Abstract: A positioning method, system and device, a storage medium, and a program product are disclosed. The positioning method may include: acquiring parameter information of at least two Reconfigurable Intelligent Surfaces (RISs) and parameter information of a base station; acquiring first time information and second time information, the first time information is information representing a time difference between a time point at which the base station sends a first positioning signal and a time point at which the base station receives a second positioning signal, and the second time information is information representing a time difference between a time point at which a terminal device sends the second positioning signal and a time point at which the terminal device receives the first positioning signal; and obtaining location information of the terminal device.

Abstract: In a radar apparatus, a processing unit calculates a wavenumber of incoming waves reflected from a target object for each of detected target objects. The processing unit calculates, as a wavenumber evaluation value, a proportion of target objects of which the calculated wavenumber is plural among the all of the detected target objects. The processing unit calculates, as a false azimuth evaluation value, a proportion of target objects including a second incoming wave of which an azimuth difference relative to an azimuth of a first incoming wave of which power of the incoming wave is maximum power is a specific azimuth difference occurring due to periodic signal errors being superimposed on the virtual array, among the target objects of which the calculated wavenumber is plural. The processing unit determines contamination of the radome based on the wavenumber evaluation value and the false azimuth evaluation value.

Abstract: A method can include receiving a B-Scan image for a scanned region generated using a non-destructive testing (NDT) scanner, determining a sub-image window based upon a physical distance scale associated with the scanned region, determining a stride distance based upon a dimension of interest of the scanned region, overlapping the sub-image window with a first portion of the B-Scan image to define a first B-Scan sub-image, sliding the sub-image window from the first portion of the B-Scan image to a second portion of the B-Scan image based upon the stride distance to define a second B-Scan sub-image and providing at least one of the first B-Scan sub-image and the second B-Scan sub-image.

Abstract: A system for digital data packet communications for an in-vehicle speed enforcement system, comprising a first antenna configured to transmit a first radar signal and to receive a first reflected signal, a second antenna configured to transmit a second radar signal and to receive a second reflected signal, the first antenna coupled to the second antenna and configured to generate synchronized waveform data and a radar engine system configured to receive the synchronized waveform data and to generate a synchronization command.

Abstract: The present disclosure provides a radar layout method applied to bird invasion detection, including the following steps: dividing an environment to be laid out into regions, acquiring environment parameters of each region, and setting radar layout parameters of each region; determining a key region of bird invasion by means of calculation according to the environment parameters of each region, and determining a radar layout evaluation value for each region by means of calculation according to the radar layout parameters of each region; determining, based on the key region of bird invasion and the radar layout evaluation value for each region, a radar layout region to be optimized; and determining a fitness function of a genetic algorithm based on the radar layout parameters of the radar layout region to be optimized, and performing genetic algorithm iteration by using the fitness function until a preset optimization condition is reached.

Abstract: The techniques described herein relate to a method of detecting an object in an environment using a system including a server and a set of transceivers. A first set of signals is transmitted and received by the set of transceivers, and processed to determine a background for an environment. A second set of signals is transmitted from the set of transceivers, all or a portion of the second set of transmitted signals are reflected off of an object of interest (OOI), and the reflected signals are received by the set of transceivers and processed to determine a first estimated location of the OOI by detecting a change between the first set of received signals and the first set of reflected signals. If the first estimated location is determined to be a reported location of the OOI then it is reported as a reported location to a system.

Abstract: A radar system for a vehicle includes: a processing device having multiple transmit outputs and multiple receive inputs; a main transmit antenna to transmit main radar waves essentially parallel to a road, and coupled to the processing device via a first transmit output; a main receive antenna to receive reflections of the main radar waves off objects, and coupled via a first receive input; a first street condition monitoring (SCM) transmit antenna to transmit first polarized radar waves essentially directed to the road at a first polarization, and coupled via a second transmit output; and a first SCM receive antenna to receive, at the first polarization, reflections of the polarized radar waves off the road, and coupled via a second receive input. The system can include second SCM transmit and receive antennas coupled via a third transmit output and a third receive input and operating at a second polarization.

Abstract: In implementations of signal processing for OFDM radar systems, an OFDM transceiver of an ISAC system is operated in full-duplex mode in a downlink communication phase. The ISAC system generates sensing symbols for an OFDM radar system by combining OFDM communication symbols and repetitions of the OFDM communication symbols as the sensing symbols. The OFDM transceiver attenuates subcarriers of received sensing symbols for processing by the OFDM radar system to increase a signal-to-noise ratio of the received sensing symbols.

Abstract: A radar system for a vehicle includes: at least one main transmit antenna configured to transmit main radar waves essentially parallel to a road on which the vehicle is standing or driving; at least one main receive antenna configured to receive reflections of the main radar waves off objects on the road; a first street condition monitoring, SCM, transmit antenna configured to transmit first polarized radar waves essentially directed to the road at a first polarization; a second SCM transmit antenna configured to transmit second polarized radar waves essentially directed to the road at a second polarization different from the first polarization; a first SCM receive antenna configured to receive, at the first polarization, reflections of the polarized radar waves off the road; and a second SCM receive antenna configured to receive, at the second polarization, reflections of the polarized radar waves off the road.

Abstract: A system for testing an emitting sensor of a vehicle is provided. Said system comprises a tester for testing the sensor, e.g. by simulating a target for the sensor's emission, and a holding arrangement, especially a holder, for holding the tester. In this context, the holding arrangement is adapted to be mounted on the vehicle and to hold the tester at a certain distance in front of the sensor.

Abstract: Systems and techniques are described herein for operating an apparatus having a geometric algebra transformer. An apparatus to predict link properties between a transmitter and a receiver in a three-dimensional space can include one or more processor; and a computer-readable medium storing instructions which, when executed by the one or more processor, cause the one or more processor to be configured to: receive a three-dimensional geometry, a transmitter position and a receiver position; and predict, based on a neural network wireless channel model, network link properties related to one or more channel between the transmitter position and the receiver position. Other tasks can be performed as well such as inferring wall position and/or orientation in the three-dimensional geometry based on a map of reference signal received power in a portion of the three-dimensional geometry.

Abstract: Disclosed is a compact phase shifter board for an antenna. The phase shifter board has at least one drive shaft having a drive bracket. The drive bracket has two slots oriented perpendicularly to the drive shaft. Each slot configured to engage with a drive pin of a first geared wiper arm such that translation motion of the drive shaft causes the first geared wiper arms to rotate. Each geared wiper arm has a first gear that engages with a second gear of a second geared wiper arm. The first and second gears and configured so that any rotational motion of the first geared wiper arms causes the corresponding second geared wiper arm to rotate in conjunction.

Abstract: Imaging systems and associated methods are described. According to one aspect, an imaging system includes processing circuitry configured to: access radar data for a plurality of sampling points at a plurality of different locations of an imaging aperture, and wherein the radar data results from the transmission and reception of electromagnetic energy via an antenna array with respect to a target imaging volume; access a plurality of different weightings that correspond to different ones of the sampling points of the imaging aperture; focus the radar data of the sampling points to generate an image of the target imaging volume; and wherein the processing circuitry is configured to use the different weightings of the sampling points to focus the radar data of respective ones of the sampling points.

Abstract: The present disclosure relates to a radar system featuring a reduced radio cross-section (RCS). This is achieved by providing a radar system comprising one or more antenna structures and a spatially modulated surface structure, wherein the spatially modulated surface structure is configured to generate, from incident radar waves, a first portion of reflected waves and a second portion of reflected waves, wherein the first portion of reflected waves is out of phase in relation to the second portion of reflected waves.

Abstract: A system emulates multipath effects of a radar signal transmitted by a radar and reflected from an emulated target and an emulated surface. The system includes RTSs configured to generate and transmit emulated echo signals having different phases in response to the radar signal, where a first RTS is configured to emulate the emulated target, receiving the radar signal via a direct path, and at least one second RTS is configured to emulate at least one ghost target corresponding to the emulated target; and a controller configured to control the RTSs to generate and transmit the emulated echo signals at the different phases, which correspond to the RTSs receiving the radar signal from the radar transmitter and the radar receiver receiving the emulated echo signals from the RTSs over different combinations of the direct the indirect paths to replicate interference effects caused by multipath propagation.

Abstract: A measuring system and a corresponding measuring method for reliably determining a fill level of a filling material in a container comprises a radar-based measuring device having a transmission unit via which high-frequency signals can be transmitted towards the filling material and received as received signals after reflection on the filling material surface; furthermore having a signal generation unit which generates the high-frequency signal to be transmitted; and having a receiving unit which records the received signal. In an evaluation unit of the measuring system, a machine learning algorithm is designed such that the fill level can be detected on the basis of the received signal. By the machine learning algorithm, received signals which are recorded under complex measuring conditions such as interference and multiple reflections can be interpreted much more reliably.

Abstract: Techniques for determining false positive detections in sensor data to remove such data from use in vehicle control operations are described. For an individual sensor detection, the system determines whether a difference between primary and secondary error values for one or more measurements is sufficient and, if so, the sensor detection is considered a true positive. If the error difference is insufficient, the system determines if the sensor detection correlates with a sufficient number of true positive sensor detections, and if so, the sensor detection is designated a true positive. If not, the sensor detection is a false positive and is removed from use in further operations, such as vehicle control operations.

Abstract: A method for detecting an object includes providing respective spatial coordinates relating to a multiplicity of reflection signals of a frame of a radar sensor system and providing a measurement attribute of a first portion of the multiplicity of reflection signals. The respective spatial coordinates of the multiplicity of reflection signals are transformed into an occupancy grid. An occupancy grid is generated with the multiplicity of reflection signals being spatially represented in the occupancy grid by mapping the respective spatial coordinates of the multiplicity of reflection signals in the occupancy grid and assigning the respective first measurement attribute of the multiplicity of reflection signals to the spatial representation of the multiplicity of reflection signals. An input tensor is generated using the occupancy grid for a trained neural network for detecting the at least one object. The object is detected using the input tensor and the trained neural network.

Abstract: A detection system includes a phased array antenna having unitary radiating elements, the system being suitable for, in each cycle, successively directing, by way of the successive application of a first and a second determined phase law to the electrical signals for supplying power to the array antenna, the antenna radiation towards a first target area (Z1), then a second target area (Z2), which is separate from the first target area (Z1), and determining an image of each target area (Z1) on the basis of the echoes received from each of the first and second target areas.

Abstract: A system is provided for measuring a power radiated pattern of an incident radio frequency (RF) signal indicating spatial distribution characteristics of a device under test (DUT). The system includes multiple antenna elements arranged in an array, where the antenna elements include antennas and diodes coupled to the antennas, respectively. Each antenna has a radar cross-section (RCS) that is too small for the antenna elements to operate in a reflect mode. Each diode is zero biased, such that the diodes receive the incident RF signal through the antennas to which the diodes are respectively coupled, and rectify the incident RF signal to DC voltages that are proportional to power of the incident RF signal, enabling the antenna elements to operate in a detect mode.