Abstract: A traffic radar system comprises a first radar transceiver, a second radar transceiver, a speed determining element, and a processing element. The first radar transceiver transmits and receives radar beams and generates a first electronic signal corresponding to the received radar beam. The second radar transceiver transmits and receives radar beams and generates a second electronic signal corresponding to the received radar beam. The speed determining element determines and outputs a speed of the patrol vehicle. The processing element is configured to receive a plurality of digital data samples derived from the first or second electronic signals, receive the speed of the patrol vehicle, process the digital data samples to determine a relative speed of at least one target vehicle in the front zone or the rear zone, and convert the relative speed of the target vehicle to an absolute speed using the speed of the patrol vehicle.

Abstract: In an aspect, a radar controller determines a radar slot format that configures transmission of a reference radar signal on a first symbol over a first link from a first base station to a second base station followed by at least one target radar signal on at least one second symbol over at least one second link from the first base station to the second base station, and transmits an indication of the radar slot format to the first base station and the second base station. The first base station transmits, and the second base station receives, the reference radar signal and the at least one target radar signal in accordance with the radar slot format.

Abstract: A garden and/or forestry system has a hand-held gardening and/or forestry processing apparatus, and an assistance device, which is formed separately from the gardening and/or forestry processing apparatus and which is designed to support a user in operation of the gardening and/or forestry processing apparatus. The assistance device has a user interface, by which the assistance device is controllable by user inputs. The hand-held gardening and/or forestry processing apparatus has a user-actuable operator control element for user inputs to the user interface.

Abstract: In some examples, a radar system comprises a plurality of antenna elements spatially distributed to form a sparse antenna array orthogonal to a range dimension of the radar imaging system, wherein the plurality of antenna elements are configured to transform a plurality of independent radar signals for a field of view. The system can also include an image processing system that is configured to recover interaction information gained from interaction of the plurality of independent radar signals with the field of view; use the interaction information to identify radar imaging data about the field of view; and form one or more three-dimensional (3D) voxels of the field of view using the radar imaging data.

Abstract: This vehicle inspection system comprises: a monitor that displays a simulated image captured by a camera and imitating external environment information; a target device that returns an irradiation wave from an electromagnetic sensor as a reflected wave; a simulator device that changes the external environment information by changing the simulated image or the reflected wave; and an inspection device that inspects actuators of a vehicle to be inspected on the basis of the changed external environment information.

Abstract: Techniques are provided for single sided beam management in a millimeter wave (mmW) communication system for use in bistatic radio frequency (RF) sensing. An example method of tracking targets with bistatic radio frequency sensing includes receiving a scanning reference signal, generating a scanning signal report indicating one or more target groups associated with the scanning reference signal, transmitting the scanning signal report, receiving tracking signal configuration information indicating a tracking reference signal associated with the one or more target groups, receiving the tracking reference signal identified in the tracking signal configuration information, and tracking the one or more target groups associated with the tracking reference signal.

Abstract: A full duplex radio apparatus comprising: a transmit path configured to transmit a first signal; a receive path configured to receive a received signal; a near-receive path for observing a first period of the received signal; a far-receive path for observing a second period of the received signal, the far-receive path comprising a radio frequency limiter; a self-interference cancellation circuit coupled between the transmit path and the near receive path; a variable impedance component; and a directional coupler comprising a first port, a second port, a third port, and a fourth port, wherein: the first port is coupled to the receive path; the second port is coupled to the radio frequency limiter of the far-receive path; the third port is coupled to the self-interference cancellation circuit; and the fourth port is coupled to the variable impedance component.

Abstract: An example method to determine an object spin rate may include receiving a radar signal of a particular object in motion. The method may further include converting the radar signal into an input vector. The method may also include providing the input vector as input to a neural network. The neural network may include access to a set of initial data that has been generated based on multiple initial radar signals of multiple initial objects in motion. The method may further include determining a spin rate of the particular object in motion based on an analysis performed by the neural network of the input vector including time and frequency information of the particular object in motion in view of the set of initial data. The analysis may include comparing one or more elements of the input vector to one or more elements of the set of initial data.

Abstract: A synthetic visual system for an aircraft may comprise: a camera in electronic communication with a controller; a radar system in electronic communication with the controller; a three-dimensional cockpit display in electronic communication with the controller via a synthetic weather system; and a tangible, non-transitory memory configured to communicate with the controller. The three-dimensional cockpit display may be configured to display a three-dimensional weather image based on correlated data between the radar system and the camera.

Abstract: The target detection accuracy of a radar apparatus is improved. The radar apparatus includes transmission circuitry, which, in operation, transmits a transmission signal using a plurality of transmit antennas, and reception circuitry, which, in operation, receives using a plurality of receive antennas a reflected wave signal that is the transmission signal reflected by an object, in which the plurality of transmit antennas include at least one first transmit antenna and a plurality of second transmit antennas, and, in a first direction, an absolute value of a difference between, on one hand, a spacing between the at least one first transmit antenna and a phase center of those of the plurality of second transmit antennas which are used for beam synthesis, and, on another hand, a spacing between adjacent receive antennas of the plurality of receive antennas is a defined value based on a wavelength of the plurality of transmission signals.

Abstract: A radar image processing device includes at least one memory configured to store instructions; and at least one processor configured to execute the instructions to: determine a search range based on a reference block and a layover direction, the reference block being set as an area of interest in a radar image generated from data obtained by an imaging radar, the layover direction being a direction in which layover occurs in the radar image and being estimated from an incident direction of an electromagnetic wave used for observation by the imaging radar; extract a similar block that is similar to the reference block and included in the search range by searching the search range; and perform filtering processing for reducing speckles generated in the radar image by using the reference block and the extracted similar block.

Abstract: A novel and useful safety functionality assurance mechanism incorporating an RF built in self-test (RFBIST) system in a radar system having a plurality of transmitter devices and receiver devices. The RFBIST functions to verify, inter alia, that the transmitted signal is operating correctly and that all channels transmit a proper, valid or ‘legal’ signal and that the receiver devices are also operating correctly. A higher level of safety assurance is achieved by comparing safety data between the receiver devices. In one embodiment, the signal received from the various transmitter devices is compared. The RFBIST circuit block eliminates the physical transmit antenna position properties to compare the transmitted signal properties after signal path elimination. Thus, the present invention is capable of (1) validating multiple transmitter devices with a single receiver device and (2) validating multiple receiver devices with a single transmitter device.

Abstract: System and method for determining a 3D coordinate of a moving target are provided. The system may obtain 2D detection data of the moving target generated by a 2D detection device including two detection assemblies that are mounted at a known height above a horizontal plane along a first axis that forms a tilting angle with the horizontal plane. The system may determine a 2D coordinate of the moving target in a first coordinate system including the first axis and a second axis that is perpendicular to the first axis based on the 2D detection data. The 2D coordinate of the moving target may include a first value of the first axis and a second value of the second axis. The system may determine the 3D coordinate of the moving target in a second coordinate system based on the 2D coordinate, the tilting angle, and the known height.

Abstract: A radar device includes a transmission module that generates a transmission chirp signal synchronized with a timing signal, and reception modules that each receive a reflected wave and a direct wave of the transmission chirp signal emitted from the transmission module, and perform mixing on a received signal, using a reception chirp signal, the reception chirp signal being synchronized with the timing signal and having the same slope as the transmitted chirp signal. The radar device includes a signal processor that detects a target on the basis of a beat signal resulting from the mixing performed by the reception modules. The signal processor detects a level of the beat signal generated from the received direct wave from the transmission module to the reception modules. The signal processor determines a failure of the radar device by comparing the detected level with a threshold.

Abstract: Examples of active millimeter-wave imaging systems are described which may utilize modulation schemes to provide illumination signals. The use of modulation techniques may allow for the use of direct-conversion receivers while retaining an ability to separate desired received signal from self-jamming and/or DC offset signal(s) generated by the direct-conversion receivers. In some examples, modulation schemes include the use of balanced orthogonal codes which may support MIMO or massive MIMO imaging systems.

Abstract: A radio frequency (RF) system includes a radar monolithic microwave integrated circuit (MMIC), which includes: a phase detector including a test input port, and a monitoring input port, wherein the phase detector is configured to generate an output signal that represents a phase difference between a test signal received at the test input port and a monitoring signal received at the monitoring input port; a test signal path including at least one active component, the test signal path configured to receive a local oscillator signal and provide the local oscillator signal as the test signal to the test input port during a first measurement interval; and a passive signal path configured to receive the local oscillator signal and provide the local oscillator signal to the monitoring input port as the monitoring signal during the first measurement interval.

Abstract: A reconfigurable GPR device for acquiring radar data about a medium includes a radar antenna with a first polarization, a processor unit connected to the antenna, and a casing around the antenna and the processor unit. Further the device includes at least one of a wheel assembly and a direction-determining unit. If present, the wheel assembly includes a holder, a wheel and a wheel rotation sensor. The wheel rotation sensor is connected to the processor unit, and an axis of the wheel is pivotal relative to the first polarization. If present, the direction-determining unit is connected to the processor unit and adapted to determine directional information. The directional information is descriptive of an angle between a direction of movement of the device and the first polarization.

Abstract: A guided wave radar level gauge comprising a housing providing explosion proof protection and having an intrinsically safe output, a transmission line probe connected to the IS output. The housing encloses radar level gauge circuitry which is incompatible with intrinsic safety requirements, a microwave unit connected to the IS output, an electrical barrier connected between the RLG circuitry and the microwave unit, the electrical barrier having a barrier ground potential which is independent from the grounded housing wall, and a set of blocking capacitors connected between the microwave unit and the IS output.

Abstract: To provide an object position detection system in which positions of detection target objects are determined with accuracy, in which pairing accuracy increases, and in which accuracy of detecting the detection target objects increases. Radar devices 2A and 2B receive, with respective reception antennas 31, reception waves obtained by transmission waves that have been transmitted from respective transmission antennas 25 being reflected back from a plurality of targets T1, T2, T3, T4, . . . , and Tm and calculate relative distances to the plurality of targets T1, T2, T3, T4, . . . , and Tm from beat frequencies between the transmission waves and the reception waves without using pieces of phase information of the transmission waves and the reception waves. An arithmetic device 4 includes a pairing means and a position calculation means.

Abstract: An antenna for improving an influence of surface waves and increasing a beamwidth includes: a substrate, a first metal ground, a second metal ground, an emitting end and a receiving module. The first metal ground and the second metal ground are disposed on a first surface of the substrate. The second metal ground is completely separated from the first metal ground by a first gap. The emitting end is disposed on the first metal ground and includes a transmission line and a plurality of radiating elements. The receiving module is disposed on the second metal ground and includes a first receiving end and a second receiving end. The first receiving end includes a transmission line and a plurality of radiating elements. The second receiving end includes a transmission line and a plurality of radiating elements.