Abstract: It is described an antenna arrangement for transmitting and/or for receiving electromagnetic radiation. The antenna arrangement includes two antenna elements, which are adapted for transmitting and/or for receiving electromagnetic radiation of a first polarization. The antenna arrangement further includes one antenna element, which is adapted for transmitting and/or for receiving electromagnetic radiation of a second polarization being different from the first polarization. Furthermore, there is provided one coupling unit, which is adapted to couple, based on an appropriate control signal, the antenna elements selectively with one terminal of the antenna arrangement in such a manner, that the polarization direction of the antenna arrangement can be adjusted to the first polarization or to a combination of the first and the second polarization.

Abstract: For a radio transmission between a subscriber station and a base station in accordance with a hybrid multiple access method (e.g. CDMA, FDMA, TDMA), unambiguous descriptions for the usable transmission resources in the uplink and downlink are proposed to obtain efficient utilization of resources in the access of symmetric and/or unsymmetric services, the channel description containing information on the order of channel utilization during the radio transmission.

Abstract: OFDM symbols are generated using data from one or more users or from one or more data sources represented on a number of sub-carriers. To inhibit multiple-access interference on application of the CDMA principle, the data are transformed in a data-source specific manner and only subsequently allocated to the sub-carriers, independently of the transformation.

Abstract: The present invention is related to a method for data transmission via an interface between a communication pair of a transmitting subscriber and a receiving subscriber of a communication system, wherein a scrambled pilot signal is used both for channel measurement and for data transmission. The present invention relates further to a subscriber for data transmission and a communication system.

Abstract: A method and a device are provided for operating at least a first radio access technology and a second radio access technology, the method including the step of: a hybrid radio frame is provided including elements of the first radio access technology and of the second radio access technology.

Abstract: Resources of two frequency division duplex (FDD) frequency bands at a distance from each other are allocated for transmissions by a time division duplex (TDD) transmission method. The resources in the first FDD frequency band are allocated for FDD transmissions in the uplink and for TDD transmissions predominantly in the uplink as the primary transmission direction, and in a secondary manner in the downlink as the secondary transmission direction. The resources in the second FDD frequency band are allocated for FDD transmissions in the downlink and for TDD transmissions predominantly in the downlink as the primary transmission direction and in a secondary manner in the uplink as the secondary transmission direction. No resources are allocated for time periods of an allocation of resources for one of the secondary transmission directions in the first and second frequency bands, for FDD transmissions in the counter transmission direction to this secondary transmission direction.

Abstract: Data in a mobile communications system is transmitted on at least one channel between at least one base station with multiple antennas and at least one user equipment. A base station applies precoding to the data based on a set of predefined codebooks. A first tracking mode with a first codebook from the set of predefined codebooks is used for the precoding, and at least a second tracking mode with at least a second codebook from the set of predefined codebooks is used for the precoding. The base station switches between the first tracking mode and the second tracking mode depending on at least one condition of the channel.

Abstract: OFDM symbols are generated using data from one or more users or from one or more data sources represented on a number of sub-carriers. To inhibit multiple-access interference on application of the CDMA principle, the data are transformed in a data-source specific manner and only subsequently allocated to the sub-carriers, independently of the transformation.

Abstract: A method of selecting suitable frequency bands for data transmission between a network node and a user equipment within a mobile communications network. A method selects suitable frequency bands for data transmission between a network node and user equipment within a mobile communications network. A scheduler on the network node side selects data transmission mode depending on the user equipment capability of receiving data from at least two frequency bands simultaneously. The scheduler preferably selects the data transmission mode in the following way: simultaneous data transmission over at least two frequency with or without splitting traffic data or data transmission over only one available frequency band. For data transmission, a radio frame structure (Big MAC element) is dynamically established in the so-called medium access control layer, shortened so-called MAC-layer, by using concurrent radio resources from other frequency bands or other radio access technologies.

Abstract: A method for increasing the SINR of a data transmission channel is presented. A mobile network element, in applying a first method, performs a first estimate of the channel's SINR by changing a first characteristic of a signal transmitted through the channel. The mobile network element, in applying a further method, performs a further estimate of the channel's SINR by changing at least one further signal characteristic of the signal. The mobile network element selects which method yields a higher estimate of the channel's SINR. The mobile network element transmits a feedback signal to at least one affiliated base network element indicating the selected method that yields the highest channel SINR. Applying the selected method, the affiliated base network element changes the corresponding characteristic of a signal it transmits, thereby increasing the channel's SINR.

Abstract: A method for the transmission of data between base stations and terminal devices uses at least one first time-frequency-spectrum which contains a plurality of transmission resources. A transmission resource is defined by a section of the time-frequency-spectrum, which is formed by at least one subcarrier subdivided into time slots and by at least one time slot. As part of the method, data are transmitted between a base station and a terminal device in a frame on one transmission resource. The method is characterized in that the base station transmits the data in such a way that a combination of subcarriers and/or time slots of the transmission resource used for the transmission of the frame forms a transmission pattern characterizing the nature of the data. The base station selects the transmission pattern from a number of previously defined transmission patterns, depending on the nature of the data to be transmitted.

Abstract: The invention relates to a method for transmitting signals in a radio communication system consisting of at least two frequency signal-transmitting channels. At least the first (fcoord) of said frequency channels is used for organizing radio resources, and at least the second (fi) of the frequency channels is used for transmitting signals between the stations of the system where the signal transmission is carried out by the frequency channels from/in a direction of said stations in conformity with a predefined temporal pattern (P1, P2, P3).

Abstract: A first radio station receives a message in a first frequency band from a second radio station and passes the message to a third radio station in a second frequency band, where the width of the first frequency band differs from the width of the second frequency band. The modulation of the data in the message is maintained unchanged and the first radio station is not required to perform decoding of the message.

Abstract: A method and a system for transmitting data by a transmitter over a channel having a predetermined channel quality estimate, comprises the steps of splitting (S2P) input data stream (S40, S60, S80) to be transmitted into a plurality of data sub-streams (S40a, S40b, S40c); processing (SYM1, SYM2, SYMj) each of the plurality of data sub-streams (S40a, S40b, S40c) into a plurality of symbol subsets (S41, S42, S43) by selecting a certain scheme of coded-modulation (BPSK, QPSK, 16-QAM); processing, separately, each of the plurality of symbol subsets (S41, S42, S43), via a plurality of separate Discrete Fourier Transforms (DFT1, DFT2, DFT3), herein after denoted as DFTs, to obtain a plurality of DFT-precoded data sub-streams (S44, S45, S46); allocating each DFT-precoded data sub-stream (S44, S45, S46) in a frequency resource block (RB1, RB2, RB3), via a sub-carrier mapping module (SCM), so that for each data sub-stream (S40a, S40b, S40c) the selected scheme of coded-modulation (BPSK, QPSK, 16-QAM) is chosen in depe

Abstract: A first network radio station communicates with a user station with the aid of first radio technology while a second network radio station simultaneously communicates using second radio technology, receives data on radio technologies that can be utilized by the user station, and performs a reconfiguration process allowing the second network radio station to utilize the first radio technology. The second network radio station then communicates with the user station with the aid of the first radio technology.

Abstract: Information, in particular OFDM-symbols, is transmitted via radio from an emitting unit to a receiving unit. At least one first symbol has a first total length, which includes a first time section during which first user data is transmitted and a second time section during which cyclic repetitions of the first user data are transmitted. Also, at least one second symbol has the first total length which includes a third time section, having a length different than the first time section, during which second user data is transmitted, and a fourth time section, having a length different than the second time section, during which cyclic repetitions of the second user data is transmitted.

Abstract: Data is transmitted via time division multiple access methods and every radio cell includes one base station each for the radio coverage of a plurality of mobile stations assigned to the radio cell. The base station receives, in addition to mobile station signals of its own radio cell, mobile station signals of neighboring radio cells and determines, on the basis of the mobile station signals received, a time synchronization value and/or a frequency synchronization value to which the base station synchronizes itself.

Abstract: In a method for wireless communication, a receiver receives a first signal at a first radio frequency and determines the reception level of the first signal. The receiver receives data during a reception level of the first signal at the first radio frequency. The receiver decides, based on the determined reception level, whether at least one measurement is to be taken on a second signal transmitted at a second radio frequency. A radio station carries out the method.

Abstract: A first signal containing first data multiplied by a first weight factor is transmitted from a first radio station to a first terminal. The first weight factor is calculated taking into account a second weight factor to be used by a second radio station for transmission of a second signal containing the first data multiplied by the second weight factor, such that simultaneous reception of both the first signal and the second signal at the first terminal will cause the first data to be substantially cancelled. Further, the first weight vector is calculated taking into account first and second channel state information received from the first terminal.

Abstract: A radio communications system has at least one base station and subscriber station. To transmit messages to a subscriber stations, the base station uses successive emission directions that differ from one another. The base station transmits information concerning the sequence of the use of said emission directions to subscriber stations.