Abstract:
Embodiments relate to apparatuses (10; 20), methods and computer programs for determining transmission control information. The Apparatus (10) is suitable for a base band unit (110) of a base station transceiver (100) of a mobile communication system (300), the base station transceiver (100) further comprising one or more radio units (120) configured to wirelessly communicate with the base band unit (110) using one or more wireless fronthaul links. The apparatus (10) comprises at least one output (12) configured to transmit a downlink component of the one or more wireless fronthaul links to the one or more radio units (120). The apparatus (10) further comprises at least one input (14) configured to receive an uplink component of the one or more wireless fronthaul links from the one or more radio units (120). The apparatus (10) further comprises a control module (16) configured to control the at least one output (12) and the at least one input (14). The control module (16) is further configured to transmit a reference signal via the at least one output (12) to the one or more radio units (120). The control module (16) is further configured to receive a loopback version of the reference signal via the at least one input (14) from the one or more radio units (120). The control module (16) is further configured to determine transmission control information based on an attenuation of the reference signal determined based on the loopback version of the reference signal. The transmission control information comprises information related to a per-radio unit transmission power to be used by the one or more radio units (120) for transmissions on the one or more wireless fronthaul links. The control module (16) is further configured to provide the transmission control information to the one or more radio units (120) via the at least one output (12).
Abstract:
A transceiver includes a transmit signal path, a receive signal path, an amplifier, and control circuitry. The control circuitry is configured to couple the amplifier in the transmit signal path to amplify a transmit signal during a transmit operating mode of the transceiver. Furthermore, the control circuitry is configured to couple the amplifier in the receive signal path to amplify a receive signal during a receive operating mode of the transceiver.
Abstract:
Embodiments relate to an apparatus (10), a transmitter (300), a method and a computer program suitable for controlling a contribution of a first plurality of continuously oscillating nano-mechanical oscillator modules (100a; 100b) to a composite signal (50). The apparatus (10) comprises at least one interface (12) to transmit a control signal and to obtain information related to a plurality of frequency components of the composite signal. The apparatus (10) further comprises a control module (14) to determine the control signal based on the information related to the plurality of frequency components. The control signal controls the contribution of the first plurality (100a; 100b) to the composite signal (50).
Abstract:
Embodiments relate to a concept for amplifying an input signal (112) having a varying signal envelope corresponding to an input signal frequency spectrum, the concept comprising generating (410) a pulse-width modulated signal (115) based on a periodic oscillator signal (113) and the received input signal (112), amplifying (420) the generated pulse-width modulated signal (115) with a switch-mode amplifier circuit (120) to obtain an amplified pulse-width modulated signal (125) at an output of the switch-mode amplifier circuit (120), terminating (430), in the amplified pulse-width modulated signal (125), at least one undesired spectral component (220; 230; 240) originating from the periodic oscillator signal (113) to obtain a terminated signal (325), and reconstructing (440) an amplified version of the input signal (112) based on the terminated signal (325).
Abstract:
The invention relates to a radio frequency, RF, signal generator (100), for providing an RF signal (RF_out), said RF signal generator (100) comprising: - at least two coupling elements (2; 41; 51), wherein each coupling element (2; 41; 51) comprises two coupling electrodes (3a, 3b) at least one of which is capable of performing a mechanical self-oscillation with a specific resonance frequency (fl, .., fN) and/or a specific attenuation to enable an electric coupling between said coupling electrodes (3a, 3b) which depends on said specific resonance frequency (fl, .., fN) and/or specific attenuation, - stimulating means (IG1, IG2, .., IGN) that are configured to selectively stimulate a mechanical self-oscillation of at least one of said coupling elements (2; 41; 51), and - signal processing means (22) configured to determine at least one parameter characterizing an actual resonance frequency and/or an actual attenuation exhibited by at least one coupling element (2; 41; 51) in response to a stimulation applied by said stimulating means (IG1, IG2, .., IGN).
Abstract:
The invention concerns a method for transmission of signals comprising envelope signal components from a transmitting device (BS) to a receiving device (RAH1), wherein electrical signal components are digitally modulated in the transmitting device (BS) resulting in electrical digital signal components, the electrical digital signal components are converted into optical digital signal components and transmitted over an optical connection (OF1, OF2) from the transmitting device (BS) to the receiving device (RAH1), the optical digital signal components are converted into electrical digital signal components in the receiving device (RAH1), the electrical digital signal components are converted into electrical analogue signal components in the receiving device (RAH1), and said signals are amplified in an analogue radio frequency power amplifier (PA), a transmitting device and a receiving device therefor.