulation symbol, and one concatenated channel coding rate is selected to be used for a given multicarrier modulation symbol. Multicarrier modulation symbols are then transmitted using the selected matrix modulation scheme, signal constellation, and concatenated channel coding rate.

Abstract: The invention is related to a data processing method comprising: selecting from at least one codebook a codebook and at least one weight in the codebook fulfilling a predetermined performance criterion, wherein one of the at least one codebook is of the form: [ ? 1 0 0.5 0.5 0.5 0 1 0.5 ? ? j ? ? 0 0.5 ? ? j ? ? 3 0.5 ? ? j ? 2 ? ? 3 ? ? ? ? 0.5 0.5 0.5 0.5 ? ? j ? ? ? 0.5 ? ? j ? 4 ? ? 3 0.5 ? ? j ? 5 ? ? 3 ] ; and informing the selected at least one codebook and weight to a transmitter for being used in transmission.

Abstract: A device configured to perform communication operations, the device having a transceiver and a control unit. The transceiver is configured to receive a signal incorporating scheduling grant and antenna weight feedback information from a remote receiver in a wireless communications system. The control unit is configured to verify correct receipt of the signal incorporating the scheduling grant and antenna weight feedback information and to use the antenna weight feedback information to control beamforming operations performed by the device when performing signal transmission operations. A computer program product composed of a computer readable memory medium storing a computer program.

Abstract: The present invention relates to a method and a communication system wherein stations communicate on a wireless interface. The method includes the steps of including beam identity information into signals transmitted on multiple beams provided by a first station, receiving at a second station signals transmitted from the first station, and identifying beams via which the second station received signals from the first station based on said identity information. At least one beam for transmission on the wireless interface between the stations is then selected. A station configured for the communication comprises antenna means for receiving signals transmitted from the other station on multiple beams and a controller for identifying beams based on beam identity information associated with signals received from the other station.

Abstract: Resources are allocated on a shared downlink control channel by an allocation table that is partitioned into a first, fixed length partition and into at least one second, variable length partition. The fixed length and the modulation and coding scheme MCS of the first partition is known a priori. The second variable length and the MCS of the second partition may be given in the first partition. Robustness may be varied between different second partitions of the same allocation table, or even within a single second partition to account for users at different proximity to the network node giving the allocations. Users may be identified in the first partition (e.g., a fixed number of users), and/or in the second partition (either additional allocated users or all users being allocated if the first partition does not identify users). Method, apparatus, computer program, integrated circuit and systems are detailed.

Abstract: The invention relates to a method for indicating the allocation of a set of transmission resources between user stations in a communication system comprising at least a control entity, a transceiver entity and at least one user stations. In the method in the control entity is determined the number of sharing user stations that share the set of transmission resources. In the control entity is determined a combination of transmission resource allocation sizes corresponding to the requirements of each the sharing user station. To the user stations is transmitted from the transceiver entity an allocation table wherein the sharing user stations are identified in an order corresponding to the transmission resource allocation sizes for each the sharing user station. To the user stations is transmitted from the transceiver entity a field identifying the combination of transmission resource allocation sizes.

Abstract: A method for equalizing a frequency-selective transmission channel (103) with N inputs and MR outputs is shown, the transmission channel representable in a transformation domain based on N orthogonal sub-carriers, and wherein the transmission characteristics from the MT inputs to the MR outputs for each of the N respective orthogonal sub-carriers are represented by N respective sub-carrier channels (201), the method using (904) equalization filters (301, 302) for at least two of the N sub-carrier channels, wherein at least one set (501) of sub-carrier channels comprising at least two of the N sub-carrier channels is formed (901), wherein for at least one sub-carrier channel, a first-type equalization filter is used that is determined (902) based on a representation of at least one sub-carrier channel, and wherein for at least one sub-carrier channel, a second-type equalization filter is used that is derived (903) at least partially from the first-type equalization filter.