Abstract: A method for wireless communication by a wireless communication device is described. The method includes receiving geographic location information. The method also includes querying a geographic location tuning database for tuning parameter values corresponding with the geographic location information. The method further includes determining one or more tuning parameters to change based on the tuning parameter values. The method additionally includes adjusting an antenna for inductively coupled communication with a reader device according to the determined tuning parameters.

Abstract: A method for performing near-field communication (NFC)-type operations in the far-field region using a repurposed antenna is described. The method includes determining whether to perform NFC-type operations in a near-field mode or a far-field mode. The method further includes performing NFC-type operations outside a near-field region using a repurposed antenna when in the far-field mode.

Abstract: A method for communications is described. The method includes determining a symbol timing drift elimination amount for a received signal. The method further includes eliminating part of the symbol timing drift by adjusting a reference clock for the modem. Determining the symbol timing drift elimination amount may be based on at least one of a symbol timing drift estimate, a symbol timing error, a packet acquisition indicator, a packet validity indicator, demodulated bits or a carrier presence indicator.

Abstract: Various aspects are described herein in connection with methods and/or apparatuses of near-field communication. For example, various methods and apparatuses include an NFC transmitter configured to send a communication establishment (CES) command. The CES command includes at least one transmitter communication enhancement (TX CEN) parameter comprising an operation setting based on a geographic location of the NFC transmitter. The NFC transmitter is configured to determine whether a CES response was received from an NFC receiver and adjust a communications channel based on at least one receiver (RX) CEN parameter included in the CES response based on the at least one TX CEN parameter. Various methods and apparatuses also include a NFC receiver configured to receive a CES command from an NFC transmitter and send a CES response. The CES response includes at least one RX CEN parameter comprising an operation setting based on a geographic location of the NFC receiver.

Abstract: A method for inductively coupled communication is described. The method includes applying a carrier signal at a carrier frequency to an antenna circuit. The antenna circuit includes an antenna and a matching network that resonate at a resonant frequency. The method also includes measuring a looped-back signal over a range of impedance values. The looped-back signal includes the carrier signal received by a receiver coupled to the antenna circuit. The method further includes setting a calibrated impedance as an impedance configuration that produces a resonance peak in the looped-back signal.

Abstract: Aspects disclosed herein relate to mitigating an antenna over-coupling condition in near field communication (NFC) devices. A transmission signal for a transmitted carrier is generated at a transmit circuit of an initiator NFC device, and a received carrier is received at a receive circuit of the initiator NFC device. The initiator NFC device can detect an antenna over-coupling condition related to antenna coupling with a remote NFC device based at least in part on the transmission signal and the received carrier.

Abstract: A method for reducing transmission interference is described. The method may be performed by a wireless communication device. The method includes determining that a tuned FM frequency of an FM receiver is within a threshold of a harmonic of an inductive communication transmission produced by an inductive communication transceiver. A magnetic field of the inductive communication transceiver is inductively coupled with the FM receiver. The method also includes canceling the harmonic of the inductive communication transmission by energizing a parasitic loop with the magnetic field.

Abstract: A method for reducing transmission interference is described. The method includes determining that an FM receiver is turned on. The method also includes determining that the FM receiver is tuned to an FM channel experiencing interference from an induction-based communication transmitter. The method further includes adjusting a transmit frequency of the induction-based communication transmitter by a temporary frequency shift.