Abstract: In accordance with a first aspect of the present disclosure, a near field communication (NFC) device is provided, comprising: a wake-up unit configured to: transmit one or more radio frequency, RF, pulses; detect a loading condition change occurring in response to transmitting the RF pulses; wake up one or more functional components of the NFC device if the loading condition change exceeds a predefined wake-up threshold; and a calibration state determination unit configured to determine a calibration state of the wake-up unit by detecting whether the loading condition change is within a predefined range below the wake-up threshold. In accordance with a second aspect of the present disclosure, a corresponding method of operating an NFC device is conceived.

Abstract: A near-field communication (NFC) device is configured to track the amplitude associated with a received radio frequency (RF) signal while transmitting a different RF signal indicating a command. To this end, the NFC device includes tracking circuitry configured to track the amplitude associated with the received RF signal based on a modulation state indicated by a modulation envelope associated with the transmitted RF signal. In response to the modulation envelope indicating a modulated state, the tracking circuitry enters an idle state and does not track the amplitude associated with the received RF signal. In response to the modulation envelope indicating an unmodulated state, tracking circuitry tracks the amplitude associated with the received RF signal.

Abstract: A reader of a communication system and method uses a synthesized control signal to cancel a beat frequency signal of an incoming signal, where the beat frequency signal is due to a magnetic coupling of the reader with another reader. The control signal is synthesized using at least one parameter of the beat frequency signal, which is estimated based on the incoming signal.

Abstract: In accordance with a first aspect of the present disclosure, a near field communication (NFC) device is provided, comprising: a receiver, said receiver including an analog-to-digital converter; a clipping detector configured to detect clipping of one or more signals processed by the analog-to-digital converter; and a sampling phase controller operatively coupled to the clipping detector, wherein said sampling phase controller is configured to adjust a sampling phase of the receiver based on an output of the clipping detector. In accordance with a second aspect of the present disclosure, a method of operating a near field communication (NFC) device is conceived.

Abstract: In accordance with a first aspect of the present disclosure, a communication device is provided, comprising: a front-end configured to receive an analog input signal, wherein the front-end comprises an analog-to-digital converter configured to convert the analog input signal into a digital signal; a digital signal processor configured to receive and process said digital signal; wherein the front-end further comprises a compressor operatively coupled to an input of the analog-to-digital converter, wherein said compressor is configured to apply a compressor function to the analog input signal before said analog input signal is provided to the analog-to-digital converter. In accordance with a second aspect of the present disclosure, a corresponding method of operating a communication device is conceived.

Abstract: A system includes a signal processing unit including an antenna configured to receive a radio frequency signal as a received radio frequency signal, and a baseband amplifier coupled to the antenna. The system includes a processor configured to cause the communication unit to stop generating a radio frequency polling signal, set an amplification gain of the baseband amplifier to a first gain value, periodically record, at a sample rate, an indication of a magnitude of the amplified radio frequency signal to generate a plurality of sample values, at a predetermined time interval after the communication unit stopped generating the radio frequency polling signal, set the amplification gain of the baseband amplifier to a second gain value, and transmit the plurality of sample values to a classifier module to determine whether the radio frequency signal is received from a near-field communication-enabled device.

Abstract: A near-field communication (NFC) device is configured to track the amplitude associated with a received radio frequency (RF) signal while transmitting a different RF signal indicating a command. To this end, the NFC device includes tracking circuitry configured to track the amplitude associated with the received RF signal based on a modulation state indicated by a modulation envelope associated with the transmitted RF signal. In response to the modulation envelope indicating a modulated state, the tracking circuitry enters an idle state and does not track the amplitude associated with the received RF signal. In response to the modulation envelope indicating an unmodulated state, tracking circuitry tracks the amplitude associated with the received RF signal.

Abstract: In accordance with a first aspect of the present disclosure, a communication device is provided, comprising: a front-end configured to receive an analog input signal, wherein the front-end comprises an analog-to-digital converter configured to convert the analog input signal into a digital signal; a digital signal processor configured to receive and process said digital signal; wherein the front-end further comprises a compressor operatively coupled to an input of the analog-to-digital converter, wherein said compressor is configured to apply a compressor function to the analog input signal before said analog input signal is provided to the analog-to-digital converter. In accordance with a second aspect of the present disclosure, a corresponding method of operating a communication device is conceived.

Abstract: A system includes a signal processing unit including an antenna configured to receive a radio frequency signal as a received radio frequency signal, and a baseband amplifier coupled to the antenna. The system includes a processor configured to cause the communication unit to stop generating a radio frequency polling signal, set an amplification gain of the baseband amplifier to a first gain value, periodically record, at a sample rate, an indication of a magnitude of the amplified radio frequency signal to generate a plurality of sample values, at a predetermined time interval after the communication unit stopped generating the radio frequency polling signal, set the amplification gain of the baseband amplifier to a second gain value, and transmit the plurality of sample values to a classifier module to determine whether the radio frequency signal is received from a near-field communication-enabled device.