Patent ID: 9450646
Filing Date: 2016-09-20
CPC Classification: G06K,H04B

Claim Text:
1. A method of operating a near-field communication (NFC) device as a target device during an NFC session, the method comprising: receiving a polling command from an initiator device requesting a passive communication mode for the NFC session; receiving a first carrier signal from the initiator device during the NFC session, the first carrier signal remaining un-modulated after the polling command is received; transmitting a second carrier signal from the target device to the initiator device while the first carrier signal is being received by the target device and remains un-modulated; and modulating data onto the second carrier signal, the first carrier signal and the second carrier signal combining to form a composite waveform indicative of the modulated data, wherein the composite waveform is a super-position of the first carrier signal and the second carrier signal.