The disclosure pertains to using ultra-wideband (UWB) radio communications to execute a pedestrian-vehicle rendezvous. In one example operation, a personal device such as a smartphone, is used to identify a location of a vehicle with a first level of accuracy. For example, the smartphone may be used by a pedestrian to obtain GPS location coordinates of a ride-hail vehicle summoned by the pedestrian. The vehicle may be located relatively far from the pedestrian. The smartphone may be configured to automatically establish a UWB radio link with a UWB transponder in the vehicle and/or a smartphone carried by a driver of the ride-hail vehicle, when the vehicle is within range to establish UWB communications. The UWB radio link may be used to execute one or more of various procedures to locate the vehicle with a second level of accuracy that is higher than the first level of accuracy.

Systems are provided for determining location of tags in an environment. The system includes at least one mobile antenna that moves around the environment. The absolute location associated with the mobile antenna is known and it sends and receives messages including at least one of time of arrival, time of departure, signal strength and angle of arrival. A measurement module performs distance measurement between the at least one mobile antenna and at least one tag in the environment to obtain at least. The distance measurements are associated with at least two locations of mobile antenna. A storage module records the distance measurements at the at least two locations and the at least two locations. A location module computes a location of each of the at least one tags based on the recorded distance measurements at the at least two locations and the recorded locations of the mobile antenna.

A system including a polarized radio frequency (RF) scanning reference source and one or more cavity sensor receivers. The system uses a sensor processor to apply Fourier integration to extract a fundamental frequency and, at least, a fundamental frequency and two predetermined harmonics from the received output of the one or more cavity sensor receivers in determining a reference time of the reference clock.

A method of tracking a radio beacon includes receiving radio beacon signals at electronic hub devices having known locations. The electronic hub device including both omni-directional and multi-directional antennas receiving radio beacon signals from the radio beacon. Changes over time of the received signal strengths at the omni-directional and multi-directional antennas are analyzed to determine a direction gradient or a direction of travel of the radio beacon.

Methods and apparatus for improving the provision of a procedure based upon automated determination of a location of agents and equipment during a procedure and quantifying conditions in an environment via automated sensors. The present invention provides apparatus and methods for wireless designation of a position of health care providers and equipment relative to each other based upon wireless communications amongst multiple wireless transceivers combined with ongoing monitoring of conditions present in a facility. The transceivers may be portions of nodes and nodes may form self-verifying arrays. A user interface may provide a augmented reality view of positions of all or some the providers and equipment and condition quantifying sensors.

Described examples include light fixtures and/or radio frequency (RF) nodes located in a service volume provided with a mobile asset detection system. The RF nodes receive beacon signals transmitted by mobile assets within the service volume. The mobile asset detection system includes a processor, a transceiver and multi-element antenna array. The multi-element antenna array includes multiple discrete antenna elements that, in some examples, are arranged so that at least one of the discrete antenna elements is non-coplanar with the other discrete antenna elements of the antenna array. Using signal attribute values determined from a signal received via each of the respective discrete antenna elements, a three dimensional estimate of the location of the mobile assets in a service volume may be determined.

Methods and apparatus for improving the provision of a healthcare procedure based upon automated determination of a location of healthcare agents and equipment during a healthcare procedure and quantifying conditions in an environment via automated sensors. The present invention provides apparatus and methods for wireless designation of a position of health care providers and equipment relative to each other based upon wireless communications amongst multiple wireless transceivers combined with ongoing monitoring of conditions present in a healthcare facility. A user interface may provide a augmented reality view of positions of all or some the healthcare providers and equipment and condition quantifying sensors.

Methods and apparatus for determining an item of equipment in a direction of interest based upon coordinates derived from wireless communication between wireless transceivers. A smart device assembly is operative to communicate via multiple antennas with a reference point transceiver. A set of coordinates is generated indicating a relative position and/or angle of the wireless transceiver in relation to the reference position transceiver. A query may be made based upon the relative position and angle of the wireless transceiver in relation to the reference position transceiver. A response to the query may include a human readable interface indicating one or more of: direction of travel, a virtual image based upon location and location and direction, and annotative and pictorial information.

Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.

A tracking system for use in head-mounted display apparatus includes at least one emitter that emits signals; a first receiver and a second receiver that sense the emitted signals and generate sensor data, the first receiver and the second receiver being arranged on a first portion and a second portion, respectively, wherein the first portion faces a user when the head-mounted display apparatus is worn by the user, and the second portion is a part of a user-interaction controller of a head-mounted display; and a processor configured to process the generated sensor data to determine relative positions and orientations of first receiver and second receiver with respect to the emitter, and to determine a relative position and orientation of the second receiver with respect to the first receiver.