Abstract: A method and a device 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.

Abstract: The present invention relates to a method and system for providing a downlink connection in a cellular network. A feedback information indicating a selected cell is transmitted to a central network element (20) controlling at least two network elements (N1-N3) serving cells (C1-C3) of the cellular network. The at least two network elements are controlled by the central network element based on the feedback information so as to establish the downlink connection. Thus, the downlink transmissions of the non-central network elements (N1-N3) are controlled by the network so as to decrease performance loss due to reception errors of the feedback information. The feedback information may be a temporary ID obtained in a site selection diversity transmission control scheme.

Abstract: A multi-user receiver which uses at least two antenna elements and in which the influence of interference is reduced, the receiver comprises: means (200) for pre-filtering a wideband antenna signal, the pre-filtering means being determined on the basis of a spatial covariance matrix estimate, which spatial covariance matrix estimate is obtained from wideband antenna signals by sampling, arranging sampled values into a signal vector and by multiplying the signal vector by its conjugate transpose vector, means (210, 218) for removing the whitening from signals of predetermined users by using an inverse matrix of the matrix used in the whitening filter, means (202, 204, 206, 208, 210) for performing multi-path combining and multi-antenna combining.

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: This invention teaches a method for use in a wideband CDMA telecommunications system wherein the base station (BS) utilizes transmit antenna diversity. The method enables the user equipment (UE) to perform a channel estimate for channels received from two antennas of the base station (BS), and includes steps of: (a) computing an estimated phase difference between a common pilot channel and a dedicated pilot channel received from one antenna of the two antennas; and (b) determining the channel estimate by rotating a common pilot channel estimate according to the estimated phase difference, where the phase difference is computed as a complex coefficient between the common pilot channel and the dedicated pilot channel. In a second aspect this invention teaches a method for use in a transmit antenna diversity system for enabling the UE to verify an antenna phase shift previously signaled by the UE to the BS.

Abstract: An arrangement for controlling transfer of information, comprising a radio system and a terminal equipment, which radio system comprises at least two base stations and is configured to set up simultaneous connections between the terminal equipment and at least two base stations, the terminal equipment being configured to measure properties of the connections between the terminal equipment and the base stations, and to select at least one of the base stations as a primary base station, information transfer between the primary base station and the terminal equipment being activated, and the radio system comprising a combining-splitting point, which is configured to carry out combining/splitting functions on information flows transmitted via connections set up over different physical transmission paths.

Abstract: There is proposed a technique for determining parameters, especially channel estimation, in the receiver of a communication system utilising adaptive antenna techniques. The technique uses information transmitted in the antenna signals and in the beam signals to determine the parameters.

Abstract: There is proposed a technique for determining an estimate of interference power, in the receiver of a communication system utilising adaptive antenna techniques. The technique uses information transmitted in the antenna signals and in the beam signals to determine the estimate of the interference power.

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: 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: The present invention relates to a method and circuitry for determining a spreading factor in a communication system with variable data rates. In such a system the received signal may include a plurality of data symbols that are spread in the transmission signal in a manner that is defined by a spreading code and a spreading factor, the spreading factor being one of a plurality of possible spreading factors. In accordance with the method, the received signal is processed so as to produce signal outputs which are cleared from the effects of the spreading code, autocorrelation values are computed for the signal outputs, and the spreading factor is determined based on the computed autocorrelation values.

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 arrangement for cancelling interference from a received signal, comprising: a first radio system and a second radio system employing a time slot structure in data transmission and operating on at least partly the same geographical area as the first radio system. A receiver of the first radio system is configured to control the cancellation of interference from the received signal on the basis of the timing employed in the time slot structure of the second radio system.

Abstract: The invention relates to a channel estimation method and a receiver for forming a channel estimate. The arrangement according to the invention comprises forming a preliminary channel estimate ck by multiplying a received sample zk by a known pilot symbol in a multiplier; forming a preliminary autocorrelation of preliminary channel estimates that are successive in time in multipliers; filtering preliminary autocorrelations by averaging in a filter, and forming filter parameters &agr;k to &agr;k−m in a filter on the basis of the averaged autocorrelation, and forming an average channel estimate by a filter section which forms a channel estimate and which is controlled by filter parameters &agr;k to &agr;k−m.

Abstract: The invention relates to a method for controlling transmission power in a communications system, comprising the steps of receiving a signal in a receiver instructing a transmitter to increase or decrease the transmission power by a power control step. The method further comprises the steps of determining statistics of a power distribution of a received signal and controlling the size of said power control step adaptively on the basis of said statistics.

Abstract: The present invention relates to a method and circuitry for determining a spreading factor in a communication system with variable data rates. In such a system the received signal may include a plurality of data symbols that are spread in the transmission signal in a manner that is defined by a spreading code and a spreading factor, the spreading factor being one of a plurality of possible spreading factors. In accordance with the method, the received signal is processed so as to produce signal outputs which are cleared from the effects of the spreading code, autocorrelation values are computed for the signal outputs, and the spreading factor is determined based on the computed autocorrelation values.

Abstract: The invention relates to a channel estimation method and a receiver for forming a channel estimate. The arrangement according to the invention comprises forming a preliminary channel estimate ck by multiplying a received sample zk by a known pilot symbol in a multiplier; forming a preliminary autocorrelation of preliminary channel estimates that are successive in time in multipliers; filtering preliminary autocorrelations by averaging in a filter, and forming filter parameters &agr;k to &agr;k−m in a filter on the basis of the averaged autocorrelation, and forming an average channel estimate by a filter section which forms a channel estimate and which is controlled by filter parameters &agr;k to &agr;k−m.