Alcatel Lucent

Nokia Technologies Oy

Nokia Solutions and Networks Oy

Alcatel

Dirk Wiegner

Wolfgang Templ

Rose Fasano Kopf

Senad Bulja

Joerg Schaepperle

Florian Pivit

Ulrich Seyfried

Andreas Pascht

Andreas Wich

Wolfgang Tempi

Pawel Rulikowski

Thomas Bohn

Gerhard Luz

Simone Maier

Christoph Haslach

Wolfgang Kuebart

Thomas Merk

Anna Zakrzewska

Eric Wantiez

George Hotopan

Tobias Naβ

Robin Machinal

Patrick Jüschke

Tobias Nass

Patrick Jueschke

Aspects and embodiments provide a transceiver comprising: a transmit signal path; a receive signal path; bidirectional amplification circuitry reconfigurable for use in both the transmit signal path or receive signal path. The amplification circuitry includes at least one resonant tunnelling diode; and the control circuitry is configured to selectively couple the amplification circuitry into the transmit or receive path of the transceiver in dependence upon whether the transceiver is to operate to transmit or receive a signal. The compact and energy efficient transceiver system in accordance with aspects and embodiments recognises that the physical properties of resonant tunnelling diodes provide a mechanism for simplification of transceiver circuitry and may enable transceiver arrangements which can operate in the high mm-wave and terahertz frequency ranges.

Transceiver

Apparatus including a first transmission line for transmitting radio frequency, RF, signals and at least one RF device including at least one active semiconductor device for processing RF signals, wherein said at least one RF device is coupled to said first transmission line, and wherein said first transmission line includes an electro-chromic, EC, material a permittivity of which can be controlled by applying a first control voltage to said first transmission line.

Apparatus comprising a transmission line for radio frequency signals

Disclosed is a method which includes determining a traffic load situation and determine a category for the traffic load situation. The method also includes determining, based on the traffic load situation, one or more groups of digital to analog converters to be used, wherein the one or more groups have different resolutions for digital to analog conversions. The method may further include activating the determined one or more groups of digital to analog converters for transmitting signals. Additionally, the method may include transmitting the signals using multiple antennas.

Low consumption digital to analog conversion for antenna arrays

An apparatus that is a voltage-controlled splitting and/or switching apparatus comprising a waveguide for a radio frequency signal comprising at least one input and at least two outputs, wherein the waveguide is a cavity waveguide or a polymer microwave fiber waveguide, and the waveguide comprises at least a first branch and a second branch, at least one element comprising voltage reactive material in between electrodes and extending, at least partly, across at least one of the first branch and the second branch, and a voltage control caused to apply voltage to the at least one element.

Controllable radio frequency switching and/or splitting device

An apparatus includes a dielectric tile array including a plurality of dielectric tiles; and a plurality of electroactive (EA) material blocks configured to expand or contract in response to being actuated by the application of an actuation voltage.

Electroactive material-controlled smart surface

Methods and apparatuses for controlling radio resources of radio units in air-to-ground mobile communications systems that include at least an aircraft carrying a transceiver station and a ground basestation, apt to communicate with each other. The radio units are provided with beamforming and/or massive MEM antenna systems, and are controlled by the apparatuses using control data. The apparatuses are configured to receive flight data related to the aircraft, estimate a timed trajectory and a required data rate, as a function of the flight data. Then the apparatuses determine a sequence of control data for said antenna systems to form radio beams and/or connectivity spots directed towards said transceiver station, respectively to the ground basestation, while the allocated data rate is at least equal to the required data rate. The sequence of control data is then provided to respective antenna systems.

Flight data assisted active antenna system for air-to-ground applications

A switchable element, a device and a method for analogue and programmable computing operating on electromagnetic waves having a frequency, wherein the switchable element is configured to configured to, in response to an activation signal, switch from having a first dielectric permittivity for electromagnetic waves having a frequency to having a second dielectric permittivity for electromagnetic waves having the frequency, and the device comprises a plurality of the switchable elements that are adapted to be switched individually in accordance with the computing operation.

Switchable element

A multi antenna system, comprising a plurality of transceivers for an antenna array operable for communication with wireless terminals, wherein the multi antenna system comprises a radio controller, adapted to operate a first transceiver for radio communication within a first bandwidth, wherein the first transceiver is limited by hardware to radio communication within the first bandwidth, a second transceiver adapted for radio communication within a second bandwidth selectable from a plurality of bandwidths, a radio controller adapted to operate, depending on a data rate demand, either the first transceiver or the second transceiver or both for radio communication.

Heterogeneously equipped multi antenna system and method of operating such system

An electrically controllable RF circuit that includes an EC cell and an EAP-based actuator configured to produce relative movement of an electrode of the electrochromic cell and an electrically conducting patch or another electrode electromagnetically coupled thereto. In one embodiment, the RF circuit operates as a tunable patch antenna whose frequency characteristics can be changed by changing the bias voltages applied to the EC cell and EAP-based actuator. Advantageously, the capability to tune the antenna using two different tuning mechanisms (i.e., a dielectric-permittivity based tuning mechanism implemented using the EC cell and a geometry-based tuning mechanism implemented using the EAP-based actuator) provides more degrees of control over the pertinent antenna characteristics compared to what is available in some other antenna designs. In another embodiment, the RF circuit can operate as a tunable RF filter whose frequency characteristics can similarly be changed using these two different tuning mechanisms.

Tunable radio-frequency device having electrochromic and electro-active materials

A radio-frequency switching apparatus that can be used to turn a signal path on or off or to attenuate a radio-frequency signal. The switching apparatus comprises at least one radio-frequency input, at least one radio-frequency output, at least one transmission line providing a signal path between the at least one radio-frequency input and the at least one radio-frequency output, and at least one transition metal oxide portion. The radio-frequency switching apparatus also comprises direct current blocking means electrically coupled between the at least one transition metal portion and the at least one radio-frequency input. The radio-frequency switching apparatus also comprises biasing means for providing a bias across the at least one transition metal oxide portion such that power transferred between the radio-frequency input and the radio-frequency output is controlled by controlling the bias level across the at least one transition metal oxide portion.

Radio-frequency switching apparatus

An electrically controllable RF-circuit element that includes at least one layer of an electrochromic material sandwiched between two corresponding layers of a solid-electrolyte material and placed adjacent and along a length of RF transmission line. In one example embodiment, the electrically controllable RF-circuit element operates as a tunable band-stop (e.g., notch) filter whose stop band can be spectrally moved by changing one or more dc-bias voltages applied across the corresponding layer stack(s). In another example embodiment, the electrically controllable RF-circuit element operates as a tunable phase shifter whose phase-shifting characteristics can be changed by changing one or more dc-bias voltages applied across the corresponding layer stack(s).

Electrically tunable radio-frequency components and circuits

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.

Transceivers and methods for operating transceivers

Embodiments relate to apparatuses (), methods and computer programs for determining transmission control information. The Apparatus () is suitable for a base band unit () of a base station transceiver () of a mobile communication system (), the base station transceiver () further comprising one or more radio units () configured to wirelessly communicate with the base band unit () using one or more wireless fronthaul links. The apparatus () comprises at least one output () configured to transmit a downlink component of the one or more wireless fronthaul links to the one or more radio units (). The apparatus () further comprises at least one input () configured to receive an uplink component of the one or more wireless fronthaul links from the one or more radio units (). The apparatus () further comprises a control module () configured to control the at least one output () and the at least one input (). The control module () is further configured to transmit a reference signal via the at least one output () to the one or more radio units (). The control module () is further configured to receive a loopback version of the reference signal via the at least one input () from the one or more radio units (). The control module () 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 () for transmissions on the one or more wireless fronthaul links. The control module () is further configured to provide the transmission control information to the one or more radio units () via the at least one output ().

Determining base station fronthaul transmission control based on loopback signal

The invention concerns a method for transmission of a data signal from a transmitting device (BS) to a receiving device (RAH) using a LINC amplifier (LINC, LINC) for signal amplification, wherein the data signal is represented by two phase modulated signal components of constant amplitude in a first part of the LINC amplifier (LINC, LINC) located in the transmitting device (BS), at least one of the two phase modulated signal components of constant amplitude is transmitted over at least one optical connection (OFFF) from the transmitting device (BS) to the receiving device (RAH), and the at least one of the two phase modulated signal components of constant amplitude is converted from an optical signal into an electrical signal in at least one opto-electrical converter (OEE) located in said receiving device (RAH), a LINC amplifier, a transmitting device, a receiving device, and a communication network therefor.

Method for data transmission using a LINC amplifier, a LINC amplifier, a transmitting device, a receiving device, and a communication network therefor

A current monitor for sensing the current in a current path includes a resistive sensing element in a section of the current path and a current mirror circuit having a first semiconductor device and a second semiconductor device. Both semiconductor devices electrically interconnect with each other for copying the current in the second semiconductor device to the first semiconductor device. The first semiconductor device is electrically connected to an electric reference potential and to a current input side of the section via a resistive equivalence element in a first current branch. The second semiconductor device is electrically connected to the electric reference potential and to a current output side of the section in a second current branch. The current monitor further includes a constant current source for keeping the current in the second current branch independent from the potential difference between the potential of the current output side of the section and the reference potential.

Growing community of inventors

Schwaikheim, Germany

Dirk Wiegner