One or more processors obtain a first radio environment signature associated with an aerial vehicle (AV) and a second radio environment signature associated with a computing device. Responsive to determining that the first radio environment signature and the second radio environment signature satisfy a similarity criteria, the one or more processors generate a validation data object verifying one or more of (i) that a location of the AV substantially corresponds to a location of the computing device at a time associated with at least one of the first radio environment signature or the second radio environment signature, (ii) a AV delivery associated with the AV and the computing device, or (iii) a AV pickup associated with the AV and the computing device. The one or more processors store or provide validation information based on the validation data object.

In some implementations, a locating agent may identify, at the locating agent, one or more identifiable access points, each identifiable access point establishing a wireless network and being identifiable to the locating agent via a signal broadcast from the identifiable access point. The locating agent may compare the identified one or more identifiable access points to an access-point database defining known access points to the wireless tracking system. The locating agent may connect to one of the identifiable access points based on the comparing. The locating agent may transmit one or more of sensed and monitoring data captured at the locating agent to an external device via the connected access point.

Disclosed is an approach to enable radio map download for Global Navigation Satellite System (GNSS)-denied areas. In particular, processor(s) (e.g., of positioning server(s)) could identify GNSS-denied area(s) in an initial radio map, the GNSS-denied area(s) being (i) one or more areas in which at least one GNSS signal is or was unavailable and (ii) a subset of a plurality of areas represented by the initial radio map. Subsequently, the processor(s) could generate a partial radio map representing radio data only for the GNSS-denied area(s) identified in the initial radio map, and could then transmit the partial radio map to a mobile device for storage at the mobile device. In this way, the mobile device could optimize resource usage and perform radio-based position estimations at least in the GNSS-denied area(s) that were identified.

Methods of deriving location information of a wireless device include deriving, in the continuous domain, a location of a wireless device and at least one time and location varying path loss function parameter. The coordinates and parameter are derived based on signal strength measurements made at the wireless device, with the measured signals originating from a plurality of wireless transmitters, such as access points. The derived path loss function parameter can include one or more of a path loss exponent parameter, an intercept parameter, a receiver antenna gain parameter, transmitter antenna gain parameter, or a transmit power parameter.

Various embodiments determine a position of a wireless device and enable the wireless device to retrieve the determined location. In one embodiment, a system comprises of at least one wireless transmitting device, a plurality of wireless receivers, and at least one server. Each of the plurality of wireless devices receive signals from the wireless transmitting device with unknown position and send time stamped information to the server. Each of the plurality of wireless device also sends unique identifying information about the wireless transmitting device. The server calculates a position of the wireless transmitting device by considering the inputs received from the plurality of wireless receivers. The wireless device obtains its position from the server. The process can be executed on demand or at regular frequent intervals.

Provided is a positioning support table generation method performed by a computing apparatus, the method including generating a three-dimensional (3D) map based on geographic and building information about a predetermined area; setting a plurality of grid points on the 3D map; determining a first base station corresponding to a grid point with respect to each of the plurality of grid points set on the 3D map; calculating at least one physical parameter about a first signal that arrives at the grid point from the first base station and at least one physical parameter about a second signal that arrives at the gird point from a second base station that is one of base stations adjacent to the first base station; and generating a positioning support table based on the at least one physical parameter about the first signal and the at least one physical parameter about the second signal.

Passive location of an emitter is achieved by sensing a signal propagated from the emitter at multiple sensing locations and determining its phase at each sensing location. A three-dimensional region is searched to find an emitter location for which phase estimates of the signal at the emitter location are in good agreement among the sensing locations. An iterative search from a set of starting points in the region may be performed. The region may be subdivided and each region searched in parallel using multiple processors in parallel. Phase at the sensing locations may be determined locally, using synchronized clocks at the sensing locations, or at a common receiver. In the latter case, signal propagation time from the sensing location to the receiver location is taken into account. The emitter may be a wireless endoscopy capsule, for example.

Disclosed is an approach for detecting that a state of an air-conditioning system in a building has changed and ultimately determining the air-conditioning system's operating pattern, which could help improve collection and/or use of crowdsourced data for an indoor positioning solution and thus lead to more accurate position estimates. According to the disclosed approach, while a mobile device is in the building, processor(s) may detect that the mobile device is stationary and may responsively (i) cause the mobile device to provide pressure data representing air pressure in the building while the mobile device is stationary and (ii) subsequently receive the pressure data from the mobile device. And based on the pressure data indicating a pressure change and representing air pressure in the building while the mobile device is stationary, processor(s) may detect that a state of the air-conditioning system in the building has changed.

A method for localization includes obtaining a request to localize an electronic device within an area, wherein the area includes a set of anchors. The method also includes transmitting a first message to the electronic device and a second message to the set of anchors. the first message includes a time for the electronic device to transmit a measurement signal and the second message includes the time for the set of anchors to receive the measurement signal from the electronic device. The method further includes receiving, from the set of anchors, signal information associated with the measurement signal. Additionally, the method includes identifying a location of the electronic device within the area based on the signal information. The method also includes transmitting, to the electronic device, the location of the electronic device within the area.

Systems and methods for WiFi mapping an industrial facility are disclosed. The system comprises a self-driving vehicle having a WiFi transceiver. The self-driving vehicle communicates with a fleet-management using the WiFi transceiver, via a WiFi access point. The self-driving vehicle receives a mission from the fleet-management system, and moves to a destination location based on the mission, using autonomous navigation. While executing the mission, the self-driving vehicle simultaneously measures the received signal strength indication of the WiFi access point and other WiFi access points in the facility, and stores the received signal strength indication in association with the location at which the received signal strength indication was measured.