A system for identifying a cable end is provided. The system comprises: a near end for the cable, wherein the near end is visible; a far end for the cable, wherein the far end is in a hidden location; a cover assembly connected to the far end of the cable, wherein the cover assembly includes a near field communication device and a transponder, wherein the near field communication device transmits a signal through the transponder; and a device configured to communicate with the near field communication device, and further configured to facilitate a user to find the location of the cap connected to the far end.

A system and method for determining a position of a target. The method includes determining a first direction to the target from a first observing position, estimating a first approximate position of the target based on the first direction and the first observing position, determining a second direction to the target from a second observing position, and estimating a second approximate position of the target based on the second direction and the second observing position. The method further includes determining a first approximate intersection point of (i) a first finite length line between the first observing position and the first approximate position of the target, and (ii) a second finite length line between the second observing position and the second approximate position of the target.

A directional receiver system may include a receiver, a plurality of receive antenna elements, and a circuit. The receiver may include an input port and an output. The plurality of receive antenna elements may be fixedly configured into a known geometric relationship to each other, and each of the receive antenna elements may be connected to the input port of the receiver. The circuit may be coupled to the output of the receiver, configured to determine time differences at which signals from a source are incident upon the antenna elements, and configured to determine an angular orientation of the source to the receive antenna elements based on the time differences.

A rotating element is mounted in a base body for rotation about an axis of rotation. An excitation circuit generates an excitation signal. A divider circuit divides the excitation signal into a base signal supplied to an evaluation circuit and into an outgoing signal supplied to a transceiving antenna. A waveguide circulates in an annular manner about the axis of rotation. The rotating element comprises a termination element protruding into the waveguide and has a reflective side. The transceiving antenna emits an electromagnetic signal into the waveguide propagating in two directions which is reflected from the reflective side and returned to and received by the transceiving antenna which generates in response a receiving signal supplied to the evaluation circuit which determines a position of rotation of the rotating element in relation to a reference position of rotation by evaluating the base signal and receiving signal in a resolution region.

An emitter positioning method based on spectrum monitoring big data processing comprises the following steps: station monitoring data obtaining, multi-station spectrum monitoring data-based emitter direction finding, multi-station spectrum monitoring data-based emitter cross positioning, and emitter continuous positioning.

A method for adjusting an installation orientation of an access point within a predefined area with an associated orientation is disclosed. The method includes obtaining, at a computing apparatus, angle of arrival estimates from each access point based on a wireless transmission from a wireless mobile device. The computing device generates an estimated location of the wireless mobile device based on the angle of arrival estimates. Next, the computing device determines an orientation error for each wireless access point based on the angle of arrival estimate of the wireless mobile device and the estimated location of the wireless mobile device. The computing device generates an adjusted orientation of one or more of the access points based on the orientation error of the access point, thereby aligning the adjusted orientation with the orientation of the predefined area.

A system for managing a paper roll includes an IC tag for long distance that is a non-contact passive type mounted on each of a plurality of paper rolls; a transmitter that transmits a radio wave toward the plurality of paper rolls; a receiver that receives a response radio wave from each of the paper rolls for the transmitted radio wave; a control device including a tag position calculation unit that calculates a three-dimensional position of the IC tag which has emitted the response radio wave, based on information regarding the received response radio wave; and a storage unit that stores three-dimensional position information of each of the plurality of paper rolls from information regarding the calculated three-dimensional position and paper information, which is specific to each of the paper rolls, as linked information.

Apparatuses and methods are disclosed that allow for the detection, identification and direction finding of search and rescue beacons in a variety of environments. The techniques may be used to identify a line of bearing (LOB) to 121.5 MHz rescue beacons found in aircraft (ELTs), marine beacons (EPIRBs), and personal locator beacons (PLBs). Multiple lines of bearing may be used to geo-locate a target emitter if so desired. The methods may utilize, for example, a handheld device that is designed for search and rescue activity. Additionally, this device may be able to decode a 406 MHz frequency beacon that communicates with the satellite system that is controlled by COSPAS SARSAT. This constellation of rescue satellites coordinates the location of 406 MHz rescue beacons.

Disclosed herein are techniques of geo-location for building sites including: providing means for determining a precise position; providing an application; starting the application; providing at least one feature option to the user of the application, the at least one feature option including at least one option that uses the precise position; acting upon at least one feature action on behalf of the user, the at least one feature action including at least one action that uses the at least one feature option; interacting with a 3D end point on the basis of the at least one feature action; and providing a final output that takes into account the interaction with the 3D end point. Users are enabled to precisely position building information that specifies precise construction deficiencies of a building site in a 3D model and to address those deficiencies during construction.

A method of determining the location of a mobile computing device includes measuring a first time of flight (ToF) value and a first value of received energy of direct path (EDP) (P.sub.R) of a number of acknowledgement (ACK) packets received in response to a number of first probe packets sent to a first mobile device. The method calculates a preliminary distance value (d.sub.0) using a ToF-based distance equation, selects an ACK packet with a distance closest to d.sub.0 from the number of ACK packets, calculates an initial path loss exponent (.sub.0) of the selected ACK packet sample using d.sub.0 and P.sub.R. With the access point, the method also includes measuring a second P.sub.R for a second number of ACK packets received in response to a number of second probe packets sent to the first mobile device, calculates a supplemental distance value using an EDP-based distance equation and the .sub.0, and determines the location of the mobile device using multilateration and the supplemental distance value.