Abstract: A method and apparatus for determining the location of an object with a sensor positions an instrument at a first location, controls the instrument to transmit a first omnidirectional signal during a first time, and determines a first distance from the instrument to the static object using the first omnidirectional signal. The method and apparatus repeats this process in a serial manner at two other locations, and uses the respective distances from each location to determine the location of the object. Other embodiments are disclosed.

Abstract: A system for detecting GNSS signal jammers to be positioned on a roadside, the system comprises: a first device for receiving a GNSS signal; a second device that is configured to measure at least one characteristic of a received GNSS signal and to detect, on the basis of at least one characteristic, interference in the GNSS signal caused by a jamming signal; a third device for triggering the capture of an image of the road if the GNSS signal is subject to interference caused by a jamming signal, the first device configured to receive, via a radio link, a sequence of a satellite radionavigation signal received by a vehicle and retransmitted by the vehicle to the system via the radio link.

Abstract: There is provided a radar device configured to detect a target by executing signal processing on the basis of a transmission wave and a reflection wave of the transmission wave reflected on the target. An antenna unit having a plurality of antennas arranged in a vertical direction. A calculation unit configured to calculate vertical azimuths of the target on the basis of the reflection waves with respect to the transmission waves transmitted from each of the antennas, and to accumulate calculation results. An estimation unit configured to calculate moving average values of maximum values of the vertical azimuths on the basis of the calculation results accumulated by the calculation unit, and to estimate the moving average values of the maximum values, as a height of the target.

Abstract: The present disclosure relates to a method in which a radar apparatus for a vehicle detects a mounting angle and the radar apparatus for a vehicle, and more particularly, to a method for detecting a mounting angle of a radar apparatus for a vehicle using a power ratio of signals acquired by transmitting signals having different directivity angles and the radar apparatus for a vehicle.

Abstract: The present invention relates to a passive microwave sounder for a satellite, having a fixed reflection plate.

Abstract: The object of the invention relates to a method for measuring distance using wave signals (l1, I2, v), the essence of which is a first and a second transceiver device (E, M) suitable for emitting and receiving wave signals (l1, I2, v) are provided, a first sensing device (O?) suitable for receiving wave signals (l1, I2, v) is arranged at a distance D? from one of the first and second transceiver devices (E, M), wave signals (l1, I2, v) are sent and received by the first and second transceiver devices (E, M), which are also received by the first sensing device (O?), then on the basis of the distance D?, the time intervals (?E1E2, ?M1M2, ?O1?O2?, ?E2E3, ?M2M3, ?O2?O3?) passing between the emitting and receipt of the wave signals (l1, I2, v) and the speed of propagation of the wave signals (l1, I2, v) the distance of the second transceiver device (M) from the first transceiver device (E), and the distance of the first sensing device (O?) from the first and second transceiver devices (E, M) are determined.

Abstract: Methods and apparatus for processing of GNSS signals are presented. These include GNSS processing with predicted precise clocks, GNSS processing with mixed-quality data, GNSS processing with time-sequence maintenance, GNSS processing with reduction of position jumps in low-latency solutions, GNSS processing with position blending to bridge reference station changes, and GNSS processing with delta-phase correction for incorrect starting position.

Abstract: A servo rotary scanning system of three-dimensional holographic imaging may include a servomotor (20) having a first angle sensor (21), a second angle sensor (30), a control component (40), a servo driver (50) and a rotary frame (10), the servo rotary scanning system of three-dimensional holographic imaging is a full-closed loop servo control system, the second angle sensor (30) detects an actual rotating angle of the rotary frame (10) and feeds back a frame feedback signal to the control component (40), an instruction signal in the control component (40) is compared with the frame feedback signal to generate a following error, the first angle sensor (21) detects an output rotating angle of the servomotor (20) and feeds back a motor feedback signal to the servo driver (50), and the servo driver (50) controls the servomotor (20) to rotate according to the following error and the motor feedback signal.

Abstract: The invention relates to a method in a radar system, wherein: in a first non-coherent transmitting-receiving unit (NKSE1), a first signal (sigTX1) is generated and is transmitted, in particular emitted, via a path (SP); in a further, in particular second non-coherent transmitting-receiving unit (NKSE2), a first signal (sigTX2) is generated and is sent, in particular emitted, via the path (SP); in the first transmitting-receiving unit (NKSE1), a comparison signal (sigC12) is formed from the first signal (sigTX1) of the first transmitting-receiving unit and from such a first signal (sigTX2) received from the further transmitting-receiving unit (NKSE2) via the path (SP); and in the further transmitting-receiving unit (NKSE2), a further comparison signal (sigC21) is formed from the first signal (sigTX2) of the further transmitting-receiving unit and from such a first signal (sigTX1) received from the first transmitting-receiving unit (NKSE1) via the path (SP), wherein the further comparison signal (sigC21) is tra

Abstract: In a direction estimator, a horizontal array maximum likelihood estimator calculates first maximum likelihood values corresponding to NW angles in a first direction by performing a maximum likelihood estimation process on the first direction using signals received by a first virtual linear array and extracts first candidate angles of arrival of incoming waves in the first direction. A vertical array maximum likelihood estimator calculates second maximum likelihood values corresponding to the NW angles in a second direction by performing a maximum likelihood estimation process on the second direction using signals received by a second virtual linear array and extracts second candidate angles of arrival of incoming waves in the second direction. A horizontal/vertical maximum likelihood estimator estimates, using the first and second candidate angles of arrival, angles of arrival of the NW incoming waves in a two-dimensional plane extending in the first and second directions.

Abstract: A measurement setup for measuring attenuation through an irregular surface of a device under test is described. The measurement setup comprises a positioning system, a reference reflector having a collection of diffuse scattering members, and a three dimensional imaging system. The measurement setup has a reference state and a measurement state, wherein respective images are taken in the different states. The imaging system is configured to compare the images taken in the reference state and the measurement state to determine the attenuation of the device under test. Further, a reference reflector as well as a method for measuring attenuation are described.

Abstract: In one embodiment, a method includes receiving a first, a second, and a third sensing events within a same beacon message interval from a mobile device, each sensing event including a beacon device identifier associated with a beacon device and a timestamp associated with a respective beacon message, a location of the mobile device, and a power level associated with the respective beacon message, determining a first, a second, and a third distances between the mobile device and the beacon device based on the first, the second, and the third sensing events, and determining a position of the beacon device based on the first, the second, and the third distances.

Abstract: A radar level indicator comprising a processor, an analogue-digital converter circuit and an intermediate memory connected therebetween. The intermediate memory is configured to receive digital signals from the analogue-digital converter circuit at a first data rate. The processor is configured to read out the intermediate memory at a second data rate that is different from the first data rate. It is thus possible to reduce the transmission time while maintaining the same energy requirement.

Abstract: A computer-implemented method includes: determining, based on a video of a target area, a first number of target objects in the video at each of multiple time points, and a first location of each of the first number of target objects at the corresponding time points; receiving position signals of the corresponding target objects in the target area at each of the multiple time points; determining, based on the position signals, a second number of target objects at each of the multiple time points and a second location of each of the second number of target objects at the corresponding time points; determining that, at each of the multiple time points, the first number equals the second number; determining that, at each of the multiple time points, the first location of each target object matches the second location of the target object; and determining that the video is unmodified.

Abstract: A shared aperture antenna array including an array of antennas is disclosed. Elements of neighboring antennas are shared to create additional antennas. The shared elements include radiating patches and apertures. Each antenna shares an aperture with neighboring antennas. The array of antennas may be linear or two-dimensional. A phase shifting network with single-pole-single-throw reflective switches may be coupled to the antennas.

Abstract: A radar system includes a plurality of radiating elements configured to radiate electromagnetic energy and a plurality of feed waveguides defining a common plane and configured to guide electromagnetic energy to the plurality of radiating elements. The radar system also includes a plurality of waveguides arranged as a dividing network. The dividing network is also configured to split the electromagnetic energy from the source among the plurality of feed waveguides, such that each feed waveguide receives a respective portion of the electromagnetic energy. Additionally, the dividing network is configured to adjust a phase of the electromagnetic energy received by each waveguide. The splitting and adjusting of the dividing network may be based on differences in width between the waveguides of the dividing network and the feed waveguides. The dividing network of waveguides is located in the common plane of the feed waveguides.

Abstract: A method for determining spin of a projectile is disclosed that includes generating an electromagnetic radar signal and transmitting the electromagnetic radar signal towards a projectile, receiving a reflected electromagnetic radar signal from the projectile and transforming the reflected electromagnetic radar signal from a time domain to a frequency domain to generate a frequency domain signal. A peak frequency component of the frequency domain signal is identified, shoulder frequencies adjacent to the peak frequency component in the frequency domain signal are identified, and an estimate of the spin of the projectile as a function of the shoulder frequencies is generated.

Abstract: The present invention relates to a system for position detection, implementing RF-based distance measurement, the system comprising at least one transmitting unit (12) arranged for transmitting an electromagnetic wave signal in the RF range, at least one receiving unit (14) arranged for receiving an electromagnetic wave signal in the RF range, wherein the transmitting unit (12) is arranged to transmit an electromagnetic wave signal specifically formed for distance measurement, and wherein the receiving unit (14) is arranged to receive the electromagnetic wave signal transmitted by the transmitting unit (12) in a direct or mediate fashion, at least one control device (30) for distance measurement based on transmitted signal information and received signal information, the control device (30) further comprising a distance measurement quality assessment unit (32), and a power consumption optimizing unit (34), wherein the distance measurement quality assessment unit (32) is arranged to derive a distance measureme

Abstract: An electronic device includes M separate radar transmitters and N separate radar receivers co-located in the electronic device, where the M radar transmitters and the N radar receivers are arranged in a circular architecture providing 360° coverage in a horizontal plane. Moreover, the N radar receivers are synchronized, e.g., using a clock signal. During operation, subsets of the M radar transmitters sequentially transmit radar signals and, when a given subset of the M radar transmitters is transmitting, at least a subset of the N radar receivers performs radar measurements. Furthermore, at least the subset of the N radar receivers can perform the radar measurements using circular beamforming. Based at least in part on the radar measurements, the electronic device determines a location of an object in an environment around the electronic device, where the location includes a range and an angular position.

Abstract: Methods and apparatus for detecting presence of an object in an environment, the method including receiving a Doppler signal during a frame, filtering the Doppler signal in a frequency band, determining a signal energy of the filtered Doppler signal in time domain, determining whether motion of the object is detected in accordance with the Doppler signal and a baseline energy, responsive to a determination that motion of the object is detected in accordance with the signal energy and the baseline energy, setting a flag of object presence, and responsive to a determination that motion of the object is not detected in accordance with the Doppler signal, updating the baseline energy in accordance with the signal energy.