Nxp B.v.

Johannes Bruckbauer

Gernot Hueber

Ian Thomas Macnamara

Hubert Watzinger

Erich Merlin

Harald Witschnig

Ulrich Neffe

Michael Stark

Elisabeth Sonnleitner

Thomas Noisternig

Embodiments of methods and systems for operating a communications device are described. In an embodiment, a method for operating a communications device that communicates via inductive coupling involves adjusting a phase configuration of the communications device in response to at least one system or environmental parameter, modulating a carrier signal with the adjusted phase configuration using active load modulation (ALM), and transmitting the modulated carrier signal from the communications device for inductive coupling.

Method and system for operating a communications device that communicates via inductive coupling

Embodiments of methods and systems for operating a communications device that communicates via inductive coupling are described. In an embodiment, a method for operating a communications device that communicates via inductive coupling involves adjusting a configuration of the communications device in response to a clock signal that is synchronized to a received clock signal, obtaining information that corresponds to transmission current or power generated in response to the adjusted configuration, and quantifying a detuning condition in response to the obtained information. Other embodiments are also described.

Embodiments of methods and systems for operating a communications device are described. In one embodiment, a method for operating a communications device that communicates via inductive coupling involves adjusting a phase configuration of the communications device in response to at least one system or environmental parameter, modulating a carrier signal with the adjusted phase configuration using active load modulation (ALM), and transmitting the modulated carrier signal from the communications device for inductive coupling. In some embodiments, the at least one system or environmental parameter is selected from one or more of the following: a distance information, a geometric information, a system code, a technology code, a transmitter current and/or a transmitter power, a detuning condition, a quality factor and a resonant frequency of a resonant system.

System to calibrate phase using system information

Embodiments of methods and systems for operating a communications device that communicates via inductive coupling are described. In an embodiment, a method for operating a communications device that communicates via inductive coupling involves obtaining transmission output power information related to the communications device and measuring a detuning condition based on the transmission output power information. Other embodiments are also described.

A method for operating an RFID device is disclosed. In the embodiment, the method involves establishing a radio-frequency link, receiving signal samples of the radio-frequency link, determining the offset of an initial phase of the link by filtering noise from the signal samples, windowing the filtered signal samples, and calculating an offset value from phase differences between the windows of signal samples, and modifying a configuration profile based on the offset value. During data transmission the configuration profile can be used to configure the transmitter in order to maintain the constant phase during transmission.

Method and device for phase calibration with active load modulation

The present invention provides for a method and system for compensating phase offset caused by a matching network and antenna of a communications device. The method comprises: generating a mapping that correlates phase offset with a characteristic parameter; measuring the characteristic parameter for the communications device; using the measured characteristic parameter and the mapping to determine a phase offset for the communications device; and using the determined phase offset to compensate for the phase offset caused by the matching network and antenna of the communications device. The present invention also provides for a method and system for measuring a phase offset caused by a matching network and antenna of a communications device.

Method and system to measure the phase offset based on the frequency response in a NFC system

A method for coded data transmission between a base station () and at least one transponder () within a wireless data transmission system (), the method comprising the steps of: &#x2014;providing a set of symbols (S. . . S) for encoding data (DD), wherein the set of symbols (S. . . S) is divided into at least two sub-sets (SS, SS), and wherein each symbol (S. . . S) of the complete set is assigned to one of said at least two sub-sets (SS, SS); &#x2014;encoding said data (DD) using symbols (S. . . S) of said at least two sub-sets (SS, SS), wherein at least one encoded symbol (S. . . S) comprises several bits; &#x2014;transmitting each encoded symbol (S. . . S) within a symbol duration (SD) of an encoded data signal (DS) between said base station () and at least one transponder (), wherein the sub-set (SS, SS) assigned to each encoded symbol (S. . . S) is indicated by a value of at least one bit (LB) of each encoded symbol (S. . . S); &#x2014;identifying the value of said at least one bit (LB) of the transmitted encoded symbols within the encoded data signal (DS); &#x2014;determining the sub-set (SS, SS) assigned to each encoded symbol (S. . . S) depending on the identified value of said at least one bit (LB); and &#x2014;decoding each encoded symbol (S. . . S) according to the determined sub-set (SS, SS).

Method for coded data transmission between a base station and at least one transponder within a wireless data transmission system

A demodulator () for demodulating a modulated signal () comprises a Hubert transformer () for generating a Hubert transformed modulated signal () of the modulated signal (). The Hubert transformed modulated signal () comprises modulated () and unmodulated signal sequences () and originates from an unmodulated signal. The demodulator () further comprises a comparing device () for comparing the Hubert transformed modulated signal () with a reference signal (), which corresponds to the Hubert transformed unmodulated signal. The demodulator () is further configured to identify the modulated and unmodulated signal sequences () based on the comparison.

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Treubach, Austria

Johannes Bruckbauer