The invention relates to a method for determining by a direction finder (DF) the direction to a Target, which comprises (a) providing an antenna at said DF, and an array of antennas at the Target; (b) providing a compass at each of said DF and said Target, for determining the azimuth of the DF Heading and of the Target Heading, respectively, with respect to the North; (c) providing at said DF a look-up table which describes n antenna patterns, one per Transmission Mode that may be used respectively at the Target; (d) sequentially performing x Transmission Modes from the Target, each time using another pair of antennas, and during each of said Transmission Modes intentionally, and in a controlled manner attenuating a reception signal at the DF until a loss of communication, and recording the respective attenuation levels; (e) based on said x recorded attenuations levels and said look up table, determining by the DF the direction from the Target to the DF; and (f) receiving at the DF the azimuth of the Target, and based on (i) said determined direction from the Target to the DF (ii) azimuth of the Target; and (iii) azimuth of the DF; calculating by the DF the direction from the DF to the Target.

The present disclosure describes a methodology for tracking position and orientation of one or more electronic devices, which may receive charge through wireless sound power transmission based on pocket-forming. This methodology may include one transmitter and at least one or more receivers, being the transmitter the source of energy and the receiver the device that is desired to charge or power. The transmitter may identify and locate the device to which the receiver is connected for subsequently charge and/or charge it. In order to increase charging and/or powering of electronic devices, a plurality of sensors may provide information determining the optimal position and/or orientation aimed to receive charge and/or power at the maximum available efficiency.

A vehicle communication device includes: a position specification unit that configured to specifies coordinates of latitude and longitude of a subject vehicle as position information; a receiving unit that receives the communication frame transmitted from a surrounding terminal device, the communication frame including, in a region other than the data main part, low decimal place latitude/longitude coordinates that are low decimal place part of coordinates of latitude and longitude of the surrounding terminal device and that are not encrypted; and a surrounding terminal device position estimating unit that estimates coordinates of latitude and longitude of the position of the surrounding terminal device based on the coordinates of latitude and longitude of the subject vehicle and the low decimal place latitude/longitude coordinates of the surrounding terminal device.

An apparatus estimates successive headings of a mobile device based on respective results of measurements by the mobile device on radio signal transmitted by a plurality of transmitters to obtain estimated headings (201). It computes a mean heading based on a predetermined number of the estimated headings and computing a standard deviation of the predetermined number of estimated headings (202). It determines whether the mean heading is to be considered valid based on the computed standard deviation of the estimated headings (203). Finally, it provides an indication of the mean heading as an indication of a current heading of the mobile device for use by a specific application only if the mean heading is determined to be considered valid (204).

An image processing method includes the steps of providing at least one image of at least one object or part of the at least one object, and providing a coordinate system in relation to the image, providing at least one degree of freedom in the coordinate system or at least one sensor data in the coordinate system, and computing image data of the at least one image or at least one part of the at least one image constrained or aligned by the at least one degree of freedom or the at least one sensor data.

An approach to localization in an indoor environment makes use of a multiple antenna receiver (e.g., in a smartphone, tablet, camera) and knowledge of locations of one or more radio transmitters, which may be part of a data communication infrastructure providing data communication services to devices in the environment. Successive measurements of transmissions from the transmitters are recorded at the receiver as the device is translated and rotated in the environment. Rotation related measurements are also made at the device. The radio frequency and rotation related measurements are used to infer the location and orientation, together referred to as the pose, of the device. Phase synchronization of the transmitters and the receiver are not required. In general, accuracy of the pose estimate far exceeds that achievable using radio frequency measurements without taking into consideration motion of the device, and far exceeds that achievable using the inertial measurements alone.

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 method and apparatus for ranging finding of signal transmitting devices is provided. The method of signal reception is digitally based only and does not require receivers that are analog measurement devices. Ranging can be achieved using a single pulse emitting device operating in range spaced relation with a minimum of a single signal transmitter and a single digital receiver and processing circuitry. In general a plurality of transmitting pulsed emitters may be ranged and positioned virtually simultaneously in 3-dimensions (XYZ coordinates) using a configuration of a plurality of digital receivers arranged in any fixed 3-dimensional configuration. Applications may involve at least one single transmitter to receiver design to determine range, or at least one transmitted reflecting signal off from an object to determine range.

An RF position tracking system for wirelessly tracking the three-dimensional position of a tracked object. The tracked object has at least one mobile antenna and at least one inertial sensor. The system uses a plurality of base antennas which communicate with the mobile antenna using radio signals. The tracked object also incorporates the inertial sensor to improve position stability by allowing the system to compare position data from radio signals to data provided by the inertial sensor.

An apparatus, method and computer program is described comprising: sampling a positioning reference signal received at a user device of a mobile communication system from a communication node of the mobile communication system, wherein the received positioning reference signal is a multipath signal having a line of sight component; processing the sampled received positioning reference signal with the positioning reference signal as transmitted by the communication node; identifying, based on said processing, signal paths from the communication node to the user device relative to an angle of departure of the positioning reference signal; and generating a model to estimate at least one of an orientation of the user device and a gain of the one or more identified signal paths of the multipath signal.