Systems, methods and apparatus for automatic alarm management in a radio-frequency (RF) environment are disclosed. An apparatus calculates a power distribution by frequency of the RF environment in real time or near real time, including a first derivative and a second derivative of FFT data of the RF environment. The apparatus then creates a baseline based on the power distribution by frequency of the RF environment in a period of time, identifies at least one alarm situation based on a multiplicity of alarm triggering conditions by comparing the power distribution in real time or near real time to the baseline of the RF environment, identifies at least one signal based on the first derivative and the second derivative of FFT data in the at least one alarm situation, and sends at least one alarm comprising details of the at least one signal identified in the at least one alarm situation.

A leakage electric field measurement device includes a first acquirer that measures a distance to an electric wire, a second acquirer that measures a leakage electric field of the electric wire, a third acquirer that acquires a captured image of the electric wire, and a controller that calculates a predicted value of the leakage electric field of the electric wire on the basis of the distance measured by the first acquirer and the leakage electric field measured by the second acquirer, performs determination of whether or not the electric wire is a live wire according to comparison between an assumed electric field of the electric wire and the predicted value, and generates a composite image in which a result of the determination is superimposed on the captured image acquired by the third acquirer.

Systems and methods for non-intrusive program tracing of a device are disclosed. The methods involve generating a program trace signal from at least one of power consumption and electromagnetic emission of the device; digitizing and decomposing the program trace signal into at least two digital program trace component signals including a low frequency program trace component and one or more high frequency program trace component signals; classifying fragments of the at least two digital program trace component signals of the program trace signal as at least one of a known portion of program code and an observed behavior of the device. Each of the at least two digital program trace component signals have different frequency bands and the bandwidth of each program trace component signal is smaller than the bandwidth of the program trace signal. Each of the high frequency program trace component signals include an envelope.

Disclosed is a measurement system for analyzing RF signals, comprising an optically transparent enclosure including an optically pumpable medium being exposed to an electromagnetic field of the RF signal to be analyzed; an optical pump for penetrating the medium with intensity-modulated light, the intensity defining an absorption sensitivity of the medium; a field generator for generating an electric and/or magnetic field within the enclosure, a strength of the generated field defining an absorption frequency of the medium; a controller for controlling the absorption sensitivity of the medium in dependence of the absorption frequency of the medium; and a detector for detecting an optical property of the penetrating light passing through the medium. This facilitates fine-tunable and frequency-dependent control of sensitivity and dynamic range for spectral analysis of RF signals.

Methods, apparatus, devices, and systems for three-dimensional (3D) displaying objects are provided. In one aspect, a method includes obtaining data including respective primitive data for primitives corresponding to an object, determining an electromagnetic (EM) field contribution to each element of a display for each of the primitives by calculating an EM field propagation from the primitive to the element, generating a sum of the EM field contributions from the primitives for each of the elements, transmitting to each of the elements a respective control signal for modulating at least one property of the element based on the sum of the EM field contributions, and transmitting a timing control signal to an illuminator to activate the illuminator to illuminate light on the display, such that the light is caused by the modulated elements of the display to form a volumetric light field corresponding to the object.

The measuring apparatus according to the present invention searches each of subbands divided from a target band set with respect to the Frequency Distribution Information (FDI) obtained periodically to find a unit band corresponding to a maximum frequency component among unit bands pertaining to said each subband; marks the found unit band as a Dominant Unit Band (DUB); organizes a DUB distribution table by collecting a plural pieces of the FDI as much as a predetermined time; checks a distribution locus of DUBs on the organized DUB distribution table. And, if it is confirmed that the DUB distribution table shows a specific distribution pattern corresponding to an acceleration sound, etc., the measuring apparatus makes a measured intensity to be identified as an intensity measured at a start position of a platform or a tunnel section, based on the time when the specific distribution pattern appears.

A method for wirelessly receiving and transmitting electromagnetic radiation and to an electronic device thereof, the method including: wirelessly receiving a first electromagnetic radiation; storing energy of the received first electromagnetic radiation in an energy storage; determining, from the amount of energy stored, whether energy stored in the energy storage should be provided to a demodulator and a comparator and/or to a modulator and a transmitter such that they are switched; wirelessly receiving a second electromagnetic radiation; demodulating the second electromagnetic radiation so that a first signal is generated, comparing the first signal with a set of signals; wirelessly receiving a third electromagnetic radiation; modulating the third electromagnetic radiation into a fourth electromagnetic radiation by using two different modulations, thereby modifying data contained in the third electromagnetic radiation; and wirelessly transmitting the fourth electromagnetic radiation.

A method, system and apparatus for compensating for non-ideal isotropic behavior of a field probe are disclosed. A method includes, during a calibration procedure, for each of a plurality of positions of the field probe relative to a source, each position denoted by a set of angles (θ,ϕ), performing the following steps: measuring a field by the sensors of the probe, storing the measurements and the set of angles (θ,ϕ) for each measurement, computing a correction factor for the set of angles (θ,ϕ) based on the measurement, and storing the correction factors. During a measurement procedure, each sensor measures a component of the field. A set of angles is determined based on the sensor measurements, and a correction factor is determined based on the set of angles. The correction factor may then be multiplied by the sensor measurements to obtain the corrected field measurements.

Systems, methods, and apparatus for detecting UAVs in an RF environment are disclosed. An apparatus is constructed and configured for network communication with at least one camera. The at least one camera captures images of the RF environment and transmits video data to the apparatus. The apparatus receives RF data and generates FFT data based on the RF data, identifies at least one signal based on a first derivative and a second derivative of the FFT data, measures a direction from which the at least one signal is transmitted, analyzes the video data. The apparatus then identifies at least one UAV to which the at least one signal is related based on the analyzed video data, the RF data, and the direction from which the at least one signal is transmitted, and controls the at least one camera based on the analyzed video data.

Disclosed is a method for calculating radio interference suffered by a communication device mounted on an electric power tower. The method includes: establishing a relative position model of the communication device mounted on the electric power tower and transmission lines, calculating interference field strength of the communication device on the electric power tower, and determining whether the radio interference field strength at the mounting point satisfies the requirements.