Infineon Technologies Ag

Apple Inc.

Intel Corporation

Intel Mobile Communications Gmbh

Intel Deutschland Gmbh

Gunther Kraut

Andreas Langer

Andreas Menkhoff

Christoph Hepp

Elmar Wagner

Andrea Camuffo

Grigory Itkin

Alexander Belitzer

Stefan Herzinger

Burkhard Neurauter

Berndt Pilgram

Jonas Eric Sebastian Fritzin

Bernd Adler

Jan-Erik Mueller

Dietmar Wenzel

Michael Asam

Timo Gossmann

Ernst Seler

Hao Li

Martin Simon

Christian Mayer

Pablo Herrero

Günter Märzinger

Mario Huemer

Guenter Maerzinger

Werner Hein

Armando Cova

Josef Kulmer

Thomas Puehringer

Patrick Hoelzl

Friedrich Seebacher

Gerald Eschlboeck

Xiaopin Zhang

Oleksiy Klymenko

Siegfried Brandstaetter

José Pedro Moreira Diogo Faisca

Ernst Josef Kristan

Qi Yu

Junqi Liu

Michael Wekerle

Andreas Voggeneder

Manuel Jung

Wandad Sadat-Guscheh

A predistortion circuit for a wireless transmitter includes a signal input configured to receive a baseband signal. Further, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a select of one of a first predistorter configuration and a second predistorter configuration.

Predistortion circuit, method for generating a predistorted baseband signal, control circuit for a predistortion circuit, method to determine parameters for a predistortion circuit, and apparatus and method for predistorting a baseband signal

A phase shifter for adjusting a phase shift between an input signal and output signal of the phase shifter includes: a first signal path between the input and the output; a second signal path between the input and the output; and a phase-shifter circuit configured to shift a phase of a first signal of the first signal path and a phase of a second signal of the second signal path by a constant phase angle relative to each other. The first and second signal paths each comprise a voltage-divider circuit connected to its respective signal path and configured to adjust an amplitude of a signal of the respective signal path. The output signal is based on a combination of the first signal and the second signal.

Phase shifter system and method

According to a first example implementation, the method comprises providing a local oscillator signal in a first radar chip based on a local oscillator signal generated in a further radar chip; supplying the local oscillator signal to a transmission channel of the first radar chip which, based on the local oscillator signal, generates an HF output signal; changing the temperature and/or supply voltage of the first radar chip; measuring phase values based on the local oscillator signal supplied to the transmission channel and of the corresponding HF output signal for different temperature values and/or for different supply voltage values of the first radar chip; and ascertaining calibration data based on the measured phase values for a phase calibration to compensate for changes in the phase of the HF output signal resulting from a change in the temperature and/or in the supply voltage.

Ascertainment of calibration data to take temperature and voltage dependency of the HF radar signal phases in a radar system into consideration

Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided. A method includes shifting a center frequency of an input signal by an offset to generate an adapted signal; predistorting the adapted signal based on a predistortion function to generate a predistorted adapted signal; reverting the shifting of the center frequency of the predistorted adapted signal by the offset to generate a predistorted signal; and causing transmission of the predistorted signal by a transmit chain.

Digital predistortion of signals

A method for determining phase information in a radar system comprises receiving a first RF oscillator signal at a first input node and receiving a second RF oscillator signal at a second input node, wherein an arrangement having a multiplicity of delay elements is connected between the first input node and the second input node, and wherein corresponding RF signals representing a superposition of first RF oscillator signal and second RF oscillator signal are present at different positions of the arrangement. The method further comprises generating measurement values representing the amplitudes of the RF signals, generating digital representations of the measurement values, and calculating a relative phase value, representing the difference between the phase of the second RF oscillator signal and the phase of the first RF oscillator signal, on the basis of the digital representations of the measurement values.

Phase measurement in a radar system

An apparatus for a mobile communication device adapted for digital pre-distortion that includes a memory and a processor operatively coupled to the memory of the processor. The processor receives a first input signal and also receives a first output signal from a power amplifier that is based on the first input signal. The processor additionally varies compression applied to a second input signal based on the first output signal of the power amplifier, generates a distortion compensation vector for the second input signal based on the first output signal of the power amplifier, and also varies an input excitation signal supplied to the power amplifier based on the first output signal of the power amplifier.

Feedback control systems for wireless devices

Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided in which the function is determined based on a first digital signal or a first transmit chain state. A method includes: receiving a second digital signal that is input to the transmit chain, wherein the transmit chain is characterized by a present transmit chain state; performing a first operation on the second digital signal to generate an adapted digital signal, wherein the first operation is based on either a relationship between the first digital signal and the second digital signal, or a relationship between the first transmit chain state and the present transmit chain state; predistorting the adapted digital signal based on the predistortion function; and performing a second operation on the predistorted adapted signal, wherein the second operation corresponds to an inverse of the first operation.

An apparatus for amplifying a transmit signal includes a power amplifier module arranged within a transmit path to be coupled to an antenna module. The power amplifier module is configured to amplify a transmit signal. Further, the apparatus includes a coupling module arranged between the power amplifier module and the antenna module. The coupling module is configured to provide a reverse feedback signal substantially generated by a part of the amplified transmit signal reflected by the antenna module. Further, the apparatus includes a determining module configured to determine a delay information on a delay between the transmit path and an envelope tracking path based on at least the reverse feedback signal. Additionally, the apparatus includes a power supply module arranged within the envelope tracking path configured to vary a power supply of the power amplifier module based on a transmit signal envelope information with a temporal alignment depending on the delay information.

Apparatus and a method for amplifying a transmit signal

Described herein are devices and methods for implementing a transceiver with independently controlled components. The components may include a programmable digital portion, a dedicated digital portion, and an analog portion. Each independently controlled component includes a programmable controller that resides in the programmable digital portion of the component that controls components in the dedicated digital or analog portions using state transition information. The programmable controller is configured to accommodate a broad spectrum of state transition information and is capable of emulating a plurality of hardwired finite state machines

Control architectures for RF transceivers

An antenna tuner control system includes an RF path, a lookup table and a state table analysis component. The RF path is configured to generate an RF signal. The lookup table has a state table that correlates antenna states with impedance values. The state table analysis component is configured to generate a tuner control signal from the RF signal using the lookup table.

Antenna tuner control system using state tables

In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode.

Methods for calibrating a transmitter, and radio transmitter

An apparatus for amplifying a transmit signal comprises a transmit path comprising a power amplifier module to be coupled to an antenna module. The power amplifier module is configured to amplify a transmit signal. Further, the apparatus comprises an envelope tracking path comprising a variable delay module and a power supply module. The variable delay module is configured to vary a signal delay within the envelope tracking path according to a delay control parameter. Further, the apparatus comprises a delay control module configured to provide the delay control parameter based on a current characteristic transmit frequency of the transmit signal.

Apparatus and method for amplifying a transmit signal or for determining values of a delay control parameter

An envelope tracking system and a method for adjusting a nonlinear transfer function of an envelope tracking power supply for a power amplifier are provided. An output signal of the power amplifier is provided to a feedback receiver for determining an actual performance of the envelope tracking power amplifier. An assumed performance of the envelope tracking power amplifier is determined by evaluating the non-linear transfer function at a value defined by an input signal for a transmitter including the power amplifier. A difference between the assumed performance and the actual performance provides a correctional value for the nonlinear transfer function.

Recalibration of envelope tracking transfer function during active transmission

Growing community of inventors

Egmating, Germany

Gunther Kraut