Abstract: An amplifier arrangement for amplifying a radio signal comprising at least a first amplifier module and a second amplifier module is presented wherein a splitter stage for dividing an amplifier stage input signal into several signal portions. The signal portions are amplified in the at least two parallel amplifier modules. A combiner stage combines the separate amplifier output signals into a single amplifier arrangement output signal.

Abstract: The application relates to a method for configuring ports of radio equipments connected to an internal network of a base station of a mobile communications network. The application also relates to the corresponding radio equipment and the corresponding radio equipment controller The method comprises: activating at least one port of the radio equipment to become an activated port, changing the activated at least one port to a non-connected slave state in which the activated at least one port listens to a communication on a link of the internal network for a time period, upon detection of the communication on the link changing the activated at least one port to a connected slave state, or upon expiry of the time period changing the activated at least one port to a non-connected master state in which the activated at least one port actively sends data into the link of the internal network.

Abstract: An active antenna array comprises a plurality of transmission paths, a variable common power supply unit, and an envelope detection system. The transmission paths are adapted to carry a plurality of similar transmission path signals, wherein at least one of the plurality of transmission paths comprises an amplifier having a power input and a signal input for one of the plurality of similar transmission path signals. The variable common power supply unit is connected to the power input of the amplifier for supplying power to the amplifier. The envelope detection system is connected to an envelope input of the variable common power supply unit and adapted to provide a common envelope signal for the plurality of similar transmission path signals to the variable common power supply unit. A method for envelope tracking and computer program products for manufacture and method execution are also claimed.

Abstract: The present disclosure relates to a radio station providing a digital predistortion to be imposed on a payload signal. The digital predistortion is usable as a general predistortion for several transmit paths of the radio station. The radio station provides coupled transmit signals to be combined within a combiner forming a common feedback signal. The common feedback signal is relayed along a common feedback path. A digital predistortion update unit to updates the digital predistortion in order to linearize a transfer characteristics of the transmit paths. The disclosure relates to a method of digitally predistorting a payload signal in order to linearize a transmit characteristics of the transmit paths. The disclosure further relates to computer program products for the manufacture of the radio station and/or a computer product for the execution of the method digitally predistorting. The disclosure further relates to an antenna array comprising the radio station.

Abstract: A monitor for a transmitter, receiver, or transceiver is proposed. The transmitter, receiver or transceiver has at least one component with at least one varying setting parameter controlled by a parameter controller to adjust a spectral degradation of a signal processed by the transmitter, receiver, or transceiver. The monitor comprises an input for receiving the at least one varying setting parameter from the parameter controller, and a setting parameter analyzer for evaluating the at least one varying setting parameter to determine whether the at least one component is normally operating within a desired operating range and to issue a warning signal in case the at least one component is abnormally operating within the desired operating range. The varying setting parameter may be, for example, predistortion parameters or tuning parameters of a voltage controlled oscillator. A corresponding method for monitoring a transmitter, receiver or transceiver is also proposed.

Abstract: A radio station providing a digital predistortion to be imposed on a payload signal is disclosed. The digital predistortion is usable as a digital predistortion for one or more of the transmit paths of the radio station. The radio station provides coupled transmit signals to be switched as a selected one of the coupled transmit signals along a common feedback path. A digital predistortion update unit is adapted to update the digital predistortions in order to linearise a transfer characteristics of the transmit paths according to a hierarchy of the transmit paths. A method of digitally predistorting a payload signal in order to linearise a transmit characteristics of the transmit paths is disclosed.

Abstract: An active antenna array for a mobile communications system is disclosed which comprises a plurality of receive paths in which an individual one of the receive paths is connected between an antenna element and an analogue to digital converter and wherein the analogue to digital converter digitises a receive signal to form a digitised receive signal. The active antenna array further comprises a sounding signal generator for generating a sounding signal in which the sounding signal is supplied to at least two of the plurality of receive paths and a receive signal subtraction device for subtracting a wanted signal from the digitised receive signal.

Abstract: The present disclosure teaches an active antenna array for a mobile communications network. The active antenna array comprises a plurality of first polarization antenna elements and a plurality of second polarization antenna elements. The plurality of first polarization antenna elements is connected to a first protocol signal generator. The plurality of first polarization antenna elements are adapted to radiate an individual first protocol transmit signal. An individual one of the plurality of second polarization antenna element is connected to an individual one of a plurality of second protocol signal generators. The plurality of second polarization antenna elements is adapted to radiate an individual second protocol transmit signal. An individual one of the plurality of first polarization antenna elements and the individual one of the plurality of second polarization antenna elements are adapted to receive both, an individual first protocol receive signal and an individual second protocol receive signal.

Abstract: A base-station failure predictor comprises an interface to at least one sub-unit of a base-station of a mobile communications network, an alarm memory, and an alarm evaluator. The base-station failure predictor is adapted to receive a plurality of alarms from the at least one sub-unit of the base-station via the interface. The plurality of alarms are stored in the alarm memory, and the alarm evaluator is adapted to analyze the frequency of the plurality of alarms to assess a likelihood of failure of the at least one sub-unit concerned. A base-station failure prediction method is also proposed. Furthermore, a computer program product with instructions for the manufacture and a computer program product enabling a processor to carry out the base-station prediction method are also proposed.

Abstract: The present disclosure teaches an active antenna array for a mobile communications network. The active antenna array comprises a plurality of antenna elements, a first port, a first DC voltage supply and at least one DC voltage extractor. The plurality of antenna elements relays at least first protocol radio signals. The first port is connected to at least one individual first protocol relay path. The first port relays a general first protocol receive signal to a first protocol link. The first DC voltage supply provides a first DC voltage to at least a portion of the first protocol link. The at least one DC voltage extractor, is located in the at least one individual first protocol relay path. The DC voltage extractor extracts at least one individual DC voltage to supply an at least one amplifier.

Abstract: A filtering device comprises an analogue quadrature splitter together with a first filtering element and a second filtering element. The filtering device is adapted to transform filtering characteristics of the first filtering element and filtering characteristics of the second filtering element into an effective filtering characteristic present in an output signal at an output terminal of the analogue quadrature splitter. The first filtering element and the second filtering element comprise filtering elements of high accuracy, with a steep roll-off but poor power handling capabilities. Using a high power quadrature splitter it is possible to transform the filtering characteristics of the first filtering element and/or the second filtering characteristic of the second filtering element into the effective filtering characteristics.

Abstract: An amplifier arrangement with an amplifier arrangement input and an amplifier arrangement output is disclosed. The amplifier arrangement comprises a first transistor and a first ballast resistance, wherein the first ballast resistance connects a first transistor base of the first transistor to a common base terminal at least one second transistor and at least one second ballast resistance, wherein the at least one second ballast resistance connects a second transistor base of the at least second transistor to the common base terminal; and a feedback device comprising a feedback input terminal for sensing at least a base voltage of the first transistor and further comprising a feedback output terminal that is connected to the common base terminal.

Abstract: An active antenna system and a method for relaying radio signal in the mobile communications network is disclosed. The active antenna system comprises a plurality of antenna elements for relaying radio signals at a first frequency band. The antenna elements are connected to a plurality of signal paths. A plurality of signal inputs for inputting radio signals at a second frequency band is connected to the signal paths. A plurality of first mixers in the signal paths converts the frequency of the radio signals between the first frequency band and the second frequency band. A single first local oscillator is connected to the first mixers through a first oscillator signal path and supplies first oscillator signals to the first mixers and at least one dispersion element is connected to at least one of the signal paths.

Abstract: The present invention provides a radio system and a method for relaying radio signals. The radio system and the method provide a calibration of transmit radio signals in which no dedicated calibration signal generator is required for calibrating the radio system. The radio system comprises at least one transmit path, a calibration unit at the least one link. A coupled transmit signal is extracted from the transmit paths and selectively forwarded as a feedback signal to a feedback signal demodulator. The feedback signal demodulator generates a base band feedback signal adapted for updating phase and amplitude changes applied a calibrated payload signal.

Abstract: A delta-sigma modulator is disclosed which has a filter comprising a filter input, two LC resonators (LC1-1, LC1-2), and two switches (CBT/CGT). An input of each one of the two switches is connected to the filter input and a corresponding output of each one of the two switches is connected to a corresponding one of said LC resonators. Each one of the two switches is individually controllable for selectively connecting the corresponding one of the LC resonators with the filter input. The invention also relates to a method for changing the mode of operation of a delta-sigma modulator.

Abstract: An asynchronous delta-sigma modulator is proposed that comprises an input port, a filter, an envelope path, a phase path, an amplifier, and a feedback path that conveys the amplifier output signal to the filter. The envelope path extracts an envelope from the signal provided by the filter and issues an envelope signal. The phase path processes or processes a phase from the signal provided by the filter and issues a phase signal. The amplifier comprises input ports for the envelope signal and the phase signal. The amplifier issues an amplifier output signal based on said envelope signal and said phase signal. The feedback path conveys the amplifier output signal to the filter. The feedback signal contains both amplitude information and phase information. A corresponding method and computer-program products usable for production and operation of the delta-sigma modulator are also disclosed.

Abstract: The present disclosure teaches a calibration system, a calibration apparatus and a method for calibrating a signal path and a method for calibrating a delay. The calibration system comprises an injector, a calibration signal generator, a correlator, a detector unit, a polygon former and a pattern classifier unit. The calibration system is adapted to calculate a fraction of a delay from a set of polygons. The delay is being accumulated along a signal path. The fraction of the delay is indicative of an accuracy of the delay at a fine sampling rate as if the delay was measured at the fine sampling rate being an integer multiple of the coarse sampling rate. The method for calibrating of the signal path uses a calibration signal sampled at a coarse sampling rate. Correlation techniques are used in order to detect a fraction of the delay from a set of polygons.

Abstract: An amplifier arrangement for amplifying a radio signal comprising at least a first amplifier module and a second amplifier module is presented wherein a splitter stage for dividing an amplifier stage input signal into several signal portions. The signal portions are amplified in the at least two parallel amplifier modules. A combiner stage combines the separate amplifier output signals into a single amplifier arrangement output signal.

Abstract: An amplifier for amplifying a radio signal to a defined power output level is presented, wherein the amplifier comprises an amplifier input port, an amplifier output port, a first transistor for amplifying the radio signal received at a first transistor control input, wherein a first transistor output of the first transistor is supplied by a first power source; a at least second transistor for supplying the first transistor from a at least second power supply source. The at least second power supply source is added by the at least second transistor as a function of the power output level of the amplifier.

Abstract: A radio transmitter is disclosed which comprises at least two transmit paths. A combiner is connected to the at least two transmit paths for combining modified transmit signals on the at least two transmit paths to form a combined signal. The radio transmitter further comprises a; power amplifier for receiving and power amplifying the combined signal resulting in an amplified combined signal, at least one feedback path for sampling the amplified combined signal and at least two predistortion elements connected to the at least one feedback path and adapted to produce at least two individual predistortion functions for modification of the transmit signals in the at least two frequency bands to produce the modified transmit signals on the at least two transmit paths, resulting in a corrected amplified combined signal. A method for the transmission of a combined signal, wherein the combined signal comprises signals from different frequency bands, is also disclosed.