Method and system for high resolution tuning of the phase for active load modulation in a NFC system
AssigneeNXP B.V.
InventorsGernot Hueber, Ian Thomas Macnamara
Life of this patent
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Abstract
High resolution tuning of the phase for active load modulation (ALM) in a near field communication (NFC) system is desirable for optimizing the load modulation amplitude. The present disclosure describes that, in one embodiment, high resolution tuning of the phase can be achieved by adjusting the attenuation factor of a radio frequency (RF) attenuator in the NFC system.
Claims20
A method for enhancing phase tuning resolution of a communications device that communicates via inductive coupling, the method comprising:
- 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,
- wherein adjusting the phase configuration of the communications device comprises adjusting an attenuation factor of a radio frequency (RF) attenuator of the communications device.
A system for enhancing phase tuning resolution of a communications device that communicates via inductive coupling, the system comprising:
- a phase configuration adjustment module configured to adjust a phase configuration of the communications device in response to at least one system or environmental parameter;
- a signal modulation module configured to modulate a carrier signal with the adjusted phase configuration using active load modulation (ALM);
- a signal transmission module configured to transmit the modulated carrier signal from the communications device for inductive coupling;
- and
- a radio frequency (RF) attenuator configured to attenuate input signal to an analog receiver by an attenuation factor,
- wherein the phase configuration adjustment module is further configured to adjust the attenuation factor of the radio frequency (RF) attenuator.
A computer program product embodied in a non-transitory computer readable medium, when executed by a computer, to enhance phase tuning resolution of a communications device that communicates via inductive coupling, the computer program product comprising:
- computer code for adjusting a phase configuration of the communications device in response to at least one system or environmental parameter;
- computer code for modulating a carrier signal with the adjusted phase configuration using active load modulation (ALM);
- and
- computer code for transmitting the modulated carrier signal from the communications device for inductive coupling,
- wherein adjusting the phase configuration of the communications device comprises adjusting an attenuation factor of a radio frequency (RF) attenuator of the communications device.
Dependencies are inferred from the claim text.