A liquid crystal antenna and a manufacturing method thereof are disclosed. The liquid crystal antenna includes: an antenna array including a first substrate and a second substrate arranged opposite to each other and configured to change a phase of an electromagnetic wave signal fed into the liquid crystal antenna to transmit or receive a beam in a preset direction; and an inertial navigation element configured to determine a motion parameter of the liquid crystal antenna in a navigation coordinate system, the inertial navigation element is disposed on a side of the second substrate facing the first substrate; and the antenna array adjusts the preset direction according to the motion parameter acquired by the inertial navigation element.

A system for accurate positioning of a communication devices includes a plurality of positioning cells configured for synchronizing to the cellular network and to each other, and for emitting positioning signals during time intervals proximal to time points at which the cellular network emits synchronization signals. In the manner, the positioning signals reach the communication device when the communication device's antenna is on for listening to a synchronization signal of the cellular network. Processing the times of arrival of the positioning signals by a server in communication with the communication device enables accurate positioning of the communication device.

A method and device for enhancing positioning are provided, the method includes: a first communication node generates a second positioning reference signal; the first communication node sends the second positioning reference signal, herein, one or more of the following parameters of the second positioning reference signal is/are different from that/those of the first positioning reference signal: sequence generation mode, transmission time frequency resource, sending period, transmission power, continuous duration. The above technical scheme can help the positioning system to improve the positioning accuracy.

A vehicle optical wireless data communication system includes a plurality of light sources disposed at a structure where vehicles travel. Each of the light sources emits visible light to illuminate the building or structure. Each of the light sources emits optical signals indicative of a location of the respective light source. A sensor is disposed at a vehicle and is operable to sense optical signals emitted by the light sources when the vehicle is in the vicinity of the light sources. Responsive to sensing by the sensor of optical signals emitted by at least one of the light sources, the sensor generates an output to a processor disposed at the vehicle. The processor processes the output of the sensor to determine a location of the vehicle relative to at least one of the light sources.

A signal enhancer has a framework, a concave reflector having an axis of reflection, joined to the framework in a manner that direction of the axis of the reflector may be varied, and a support a cellular telephone joined to the axis in a manner that a cellular telephone may be placed and held in the support at different distances from the reflector along the axis of the reflector.

A processing apparatus including one or more processors and memory determines a first context of a first user at a first location in a physical space based on sensor measurements from one or more sensors of a set of one or more devices coupled to the first user and detects movement of the first user to a second location in the physical space based on sensor measurements from one or more sensors of the devices. The processing apparatus determines a second context of the first user at the second location based on sensor measurements from one or more sensors of the devices and generates, based on the first context, the second context, and the movement of the user from the first location to the second location, a first mapping of the physical space that includes information corresponding to a spatial relationship between the first context and the second context.

A management system for a plant facility is disclosed. The system includes a server, a mobile terminal, and beacon transmitters. The beacon transmitter is attached to or embedded into a field device in the plant facility and broadcasts a beacon signal including an identifier of the field device. The server includes a display, a storage that stores process data corresponding to the identifiers, and a controller that receives wireless signals including the identifiers from the mobile terminal and identifies the process data corresponding to the identifiers received with the wireless signals. The mobile terminal includes a display, a beacon receiver that receives the beacon signals, and a controller that transmits the wireless signals to the server with the identifiers received with the beacon signals. At least one of the displays of the server and the mobile terminal displays the process data identified by the controller of the server.

An electronic device and a method for controlling an external device thereof are provided. The method for controlling an external device by an electronic device includes: in response to a trigger input being sensed, determining an external device from among a plurality of external devices that is indicated by the electronic device; providing a user interface (UI) screen of an application corresponding to the external device indicated by the electronic device; and in response to a user command being input through the UI screen of the application, transmitting a control signal corresponding to the user command to the external device indicated by the electronic device.

A frequency correction for frequency difference of arrival geolocation of transmitted target signals may be provided. A frequency of a target signal may be determined at a first collector based upon a first reference timebase source. A frequency of the target signal may be determined at a second collector based upon a second reference timebase source. An observed frequency of a reference carrier signal based upon the first reference timebase source may be determined at the second collector based upon the second reference timebase source. A relative timebase error between the first collector and the second collector may be calculated based upon a difference between the intended frequency of the reference carrier signal and the observed frequency of the reference carrier signal. A corrected frequency difference for the target signal may be calculated based upon the relative timebase error and a proportional scaling factor.

A method for correcting a positioning location is provided. The method includes: receiving current positioning information; comparing a current Mobile Country Code (MCC) comprised in the current positioning information with a previous MCC comprised in previous positioning information; determining whether a moving speed of a mobile device is greater than a speed threshold according the current positioning information and the previous positioning information when the current MCC is the same as the previous MCC; determining whether the mobile device has moved after determining that the moving speed is not greater than the speed threshold; and identifying a final positioning location according to a determination result indicating whether the mobile device has moved.