Abstract: A cyclic shift of a reference signal is quantized as a combination of a cell specific cyclic shift with an outcome of a pseudo-random hopping, and an indication of the cell specific cyclic shift is broadcast in the cell. In one embodiment the cyclic shift is quantized as a modulo operation on a sum of the cell specific cyclic shift, the outcome of the pseudo-random hopping, and a user specific cyclic shift, in which case an indication of the user specific cyclic shift is sent in an uplink resource allocation and a user sends its cyclically shifted reference signal in the uplink resource allocated by the uplink resource allocation. The cyclic shift may also be quantized according to length of the reference signal as cyclic_shift_symbol=(cyclic_shift_value*length of the reference signal)/12; where cyclic_shift_value is between zero and eleven and cyclic_shift_symbol is the amount of cyclic shift given in reference signal symbols.

Abstract: A receiver in a radio system, comprising one or more antennas (600A to 600B) for receiving a signal including signal components descriptive of a signal to be detected and an interfering signal. The receiver comprises means for measuring (614A to 614B) the antenna-specific reception power of the received signal and means for weighting (614A to 614B) the signal received in each antenna by a antenna-specific weighting coefficient proportional to the reception power of said signal.

Abstract: An approach is provided for performing control signaling. Data and control information are received. The control information is orthogonalized using block-level spreading. The data and the orthogonalized control information are multiplexed at a symbol-level.

Abstract: In one exemplary embodiment of the invention, a method including: determining whether first allocation information has been transmitted from a first device towards a second device in a wireless communication system; and transmitting a message including transmittal information and second allocation information from the first device towards the second device, wherein the transmittal information corresponds to the determined transmittal of the first allocation information. In another exemplary embodiment of the invention, a method including: detecting whether a first signal is received on a dedicated resource of a wireless communication system; detecting whether a second signal is received on a shared resource of the wireless communication system; and determining, based on a detection outcome for the first signal and a detection outcome for the second signal, whether at least one allocation has failed.

Abstract: A detect decision is made by non-coherently combining results from correlating a preamble (CAZAC) sequence with base/root sequences used in the cell and setting a detection threshold based on those combined results. Another threshold can be set based on coherently combining results from correlating the preamble sequence, in which case the detect decision is based on satisfying either one of the thresholds. Where the sequence repeats in the same preamble, the results that are combined are from correlating the first instance of the CAZAC sequence and from correlating the second instance of the CAZAC sequence. Where the sequence does not repeat, different segments of the CAZAC sequence, each less than the whole and not necessarily of the same length, are correlated for a partial correlation on each segment, then the segments are combined and used to set the detection threshold.

Abstract: There is provided a data sequence structure for an uplink control information single carrier signal, comprising: a first code word and a second code word each corresponding to at least one type of uplink control information; a plurality of data units included in the first and the second code-words; a similar sequence of pilot units included in both the first and the second code word. The first and the second code word having a maximum Euclidean distance between the data units, and both the first and the second code word having the form of a CAZAC sequence.

Abstract: There is provided a radio system, having a receiver for receiving cell measurement data with respect to an own cell and adjacent cells of each user terminal of a plurality of cells of the radio system; a calculation unit for comparing resulting interference values of different user terminal combinations within the same frequency-time resource group of the radio system on the basis of the cell measurement data, the frequency-time resource group including user terminals of more than one cell; and a processing unit for controlling resource allocation in at least part of the frequency-time resource groups on the basis of the comparison.

Abstract: A method for controlling a filter, a transmitter, a receiver and an apparatus are provided. The apparatus comprises a filter configured to filter signal blocks to be transmitted in a cyclic transmission form and a controller configured to select a roll-off factor of the filter for a signal block depending on whether transmission is performed in a synchronous or an asynchronous mode.

Abstract: It is provided a solution for selecting the length of a transmission time interval for high-speed packet radio communications between a base station and a mobile station. The length of the transmission time interval used in data transfer is selected on the basis of channel conditions between the mobile station and the base station. An average value for a channel quality metric representing the channel conditions is calculated and the calculated average value of the channel quality metric is associated with a pre-determined length of the transmission time interval. That length of the transmission time interval is then selected for the data transfer between the mobile station and the base station.

Abstract: A network element may provide a plurality of user equipments with a dedicated pilot sequence for uplink reference signal transmission. A user equipment may, after receipt of a dedicated pilot sequence, spread the pilot sequences using a block spreading method.

Abstract: A communication method and a communication arrangement in a Code Division Multiple Access radio system is provided According to one embodiment, at least two transceivers of the radio system communicate with a packet switched connection through a radio interface. The quality of the packet switched connection is measured and a target Signal Interference Ratio is adjusted based on the quality measurement. When a transceiver receiving packets transmits a request to retransmit in the case of failure in reception of at least one packet, a transceiver transmitting packets is configured to retransmit each packet requested as a response to the request. The target Signal Interference Ratio for retransmission of a packet is set lower than the target Signal Interference Ratio for the first transmission of the corresponding packet.

Abstract: The invention relates to a receiver in a radio system, comprising two or more receiving antennas (300A-300B) for receiving a spread spectrum signal containing user signals, means for locating (200A-200B) delay components of the user signal at different measurement moments, means for forming (304) a combined correlation value from at least two correlation values of a certain delay component, the two correlation values being formed from signals received via different receiving antennas (300A-300B), and the estimation means (310) being configured to use the combined correlation value to correct channel distortion. The invention also relates to a method of receiving a signal.

Abstract: A method is provided for block spreading individual control symbol sequences, mapping the block spread control symbol sequences, adding a cyclic prefix to the block spread control symbol sequences to form a data-non-associated control signaling information, and transmitting the data-non-associated control signaling information.

Abstract: A cyclically shifted sequence is provided. Information is modulated using a selected modulation coding scheme, multiplied with the cyclically shifted sequence, and mapped into at least one subcarrier and transmitting on an uplink.

Abstract: The present invention relates to a method and apparatus for performing an interference estimation in a spread spectrum system using a plurality of spreading codes with different code lengths, wherein the interference estimate is obtained based on a variance estimate of despread samples integrated over a predetermined code period over which said plurality of spreading codes are orthogonal. Thereby, an unbiased interference estimation with high accuracy and proper consideration of code orthogonality can be obtained.

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: The invention relates to a receiver in a spread spectrum system, comprising reception means for receiving a spread spectrum signal. The receiver comprises interference cancellation means configured to cancel multiuser interference and external interference from the received spread spectrum signal in one or more interference cancellation stages. The invention further relates to an interference cancellation method in a spread spectrum system.

Abstract: An interference cancellation unit having as an input two or more IFDMA signals comprising a multitude of frequency bins is provided. The unit comprises a channel estimator for determining a channel estimate from the input signals, a matrix calculator for determining an error covariance matrix of the input signals, and an estimator for determining weight factors on the basis of the channel estimate and the error covariance matrix and weighting and combining the input signals. The unit further comprises a preprocessor for removing unwanted frequency bins from the input signals prior to the error covariance calculation.

Abstract: A data transmission method and a base station in a telecommunication system are provided. The base station comprises a first transmitter for transmitting a downlink packet transmission, a first receiver for receiving uplink packet transmission, a first controller for checking whether a packet is received successfully, thus obtaining a correct packet, a second receiver for receiving, from at least one other base station, a packet the at least one other base station has successfully received from the uplink direction, a second controller for combining a packet unsuccessfully received from the uplink direction with the at least one packet received from the at least one other base station, and a second transmitter, for sending a correct packet further to other parts of the telecommunication system.

Abstract: A method and apparatus for power-based radio resource management in wireless radio systems based on continuously measuring a total interference power/tot and own-cell interference power/own as well as a continuously estimating the system noise power PN and/or the other-to-own cell interference ratio i based on these measurements. As a result, improved values PN and i are provided and a more accurate load factor/noise rise calculation can be performed.