Patent ID: 9042814
Filing Date: 2015-05-26
Classification: H04B,H04W

Abstract:
1. A method of operating an NFC-enabled device, comprising: detecting, by a field detector circuit of the NFC-enabled device, an NFC reader field based on a current induced within an antenna of the NFC-enabled device; waking, in response to detecting the NFC reader field by the field detector circuit, a powered-down receiver circuit of the NFC-enabled device; generating by the receiver circuit, after waking the powered-down receiver circuit, in-phase (I) and quadrature (Q) components of an incoming signal received from the NFC reader field; determining a strength of the incoming signal received from the NFC reader field based on the I and Q components generated by the receiver circuit; generating, at the NFC-enabled device, information representative of the determined strength at a first time; and generating a first user perceivable output representative of the determined signal strength, the first user perceivable output configured to direct a user to spatially orient the NFC-enabled device to improve the strength of the signal received.