Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may include a memory and at least one processor coupled to the memory. The at least one processor may be configured to determine a retransmission rate associated with retransmission of one or more packets by the communications device. The at least one processor may be configured to determine a measurement associated with antenna gain of at least one antenna of the apparatus. The at least one processor may be configured to adjust a transmission power of the apparatus based on the retransmission rate and based on the measurement.

Abstract: A wireless communication device is described. The wireless communication device includes a processor, a memory in communication with the processor and instructions stored in the memory. The instructions are executable by the processor to detect a signal degradation indication for a radio frequency (RF) signal. The instructions are also executable by the processor to cause a switch to select a combination of a first matching network and a second matching network coupled to an antenna in response to detecting the signal degradation indication.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may include a memory and at least one processor coupled to the memory. The at least one processor may be configured to determine a retransmission rate associated with retransmission of one or more packets by the communications device. The at least one processor may be configured to determine a measurement associated with antenna gain of at least one antenna of the apparatus. The at least one processor may be configured to adjust a transmission power of the apparatus based on the retransmission rate and based on the measurement.

Abstract: A wireless communication device is described. The wireless communication device includes a processor, a memory in communication with the processor and instructions stored in the memory. The instructions are executable by the processor to detect a signal degradation indication for a radio frequency (RF) signal. The instructions are also executable by the processor to cause a switch to select a combination of a first matching network and a second matching network coupled to an antenna in response to detecting the signal degradation indication.

Abstract: Exemplary systems, apparatus, and methods described herein may improve a scan process for near field communications, such as IEEE 802.15.4. The improvements may include, during the scan process, performing one of increasing a current of a voltage controlled oscillator (VCO)/digitally controlled oscillator (DCO) of a second wireless device, reducing a bandwidth of a phased locked loop, increasing the bandwidth of the phased locked loop, changing a reference frequency of the phased locked loop, or dithering the reference frequency.

Abstract: A wireless communication device is described. The wireless communication device includes a transmit/receive (T/R) switch that is configured with an antenna port coupled to an antenna, a transmitter port coupled to a transmitter and a receiver port coupled to a receiver. The T/R switch selectively connects the transmitter port to the antenna port or the receiver port to the antenna port. The wireless communication device also includes a T/R switch controller that sets the T/R switch to disconnect the transmitter from the antenna when the transmitter is actively transmitting in a high insertion loss mode to reduce power from the transmitter to the antenna.

Abstract: Various aspects for motion detection and/or gesture recognition in a wireless communication device are disclosed, and may include determining whether a source address of a received data packet is a source address of the wireless device, determining whether a process for the motion detection and/or gesture recognition is enabled in the wireless device and processing one or more received signals for the motion detection and gesture recognition occurring in a proximity of the wireless device. The one or more received signals are transmitted from a transmit antenna of the wireless device and received via a receive antenna of the wireless device. The received data packet is carried by at least one of the one or more received signals. The received data packet may be a Bluetooth data packet carrying the source address.

Abstract: Various aspects for motion detection and/or gesture recognition in a wireless communication device are disclosed, and may include a transmit/receive radio frequency switch including a control input for controlling radio frequency signal routing of the switch from a radio frequency transmit port of the wireless device to an antenna and from the antenna to a radio frequency receive port of the wireless device, a first radio frequency coupler for coupling to the transmit port of the wireless device and for passing of transmit signals from the transmit port to the antenna through the switch, a second radio frequency coupler for coupling to the receive port of the wireless device and for passing of receive signals from the antenna to the receive port through the switch, and a connector for connecting a transmit isolation port of the first coupler to a receive isolation port of the second coupler.

Abstract: A wireless communication device is described. The wireless communication device includes a transmit/receive (T/R) switch that is configured with an antenna port coupled to an antenna, a transmitter port coupled to a transmitter and a receiver port coupled to a receiver. The T/R switch selectively connects the transmitter port to the antenna port or the receiver port to the antenna port. The wireless communication device also includes a T/R switch controller that sets the T/R switch to disconnect the transmitter from the antenna when the transmitter is actively transmitting in a high insertion loss mode to reduce power from the transmitter to the antenna.

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 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.

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: An example phase-locked loop (PLL) includes a digital filter, an oscillator, and a time-to-digital converter (TDC). The digital filter is configured to sample at a discrete time that is responsive to a reference clock signal received at the digital filter. The oscillator is coupled to the digital filter and configured to generate an output signal of the PLL. The TDC is coupled to the oscillator to determine a phase difference between the output signal and the reference clock signal. The TDC also provides a time signal to the digital filter that is based on the phase difference and is representative of an instantaneous rate of operation of the PLL. The digital filter is further configured to adjust a response characteristic of the digital filter according to the time signal.

Abstract: Systems and methods are disclosed that may detect a likely presence of a narrow band signal in the presence of wide-band interference without powering up a wireless receiver. A wireless device may receive a wireless signal, measure a first energy level in a first frequency band associated with an expected frequency band of the narrow band wireless signal, measure a second energy level in a second frequency band that is offset from and non-overlapping with the first frequency band, and determine whether a difference between the first energy level and the second energy level exceeds a threshold. A wireless receiver of the wireless device may be powered up based at least in part on the difference between the first energy level and the second energy level exceeding the threshold.

Abstract: An apparatus for wirelessly transmitting charging power is provided. The apparatus comprises a transmit coil configured to generate a wireless charging field for wirelessly transmitting charging power when driven by a current. The apparatus comprises a control circuit configured to cause the transmit coil to transmit a packet via the wireless charging field, wherein the packet comprises information indicative of the presence of the wireless charging field to cause a chargeable device to electrically disconnect a communication circuit from a receive coil within the chargeable device. The control circuit is further configured to cause the transmit coil to transmit the packet periodically based on a predetermined interval. The predetermined interval has a shorter duration than a duration of a communication interval of the communication circuit. The control circuit is further configured to reduce a magnitude of a strength of the wireless charging field during packet transmission.

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: Systems and methods are disclosed that may detect a likely presence of a narrow band signal in the presence of wide-band interference without powering up a wireless receiver. A wireless device may receive a wireless signal, measure a first energy level in a first frequency band associated with an expected frequency band of the narrow band wireless signal, measure a second energy level in a second frequency band that is offset from and non-overlapping with the first frequency band, and determine whether a difference between the first energy level and the second energy level exceeds a threshold. A wireless receiver of the wireless device may be powered up based at least in part on the difference between the first energy level and the second energy level exceeding the threshold.

Abstract: Disclosed are methods and apparatuses for reducing fractional spurs in an All-Digital Phase Lock Loop (ADPLL). An exemplary apparatus includes a crystal oscillator configured to generate a first frequency reference signal, a non-integer divider coupled to the crystal oscillator and configured to divide the first frequency reference signal by a non-integer variable to generate a second frequency reference signal, and a multiplexor coupled to the non-integer divider and the crystal oscillator and configured to output the first frequency reference signal or the second frequency reference signal to the ADPLL, wherein the multiplexor is configured to output the second frequency reference signal based on the ADPLL being tuned to a low fractionality channel.

Abstract: In one aspect, an apparatus for wirelessly coupling with other devices is provided. The apparatus includes a metallic cover having a removed portion. The apparatus comprises a first coil substantially wound around the removed portion of the metallic cover and configured to communicate with at least one other device via a communications protocol. The metallic cover comprises a second coil substantially wound around the removed portion of the metallic cover and configured to wirelessly and inductively receive charging power sufficient to charge or power the apparatus from at least one wireless charging power transmitter.

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.