Abstract: The invention relates to a method and a device for probing a subsurface structure. The method comprises the steps of (a) sending a probe signal as an electromagnetic wave into the structure, (b) receiving an echo signal of the electromagnetic wave from the structure, and (c) processing the echo signal for deriving information about the structure. The step (c) of processing the echo signal comprises sampling the echo signal at a sampling frequency fs. The probe signal comprises multiple discrete frequency components fn,k, wherein at least two of the multiple frequency components fn,k are located in different Nyquist zones. An n-th Nyquist zone covers a frequency range from (n?1)*Tfs/2 to n*fs/2 with fs being the sampling frequency and n=1, 2 . . . . Further, k=1 . . . K and K is the number of frequency components fn,k in the n-th Nyquist zone. The method and device facilitate an increase in data acquisition speed without losing information on any of the frequency components.

Abstract: A method includes receiving, using radio frequency (RF) collectors, RF signals from a target object. The RF signals of target object may be converted to In-phase and Quadrature (I/Q) data. Navigation data of each RF collector may be determined and I/Q data of each of RF collectors are paired. Processing functions may be applied on paired I/Q data. Using paired I/Q data, one or more of time difference of arrival (TDOA) measurement data and frequency difference of arrival (FDOA) measurement data between each pair of the RF collectors are determined. One or more of TDOA measurement data, FDOA measurement data and navigation data of each RF collector are converted to message data. A trajectory of target object may be estimated based on confidence measure of one or more of TDOA and FDOA measurement data. Using estimated trajectory of target object for displaying on a display device of a computing device.

Abstract: In accordance with an embodiment, an imaging method includes: transmitting a first signal at a first moment in time, and transmitting a second signal at a second moment in time, wherein the first moment in time is different from the second moment in time, and the first signal and the second signal are different in one or more of the following: a frequency, a transmission location, or a transmission direction; receiving a third signal and a fourth signal, wherein the third signal is a signal obtained by reflecting the first signal via a first object, and the fourth signal is a signal obtained by reflecting the second signal via the first object; and determining an image of the first object based on the third signal and the fourth signal.

Abstract: Disclosed herein is to an angle-of-departure measurement technology that receives radio frequency signals transmitted from transmitting antennas and measures angular positions from the transmitting antennas with respect to the receiving antenna. A wireless receiver includes an IQ demodulator configured to perform IQ demodulation on signals received from the receiving antenna, a phase sample value can be calculated from a phase value of a ratio of I and Q signals, and a phase difference value between the plurality of transmitting antennas and the receiving antenna can be estimated from a phase sample value. An angular position of the wireless receiver can be calculated from the estimated phase difference value.

Abstract: A radar system for monitoring vehicles on a roadway comprises a radar control unit a radar subsystem including one or more antennas. The radar subsystem is in communication with the radar control unit. The radar system is configured to be positioned with the one or more antennas at a single position relative to an intersection. Additionally, the radar system is configured to receive radar data from all traffic entrances into the intersection using the radar subsystem.

Abstract: A radar system is described. The system comprises a radiation transmission unit, a radiation collection unit, and a processing unit. The radiation transmission unit is configured to generate electromagnetic radiation formed by a plurality of quantum entangled photons comprising first transmitted photon (signal) and second reference photon (idler). The radiation transmission unit transmits the first transmitted photons toward a region to be inspected and measures the second reference photons to obtain and store measured data thereof. The radiation collection unit comprises at least one radiation collection element configured to receive photons reflected from one or more objects in said region and generate data indicative of one or more parameters of the collected photons.

Abstract: A micro lens array that includes a planar array antenna including a plurality of planar antennas formed on a substrate, a plurality of dielectric lenses each provided above each of the plurality of planar antennas, and a plurality of dielectric plates each provided on part of the substrate, the part being provided between two adjacent dielectric lenses of the plurality of dielectric lenses.

Abstract: A system and method that balances the two competing interests of weapons detection while maintaining full egress capacity at a portal. A two-part weapons detection device is installed at the portal with one portion fixed to the floor at a side of the portal and the other portion is mounted to the door. With the door closed, the requisite weapons detection field can be established. When it becomes necessary to use the full egress capacity, the door can be opened without the need to remove or disengage the other portion. A laser scanner is also mounted at the top of the portal to establish an upper detection field to prevent a perpetrator from passing a weapon above the detection field. This system/method forms a “demising point” for a larger system and method that includes logical and physical building compartments for prioritizing staff protection against an assailant in an affordable manner.

Abstract: Systems and methods for automated unmanned aerial vehicle recognition. A multiplicity of receivers captures RF data and transmits the RF data to at least one node device. The at least one node device comprises a signal processing engine, a detection engine, a classification engine, and a direction finding engine. The at least one node device is configured with an artificial intelligence algorithm. The detection engine and classification engine are trained to detect and classify signals from unmanned vehicles and their controllers based on processed data from the signal processing engine. The direction finding engine is operable to provide lines of bearing for detected unmanned vehicles.

Abstract: Example microwave antenna probes, radio frequency arrangements, and methods for controlling an antenna patch connected to a microwave transmission line are disclosed. The antenna patch and the microwave transmission line are attached on a printed circuit board. An example microwave antenna probe includes a metal body, a waveguide, and a cavity. The metal body includes a bottom face and a top face opposing the bottom face. The waveguide is formed in the metal body. The cavity is formed at the bottom face of the metal body and is coupled with the waveguide and configured to enable microwave transition between the microwave transmission line and the waveguide. The microwave antenna probe is configured to disable the antenna patch and to redirect an antenna feeding signal from the microwave transmission line via the cavity to the waveguide when the antenna patch is contacted by the bottom face of the metal body.

Abstract: Techniques are provided for radar blanking using dynamic subinterval noise floor estimation. A radar blanking system implementing the techniques according to an embodiment includes a noise floor estimator configured to extract noise samples from a segment of in-phase (I) and quadrature (Q) input signal samples. The system also includes a blanking threshold calculator configured to calculate blanking thresholds based on statistics of the noise samples, the statistics including a mean of the noise samples and a standard deviation of the noise samples. The system further includes a blanking processor configured to select a subset of the IQ input signal samples that exceed the blanking thresholds and replace the selected subset of the IQ input signal samples with the mean of the noise samples to generate a blanked signal.

Abstract: A method includes obtaining wireless fidelity (Wi-Fi) based channel state information (CSI). The method also includes filtering the CSI to remove radio frequency (RF) interference. The method further includes executing a motion detection module that detects for motion in a space based on whether macro-movements are present in the filtered CSI, and provides an indication that the space is occupied upon detecting motion in the space. The method also includes, in response to the indication that the space is occupied, executing an occupancy detection module that detects whether the space is still occupied based on whether micro-movements and breath signals are present in the filtered CSI, retains the indication that the space is occupied upon detecting that the space is still occupied, and provides an indication that the space is not occupied upon detecting that the space is no longer occupied.

Abstract: The present disclosure relates to a security detection system. The system comprises a scanner configured to capture a number n of scans of a person in a scanning area at different body poses of the person; at least one pose detection sensor configured to detect information on the body poses of the person in the scanning area; and a processor configured to correlate sections of the scans which show at least one body part of the person in the different body poses; wherein the scanner is configured to capture at least one of the number of scans during a dynamic movement of the person in the scanning area.

Abstract: A system is provided for backlighting a radome. The radome includes a translucent section and an opaque section. The translucent section is translucent to visible light and the opaque section is opaque to visible light. At least one light source of visible light is arranged on the rear side of the radome, and is configured for direct illumination of the translucent section.

Abstract: The disclosure relates to the field of radar sensors, particularly to radar sensors for radar sensing using wireless communication signals. The method includes: receiving a reflected communication signal, wherein the reflected communication signal is a sent communication signal that is reflected by at least one object. The frequency of the sent communication signal is within a radar frequency range, and the sent communication signal includes a sent data payload, and the reflected communication signal includes a corresponding reflected data payload. The reflected data payload is compared with the sent data payload, resulting in a compared data payload; and a delay information and/or a velocity information of the at least one object is extracted from the compared data payload.

Abstract: A radar sensor. The radar sensor has a hollow waveguide structure and a high-frequency module, which are arranged on opposite sides of a printed circuit board, and has a coupling device for transmitting microwave signals between the high-frequency module and the hollow waveguide structure, the coupling device having a dielectric waveguide manufactured separately from the printed circuit board.

Abstract: A microwave motion detection system and lighting applications. Certain types of lighting devices turn on/off and may respond to certain triggers (e.g., motion-activation, dusk-to-dawn, etc.), etc. Such lighting devices may be battery powered and have minimal on-board circuitry. Coordinating these lighting devices together to provide zoned lighting functionality has not been commercially successful. Various aspects of the present disclosure are directed to “smart enough” lighting solutions. Smart enough lighting solutions may include link-based connectivity that enables coordination between peer lighting devices. The decentralized system may enable groups of smart enough lighting devices to communicate salient events (triggering conditions and operational parameters) across a mesh network, without centralized coordination.

Abstract: A target detection method according to the present disclosure includes generating a range-velocity map from a radar signal of an MPSK-MIMO FMCW radar, detecting a plurality of target signals including a real target signal and a ghost target signal for a target with respect to a velocity axis, estimating an angle of arrival of the target by applying a Capon beamforming algorithm to a target detection result, configuring a phase sequence by extracting phase values for the plurality of target signals from the range-velocity map and arranging the phase values in descending order of velocity value, and arranging differently a plurality of prediction phase values derived using the angle of arrival according to a preset rule to obtain a plurality of candidate phase sequences, and calculating a correlation coefficient between the phase sequence and the plurality of candidate phase sequences and identifying a real target signal in the range-velocity map.

Abstract: Millimeter (mm) waves, in comparison to microwaves, have short wavelengths and can penetrate to few centimeters inside the body. The embodiments herein provide a method and system for millimeter (mm) wave synthetic aperture radar (SAR) imaging for superficial implant monitoring. The mmWave SAR and consecutive an autofocusing SAR imaging are suitable for a superficial tissue and subsequent continuous implant monitoring due to their smaller form-factor and faster processing coupled with focused dielectric lens. Additionally, a limb topography is approximated for localization of implant region on interest (ROI) in the SAR amplitude image. Further, the method and system provide a bone implant monitoring in order to assess any unwanted mobility or dislocation of the implant, and thus bone health is a critical issue.

Abstract: A laser radar integrated device, including a cover plate (Q10, M10, N20, P60), a fixed support (Q20), a lifting structure (Q30), a pop-up structure (Q50), a laser radar (Q60), and a controller (Q70, D50). The cover plate (Q10, M10, N20, P60) is located on a vehicle fender (Q80, M200, N200, P200) and matches with the size of an opening in the fender (Q80, M200, N200, P200); the fixed support (Q20), the lifting structure (Q30), the pop-up structure (Q50), the laser radar (Q60) and the controller (Q70, D50) are located inside the fender (Q80, M200, N200, P200); the lifting structure (Q30) is disposed on the fixed support (Q20) and connected to the cover plate (Q10, M10, N20, P60); the laser radar (Q60) is disposed on the pop-up structure (Q50) which is disposed on the fixed support (Q20). Also disclosed is a vehicle provided with a laser radar integrated device.