Intel Corporation

Skyworks Solutions, Inc.

Infineon Technologies Ag

Intel Mobile Communications Gmbh

Intel IP Corporation

Thorsten Tracht

David Richard Pehlke

Poul Olesen

Werner Schelmbauer

Anand Raghavan

Amir Israel Rubin

Wolfgang Thomann

Ofer Benjamin

Assi Jakoby

Clemens Troebinger

Andreas Menkhoff

Sabine Roessel

Elmar Wagner

Thomas Mayer

Grigory Itkin

Timo Gossmann

Christian Wicpalek

Burkhard Neurauter

Andre Hanke

Bernd Schmandt

Andreas Mayer

Günter Märzinger

Peter Noest

Guenter Maerzinger

Irene Schuster

Guenther Hackl

Christian Ewert

Greg Chance

Peter Bode

RF communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, a method of interference cancellation includes filtering a radio frequency (RF) transmit signal to generate a first RF feedback signal using a first filter of a front end system, filtering the RF transmit signal to generate a second RF feedback signal using a second filter of the front end system, processing the first RF feedback signal to generate a first digital interference cancellation signal using a first feedback receiver, processing the second RF feedback signal to generate a second digital interference cancellation signal using a second feedback receiver, and compensating an RF receive signal for interference based on the first digital interference cancellation signal and the second digital interference cancellation signal using a receiver.

Mixed signal low noise interference cancellation

Antenna-plexers for interference cancellation are provided herein. In certain embodiments, a wireless device includes an antenna, an antenna-plexer coupled to the antenna and configured to generate a feedback signal, a transmitter configured to transmit a transmit signal to the antenna by way of the antenna-plexer, a receiver configured to process a receive signal, and a feedback receiver configured to process the feedback signal from the antenna-plexer to provide compensation to the receive signal.

Antenna-plexer for interference cancellation

RF communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, an RF communication system includes a transmitter that transmits a transmit signal through a first front end circuit, a receiver that processes a receive signal from a second front end circuit, and a feedback receiver that processes a feedback signal from the first front end circuit to generate a digital interference cancellation signal that compensates the receiver for interference arising from the transmitter.

Examples provide a spur reduction circuit and a spur reduction apparatus, a radio transceiver, a mobile terminal, a method and a computer program for spur reduction. The spur reduction circuit () is configured to reduce spur interference in a baseband radio signal, d(n), n indexing samples and comprises at least one input () for the baseband radio signal, d(n), and information on at least one spur frequency, &#x3c9;(n). The spur reduction circuit further comprises an adaptive filter () configured to filter the baseband radio signal, d(n), to obtain a baseband radio signal with reduced spur interference, e(n). The adaptive filter () is further configured to filter the baseband radio signal, d(n), based on at least one filter coefficient, w(n), and based on the information on the at least one spur frequency, &#x3c9;(n). The spur reduction circuit () further comprises an update module () configured to adapt the at least one filter coefficient, w(n), based on the baseband radio signal with reduced spur interference e(n). The spur reduction circuit () further comprises at least one output () for the baseband signal with reduced spur interference e(n).

Spur reduction circuit and apparatus, radio transceiver, mobile terminal, method and computer program for spur reduction

A communication device is described comprising a first transceiver chain set to communicate signals in a first frequency range, a second transceiver chain set to communicate signals in a second frequency range or set to no communication and a controller, configured to receive an instruction for a resetting of carrier aggregation comprising a setting of the first transceiver chain or the second transceiver chain to receive signals in a third frequency range different from the first frequency range and the second frequency range, to control, in response of the reception of the instruction, the second transceiver chain to receive signals within the first frequency range simultaneously with the first transceiver chain and to control the first transceiver chain, when the communication of signals within the first frequency range by the second transceiver chain fulfills a predetermined criterion, to stop communication of signals within the first frequency range.

Communication device and method for controlling transceiver chains of a communication device

A phase locked loop includes a feedforward path receiving a reference signal having a reference frequency and outputting an output signal having an output frequency that is a function of the reference signal and a feedback signal. The phase locked loop further includes a feedback path having a divider circuit associated therewith that is configured to receive the output signal and generate the feedback signal having a reduced frequency based on a divide value of the divider circuit. The feedback signal is supplied to the feedforward path. The phase locked loop also includes a modulator circuit configured to receive modulation data and provide a divider control signal to the divider circuit to control the divide value thereof, and a phase tracker circuit configured to determine an amount of phase drift from an initial phase value of the output signal due to an interruption in a locked state of the phase locked loop.

Phase tracker for a phase locked loop

A method of processing signals may include receiving a first signal being modulated on a first carrier frequency in a predefined frequency band; measuring a signal level of a received second signal at a frequency higher than the first carrier frequency; and measuring a signal level of a received third signal at a frequency being lower than the first carrier frequency. The method may further include selecting an intermediate mixing carrier frequency from a plurality of intermediate mixing carrier frequencies for processing at least a portion of the received first signal based on the signal level of the second signal and the signal level of the third signal. The method may additionally include performing intermediate frequency reception of at least a portion of the received first signal using the selected intermediate mixing carrier frequency.

Method of processing received digitized signals and mobile radio communication terminal device

A communication system having self or internal calibration is disclosed. The system includes an antenna tuner, a mismatch component, a receiver, and a strength indicator. The antenna tuner is configured to mismatch an antenna according to a mismatch code. The mismatch code includes or alters antenna characteristics of the antenna. The mismatch component is configured to provide the mismatch code to the antenna tuner. The strength indicator is configured to measure a strength of the received signal.

Systems and methods for enhancing probability of internal measurements in crowded environments

The disclosure relates to a receiver system that employs multiple instances of a DC compensation system to reduce DC offsets in a receiver path. The receiver has a receiver front end configured to receive an RF input signal and to operate on the RF input signal according to a plurality of receiver states to generate a baseband signal having a DC offset that is based upon the plurality of receiver states. A DC offset compensation circuit implements a plurality of instances of DC offset compensation components that respectively generate an estimated DC offset corresponding to a receiver state. A controller controls the receiver state of the receiver front end and operates the DC offset elimination circuit to selectively apply one of the plurality of DC compensation components to the corresponding baseband signal based upon the receiver state.

Receiver with enhanced DC compensation

According to an embodiments, a device may be provided. The device may include a data receiver configured to receive data in sets of consecutive packets from a data transmitter, wherein each set may include a first packet and at least one further packet. The device may further include a first packet reception determinator configured to determine whether the first packet of a set of consecutive packets is received by the data receiver. The device may further include a data sending determinator configured to determine whether the data transmitter sends the set of consecutive packets based on whether the first packet of the set of consecutive packets is received.

Data receiving devices and methods for receiving data

A radio-frequency IC () for a mobile radio transmitter () has an analogue/digital converter unit () for digitizing baseband signals (AB), a recovery unit () for recovering determined data information (Rot, TxSymbPhase) on which the baseband signals (AB) are based, a digital/analogue converter unit () and a frequency converter unit for producing transmitted signals on the basis of the signals produced by the digital/analogue converter unit ().

Radio-frequency IC for a mobile radio transmitter

Embodiments of an apparatus for sample rate conversion are described. Various embodiments include an interpolator configured to interpolate a digital input data stream by using values of an interpolation phase shift control quantity to generate a digital output data stream, a computing stage configured to compute values of the interpolation phase shift control quantity, and an enabling/disabling stage configured to selectively disable the interpolator while keeping the computing stage enabled.

Digital sample rate conversion

A signal processing device is provided that includes a modulation unit that produces an amplitude element as well as a phase element from components that are applied thereto. A correction device is also provided, in which at least one of the components is supplied and is compared with an ideal nominal value. This is used to produce a correction factor, which is multiplied by the component which has been compared with the nominal value. The correction factor determined is used to correct any offset or distortion of the components produced by analog circuits.

Growing community of inventors

Munich, Germany

Thorsten Tracht