Abstract: A radar system and a method for a radar system configured with a gating mechanism is disclosed. The method includes determining, by a computing device, one or more first pulse attributes related to a first set of reflected electromagnetic pulses during a first period of time. The method further includes operating, by the computing device, a modulator to append a modulated signal to a set of emitted electromagnetic pulses. The method further includes determining, by the computing device, one or more second pulse attributes related to a second set of reflected electromagnetic pulses during a second period of time. The method further includes determining, by the computing device, based on the one or more first and second pulse attributes, a change of position of the object within the FOV of the radar system during a period between the first period of time and the second period of time.

Abstract: Disclosed is an ultra-wide band (UWB) radar device including a first antenna circuit including a first transmission circuit, a first reception circuit, a first oscillator that supplies a first clock signal to the first transmission circuit and the first reception circuit, and a first frequency counter, a second antenna circuit including a second transmission circuit, a second reception circuit, a second oscillator that supplies a second clock signal to the second transmission circuit and the second reception circuit, and a second frequency counter, and a controller that detects the target. The controller corrects a frequency error between the first clock signal and the second clock signal and compensates for a synchronization error between the first antenna circuit and the second antenna circuit.

Abstract: Some demonstrative aspects include radar apparatuses, devices, systems and methods. In one example, a radar system may include a plurality of radar devices. For example, a radar device may include one or more Transmit (Tx) antennas to transmit radar Tx signals, one or more Receive (Rx) antennas to receive radar Rx signals, and a processor to generate radar information based on the radar Rx signals. In one example, the radar system may be implemented as part of a vehicle. In other aspects, the radar system may include any other additional or alternative elements and/or may be implemented as part of any other device or system.

Abstract: An embodiment includes a method of multi-user gesture recognition includes determining positions of a plurality of users based on a first radar information from at least one radar, determining a plurality of regions of interest for the plurality of users based on positions of the plurality of users, in a first duty cycle of a plurality of duty cycles, obtaining a second radar information using a first radar configuration that includes a first set of parameters for gesture recognition at a range of distances based on the plurality of regions of interest, in a second duty cycle, obtaining a third radar information using a second radar configuration, and detecting a first user gesture from a first user of the plurality of users and a second user gesture from a second user of the plurality of users based on the second and third radar information.

Abstract: Ultra-wideband (UWB) radar and ranging sessions is performed. Responsive to one or more mobile devices being detected within the vehicle, an inside schedule mode is activated with an inside scheduling of UWB radar sessions and UWB ranging sessions for UWB anchors of the vehicle. Responsive to the vehicle entering a key-off state, and no mobile devices being detected within the vehicle, an outside schedule mode is activated with an outside scheduling of UWB radar sessions and UWB ranging sessions for the UWB anchors of the vehicle. In the inside schedule mode, the UWB anchors perform localization within the vehicle and moving object detection outside the vehicle. In the outside schedule mode, the UWB anchors perform localization of the one or more mobile devices outside the vehicle and moving object detection and/or localization inside and/or outside the vehicle.

Abstract: A multiple-input-multiple-output (MIMO) radar system comprises two or more software-defined millimeter-wave (SDMMW) nodes, a host processing system that is electrically coupled to the two or more SDMMW nodes, and a MIMO aperture array coupled to the two or more SDMMW nodes. The MIMO radar system is configured to form a MIMO TX channel and a MIMO RX channel for each of the two or more SDMMW nodes. The MIMO radar system includes a millimeter wave (MMW) frequency-modulated continuous wave (FMCW) oscillator source configured to generate a MMW FMCW signal. For each of the two or more SDMMW nodes, the radar system includes an upconverter assembly and a downconverter assembly.

Abstract: Example embodiments describe a radio device for wireless communication and radar sensing, the radio device including: a transmitter configured to generate a modulated RF signal and to transmit the modulated RF signal via a transmitting antenna; and a receiver configured to receive a modulated RF signal via a receiving antenna and to down-convert the received modulated RF signal. The radio device additionally includes a selector unit configured to provide the receiver with a copy of the transmit modulated RF signal, or, a local oscillator signal for down-converting the received modulated RF signal, thereby enabling wireless communication and radar sensing operation.

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.