Abstract: An apparatus can include an antenna, transmitter circuitry coupled to the antenna, and processing circuitry coupled to the transmitter circuitry. The processing circuitry can measure a first reflection coefficient of the antenna in free space and a second reflection coefficient of the antenna when the antenna is proximate biological tissues. The processing circuitry can determine a contextual property of the biological tissues based on a comparison between the first coefficient and the reflection coefficient proximate biological tissues.

Abstract: A combined antenna circuitry including a multi-feed antenna including a first antenna feed, a second antenna feed, and a third antenna feed; wherein the first antenna feed is configured to be connected to a first antenna of the combined antenna circuitry and is configured to operate on a first frequency band of a first radio access technology (RAT); wherein the second antenna feed is configured to be connected to a second antenna of the combined antenna circuitry and is configured to operate on a second frequency band of the first RAT; and wherein the third antenna feed is configured to be connected to the second antenna of the combined antenna circuitry and is configured to operate on a frequency band of a second RAT, wherein the frequency band of the second RAT does not correspond to any frequencies of the second frequency band of the first RAT.

Abstract: For example, an apparatus may include a Body Proximity Sensor (BPS) configured to detect proximity of a wireless communication device to a human body based on wireless communication signals communicated by the wireless communication device. For example, the BPS may include an input to receive loopback information of a Receive (Rx) loopback signal, the Rx loopback signal including a wireless Rx signal received by a receiver of the wireless communication device based on a loopback of a wireless transmit (Tx) signal transmitted by a transmitter of the wireless communication device; and a processor configured to determine a detection result based on the loopback information, the detection result to indicate a detected proximity of the wireless communication device to the human body.

Abstract: This disclosure presents methods and devices that implement dynamic transmit power control techniques in terminal devices with multiple radio frequency (RF) transmitters and/or in a multi-terminal device environment to comply with regulatory RF exposure limits and standards while enhancing device performance. For example, the present disclosure provides a device including a processor configured to monitor a transmit power for each of a plurality of transmitters; determine a transmit power reduction to be applied to the plurality of transmitters based on a total simultaneous transmit power of the plurality of transmitters exceeding a threshold; define a respective amount of the transmit power reduction to be applied to each transmitter of the plurality of transmitters based on one or more parameters; and apply the respective amount of the transmit power reduction to each transmitter of the plurality of transmitters.

Abstract: This disclosure describes systems, methods, and devices related to enhanced power management. A device may identify one or more first radio frequency waves received from a second device during a time period. The device may determine a first transmission power associated with a first radio frequency wave of the one or more first radio frequency waves. The device may determine a time-averaged power density associated with the one or more first radio frequency waves. The device may determine a transmission power limit. The device may send an indication of the transmission power limit to the second device.

Abstract: Methods and device to implement the use of proximity sensor data and time-averaging specific absorption rate methods in determining whether to apply or remove a power back-off to a radio frequency transmitter. The methods and devices may be configured to detect whether a body is proximately located based on obtained proximity sensor data; define an upper threshold for a radio frequency (RF) transmit power and a lower threshold for the RF transmit power; calculate an average power of an RF transmitter over a fixed time period; and based on whether the body is detected, the average power, and a comparison of the average power to the upper threshold or the lower threshold, determine whether to apply or remove a power back-off to the RF transmitter.

Abstract: This disclosure describes systems, methods, and devices related to enhanced power management. A device may identify one or more first radio frequency waves received from a second device during a time period. The device may determine a first transmission power associated with a first radio frequency wave of the one or more first radio frequency waves. The device may determine a time-averaged power density associated with the one or more first radio frequency waves. The device may determine a transmission power limit. The device may send an indication of the transmission power limit to the second device.

Abstract: A wireless communication device includes one or more processors, configured to determine one or more first transmission power measurements within a first transmission power measurement sampling period; calculate a first transmission power factor, the first transmission power factor representing a central tendency of the one or more first transmission power measurements from the first power measurement sampling period; determine a second power measurement during a second transmission power measurement sampling period; and calculate a second transmission power factor, wherein the second transmission power factor is a central tendency of at least one of the one or more first power measurements and the second power measurement.

Abstract: This disclosure describes systems, methods, and devices related to enhanced power management. A device may identify one or more first radio frequency waves received from a second device during a time period. The device may determine a first transmission power associated with a first radio frequency wave of the one or more first radio frequency waves. The device may determine a time-averaged power density associated with the one or more first radio frequency waves. The device may determine a transmission power limit. The device may send an indication of the transmission power limit to the second device.

Abstract: Systems and methods for determining similarity between two or more audio pieces are disclosed. An illustrative method for determining musical similarities includes extracting one or more descriptors from each audio piece, generating a vector for each of the audio pieces, extracting one or more audio features from each of the audio pieces, calculating values for each audio feature, calculating a distance between a vector containing the normalized values and the vectors containing the audio pieces, and outputting a response to a user or process indicating the similarity between the audio pieces. The descriptors can be used in performing content-based audio classification and for determining similarities between music. The descriptors that can be extracted from each audio piece can include tonal descriptors, dissonance descriptors, rhythm descriptors, and spatial descriptors.