Abstract: A network device may receive data for multiple wireless channels. The network device may determine an activity level or score for one or more of the wireless channels based on the received data. The network device may determine, based on the activity level for each wireless channel, a portion of the wireless channels that satisfy an activity level threshold. The network device may generate a ranking of the portion of the wireless channels that satisfy the activity level threshold. The ranking may be based on the activity level or score of each wireless channel. The network device may determine a wireless channel based on the ranking and may send an indication of the wireless channel to a user device.

Abstract: A system for identifying soil layers within a field includes a non-contact-based sensor configured to capture data indicative of a subsurface soil layer within the field. Furthermore, the system includes a computing system communicatively coupled to the non-contact-based sensor. In this respect, the computing system is configured to determine a thickness of the subsurface soil layer in a vertical direction based on the data captured by the non-contact-based sensor. Moreover, the computing system is configured to identify the subsurface soil layer as one of a compaction layer or a B-horizon based on the determined thickness.

Abstract: Obstacle detection and characterisation method, including the steps of: acquiring a first distance measurement obtained from at least one inertial measurement produced by at least one inertial sensor of a mobile terminal, and a second distance measurement obtained from at least one time of flight measurement; evaluating a distance error representative of a difference between the second distance measurement and the first distance measurement; from the distance error, detecting the presence of an obstacle between the mobile terminal and the reference equipment, and determining one or more characteristics of said obstacle.

Abstract: In an example, the present technique includes a method for capturing information from a spatial region to monitor human activities and create a spatial map of the spatial region. In an example, the technique allows a user of a cell phone to move from one location to another location and be tracked using rf backscattering, and each location being identified by the user by communicating a label via a cell phone or other mobile device.

Abstract: The disclosure relates to a method and device for acquiring augmented reality (AR) information or virtual reality (VR) information, a mobile terminal, and a storage medium. The method can include an image collection step where a radar wave is transmitted and an echo formed based on the radar wave is received. Based on a transmitting parameter of the radar wave and an echo parameter of the echo, spatial structure information of a collected object in the image collection can be determined. Further, AR information or VR information of the collected object is obtained according to the spatial structure information and a collected image.

Abstract: A system and method for space management monitoring and reporting using video analytics are disclosed. Such a building occupancy monitoring system monitors building resources that include rooms, areas such as work areas, and chairs and desks in the rooms, in examples. These building resources are monitored to determine whether the resources are being used by individuals, and for how long. In more detail, the system includes an image analytics module that tracks individuals in image data from surveillance cameras, relative to the building resources. The system also includes an occupancy report module that generates occupancy information including building resources that are used/unused by the individuals. The occupancy information is then used to program building control systems. Dwell maps and motion maps generated by the system, based on the occupancy information, can also be used to guide individuals to available building resources in a ‘hot desking’ environment.

Abstract: Disclosed is a method and apparatus for measuring a distance to a target object by using a radar signal in an environment where an obstacle is present. The disclosed method of measuring a distance by using a radar includes: receiving a radar signal reflected from a target object by passing through a target obstacle; estimating material of the target obstacle by using an obstacle material learning result which uses a waveform of a reference radar signal, and by using a waveform of the reflected radar signal; estimating a thickness of the target obstacle by using an obstacle thickness learning result which uses a frequency feature of the reference radar signal, and by using a frequency feature of the reflected radar signal; and calculating a distance to the target object by using a permittivity according to the material of the target obstacle, and the thickness of the target obstacle.

Abstract: An imaging system including a transmitter configured to transmit a signal in a direction of a scene of interest. The transmitted signal is spatially and temporally incoherent at a point where the transmitted signal reaches the scene of interest. The system includes a receiver set including at least a first receiver and a second receiver. The first receiver and the second receiver are configured to receive a reflected signal. The reflected signal is a reflection of the transmitted signal from the scene of interest. The system further includes an active incoherent millimeter-wave image processor configured to obtain the reflected signal and reconstruct a scene based on the reflected signal. The system also includes a display device configured to display the scene.

Abstract: A six-port self-injection-locked (SIL) radar includes an oscillation element, an antenna element, a six-port frequency demodulation element and a signal processing element. Because of a coupler and a phase shifter of the six-port frequency demodulation element, the signal processing element can extract vibration information of subject by using only two demodulated signals output from the six-port frequency demodulation element. As a result, the operation frequency of the six-port SIL radar is not limited by hardware architecture, and the hardware costs and the power consumption are also reduced.

Abstract: An object detection method includes: obtaining a first offset value and a second offset value, setting a first detection threshold value by adding the first offset value to a first reference threshold value, setting a second detection threshold value by adding the second offset value to a second reference threshold value, obtaining a detection input, and performing target detection upon the detection input according to at least the first detection threshold value and the second detection threshold value. The first offset value is different from the second offset value. The first reference threshold value is determined for detecting if at least one object with a first value of an object characteristic exists. The second reference threshold value is determined for detecting if at least one object with a second value of the object characteristic exists. The second value is different from the first value.

Abstract: A radar apparatus includes a plurality of transmission antennae and a radar transmitter that transmits transmission signals by using the plurality of transmission antennae. In a virtual reception array including a plurality of virtual antennae formed of a plurality of reception antennae and the plurality of transmission antennae, disposition positions of at least two of the virtual antennae are the same as each other, and, transmission intervals of the transmission signals that are sequentially transmitted from transmission antennae corresponding to the at least two virtual antennae among the plurality of transmission antennae are an equal interval.

Abstract: An unauthorized access to a vehicle is accurately detected.

Abstract: A radar system for tracking UAVs and other low flying objects utilizing wireless networking equipment is provided. The system is implemented as a distributed low altitude radar system where transmitting antennas are coupled with the wireless networking equipment to radiate signals in a skyward direction. A receiving antenna or array receives signals radiated from the transmitting antenna, and in particular, signals or echoes reflected from the object in the skyward detection region. One or more processing components is electronically coupled with the wireless networking equipment and receiving antenna to receive and manipulate signal information to provide recognition of and track low flying objects and their movement within the coverage region. The system may provide detection of objects throughout a plurality of regions by networking regional nodes, and aggregating the information to detect and track UAVs and other low flying objects as they move within the detection regions.

Abstract: A vehicle authentication system for authenticating a portable ID transmitter with respect to an authentication arrangement of a vehicle in order to release vehicle functions for an operator, includes a portable ID transmitter that has at least one ID transmitter-UWB-antenna. The authentication device has at least one first vehicle-UWB-interface having one first UWB antenna and a second vehicle-UWB interface with a second UWB-antenna. Control for the authentication device are also provided so that an authentication method can be carried out. Optionally, the authentication system can also include LF interfaces with LF antennas and proximity sensors.

Abstract: An ultra-wideband (“UWB”) communication system comprising a transmitter and a receiver having two antennas. An UWB signal transmitted by the transmitter is received at each of the antennas. By comparing the carrier phases of the received signals, the phase difference can be determined. From this phase difference and the known distance, d, between the antennas, the Cartesian (x,y) location of the transmitter relative to the receiver can be directly determined.

Abstract: In an example, the present technique includes a method for capturing information from a spatial region to monitor human activities and create a spatial map of the spatial region. In an example, the technique allows a user of a cell phone to move from one location to another location and be tracked using rf backscattering, and each location being identified by the user by communicating a label via a cell phone or other mobile device.

Abstract: A quantum atomic receiving antenna includes: a probe laser; a coupling laser; an atomic vapor cell that includes: a spherically-shaped or parallelepiped-shaped atomic vapor space and Rydberg antenna atoms that undergo a radiofrequency Rydberg transition to produce quantum antenna light from probe light such that an intensity of the quantum antenna light depends on an amount of radiofrequency radiation received by the Rydberg antenna atoms, the quantum antenna light including a strength, direction and polarization of the radiofrequency radiation; and a quantum antenna light detector in optical communication with the atomic vapor cell.

Abstract: A method and electromagnetic ranging system for determining the location of a target well. A method may comprise taking a first measurement with an electromagnetic ranging tool at a first position and calculating a first modeled signal. Additionally, calculating a calibration for the electromagnetic ranging tool from at least the first measurement and the first modeled signal, taking a second measurement with the electromagnetic ranging tool at a second position, and calculating a calibrated measurement. The method may comprise determining a distance, direction, and/or orientation to a target wellbore using at least the calibrated measurement. An electromagnetic ranging system may comprise an electromagnetic ranging tool and an information handling system coupled to the electromagnetic ranging tool.

Abstract: A first method includes receiving a first reflected radar signal from a target in a first field of view and receiving a second reflected radar signal from a target in a second field of view offset from the first field of view by a predetermined distance; transforming the first and second reflected radar signals to obtain first and second sets of frequency coefficients, from which a frequency-dependent phase difference is obtained; and calculating a time-delay from the slope of the frequency dependence. A second method includes obtaining summed difference values between the first and second radar responses, where each of the summed difference values corresponds to different time shifts between the first and second radar response, and deriving from the summed difference values a time-delay associated with the target's motion from the first field of view to the second field of view. A third method combines the time-delays or associated speeds obtained from independent estimators.

Abstract: Systems of multiple transmitters and multiple receivers, allowing receivers to identify the transmitters from which reference signals originate. Identification is according to frequency offset patterns based on transmitter and local oscillator frequencies, and is particularly suitable in radio-frequency integrated-circuit devices and MIMO radar systems.

Abstract: A human identifier system capable of distinguishing between multiple known people includes a first antenna and a second antenna. Particularly, the second antenna is operably selects the distance between to allow multiple people to walk, run or move between the antenna pairs. Additionally, the system also includes a radio frequency transmitter for generating multiple radio signals and a radio frequency receiver for receiving the transmitted radio signals. The system also includes a data processor operably connected to the radio frequency receiver with a processing means for processing the received signals from radio frequency receiver to provide output signals to identify a person walking, running or moving between the first antenna and the second antenna.

Abstract: In one embodiment, a method includes, by a computing system of a vehicle, providing one or more instructions configured to cause a first radar antenna to broadcast a modulated radar chirp signal. The modulated radar chirp signal may include data. The method includes receiving a first return signal that corresponds to the modulated radar chirp signal reflected off of an object in an environment. The method includes calculating a location for the object using the first return signal. The method includes receiving, from a second radar antenna, a second return signal indicating that the modulated radar chirp signal was received by the second radar antenna.

Abstract: A portable radar sensing device comprises: a millimeter-wave MIMO radar unit; a control unit, including at least one processor and at least one memory; at least one information outputting unit; and an operation interface; wherein the control unit is coupled to the millimeter-wave MIMO radar unit, the at least one information outputting unit and the operation interface for processing a biological detecting operation, and the biological detecting operation includes a space scanning operation and a biological target scanning operation.

Abstract: A system controls movement of a marine vessel near an object. The system includes a control module in signal communication with a marine propulsion system, a manually operable input device providing a signal representing a requested translation of the marine vessel, and a sensor providing a first distance between the vessel and a first point on the object and a second distance between the vessel and a second point on the object. The control module determines an actual angle between the vessel and the object based on the first distance and the second distance. In response to the signal representing the requested translation, the control module stores the actual angle between the vessel and the object as an initial angle and controls the marine propulsion system to produce thrust that will carry out the requested translation and that will maintain the initial angle.

Abstract: Apparatus, systems, and methods are provided for localizing lesions within a patient's body, e.g., within a breast. The system may include one or more markers implantable within or around the target tissue region, and a probe for transmitting and receiving electromagnetic signals to detect the one or more markers. During use, the marker(s) are into a target tissue region, and the probe is placed against the patient's skin to detect and localize the marker(s). A tissue specimen, including the lesion and the marker(s), is then removed from the target tissue region based at least in part on the localization information from the probe.

Abstract: A method to analyze of a vehicle's surroundings is specified. The method includes: arranging a first sensor group with at least two radar sensors on a vehicle, emitting radar waves using the radar sensors into the vehicle environment, reflecting the emitted radar waves at objects in the vehicle's environment, receiving the reflected radar waves using the radar sensors, identifying information about the vehicle's environment from the received radar waves and outputting the radar information. In order to improve the analysis of the carriageway environment, the radar sensors are arranged on the vehicle such that the emitted and received radar waves interfere. Radar information is obtained by taking account of the resulting interference data. In addition, a vehicle apparatus to analyze a vehicle's surroundings.

Abstract: A method of adaptative-array beamforming with a multi-input multi-output (MIMO) automobile radar includes a MIMO radar for transmitting a plurality of initial scanning beams in a radial direction. The plurality of initial scanning beams is transmitted one by one at each direction. Accordingly, the MIMO radar receives a reflected scanning beam, wherein each reflected scanning beam is associated with a corresponding initial scanning beam. The reflected scanning beam is used to detect at least one low-resolution target. Subsequently, the MIMO radar transmits a plurality of initial tracking beams, wherein each initial tracking beams is directed towards a low-resolution target. This results in generation of a corresponding reflected tracking beam for each of the plurality of initial tracking beams. Finally, the MIMO radar detects at least one high-resolution target within each reflected tracking beam.

Abstract: A radar system includes a transmitter, a receiver and a processor. The receiver receives radio signal that includes the transmitted radio signal reflected from targets in the environment. The received radio signal is provided to the processor. The processor samples the received radio signal during a plurality of time intervals to produce a sampled stream. The different time intervals of the plurality of time intervals will contain different signal levels of radio signals reflected from the targets. The processor also selects a particular time interval of the plurality of time intervals that is free of samples of radio signals reflected off of the targets that are closer than a first threshold distance from an equipped vehicle. The transmitter and/or the receiver is adjusted such that samples of radio signals reflected off of targets that are farther than the first threshold distance are detected.

Abstract: The disclosure provides an example of a system including a radio frequency (RF) wireless communication network (network) including a plurality of nodes in an area and a computer coupled to the network. Each of the nodes includes a transmitter and a receiver. At plurality of times, each transmitter transmits RF spectrum signals (signals) and each receiver receives the signals and also generates an indicator data of a signal characteristic of the received signal propagated in the network. When each time among the plurality of times is a current time, the computer obtains the indicator data of the signal, determines a modification in the indicator data at the current time from the indicator data at a preceding time due to a movement of an occupant in the area and detect an occupancy condition in the area based on the modification in the indicator data and a parameter of a configuration of the network.

Abstract: The various embodiments described herein include methods, devices, and systems for implementing radar-based touch interfaces. In one aspect, a computing device includes: (1) a casing; (2) a radar transceiver configured to detect one or more objects in the vicinity of the computing device; and (3) one or more controllers coupled to the radar transceiver, the one or more controllers configured to, for each detected object in the one or more detected objects: (a) determine whether the detected object is in contact with the casing based on data received from the radar transceiver; (b) in accordance with a determination that the detected object is in contact with the casing, identifying an input command based on at least one of: a location of the detected object, and a movement of the detected object; and (c) adjust operation of the computing device based on the input command.

Abstract: Systems and methods of operating an interference prevention system in a radar altimeter are provided. A method includes generating integer values with at least one pseudorandom noise sequence generator. The generated integer values are used as indexes to select at least one of start frequencies and stop frequencies from at least one frequency table for frequency modulated continuous wave (FMCW) ramps for a generated radar signal. The selected at least one of the start frequencies and the stop frequencies is provided to a frequency synthesizer. The at least one of start frequencies and the stop frequencies are used in generating transmit frames of the radar signal with the frequency synthesizer.

Abstract: An imaging device includes an antenna configured to transmit millimeter waves, a connector adapted to connect a radio frequency (RF) signal source with the imaging device and a signal path connected between the connector and the antenna. A nonlinear transmission line (NLTL)-based frequency multiplier is arranged along the signal path to receive an RF signal from the RF signal source and increase a frequency of the RF signal to millimeter frequency to produce a millimeter wave. A NLTL-based variable delay line is arranged along the signal path between the NLTL-based frequency multiplier and the antenna. A time delay of an NLTL of the NLTL-base variable delay line is variable to steer a beam of the millimeter wave in at least one dimension as the millimeter wave is transmitted by the antenna. A receiver processes a return signal received in response to the millimeter wave.

Abstract: Provided is an FMCW radar device capable of reducing pairing errors. With use of a first peak frequency change rate during a first chirp period and a second peak frequency change rate during a second chirp period, a first temporary range during the first chirp period and a second temporary range during the second chirp period are calculated. When a difference between the first temporary range and the second temporary range is equal to or less than a set threshold, a first peak frequency and a second peak frequency in a current processing period are paired with each other.

Abstract: A system, method and apparatus for enabling environment tracking at a monitored location. A wireless sensor network can support a beacon that can be configured to broadcast information to devices at the monitored location. The broadcasted information can be recorded by devices to generate an environment log that can enable identification of conditions of an environment as reflected by sensor measurements at the monitored location.

Abstract: A radar apparatus comprises a signal transmission unit, a signal reception unit, a determination unit, and a target detection unit. The signal transmission unit transmits a transmission signal for detecting a target object. The signal reception unit receives a reception signal generated when the transmission signal is reflected. The determination unit determines a presence of a clutter structure using frequency response information of the reception signal. The target detection unit detects a target object by correcting a detection threshold value for detecting a target object according to the determination result on the presence of the clutter structure and detects a target object.

Abstract: Method and apparatus for generating a power line communication (PLC) signal. In one embodiment, the method comprises generating a first modulation signal based on at least one data stream; modulating a first carrier signal by the first modulation signal to generate a first signal; generating a second signal by performing a phase shift based on the first signal; and coupling a balanced three-phase PLC signal comprising the first signal, the second signal and a third signal to a three-phase power line.

Abstract: A system for and a method of wirelessly monitoring one or more patients can include transmitting ultra-wideband pulses toward the one or more patients, receiving ultra-wideband signals, and sampling the ultra-wideband signals. Sampling the ultra-wideband pulses can be performed with a sample rate that is less than the Nyquist rate. Impulse response can be estimated and/or recovered by exploiting sparsity of the impulse response.

Abstract: Devices and systems, and methods of using them, for point-to-point transmission/communication of high bandwidth signals. Radio devices and systems may include a pair of reflectors (e.g., parabolic reflectors) that are adjacent to each other and configured so that one of the reflectors is dedicated for sending/transmitting information, and the adjacent reflector is dedicated for receiving information. Both reflectors may be in a fixed configuration relative to each other so that they are aligned to send/receive in parallel. In many variations the two reflectors are formed of a single housing, so that the parallel alignment is fixed, and reflectors cannot lose alignment. The device/systems may be configured to allow switching between duplexing modes. These devices/systems may be configured as wide bandwidth zero intermediate frequency radios including alignment modules for automatic alignment of in-phase and quadrature components of transmitted signals.

Abstract: Method and apparatus for generating a balanced three-phase power line communication signal. In one embodiment, the method comprises generating a plurality of modulation signals based on at least one data stream; modulating a plurality of carrier signals by the plurality of modulation signals to generate a balanced three-phase PLC signal comprising a first phase signal, a second phase signal, and a third phase signal; and coupling the balanced three-phase PLC signal to a three-phase power line.

Abstract: A system for determining precise position includes a chirp receiver that processes broadcast chirp signals in the frequency domain to distinguish direct path signals from multipath signals. The chirp receiver processes the received chirp signals, which consist of respective pulsed frequency sweeps, by combining a received chirp signal with a synchronized locally generated chirp signal and phase adjusting and concatenating the results over multiple sweeps, based on estimated clock phase errors and expected phase rotations of the direct path signals, to produce a sine wave. The phase adjustment and concatenation allows the use of longer Fast Fourier Transforms (FFTs) that, in turn, provide increased accuracy of frequency estimation and separate component signals that are very close in frequency.

Abstract: An electronic device and a method for sensing an active state of an object are provided; the electronic device includes a signal generating module, a non-symmetric antenna module and a signal analyzing module. The signal generating module is configured to generate a pulse width modulation signal, generate a measuring signal with overshoot and undershoot pulses according to the pulse width modulation signal, and generate a reference signal according to the measuring signal. The non-symmetric antenna module includes a transmitting antenna and a receiving antenna. The transmitting antenna is configured to transmit the measuring signal to an object. The receiving antenna is configured to receive the measuring signal reflected by the object. The signal analyzing module is configured to receive and process the reference signal and the measuring signal reflected by the object, so as to obtain an object active state signal.

Abstract: A method is provided. A first edge on a first gating signal is generated, and a local oscillator and a shared clocking circuit with the first edge on the first gating signal. A second edge on a second gating signal is generated following the first edge on the first gating signal, and a receiver circuit is activated with the second edge on the second gating signal, where the receiver circuit includes a mixer. A transmit pulse following the first edge on the first gating signal is generated with the transmit pulse having a third edge. A switch that short circuits outputs of the mixer is then released following the later of the third edge of the transmit pulse and a delay.

Abstract: A method and apparatus are provided for detecting a RADAR signal. RADAR channel data in a frequency range is received, where the frequency range is divided into a plurality of equally wide channels. The received RADAR channel data is digitally processed and analyzed to identify a signal in the RADAR channel data in the frequency range. The frequency range is advanced to a next channel of the plurality of channels, where the frequency range of the next channel of the plurality of channels is nonsequential with the frequency range of the first channel. The steps of receiving, processing, and analyzing are repeated for the next channel of the plurality of channels.

Abstract: A multichannel UWB-based radar life detector includes a transmitting antenna and three receiving antennas for forming three radar echo signal channels.

Abstract: A system includes a self-propelled robotic vehicle carrying an UWB sensor. The UWB sensor responds to binary transitions of a mode control signal to select for its modes of operation.

Abstract: A guided wave radar transmitter for interface measurement comprises a probe defining a transmission line for sensing level of two immiscible liquids to define an interface therebetween. A pulse circuit generates pulses on the transmission line and receives a reflected signal from the transmission line. The reflected signal selectively includes a level pulse representing material level and an interface pulse representing interface level. A controller operates in an interface mode to determine the material level and the interface level responsive to receiving the level pulse and the interface pulse. The controller operates in a medium identification mode responsive to not receiving the interface pulse, comprising calculating an estimated amplitude of the level pulse for the two immiscible liquids and comparing actual amplitude of the level pulse to the estimated amplitude of the level pulse to identify the medium in the vessel.

Abstract: In accordance with an embodiment, a method includes producing a baseband variable frequency signal and producing a substantially fixed frequency signal by phase-locking an oscillator to a substantially fixed reference frequency. The method further includes upconverting the baseband variable frequency signal by mixing the variable frequency signal with the substantially fixed frequency signal to produce an RF variable frequency signal.

Abstract: The invention relates to a machine tool monitoring device. It is proposed that the machine tool monitoring device comprises at least one signal unit for an ultra wide band operation.

Abstract: An electromagnetic body scanning system may include a measuring system for measuring data of radio waves scattered by a body in two distinct subbands; and a computer system. The computer system is arranged for constructing a first image of the body using the measured data, generating synthetic scattered data of the body in a frequency range outside the subbands, and constructing a second image of the body using both the measured data and the synthetic data. The step of constructing a first image includes matching an image to a human model.

Abstract: A presence detector unit (PDU) of the type relying on microwave radiation provides a signal indicating movement within a defined space when such movement occurs. A source of microwave radiation within a housing projects a beam of microwave radiation directed through a side of the housing to suffuse at least a portion of the defined space. A detector within the housing senses changes in microwave radiation reflected back toward the detector. An adjustable beam occlusion structure is supported by the housing and blocks a portion of the microwave radiation emanating from the source and through the side of the housing.