Abstract: Exemplary embodiments of system and method are provided for measuring signal amplitude, phase and/or delay offsets between multiple transmit signals fed through the transmit signal processing chains and wirelessly transmitted over the transceive antennas of separate transceiver modules, wherein transmit signal coupling between the transmit antennas of said transceiver modules' transmit signal processing chains may be used for synchronizing the transmit signals and calibrating their amplitude, phase and/or delay parameters. The exemplary embodiments further provide a front end arrangement of a wireless transceiver device which can comprise at least two independently controllable transceiver modules, each connected to an associated spatial diversity transceive antenna and comprising at least one associated transmit signal processing chain and at least one associated receive signal processing chain coupled to a common baseband processing unit.

Abstract: Exemplary embodiments of system and method are provided for measuring signal amplitude, phase and/or delay offsets between multiple transmit signals fed through the transmit signal processing chains and wirelessly transmitted over the transceive antennas of separate transceiver modules, wherein transmit signal coupling between the transmit antennas of said transceiver modules' transmit signal processing chains may be used for synchronizing the transmit signals and calibrating their amplitude, phase and/or delay parameters. The exemplary embodiments further provide a front end arrangement of a wireless transceiver device which can comprise at least two independently controllable transceiver modules, each connected to an associated spatial diversity transceive antenna and comprising at least one associated transmit signal processing chain and at least one associated receive signal processing chain coupled to a common baseband processing unit.

Abstract: A method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit. The method comprises dividing the coverage area of the satellite communication system into one or several geographical areas; positioning one or several timing units in at least one geographical area; determining which of the satellites of the satellite communication system are visible in each particular geographical area; controlling the timing unit with a control unit, in order to minimize the time difference within the system, to listen to one or several satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition; synchronizing a predetermined number of geographical areas with each other by means of the control unit of the system such that the time difference within the system is minimized in a predetermined combination area of geographical areas.

Abstract: The invention relates to an arrangement and method for combining electric signals. The arrangement comprises: an antenna element (270) for receiving first electric signals from the environment; a receiver cable (210) in connection with the antenna element (270) for carrying the first electric signals; at least one antenna feeder cable (212) for carrying second electric signals; a transmitting antenna (250) in connection with said at least one antenna feeder cable (212) for transmitting the second electric signals, and at least one cable coupler (120) in said receiver cable (210), in which the polarity of said at least one cable coupler (120) is reversed in order to induce a local leakage current. Said at least one cable coupler (120) is arranged next to said at least one antenna feeder cable (212) for coupling the first electric signals and the second electric signals to the receiver cable (210).

Abstract: In a method of performing a network survey for a radio telecommunications network, signals from a location system external to the network are received for determining the location of the network survey device. The network survey device is located at a first location. Signals from a first base station of the network are received at the first location by the means of the network survey device, thereby measuring the synchronization of the first base station relative to a reference time-frame determined from the location system. The network survey device is moved to a second location. Signals from the first base station are received at the second location by the means of a network survey device, thereby measuring the synchronization of the first base station. The results of the measurements are compared with pre-determined network management criteria. Based upon the result of the comparison, the configuration of the network is modified.

Abstract: The invention relates to an arrangement and method for combining electric signals. The arrangement comprises: an antenna element (270) for receiving first electric signals from the environment; a receiver cable (210) in connection with the antenna element (270) for carrying the first electric signals; at least one antenna feeder cable (212) for carrying second electric signals; a transmitting antenna (250) in connection with said at least one antenna feeder cable (212) for transmitting the second electric signals, and at least one cable coupler (120) in said receiver cable (210), in which the polarity of said at least one cable coupler (120) is reversed in order to induce a local leakage current. Said at least one cable coupler (120) is arranged next to said at least one antenna feeder cable (212) for coupling the first electric signals and the second electric signals to the receiver cable (210).

Abstract: A device for transferring electromagnetic waves, comprising at least one element (32, 33) for transceiving electromagnetic waves, wherein such an element includes a member for transceiving electromagnetic waves and a member for feeding said transceiving member, and both members are electrically connected with each other, and a conductor strip (101; SDCS, MDCS) which is bent around each of said transceiving elements so that sources of unwanted radiation pattern along said transceiving elements are covered, said conduct or strip having a flat shape so that regarding its cross section, a thickness perpendicular to said transceiving element is small with respect to a dimension of said conductor strip parallel to said transceiving element, the extension of which dimension also suffices to cover said not wanted sources, wherein each of said conductor strips is grounded at both ends to a common electrical point.

Abstract: The invention relates to a method for calculating an absolute time difference in a radio system, and to a radio system. In the radio system, location measurement units are maintained, the location measurement units receiving signals from base transceiver stations; a reference time for the reference base transceiver station and the detected time differences of the base transceiver stations are specified; the reference time of the reference base transceiver station and the detected time differences of the other base transceiver stations are reported; a computational absolute time is calculated; a corrected absolute time for the reference base transceiver station is calculated by using the computational absolute time, the reported reference base transceiver station reference time and a correction coefficient. Finally, the corrected absolute time and the detected time differences are used for calculating the absolute time differences, and the computational absolute time differences are stored.

Abstract: The invention relates to a method for calculating an absolute time difference in a radio system, and to a radio system. In the radio system, location measurement units are maintained, the location measurement units receiving signals from base transceiver stations; a reference time for the reference base transceiver station and the detected time differences of the base transceiver stations are specified; the reference time of the reference base transceiver station and the detected time differences of the other base transceiver stations are reported; a computational absolute time is calculated; a corrected absolute time for the reference base transceiver station is calculated by using the computational absolute time, the reported reference base transceiver station reference time and a correction coefficient. Finally, the corrected absolute time and the detected time differences are used for calculating the absolute time differences, and the computational absolute time differences are stored.

Abstract: A device for transferring electromagnetic waves, comprising at least one element (32, 33) for transceiving electromagnetic waves, wherein such an element includes a member for transceiving electromagnetic waves and a member for feeding said transceiving member, and both members are electrically connected with each other, and a conductor strip (101; SDCS, MDCS) which is bend around each of said transceiving elements so that sources of not wanted radiation pattern along said transceiving elements are covered, said conduct or strip having a flat shape so that regarding its cross scction, a thicknless perpendicular to said transceiving element is small with respect to a dimension of said conductor strip parallel to said transceiving element, the extension of which dimension also suffices to cover said not wanted sources, wherein each of said conductor strips is grounded at both ends to a common electrical point.

Abstract: A method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit. The method comprises dividing the coverage area of the satellite communication system into one or several geographical areas; positioning one or several timing units in at least one geographical area; determining which of the satellites of the satellite communication system are visible in each particular geographical area; controlling the timing unit with a control unit, in order to minimize the time difference within the system, to listen to one or several satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition; synchronizing a predetermined number of geographical areas with each other by means of the control unit of the system such that the time difference within the system is minimized in a predetermined combination area of geographical areas.