Qualcomm Incorporated

Csr Technology Inc.

Benjamin Tarlow

Murray Robert Jarvis

Ian Charles Blair

Naveen Kumar Kakani

Erik David Lindskog

Raja Banerjea

Nicolas Graube

Hong Wan

William J Morrison

Paul Dominic Hiscock

Simon Finch

Clark Don Woolstenhulme

Marko Velic

Simon Gibbs

To determine a location of a client device in a wireless network having at least first and second network devices, with known locations, one of the network devices transmits a message to the other network device and the other network device responds with an acknowledgement message. A client device receives the message and the acknowledgement message as well as respective times indicating actual times at which the message and the acknowledgement message were processed by one of the first and second network devices. The client device determines its location based on the times at which it received the message and the acknowledgement message and the difference between the actual processing times. This location may be refined by determining an angle between the client device and at least one of the network devices having multiple antennas and being configured for steered beam communications.

Method for determining location of wireless devices

Various embodiments provide systems and methods which disclose a device which may be used to determine an audio event based on receiving an audio signal. Based on the determined audio event, audio activity may be tracked. The tracked audio activity may be summarized based on a summary mode. Feedback of the summarized tracked audio activity may be based on a feedback mode.

Audio activity tracking and summaries

Certain aspects of the present disclosure generally relate to magnetometer calibration. In some aspects, a device may obtain multiple sets of magnetic field measurements corresponding to multiple local magnetic field strengths, wherein each set of magnetic field measurements is measured in association with an unknown local magnetic field strength. The device may calculate multiple error values using the multiple sets of magnetic field measurements, estimated values of the multiple local magnetic field strengths, and estimated hard iron bias values. The device may identify a set of hard iron bias values for magnetometer calibration based at least in part on comparing the multiple error values. The device may calibrate a magnetometer using the identified set of hard iron bias values.

Techniques for magnetometer calibration using selected measurements over time

Disclosed are systems, devices and methods for determining a range between devices based, at least in part, on measurements of wireless tone signals transmitted between devices. In particular, two devices may measure tone signals transmitted between the two devices for determination of a round-trip phase measurement. Obtaining multiple round-trip measurements from tone signals transmitted at different carrier frequencies may enable resolving at least some range ambiguities.

Methods and systems for measuring range between devices

Disclosed are methods, systems, devices, apparatus, computer-/processor-readable media, and other implementations, including a method that includes obtaining, at a mobile device, remote transmitter location estimates for one or more remote transmitters, obtaining, at the mobile device, a group of pedestrian dead-reckoning (PDR) measurements, obtaining, at the mobile device, a group of signal measurements for signals received from the one or more remote transmitters, and deriving at least one mobile device location estimate for the mobile device based on one or more inconsistency terms representative of inconsistency between different location solutions, for the at least one mobile device location estimate, computed using different data points from the remote transmitter location estimates for the one or more remote transmitters, the group of PDR measurements, and the group of signal measurements.

Multi-source positioning

A location device (e.g., realized at one or more of a mobile device and/or a location server) includes a wireless transceiver, one or more location sensors and a floor-plan of a venue. The location device determines a plurality of hypothetical locations of a mobile device in the venue in response to data sets provided by the one or more location sensors. The data sets are associated with obstacle indication values calculated for the venue or for regions of the venue including locations corresponding to the data sets. The obstacle indication values indicate the proximity or orientation of the obstacle edges in the region or in the venue. The location device refines the one or more hypothetical locations based on the obstacle indication values to provide an estimate of the current location of the mobile device.

Growing community of inventors

Cambridge, United Kingdom

Benjamin Tarlow