A rotatable antenna apparatus has a fixed unit for attachment of the apparatus to an external structure, and a rotatable unit mounted on the fixed unit for rotation relative to the fixed unit. The rotatable unit comprises both an antenna assembly and processing circuitry coupled to the antenna assembly for performing signal processing operations. The apparatus further includes a thermally conductive shaft connected to the rotatable unit and located for rotation within the fixed unit, and a thermally conductive coupling structure to conduct heat from one or more heat generating components of the processing circuitry into the thermally conductive shaft. A heat sink within the fixed unit is thermally coupled to the thermally conductive shaft to draw heat away from the thermally conductive shaft. This provides an efficient mechanism for removing heat from the rotatable unit, whilst still allowing the rotatable unit to be sealed against external environmental conditions.

A method of direction finding (DF) positioning based on a simplified antenna platform format in a wireless communication network is proposed. A receiver receives antenna platform format information of a transmitter having multiple antenna elements. The antenna platform format information comprises an antenna platform format indicator, antenna platform position and orientation information, a number of antenna elements, and switching delay, phase center, and polarization information for each antenna element. The receiver receives a plurality of direction finding sounding signals transmitted from the transmitter via the multiple antenna elements. The receiver performs a DF algorithm based on the plurality of DF sounding signals and the antenna platform format information and thereby estimating a DF solution. Finally, the receiver determines its own location information based on the estimated DF solution.

A method for identifying a line of sight path and a wireless device are disclosed. In the method, an access point (AP) receives radio signals sent by a to-be-identified terminal through a plurality of paths, and obtains an energy of the radio signal transmitted through each of the paths. When a ratio of an energy of the radio signal transmitted through a candidate path to a total energy of the radio signals transmitted through the plurality of paths is greater than a threshold, the AP determines that the candidate path of the plurality of paths is a line of sight path.

This disclosure provides systems, methods and apparatuses, including computer programs encoded on computer storage media, for performing a ranging operation with a responder device. In one aspect, an apparatus exchanges a number of measurement frames with the responder device. The apparatus captures a number of timestamps based on the exchanged measurement frames. The apparatus estimates a carrier frequency offset between the responder device and the apparatus, and reports information indicative of the captured timestamps to the responder device.

A method of identifying and classifying social complex behaviors among a group of model organisms, comprising implanting at least one RFID transponder in each model organism in said group of model organisms; enclosing said group of model organisms in a monitored space divided into RFID monitored segments; RFID tracking a position of each model organism by reading said at least one RFID transponder in each model organism over a period of time; capturing a sequence of images of each model organism over said period of time; and calculating at least one spatiotemporal model of each model organism based on time synchronization of said RFID tracked position of said model organism with said sequence of images.

A method of identifying and classifying social complex behaviors among a group of model organisms, comprising implanting at least one RFID transponder in each model organism in said group of model organisms; enclosing said group of model organisms in a monitored space divided into RFID monitored segments; RFID tracking a position of each model organism by reading said at least one RFID transponder in each model organism over a period of time; capturing a sequence of images of each model organism over said period of time; and calculating at least one spatiotemporal model of each model organism based on time synchronization of said RFID tracked position of said model organism with said sequence of images.

A method and computer for pointing a beam of a directional antenna located above ground is disclosed. A method includes receiving a beam width 2, and determining an angle .sub.max where .sub.max+ is an angle for a projection of maximum signal strength on the ground. .sub.max is based on the beam width 2 and tilt angle . The method also includes determining an effective ground beam width defined by a total relative gain of the directional antenna and the above the ground to ground range being at half the maximum signal strength on the ground at angles above and below .sub.max. The method further includes determining a ground footprint of the beam based at least on part on the determined effective ground beam width, and causing the antenna to be pointed based at least in part on the determined ground footprint of the beam.

A split architecture is disclosed for determining the location of a wireless device in a heterogeneous wireless communications environment. A detector within the device or another component of the environment receives signals including parameters for a localization signal of the device. The parameters describe known in advance signals within the signals. Additional metadata including each frame start of the signals and assistance data and auxiliary information are also received. The known in advance signals are detected based on the parameters of the localization signal. Samples extracted from the known in advance signals are then processed and compressed and sent with other collect data to a locate server remote from the detector. The location server uses that information as well as similar information about the environment to calculate the location of the device, as well as perform tracking and navigation of the device, and report such results to the environment.

The disclosure relates to a pivot angle detection device and a method for detecting a pivot angle between a vehicle and a trailer coupling device that is coupled to the vehicle. A transmitter is hereby provided, which is designed for producing an electromagnetic field, as well as a receiver which is designed to detect a field strength of the electromagnetic field, whereby the transmitter and receiver are arranged towards each other on the vehicle and trailer coupling device in such a way that a change of the pivot angle produces a dependent change in the field strength that is detected by the receiver. Additionally, an evaluation device for determining the pivot angle based on the detected field strength is also provided. The disclosure also relates to a transmitter, a receiver and an evaluation device, that are designed for this purpose.

The disclosure relates to a pivot angle detection device and a method for detecting a pivot angle between a vehicle and a trailer coupling device that is coupled to the vehicle. A transmitter is hereby provided, which is designed for producing an electromagnetic field, as well as a receiver which is designed to detect a field strength of the electromagnetic field, whereby the transmitter and receiver are arranged towards each other on the vehicle and trailer coupling device in such a way that a change of the pivot angle produces a dependent change in the field strength that is detected by the receiver. Additionally, an evaluation device for determining the pivot angle based on the detected field strength is also provided. The disclosure also relates to a transmitter, a receiver and an evaluation device, that are designed for this purpose.