Abstract: A real-time automotive radar simulation tool is developed based on reduced statistical models summarized from physical-based asymptotic and full-wave simulations. Some models have been verified with measurements. The simulation tool can help save cost and time for the automotive industry, especially for autonomous vehicles. The simulation tool can also help develop new functionalities like target identification or classification as well as help prevent false alarms.

Abstract: One-dimensional data obtained by performing a Fourier transform on a digitally converted frequency modulated continuous wave (FMCW) radar signal at every pulse repetition interval is input to a recurrent neural network (RNN) to find the probability of the existence of a target in each range index. The range indices, i.e., bit frequencies are selected based on the probability. In order to reduce the size of the RNN, windowing may be applied. In addition, a speed-index-specific coefficient value may be calculated by accumulating and performing a Fourier transform on the selected bit frequencies in which the target exists over a plurality of pulse repetition intervals. Thus, it is possible to calculate the speed of the target.

Abstract: Methods, systems, and devices for wireless communications are described. User equipment (UE), such as vehicles, may implement radar transmissions to detect and avoid potential collisions with a target such as other UE or pedestrians. A first UE may receive an indication of a location of a second UE and an indication of one or more parameters associated with radar transmission from the second UE. The first UE may also receive a radio frequency waveform that includes a first component associated with the radar transmissions from the second UE and a second component that is associated with reflected radar transmission from the first UE. The first UE may compensate for an interference from the first component based on the location of the second UE and the one or more parameters. The first UE may generate a radar image from the received radio frequency waveform based on compensating for the interference.

Abstract: Encoded information means located on an infrastructure to be decoded by sensors located on mobiles, in such a way that these means encode the position they occupy in the infrastructure and allow for a mobile travelling along the same trajectory, provided with the adequate sensor, to read, decode and transform it immediately into information on its exact position in the infrastructure and being characterised by the fact that along the same trajectory described by a mobile it is possible to encode information in the infrastructure by means of different objects presenting dielectric change boundaries or dielectric/metal boundaries at different heights or distances regarding the origin of the onboard sensor, these boundaries being interrogated by a sensor on board the mobile by means of pressure or electromagnetic waves and by measuring the time the waves take to return to the sensor, making it possible to determine the distance at which the reflections occur and in this way to extract the information.

Abstract: A method and system are provided to resolve Doppler ambiguity and multiple-input, multiple-output array phase compensation issues present in Time Division Multiplexing MIMO radars by estimating an unambiguous radial velocity measurement. Embodiments apply a disambiguation algorithm that dealiases the Doppler spectrum to resolve the Doppler ambiguity of a range-Doppler detection. Phase compensation is then applied for corrected reconstruction of the MIMO array measurements. The dealiasing processing first forms multiple hypotheses associated with the phase corrections for the radar transmitters based on a measured radial velocity of a range-Doppler cell being processed. A correct hypothesis, from the multiple hypotheses, is selected based on a least-spurious spectrum criterion. Using this approach, embodiments require only single-frame processing and can be applied to two or more transmitters in a TDM MIMO radar system.

Abstract: A system and apparatus is provided for a modular radar system. The modular radar system can include a plurality of radar system modules that can be detachably coupled and can include a configurable number of radio-frequency (RF) transmit and receive assemblies. The RF transmit and receive assemblies can include radiating element(s) that emit electromagnetic radiation. The plurality of radar system modules can also include at least one processor coupled to control power of the electromagnetic radiation and/or at least one controller to control the RF transmit and receive assembly, the power unit and the digital receiver and exciter module, at least one digital receiver and exciter to convert RF to digital in receive mode, and digital to RF in transmit mode, and/or at least one RF beamformer to generate one or more RF beams.

Abstract: The present invention relates to a device (20) for determining a radar target list, comprising: an input interface (22) for receiving preprocessed sensor data from a radar sensor (18) with information on detected strengths at high points (H1, H2) in a distance and/or velocity dimension and in predefined neighborhood ranges of the high points in the distance and/or velocity dimension; an analysis unit (24) for determining mutually adjacent high points with overlapping neighborhood ranges based on the preprocessed sensor data; an adjustment unit (26) for adjusting the neighborhood ranges of the mutually adjacent high points; and an evaluation unit (28) for determining a radar target list with information on targets (17) in a field of view of the radar sensor based on the high points and the neighborhood ranges thereof. The present invention also relates to a method for determining a radar target list and a sensor system (10) for detecting targets (17) in an environment (12) of a vehicle (14).

Abstract: In an embodiment, a method includes: receiving a global trigger with a first millimeter-wave radar; receiving the global trigger with a second millimeter-wave radar; generating a first internal trigger of the first millimeter-wave radar after a first offset duration from the global trigger; generating a second internal trigger of the second millimeter-wave radar after a second offset duration from the global trigger; start transmitting first millimeter-wave radar signals with the first millimeter-wave radar based on the first internal trigger; and start transmitting second millimeter-wave radar signals with the second millimeter-wave radar based on the second internal trigger, where the second offset duration is different from the first offset duration, and where the first and second millimeter-wave radar signals are transmitted sequentially so as to exhibit no temporal overlap.

Abstract: A method of transmitting and receiving an orthogonal frequency division multiplexing (OFDM) signal for radio detection and ranging (radar) applications, and apparatuses performing the method are disclosed. The method includes receiving an OFDM signal in which a cyclic prefix (CP) is not included and converting the received OFDM signal to a received discrete time-domain signal through an analog-to-digital converter (ADC), selecting sub-carrier symbols to be input to a fast Fourier transform (FFT) from among all sub-carrier symbols included in the received discrete time-domain signal by performing windowing on the received discrete time-domain signal by a window that is based on an estimated value of a maximum delay that occurs potentially in a channel, converting the received discrete time-domain signal to a received frequency-domain signal by inputting the selected sub-carrier symbols to the FFT, and performing channel estimation based on the received frequency-domain signal.

Abstract: Methods and apparatus to implement compact time-frequency division multiplexing for MIMO radar are disclosed. An apparatus includes an antenna array controller to: transmit a first signal via a first transmitter of a radar antenna array, the first signal having a first duration and modulated across a first frequency range; and transmit a second signal via a second transmitter, the second signal having a second duration and modulated across a second frequency range, the first and second durations including an overlapping period of time, the first and second frequency ranges including an overlapping frequency range. The apparatus further includes a signal separation analyzer to: determine a first echo received at a receiver of the radar antenna array corresponds to the first signal; and determine a second echo received at the receiver corresponds to the second signal.

Abstract: A system and method is disclosed for determining a particular vehicle state based on a UWB signal received at a plurality of receiving nodes. A plurality of channel-impulse responses (CIRs) may be computed from the UWB signal received from the plurality of receiving nodes. A plurality of peak-based features based on a selected position and amplitude may be extracted from the plurality of CIRs. A plurality of correlation-based features may be generated by correlating the plurality of CIRs to a corpus of reference CIRs relating to a plurality of vehicle states. A plurality of maximum likelihood vehicle matrices may be generated by correlating the plurality of CIRs to the corpus of reference CIRs relating to the plurality of vehicle states. The vehicle state may then be determined by processing the plurality of peak-based features and correlation-based features using the machine learning classification algorithm.

Abstract: A radar image processing device is provided for generating a radar image from a region of interest (ROI). The radar image processing device receives transmitted radar pulses and radar echoes reflected from the ROI at different positions along a path of a moving radar platform and stores computer-executable programs including a range compressor, a graph modeling generator, a signal aligner, a radar imaging generator and a focused image generator.

Abstract: The disclosure relates to determining a carrier phase shift between a first transceiver and a second transceiver, each transceiver comprising a local oscillator for generating a carrier signal, an example method for which comprises: the first transceiver generating and transmitting a first continuous wave carrier signal packet; the second transceiver receiving the first continuous wave carrier signal packet; the second transceiver calculating a first phase correction based on a comparison between the received first continuous wave carrier signal packet and a local oscillator carrier signal at the second transceiver; the second transceiver generating and transmitting a second continuous wave carrier signal packet; the first transceiver receiving the second continuous wave carrier signal packet; the first transceiver calculating a second phase correction based on a comparison between the received second continuous wave carrier signal packet and a local oscillator signal at the first transceiver; and the first t

Abstract: According to one embodiment, an antenna device comprises an antenna panel including a first transmission antenna, a first reception antenna, and a second reception antenna, and a rotation device configured to rotate the antenna panel. A first radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a first angle and a reflected radio wave of the first radio wave is received by the first reception antenna and the second reception antenna. A second radio wave is irradiated from the first transmission antenna when the rotation angle is a second angle and a reflected radio wave of the second radio wave is received by the first reception antenna and the second reception antenna.

Abstract: A radar apparatus includes a plurality of transmit antennas that transmits a plurality of transmission signals using a multiplexing transmission, and a transmission circuit that applies phase rotation amounts corresponding to combinations of Doppler shift amounts and code sequences to the plurality of transmission signals. Each of the plurality of transmission signals is assigned a different combination among the combinations. The combinations include at least one combination of different numbers of multiplexing by the code sequences.

Abstract: Aspects presented herein may enable a wireless device to perform an SL ranging based on a single-sided PRS transmission. In one aspect, a first wireless device transmits one or more reference signals to at least one RIS associated with a second wireless device. The first wireless device receives one or more reflected reference signals reflected from the at least one RIS. The first wireless device calculates a signal RTT based on the one or more reference signals and the one or more reflected reference signals. In another aspect, a second wireless device transmits, to a first wireless device, information indicating a time, a duration, or a periodicity in which at least one RIS associated with the second wireless device is to be activated. The second wireless device activate the at least one RIS based on the information.

Abstract: Agricultural detection device, having a sensor unit, an evaluation unit and a control unit. The sensor unit includes a first sensor with a first directivity and is configured to emit a first transmission signal and to receive a first reflection signal. The first sensor has a second directivity and emits a second sensor signal with the second directivity and receives a second reflection signal, or the sensor unit has a second sensor with a second directivity arranged adjacent to the first sensor for emitting the second transmission signal and for receiving the second reflection signal. The evaluation unit is configured to ascertain at least the structure of plants and a height value from the first reflection signal and the second reflection signal.

Abstract: A method measures an angle of arrival (AOA) of an incoming signal using m separate antennas coupled via a switch with a single receiving device. The switch sequentially supplies the incoming signal to the receiver. A sampling of the incoming signal as received at the antennas has a sampling rate and cycle time performed in repetitive cycles. The receiver generates baseband signals with in-phase and quadrature components from the incoming signal and forwarding to each analog-to-digital converter to provide digitized samples. A signal processor is coupled to the respective analog-to-digital converter to analyze the digitized signals and to determine the angle of arrival of the incoming signal. The resulting phase error is compensated by sampling and signal processing. A device operates according to the method and an arrangement with a mobile transmitter and a device and software for locating the mobile transmitter by the device.

Abstract: A smart radar data mining and target location corroboration system has a target incident processing system (TIPS) and target information system (TIS) that provide corroborating radar data in response to target incident data, to assist search and response personnel in responding to high-risk safety or security incidents involving an uncooperative vessel or aircraft. The TIPS rapidly mines large volumes of historical radar track data, accessible through the TIS, to extract corroborating radar data pertinent to the target incident data. The corroborating radar data include trajectories, last known radar position (LKRP) or first known radar position (FKRP) information believed to be associated with the target incident data.

Abstract: A method and a device for separating echo signals of STWE SAR in elevation are provided. The method includes that: aliasing echo signals of multiple sub-swaths are received; for a target sub-swath of the multiple sub-swaths, multiple sub-beams associated with the target sub-swath are generated, the multiple sub-beams pointing to different directions of the target sub-swath respectively, and a null of each of the multiple sub-beams being used for deep nulling suppression on echo signals of sub-swaths except the target sub-swath; and the aliasing echo signals are processed based on the multiple sub-beams and multiple nulls corresponding to the multiple sub-beams to generate a target echo signal of the target sub-swath.