Intel Mobile Communications Gmbh

Intel Corporation

Infineon Technologies Ag

Intel Deutschland Gmbh

Rainer Dirk Kreienkamp

Markus Hammes

Christoph Schultz

Jens Kissing

Junlin Yan

Harald Doppke

Thorsten Clevorn

Giuseppe Li Puma

Thomas Mayer

Tobias Scholand

Jan K Ellenbeck

Stefan Van Waasen

Lijun Zhang

Narayan Vishwanathan

Christian Duerdodt

Chandra Gupta

Markus Schlamann

Romeo Lopez Soto

Matthias Malkowski

Stefan Kaehlert

A method for controlling a bandwidth used for processing a baseband transmit signal by a transmit path of a transmitter is provided. The method includes generating a first comparison result by comparing, to a threshold value, a first number of physical resource blocks allocated to the transmitter for a first transmission time interval. Further, the method includes generating a second comparison result by comparing, to the threshold value, a second number of physical resource blocks allocated to the transmitter for a subsequent second transmission time interval. The method additionally includes adjusting the bandwidth based on the first and the second comparison results.

Methods and apparatuses for controlling a bandwidth used for processing a baseband transmit signal, receiver for a wireless communication system, and method for a receiver

A method for determining an image rejection characteristic of a receiver within a transceiver is provided. The transceiver uses a common local oscillator. The method includes generating a test signal having a spectral peak and generating a local oscillator signal comprising a frequency with an offset from a center frequency of the spectral peak. Further, the method includes down-mixing the test signal in the receiver using the local oscillator signal to generate a down-mixed signal. The method further includes calculating a first value of a signal characteristic of the down-mixed signal in a first frequency range corresponding to a desired signal component of the down-mixed signal and calculating a second value of the signal characteristic of the down-mixed signal in a second frequency range corresponding to an undesired signal component of the down-mixed signal. Further, the method includes comparing the first value and the second value to generate the image rejection characteristic.

System and a method for determining an image rejection characteristic of a receiver within a transceiver

Representative implementations of devices and techniques provide a built-in self-test for a RF communication device. The communication device self-generates a test signal and processes the test signal through the communication device to determine an operational state of the communication device.

Built-in self-test for receiver

A mixer is configured to sample a received input signal at a predefined oscillator frequency to generate a sampled input signal, and to switch a polarity of the sampled input signal at a predefined polarity switching frequency to generate a polarity switched sampled input signal.

Mixer, mixer system and method

One embodiment of the present invention relates to a combined mixer filter circuit. The circuit includes a sampler, a plurality of filter branches, and a coefficient generator. The sampler is configured to provide a sampled signal by sampling a received signal at a specified rate. The plurality of filter branches has selectable filter coefficients. The plurality of filter branches are configured to receive the sampled signal and generate a mixed and filtered output signal without a separate mixer component. The coefficient generator is coupled to the plurality of filter branches. The coefficient generator is configured to assign filter coefficient values to the selectable filter coefficients to yield a selected mixing function for the mixed filtered output signal.

Sampling receiver with inherent mixer functionality

This disclosure relates to radio frequency (RF) functional testing of transceivers of wireless devices.

Integrated transceiver loop back self test by amplitude modulation

Disclosed herein are techniques, systems, and methods relating to compensation of phase disturbances of a phase lock-loop during power ramp up or down of a power amplifier. More specifically, a phase lock-loop is described that is able to switch between type I and type II PLL modes depending on the power state of the power amplifier without introducing additional disturbances.

Compensation of phase lock loop (PLL) phase distribution caused by power amplifier ramping

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Duesseldorf, Germany

Rainer Dirk Kreienkamp