Intel Corporation

Infineon Technologies Ag

Intel Mobile Communications Gmbh

Apple Inc.

Intel Deutschland Gmbh

Intel IP Corporation

Christian Mayer

Jan M Zaleski

Jovan Markovic

Harald Pretl

Burkhard Neurauter

Andreas Schwarz

Thomas Mayer

Andrea Camuffo

Krzysztof Dufrene

Nick Shute

Günter Märzinger

Guenter Maerzinger

Patrick Ossmann

Gerald Eschlboeck

Andreas Menkhoff

Franz Kuttner

Andreas Langer

Rastislav Vazny

Joonhoi Hur

Bernd Adler

Gernot Hueber

Bernhard Sogl

Timo Gossmann

Gunther Kraut

Peter Bundgaard

Jochen Schrattenecker

Andreas Mayer

Michael Meixner

Helmut Herrmann

Hermann Hofer

Damir Hamidovic

Konrad Hirsch

Guenther Haberpeuntner

José Pedro Diogo Faisca Moreira

Hans Henningsen

Herwig Dietl

Christian Lederer

An electronic device may include radar circuitry. Control circuitry may calibrate the radar circuitry using a multi-tone calibration signal. A first mixer may upconvert the calibration signal for transmission by a transmit antenna. A de-chirp mixer may mix the calibration signal output by the first mixer with the calibration signal as received by a receive antenna or loopback path to produce a baseband multi-tone calibration signal. The baseband signal will be offset from DC by the frequency gap. This may prevent DC noise or other system effects from interfering with the calibration signal. The control circuitry may sweep the first mixer over the radio frequencies of operation of the radar circuitry to estimate the power droop and phase shift of the radar circuitry based on baseband calibration signal. Distortion circuitry may distort transmit signals used in spatial ranging operations to invert the estimated power droop and phase shift.

Electronic devices having spatial ranging calibration capabilities

Embodiments provide a pre-distortion circuit and apparatus, a method and computer program for pre-distorting, a transmitter, a radio transceiver, a communication device, a mobile transceiver, a base station transceiver and a storage. The pre-distortion circuit () is configured for a digital quadrature signal. The pre-distortion circuit () comprises a first input () for an inphase component of the quadrature signal and a second input () for a quadrature component of the quadrature signal. The pre-distortion circuitcomprises a signal processing circuit () configured to determine whether polarities of the inphase component and quadrature component are equal, and to determine pre-distortion coefficients based on the amplitude of the inphase component, the amplitude of the quadrature component, and based on whether the polarities are equal.

Pre-distortion circuit, apparatus, method and computer program for pre-distorting, transmitter, radio transceiver, mobile transceiver, base station transceiver, communication device, storage

A method configured to clip an I signal and a Q signal according to a clipping boundary, includes receiving an I value and a Q value, wherein the I value and Q value define Cartesian coordinates of a data point being transmitted on the real and imaginary axes of the complex plane, respectively; determining a clipping error between the I value and the Q value and the clipping boundary; combining the clipping error with the I value to generate a clipped I value; combining the same clipping error with the Q value to generate a clipped Q value; and providing the clipped I value and the clipped Q value to a radio frequency digital-to-analog converter (RFDAC) in a transmit chain.

Peak-to-average power ratio reduction for IQ transmitters

A communication system receives an input signal along a signal processing path and generates a converted output signal via a digital-to-analog converter (DAC). The signal processing path branches into two different branches, a magnitude branch and a sign branch for different components of the baseband signal. A local oscillator (LO) provides a carrier signal to the signal processing path at the DAC and further generates an LO leakage signal comprising a signed LO leakage and an unsigned LO leakage during the up-conversion of signals of the sign branch with a carrier. An unsigned LO suppression component is configured to reduce or eliminate the unsigned LO leakage and a signed LO suppression component is configured to reduce or eliminate the signed LO leakage form a baseband signal of the signal processing path.

Signed local oscillator leakage cancelation

An apparatus and a method for synchronizing a Digital Frequency Shift (DFS) for a signal to be transmitted over a wireless channel are disclosed. For example, the method, by a synchronizer, transmits a DFS trigger to a Digital Front End (DFE) processor and a Local Oscillator (LO) trigger to an LO in a synchronous manner, the method, by the DFE processor, applies a DFS on received data in response to receiving the DFS trigger, the method, by the LO, applies a complementary shift on a carrier signal in response to receiving the LO trigger, the method, by the upconverter, digital-to-analog converts and radio frequency modulates the digital frequency-shifted received data and the complementary-shifted carrier signal. In another example, the method, by the synchronizer, transmits a phase error to a phase error corrector that performs a phase error correction.

Synchronizing a digital frequency shift

A communication system using an increased sampling rate includes a baseband signal generator and a PLL that generates an LO signal and an inverted LO signal. An interpolator generates an interpolated/delayed data stream from a baseband original data stream, and a cell control circuit generate control signals based on the interpolated data stream and the baseband original data stream. An RFDAC generates an RF output signal from the baseband signal using an increased sampling rate, the LO signal, the inverted LO signal, and the control signals.

Modifying a sampling frequency in a radio frequency digital to analog converter

An apparatus for generating a radio frequency signal based on a symbol within a constellation diagram is provided. The constellation diagram is spanned by a first axis representing an in-phase component and an orthogonal second axis representing a quadrature component. The apparatus includes a processing unit configured to select one of a plurality of segments of the constellation diagram containing the symbol. The segment is delimited by two radially extending boundaries, wherein the two radially extending boundaries span an opening angle of the segment that is different from 90&#xb0;. The processing unit is further configured to calculate a first coordinate of the symbol with respect to a third axis, and a second coordinate of the symbol with respect to a fourth axis. At least one of the third axis and the fourth axis coincides with one of the two radially extending boundaries. The apparatus further includes a plurality of digital-to-analog converter cells configured to generate the radio frequency signal using the first coordinate and the second coordinate.

Apparatus and a method for generating a radio frequency signal

Disclosed herein is an apparatus and methodology for reducing peak-to-average-power ratio (PAPR) for IQ radio frequency digital-to-analog converter (RFDAC). Processing circuitry may be configured to generate a digital signal comprising an in-phase (I) signal component and a quadrature (Q) signal component having a peak-to-average-power-ratio (PAPR). The processing circuitry may determine the I signal component and the Q signal component are higher than a predetermined threshold value, and limit the I signal component and the Q signal component to be less than or equal to the predetermined threshold value. The processing circuitry may rotate the signal components to generate rotated signal components to reduce the PAPR based on the I and Q signal components having less than or equal to the predetermined threshold value, and may generate an output radio frequency (RF) signal based on the rotated signal components.

PAPR reduction for IQ RFDAC

An apparatus for generating a transmit signal includes an up-conversion module and a delay module. The up-conversion module up-converts a first component signal of a multi-phase baseband transmit signal using a first oscillator signal and up-converts a delayed second component signal of the multi-phase baseband transmit signal using a second oscillator signal to generate a radio frequency transmit signal. The first oscillator signal and the second oscillator signal comprise an oscillator signal phase offset so that an edge of the second oscillator signal occurs earlier than a corresponding edge of the first oscillator signal. The delay module delays a second component signal of the multi-phase baseband transmit signal relative to the first component signal of the multi-phase baseband transmit signal by a predefined component signal delay to generate the delayed second component signal of the multi-phase baseband transmit signal.

Apparatus and method for generating a transmit signal

A multicarrier transmitter has a first mode, in which the transmitter is configured to transmit a first component carrier signal modulated onto a first carrier by using a first LO signal, and a second mode, in which the transmitter is configured to transmit the first component carrier signal modulated onto the first carrier and a second component carrier signal modulated onto a second carrier by using a second LO signal. The multicarrier transmitter is coupled to a controllable oscillator and configured to adapt a frequency of an LO signal output by the controllable oscillator dependent on the multicarrier transmitter being activated in the first or second mode to output the first LO signal or the second LO signal. For example, the multicarrier transmitter may be configured to switch between the first mode and the second mode while transmitting the component carrier signals.

Transmitter and receiver

A method and an apparatus provide a plurality of modulated signals by frequency shifting an output signal of a carrier signal generation circuit for obtaining a first carrier signal and a second carrier signal, and by modulating the first and second carrier signals.

Method and apparatus for generating a plurality of modulated signals

A communication system includes a first DAC array, a second DAC array, and a merge component. The first DAC array is configured to receive a first portion of modulation signals and to generate a first RF signal according to a modulation mode. The second DAC array is configured to receive a second portion of the modulation signals and to generate a second RF signal according to the modulation mode. The merge component is configured to receive the first RF signal and the second RF signal. The merge component is also configured to generate an output RF signal according to the first RF signal and the second RF signal, wherein the output RF signal has a modulation format according to the modulation mode.

Communication systems and methods supporting multiple modulation techniques

An amplifier circuit includes a gain controller, a first amplifier, and a second amplifier which is coupled in series to the first amplifier, the second amplifier comprising a plurality of amplifying units. The gain controller is configured to receive a desired gain value and provide, based on the received desired gain value, a gain adjust signal to the first amplifier, and activate, based on the received desired gain value, a certain combination of amplifying units of the plurality of amplifying units of the second amplifier, such that a combined gain of the first amplifier and the active amplifying units of the second amplifier corresponds to the received desired gain value.

Amplifier circuit, method and mobile communication device

This disclosure relates to a continuous open loop control to closed loop control transition.

Continuous open loop control to closed loop control transition

A receiver is provided with a digital signal processing circuit to process a receive signal. In addition, the receiver includes an interference detector to detect an interference scenario affecting reception of the signal by the receiver. Depending on the interference scenario detected by the interference detector, the digital signal processing circuit is adapted.

Growing community of inventors

Linz, Austria

Christian Mayer