A tracking device uses user-guided trilateration to determine a current location of the tracking device. The tracking device receives a request to locate the tracking device from a user of a mobile device communicatively connected to the tracking device. The tracking device receives a series of locations of the mobile device and corresponding distances between the mobile device and the tracking device at each of the locations. The tracking device provides instructions to the user of the mobile device to move to each of the series of locations to collect location and distance data. The tracking devices performs a trilateration operation on the series of locations and corresponding distances to determine a location of the tracking device and provides the determined location to the mobile device for display.

To provide an object position detection system in which positions of detection target objects are determined with accuracy, in which pairing accuracy increases, and in which accuracy of detecting the detection target objects increases. Radar devices 2A and 2B receive, with respective reception antennas 31, reception waves obtained by transmission waves that have been transmitted from respective transmission antennas 25 being reflected back from a plurality of targets T1, T2, T3, T4, . . ., and Tm and calculate relative distances to the plurality of targets T1, T2, T3, T4, . . ., and Tm from beat frequencies between the transmission waves and the reception waves without using pieces of phase information of the transmission waves and the reception waves. An arithmetic device 4 includes a pairing means and a position calculation means.

Machine-readable media, methods, apparatus and system for automated vehicle with target localization are disclosed. In some embodiments, the system may comprise at least three receivers on a first vehicle, wherein each of the at least three receivers is to receive a first signal of a first wavelength from a transmitter of a second vehicle; and a controller to calculate one or more first location candidate of the second vehicle with respect to the first vehicle, at least in part based on differences among first signal path lengths for the first signal to travel from the transmitter to each of the at least three receivers.

Some disclosed devices include a plurality of transmitter/receiver pairs configured for transmitting and receiving millimeter wave (mmWave) radar and a control system configured for obtaining, via a first transmitter/receiver pair, a first round-trip time for a first reflection from an object proximate the apparatus. The control system may be configured for obtaining, via a second transmitter/receiver pair, a second round-trip time for a second reflection from the object and for determining a position of the object based, at least in part, on the first round-trip time and the second round-trip time.

A method for signal evaluation in a locating system that includes multiple radar sensors whose locating ranges overlap one another. The method includes evaluating the signal of a first of the radar sensors and identifying distance cells that are not empty, for at least one of these distance cells: selecting a second of the radar sensors and determining a distance range in which the objects situated in the distance cell would have to be situated from the viewpoint of the second radar sensor, and classifying the object configuration in the distance range, based on the signal of the second radar sensor.

A positioning device and positioning method in which a first wireless signal is transmitted along a first signal path having a first signal path angle that changes relative to time; second wireless signal data representing a response of a wireless station to the first wireless signal is received; a third wireless signal is transmitted along a second signal path; and an assumption that an obstruction is between the wireless communication device and the wireless station is generated if the wireless communication device receives a response from the wireless station to the first wireless signal but does not receive a response from the wireless station to the third wireless signal; wherein the second signal path is a linear path.

Methods, systems, and devices for wireless communications are described. A device may transmit, to a set of receiving devices, a configuration for probing a location of an object. The configuration may include a timing gap associated with at least one transmission window and a reception window for a probing pulse signal, and the configuration may indicate for the set of devices to suspend wireless communications during the timing gap to receive a reflection of the probing pulse signal. The device may transmit the probing pulse signal to the object during the transmission window. The device may receive the reflection of the probing pulse signal from the object during the reception window. In some cases, the device may update a communication configuration for the object, or another device associated with the object, based on the reflection of the probing pulse signal.

This disclosure enables various technologies involving various actions based on tracking an object via a plurality of distance sensors, without synchronizing carrier waves of the distance sensors or without employing a PLL technique on the distance sensors.

A device comprising circuitry configured to: obtain radar signal measurements simultaneously acquired by two or more radar sensors having overlapping fields of view, derive range information of one or more potential targets from samples of radar signal measurements of said two or more radar sensors acquired at the same time or during the same time interval, the range information of a single sample representing a ring segment of potential positions of a potential target at a particular range from the respective radar sensor in its field of view, determine intersection points of ring segments of the derived range information, determine a region of the scene having one of the highest densities of intersection points, select a ring segment per sensor that goes through the selected region, and determine the most likely target position of the potential target from the derived range information of the selected ring segments.

A method of direction of arrival estimation with an automotive spread radar system. The automotive spread radar system includes a plurality of at least two transceiver antenna units, which are configured to work in a MIMO configuration, wherein the transceiver antenna units are arranged at a priori known positions. The automotive spread radar system is configured to determine, for each transceiver unit antenna unit of the plurality of transceiver antenna units, a range of a target reflecting radar waves that have been transmitted by at least the specific transceiver antenna unit by reading out a plurality of range gates assigned to a specific transceiver antenna unit. The method and radar system are capable of estimating a direction of arrival without the need of ensuring a synchronization of antennas on the scale of a radar carrier frequency.