Embodiments of the present disclosure relate to positioning target device. According to embodiments of the present disclosure, the location of the target device is measured by two anchor devices. The distances between the target device at a location and the anchor devices are measured and the distances between the target device at a further location and the anchor devices are also measured. The location of the target device is estimated based on the distances. In this way, fewer anchor devices are used to perform the positioning.

A computer-implemented method for precision hyperbolic location fingerprinting, the method comprising, at a computing system, the steps of: (a) receiving measured RSSI values associated with a plurality of fixedly-positioned sensor devices, wherein the plurality of fixedly-positioned sensor devices are stationary in known locations in a 2D environment and caused to transit radio signals to each other and measure characteristics of the received radio signals; (b) generating a raw RSSI fingerprint for each sensor device based on the measured RSSI values; (c) generating a log-ratio RSSI fingerprint between a pair of sensor devices; (d) normalizing the raw RSSI fingerprint and normalizing the log-ratio RSSI fingerprint; (e) combining the raw RSSI fingerprint and the log-ratio RSSI fingerprint to form a fusion RSSI fingerprint; and (f) repeating steps (a) to (e) at predetermined intervals to enhance prediction accuracy of regional fingerprints within the environment.

A computer-implemented method for precision hyperbolic location fingerprinting, the method comprising, at a computing system, the steps of: (a) receiving measured RSSI values associated with a plurality of fixedly-positioned sensor devices, wherein the plurality of fixedly-positioned sensor devices are stationary in known locations in a 2D environment and caused to transit radio signals to each other and measure characteristics of the received radio signals; (b) generating a raw RSSI fingerprint for each sensor device based on the measured RSSI values; (c) generating a log-ratio RSSI fingerprint between a pair of sensor devices; (d) normalizing the raw RSSI fingerprint and normalizing the log-ratio RSSI fingerprint; (e) combining the raw RSSI fingerprint and the log-ratio RSSI fingerprint to form a fusion RSSI fingerprint; and (f) repeating steps (a) to (e) at predetermined intervals to enhance prediction accuracy of regional fingerprints within the environment.

An information handling system is disclosed and includes a processor, a memory, a power management unit (PMU), at least two antennas, and a wireless interface operatively coupled to the at least two antennas. The processor may execute code instructions for a distance and direction detection module therein configured to enable phase-based ranging with narrow band tone exchange, to add at least one constant tone duration to a wireless data signal frame, to monitor for nearby peripheral devices, and to measure at least two distances between each of the at least two antennas at the information handling system and a nearby peripheral device using switching between the at least two antennas.

The present invention relates to methods of improving accuracy of positioning a node in a cellular system. The invention discloses a method for receiving reference signal and assistance information at different antenna on each antenna port per antenna group in each time interval from antenna beams of a transmitter in a time orthogonal manner using the configuration information. The method also comprises estimation of positioning parameters based on time domain multiplexing of the at least one reference signal and the at least one assistance information received on different antenna on each antenna port per antenna group. The invention further discloses methods of improving accuracy by estimating orientation of a user equipment, shortlisting best group of measurement of positioning parameters, and optimization of time and angle window for estimation of location of the user equipment.

A system and method for enhanced aircraft-based targeting senses RF emissions or other signals associated with a target while navigating a trajectory through a GPS-challenged airspace. While the target is being observed, the aircraft targeting system tracks GPS-challenged state vectors (e.g., via an onboard inertial reference system) and pressure altitudes consistent with each observation. When the aircraft emerges from the GPS-challenged airspace, the targeting system determines multiple GPS-driven subsequent absolute positions of the aircraft. The targeting system determines a refined estimate of the target location via batch factor graph optimization of measurements taken while inside and outside of the GPS-challenged airspace.

A distance measuring device provided with measuring means for acquiring a transmission timing at which a probe packet was transmitted to a probe target, and a reception timing at which a response packet to the probe packet was received from the probe target; response time calculating means for calculating a response time by using the transmission timing and the reception timing; medium storing means for storing a medium velocity, which is a signal transmission velocity in a transmission medium used for transmission between a distance measuring device and the probe target; and distance calculating means for calculating a distance to the probe target by using the response time and the medium velocity.

A distance measuring device provided with measuring means for acquiring a transmission timing at which a probe packet was transmitted to a probe target, and a reception timing at which a response packet to the probe packet was received from the probe target; response time calculating means for calculating a response time by using the transmission timing and the reception timing; medium storing means for storing a medium velocity, which is a signal transmission velocity in a transmission medium used for transmission between a distance measuring device and the probe target; and distance calculating means for calculating a distance to the probe target by using the response time and the medium velocity.

Methods and devices useful in performing precise indoor localization and tracking are provided. By way of example, a method includes locating and tracking, via a first wireless electronic device, a plurality of other wireless electronic devices within an indoor environment. Location ambiguity mitigation is performed using characteristics of signals received by a reference node used to generate a radio frequency map of electronic devices.

Accurate position capability can be quickly provided using a Wireless Local Area Network (WLAN). When associated with a WLAN, a wireless device can quickly determine its relative and/or coordinate position based on information provided by an access point in the WLAN. Before a wireless device disassociates with the access point, the WLAN can periodically provide time, location, and decoded GPS data to the wireless device. In this manner, the wireless device can significantly reduce the time to acquire the necessary GPS satellite data (i.e. on the order if seconds instead of minutes) to determine its coordinate position.