Telefonaktiebolaget Lm Ericsson (publ)

Infineon Technologies Ag

International Business Machines Corporation

Intel Mobile Communications Gmbh

Michael Meixner

Hariklia Deligianni

Jennifer L Lund

Ping-Chuan Wang

Timothy Dooling Sullivan

Christopher Vincent Jahnes

Robert Allen Groves

Panayotis Constantinou Andricacos

Andrea Camuffo

David Earle Seeger

L Paivikki Buchwalter

Bernd Adler

Leena Paivikki Buchwalter

Peter Bundgaard

Christian Mayer

Nick Shute

Mathias Pauli

Günter Märzinger

Andreas Schwarz

Guenter Maerzinger

Mats Hogberg

The present disclosure relates to methods, systems and devices for shifting a reference frequency from a first value to a second value, the shifting characterized at least in part by a controlled transition of the reference frequency at a predetermined time-rate-of-change.

Reference frequency control in multi-modal devices

This disclosure relates to providing an information signal to one or more sub-systems within a wireless communications device, where the information signal enables the sub-systems to operate based on virtually corrected reference frequency clock signal(s).

Clock distribution with forward frequency error information

A power control system includes a reference path filter used to suppress high frequencies in an input signal and generate a filtered envelope signal, a reference path amplifier to scale the filtered input signal based on a gain signal and generate a reference signal, a signal path amplifier to amplify an RF modulated signal and generate a signal path output signal scaled by a gain of an actuator signal, and a power detector to detect a power associated with the signal path output signal. The system includes an ADC to receive, pre-filter and convert the detected envelope signal into a measurement signal, and a comparator block to receive the reference signal and the measurement signal, and generate an error signal based on the difference, and a controller to generate the actuator signal for controlling the gain of the signal path amplifier based on the error signal.

Strategy for using the envelope information within a closed loop power control system

A receiver and a method are applied in a wireless communication system for detecting interference with a coexisting radar system. A signal received from an antenna is fed through an analog part and a subsequent digital part of said receiver. The receiver has an element with a-priori known attenuation values for a predefined set of frequencies, a first branch-off element for deriving a first detection signal from the signal before the element and a second branch-off element for deriving a second detection signal from the signal after the element. The receiver processes the first and the second detection signal such that a difference between the first and second detection signal is comparable with a threshold value, where the threshold value depends on the a-priori known attenuation values of the element. Depending on the comparison result, a frequency is identified as interfering or not a co-existing radar system.

Interference detection in a wireless communication system

The present invention relates to a device and a method for regulating the output power of an amplifier stage, e.g. an amplifier stage in a mobile data transmission system.

Apparatus and method for regulating the output power of an amplifier stage

A microelectromechanical switch including: at least one pair of actuator electrodes; at least one input electrode and at least one output electrode for input and output, respectively, of a radio frequency signal; and a beam movable by an attraction between the at least one pair of actuator electrodes, the movable beam having at least a portion electrically connected to the at least one input electrode and to the at least one output electrode when moved by the attraction between the at least one pair of actuator electrodes to make an electrical connection between the at least one input and output electrodes; wherein the at least one pair of actuator electrodes are electrically isolated from each of the at least one input and output electrodes. The microelectromechanical switch can be configured in single or multiple-poles and/or single or multiple throws.

Micro-electro-mechanical RF switch

Microswitch, comprising a base element (G) with a contact surface (KG) and an electrode (EG), and a switching element (S) with a contact surface (KS) and an electrode (ES) disposed opposite the electrode (EG) of the base element (G) at a distance (g). The switching element (S) is provided with a spring constant and is connected at least with a part of its edge portion with the base element (G) in a fixed manner. The contact surfaces (KG, KS) form a switching contact which is closable against a reaction force caused by the spring constant by means of a voltage applied to the electrodes (EG, ES). The base element (G) and the switching element (S) each comprise an auxiliary electrode (HG, HS) at a distance (a) from the electrode (EG, ES), to which a voltage can be applied. For opening the switching contact the electrodes (EG, ES) have a first voltage potential (U ) and the auxiliary electrodes have a second voltage potential (U ) of the voltage. The voltage potentials (U , U ) effect an accumulation of positive and negative charge carriers on the surface portions of the electrodes (EG, ES) and the auxiliary electrodes (HG, HS) such that surface portions with positive and negative charge carriers are opposite each other in a lateral direction and surface portions with the same charge carriers are opposite each other in an orthogonal direction.

Microswitch with a micro-electromechanical system

The application relates to a controllable filter ( ) that is placed between an antenna on the one side and a receiver and transmitter on the other, where the receiver branch can be switched between two filter characteristics. In this way, a simple device for allowing simplex reception in the transmission band can be provided. This filter is preferably applied as a frontend filter (FP) in the fixed part of a cordless telephone system and/or in a mobile station to thereby provide said mobile station with walkie-talkie capabilities.

Controllable filter

Growing community of inventors

Erlangen, Germany

Michael Meixner