Abstract: Systems and methods for estimating a position of a receiver within a venue using localized networks of beacons. Certain aspects relate to different configurations of networks. Other aspects relate to estimating the position of the receiver when the receiver approaches an edge of a localized network of beacons.

Abstract: Methods and systems for recognition of pickup and glance gestures for a mobile device are provided. An example method includes acquiring sensor data generated by at least one sensor of a mobile device. Based on the sensor data, a particular transport mode associated with a motion of the mobile device may be determined. Based on the particular transport mode, a corresponding on/off body detector designed for the particular transport mode may be selected. The selected on/off body detector can be used to determine if the mobile device is located on or off a user's body. The example method includes, if the mobile device is determined to be on the user's body, analyzing the sensor data to detect a glance gesture. The example method also includes, if the mobile device is determined to be off the user's body, analyzing the sensor data to detect a pickup gesture.

Abstract: Estimating the position of a receiver using positioning signals and Doppler frequency measurements. Approaches for estimating the position of a receiver using positioning signals and Doppler frequency shift measurements determine an initial estimate of a receiver's position using ranging signals from a first system, generate Doppler frequency shift measurements using the Doppler positioning signals from a second system, and refine the initial estimate using the Doppler frequency shift measurements.

Abstract: Systems and methods for estimating a position of a receiver within a venue using localized networks of beacons. Certain aspects relate to different configurations of networks. Other aspects relate to estimating the position of the receiver when the receiver approaches an edge of a localized network of beacons.

Abstract: Estimating a two-dimensional position of a receiver based on an altitude of an object other than the receiver in a geographical region within which the receiver is believed to reside. In one embodiment, when a high-accuracy estimate of the receiver's altitude is available, latitude and longitude coordinates of the receiver are estimated using the high-accuracy estimate of the receiver's altitude. When the high-accuracy estimate of the receiver's altitude is not available, the latitude and longitude coordinates of the receiver are estimated using an alternative altitude value that is based on one or more altitudes of one or more things other than the receiver.

Abstract: Described are systems and methods for estimating a position of a receiver within a venue using localized networks of beacons. Certain aspects relate to different configurations of the networks. Other aspects relate to estimating the position of the receiver when the receiver approaches an edge of a localized network of beacon.

Abstract: Systems and methods for estimating whether a receiver is indoors or outdoors. Certain approaches evaluate data associated with a network of beacons to determine whether the receiver is indoors or outdoors. Such evaluation may include any of determining whether azimuthal angles corresponding to the beacons meet an azimuthal angle condition, determining whether elevation angles corresponding to the beacons meet an elevation angle condition, determining whether signal strengths corresponding to the beacons meet a signal strength condition, and determining whether other measurements associated with the beacons meet other measurement conditions.

Abstract: Systems, methods, and other embodiments associated with adaptively determining settings of a transmit equalizer are described. According to one embodiment, a method includes removing, from a signal received from a first device, a signal contribution of a transmit equalizer to produce a residual signal. The method includes generating revised tap coefficients based, at least in part, on the residual signal. The method includes providing settings that are based, at least in part, on the revised tap coefficients to the transmit equalizer in the transmitter of a second device that is across a channel on which the signal is provided.

Abstract: A method and apparatus for receiving data in high-speed applications wherein an analog-to-digital converter (ADC) samples a received signal and a data decoder implemented with a tree search algorithm detects the bits of the sampled data for timing recovery. In some embodiments, a Viterbi detector is implemented to provide accurate bit detection for data output while tree search detected data is used to determine the optimal sampling phase for the ADC. In some embodiments, after the phase acquisition stage of timing recovery has completed, the tree search decoder may decrease the rate of data detection to maintain phase tracking.

Abstract: Systems, methods, and other embodiments associated with echo cancellation are described. According to one embodiment, a method includes generating, in a communication device, an address to a look-up table by using a first signal and a second signal. The look-up table is a two-dimensional look-up table configured to store a plurality of cancellation values arranged in a two-dimensional grid. The method also includes producing, in the communication device, a cancellation signal according to a cancellation value in the look-up table that corresponds to the address.

Abstract: Described are systems and methods for estimating a position of a receiver within a venue using localized networks of beacons. Certain aspects relate to different configurations of the networks. Other aspects relate to estimating the position of the receiver when the receiver approaches an edge of a localized network of beacon.

Abstract: Devices, systems, and methods for improving performance in positioning systems are disclosed. Signal processing methods to determine a first time of arrival signal, along with associated hardware and software apparatus for implementing such methods are described.

Abstract: Described are systems and methods relating to localized networks of beacons.

Abstract: Described are systems and methods for time synching.

Abstract: Devices, systems, and methods for improving performance in positioning systems are disclosed. Signal processing methods to determine a first time of arrival signal, along with associated hardware and software apparatus for implementing such methods are described.

Abstract: Described are systems and methods for time synching to a network in an environment that contains obstructions disposed between a receiver component and a transmitting device of the network. In particular, an adaptive masking approach and an outage approach may be used to maintain time synchronization to the network. The adaptive masking approach may be used to track satellites above predefined elevation angles that correspond to the obstructions. The outage approach may be used to maintain time synchronization when the transmitting device of the network is not in view of the receiver component.

Abstract: Apparatuses, methods, and other embodiments associated with adaptively determining equalizer setting for 10GBASE-KR transmitter are described. According to one embodiment, an apparatus for tuning an equalizer configured to undo the effects of a channel connecting a transmitter communicating to a receiver via a backplane includes a tuning logic configured to adaptively determine equalizer settings for the equalizer. The tuning logic includes a symmetric search logic configured to determine a desired boost setting for the equalizer, and an asymmetric search logic configured to determine a desired phase response for the equalizer.

Abstract: Systems, methods, and other embodiments associated with adaptively determining settings of a transmit equalizer are described. According to one embodiment, a signal is received from a transmitter and a signal contribution of the transmit equalizer is removed from the signal to produce a residual signal. Revised tap coefficients are computed based, at least in part, on the residual signal. Revised tap coefficient settings, that are based, at least in part, on the revised tap coefficients, are provided to the transmit equalizer.

Abstract: A method and apparatus for receiving data in high-speed applications wherein an analog-to-digital converter (ADC) samples a received signal and a data decoder implemented with a tree search algorithm detects the bits of the sampled data for timing recovery. In some embodiments, a Viterbi detector is implemented to provide accurate bit detection for data output while tree search detected data is used to determine the optimal sampling phase for the ADC. In some embodiments, after the phase acquisition stage of timing recovery has completed, the tree search decoder may decrease the rate of data detection to maintain phase tracking.

Abstract: In a method for detecting symbols in a signal received via a communication channel, the signal including a plurality of signal points, each signal point in the plurality of signal points is processed using a decision feedback equalizer (DFE) to produce a DFE decision. Reliability of the DFE decision is assessed to determine whether the DFE decision is at least one of i) reliable or ii) not reliable. When it is determined that the DFE decision is not reliable, a block of signal points of the plurality of signal points is processed using a Viterbi Detector (VD) to generate a block of VD decisions. The block of VD decisions is selected to be used in place of a block of DFE decisions.