A mobile device may receive a plurality of timestamps, wherein the plurality of timestamps indicate sending and receiving time for ranging packets and response packets. The mobile device may calculate a responder turn-around time as a first difference between the second time and the first time. The mobile device may calculate a responding round trip time as a second difference between the second time and the third time. The mobile device may receive from the electronic device an initiator turn-around time and an initiator round trip time. The mobile device may calculate a frequency offset for the wireless protocol using the responder turn-around time, the responding round trip time, the initiator turn-around time, and the initiator round trip time. The mobile device may compare an observed frequency offset to the calculated frequency offset to determine a frequency offset difference and whether it exceeds a threshold, adjusting a ranging measurement.

A radar system may include (1) a wearable device, (2) a set of radar devices secured to the wearable device, wherein the set of radar devices (A) transmit radar signals to at least one transponder and (B) receive the radar signals, (3) an error-mitigation device secured to the wearable device, wherein the error-mitigation device provides data for mitigating position errors in triangulation calculations involving the radar signals, and (4) at least one processing device communicatively coupled to the set of radar devices and the error-mitigation device, wherein the processing device (A) calculates, based at least in part on roundtrip flight times of the radar signals and the data, distances between the set of radar devices and the transponder and (B) triangulates, based at least in part on the distances, a three-dimensional location of the transponder relative to the wearable device. Various other apparatuses, systems, and methods are also disclosed.

A mobile device may receive a plurality of timestamps, wherein the plurality of timestamps indicate sending and receiving time for ranging packets and response packets. The mobile device may calculate a responder turn-around time as a first difference between the second time and the first time. The mobile device may calculate a responding round trip time as a second difference between the second time and the third time. The mobile device may receive from the electronic device an initiator turn-around time and an initiator round trip time. The mobile device may calculate a frequency offset for the wireless protocol using the responder turn-around time, the responding round trip time, the initiator turn-around time, and the initiator round trip time. The mobile device may compare an observed frequency offset to the calculated frequency offset to determine a frequency offset difference and whether it exceeds a threshold, adjusting a ranging measurement.

An apparatus, method, and computer program product are provided to filter and modify option data objects and weighted values associated with option data objects through the application of specific rule sets based on the relative density of option data objects within a particularized area. In some example implementations, option data objects and related parameters are parsed to identify locations associated with the option data object and a weighted value, such as a weighted value generated by a predictive model. Based at least in part on the location associated with the option data object, a determined location of a user of a mobile device, and location-specific distance criteria, the weighted value associated with the option data object may be modified to reflect distance-related option election probabilities.

A method and devices are disclosed for producing a RTT vector (RTV) that is based upon the change in an airborne measuring station position and the corresponding RTT results taken at known time intervals to a ground based target station. In one embodiment, the target station is an access point or station conforming to the IEEE 802.11 standard and the airborne measuring station 110 may also be a device that conforms to the IEEE 802.11 standard. The disclosed method enables the location of a target station to an accuracy in the order of, for example, less than one half degree of bearing within, for example, a period in the order of 5 seconds.

A location detection system includes a first directional radar sensor, a second directional radar sensor and a controller. The first directional radar sensor has a first facing direction and a first radio coverage correspondingly, and is used to receive a first response signal upon detecting an object. The second directional radar sensor has a second facing direction and a second radio coverage correspondingly, the second radio coverage being partially overlapping with the first radio coverage, and is used to receive a second response signal upon detecting the object. The controller is used to determine which region the object is located in according to receptions of the first response signal and the second response signal.

A light emitting system comprises an angularly varying light emitting device (AVLED) operable to individually adjust light flux output from the one or more light sources into different angular bins in the environment and a light sensor positioned to receive light from the environment. The AVLED emits light flux into different angular bins in the environment, the at least one light sensor provides first information related to light from the light flux from each of the different angular bins reflected from the environment in one or more spatial zones, and the AVLED adjusts the light flux output in at least one angular bin based at least in part on analysis of the first information received by the light sensor and a target light property for the one or more spatial zones. The target light property may be luminance, irradiance, or illuminance.

A mobile device may receive a plurality of timestamps, wherein the plurality of timestamps indicate sending and receiving time for ranging packets and response packets. The mobile device may calculate a responder turn-around time as a first difference between the second time and the first time. The mobile device may calculate a responding round trip time as a second difference between the second time and the third time. The mobile device may receive from the electronic device an initiator turn-around time and an initiator round trip time. The mobile device may calculate a frequency offset for the wireless protocol using the responder turn-around time, the responding round trip time, the initiator turn-around time, and the initiator round trip time. The mobile device may compare an observed frequency offset to the calculated frequency offset to determine a frequency offset difference and whether it exceeds a threshold, adjusting a ranging measurement.

An ultra-wideband assisted precise positioning system and an ultra-wideband assisted precise positioning method are provided. The method includes: arranging a plurality of device nodes in a target area; configuring a central control device node to communicatively connect to the device nodes; configuring the device nodes to perform a positioning process to obtain measured distances and positioning positions to be corrected; and configuring a central control processor to execute a positioning algorithm. The positioning algorithm includes: obtaining the measured distances and the positioning positions to be corrected; for each of the positioning positions to be corrected, performing a center-of-gravity weighting processing on neighboring points for obtaining initial guess positions; and obtaining the initial guess positions to input to an optimizer and optimize an objective function, and finding corrected positions with relatively smallest errors. The objective function includes empirical weights associated with distance errors of the measured distances.

A partially coordinated radar system is provided comprising: a radar transmitter; a radar receiver; processing circuitry; a first spatial information indicator; a side channel communication system to send radar waveform configuration information from the transmitter to the receiver; processing circuitry to use the waveform information to configure the radar receiver to receive the waveform signal; determine radar-based spatial information based upon the radar waveform signal; determine a mismatch of clocks or local oscillators of transmitter and receiver; and generating a compensation signal indicating correction information to compensate for the determined at least one mismatch.