Abstract: Transmission antennas are aligned at a reference distance along a preset direction of alignment. The aperture width of a first reception antenna in the direction of alignment is set to a first width which is less than the reference distance. Second reception antennas each have an aperture width in the direction of alignment set to a second width which is the first width or less and are aligned at a distance which is less than the reference distance along the direction of alignment. The distance between the position of the center of the first reception antenna and the phase center of a second reception antennal located closest to the first reception antenna among the second reception antennas is set to a length that is greater than or equal to the value obtained by multiplying the reference distance by the value obtained by subtracting 1 from the number of transmission antennas.

Abstract: A method for localizing a device. The method is performed by a communication device. The method includes measuring a phase of a signal that the communication device has received from the device, the signal having a first frequency; measuring a phase of at least one further signal that the communication device has received from the device; the at least one further signal having a second frequency, determining a phase pattern of a measured phase versus frequency, pattern matching the phase pattern with each reference phase pattern of a plurality of pre-determined reference phase patterns. Each reference phase pattern is associated with a distance between the communication device and the further communication device. The method further includes determining the distance between the further communication device and the communication device based on the pattern matching.

Abstract: A novel system that allows for 3D radar detection that simultaneously captures the lateral and depth features of a target is disclosed. This system uses only a single transceiver, a set of delay-lines, and a passive antenna array, all without requiring mechanical rotation. By using the delay lines, a set of beat frequencies corresponding to the target presence can be generated in continuous wave radar systems. Likewise, in pulsed radar systems, the delays also allow the system to determine the 3D aspects of the target(s). Compared to existing solutions, the invention, in embodiments, allows for the implementation of simple, reliable, and power efficient 3D radars.

Abstract: A distance measuring method and apparatus are provided. The distance measuring apparatus emits a transmission signal while changing a frequency over time, receives a reception signal from an object in response to the transmission signal being reflected from the object, samples a beat frequency indicating a difference between a frequency of the transmission signal and a frequency of the reception signal in a sampling range that changes based on the beat frequency, and determines a distance to the object based on the sampling.

Abstract: The methods and device disclosed herein provide electromagnetic (EM) portable device for imaging an object embedded within a medium, the device comprising an array, the array comprises at least two transducers, wherein at least one of the at least two transducers is configured to transmit a signal towards the object, and at least one transceiver attached to said at least two transducers, the at least one transceiver is configured to transmit at least one signal toward the object and receive a plurality of signals affected by the object while the array is moved in proximity to the medium; a data acquisition unit configured to receive and stare the plurality of affected signals; and a processor unit configured to provide one or more hypothetical parameter values aver a parameter space of said at least one object and provide a target model per hypothesis of said parameter values, and compute a score value per hypothesis as a function of the target model and the affected signals.

Abstract: Methods and devices for distance measuring/ranging, as well as location measurements both in 2D and 3D are presented. More specifically, the methods and devices are for determining the time of arrival of a radio frequency signal. A method of determining a time of arrival of a radio frequency signal in a receiving device as received from a transmitting device includes receiving a radio frequency signal, determining a first phase. The first phase is defined as a phase of the received radio frequency signal. The method also includes obtaining a second phase. The second phase is defined as a phase of a reference radio frequency signal. The method also includes determining the time of arrival of the radio frequency signal based on comparing the first and second phases.

Abstract: A multichannel radar system comprising a set of antennas each receiving a sequence of chirps reflected from plurality of objects, a range detector generating a set of range bins for each chirp, a beam former operative to generate a set of dominant frequency components from a group of range bins picked from the set of range bins across the set of antennas, a nearness detector for separating the set of dominant frequencies into a first set of dominant frequencies and a second set of dominant frequencies, a frequency subtractor configured to shift the each dominant frequency in the first set of dominant frequencies by its phase by a first value to form a third set of phase shifted dominant frequencies, and a Doppler estimator estimating a Doppler frequency of the each dominant frequency in the set of dominant frequencies from the third set of phase shifted dominant frequencies and the second set of dominant frequencies.

Abstract: An autonomous driving assembly for a vehicle includes a plurality of lidar units configured to be supported by a vehicle body. The lidar units are collectively configured to detect a periphery region in proximity to the vehicle body to aid in autonomous driving upon coupling the driving assembly to the vehicle body. Each of the plurality of lidar units has a field of view of less than about 180 degrees.

Abstract: An object detection system comprises a first object detection unit detecting an object from a first radio frequency (RF) signal data comprising first set of characteristics representing a first object, a second object detection unit detecting the object from an optical image data and a calibration unit calibrating the first RF signal data from the optical image data, in that, the second object detection unit and the first object detection unit are aligned to detect the object in a first region.

Abstract: A digitally implemented radio frequency sensor for physiology sensing may be configured to generate oscillation signals for emitting radio frequency pulses for range gated sensing. The sensor may include a radio frequency transmitter configured to emit the pulses and a receiver configured to receive reflected ones of the emitted radio frequency pulses under control of a microcontroller. The received pulses may be processed by the microcontroller to detect physiology characteristics such as motion, sleep, respiration and/or heartbeat. The microcontroller may be configured to generate timing pulses such as with a pulse generator for transmission of radio frequency sensing pulses. The microprocessor may sample received signals, such as in phase and quadrature phase analogue signals, to implement digital demodulation and baseband filtering of the received signals.

Abstract: The disclosure provides a radar apparatus for estimating a position and a velocity of a plurality of obstacles. The radar apparatus includes a slave radar chip. A master radar chip is coupled to the slave radar chip. The master radar chip includes a local oscillator that generates a transmit signal. The slave radar chip receives the transmit signal on a first path and sends the transmit signal back to the master radar chip on a second path. A delay detect circuit is coupled to the local oscillator and receives the transmit signal from the slave radar chip on the second path and the transmit signal from the local oscillator. The delay detect circuit estimates a routing delay from the transmit signal received from the slave radar chip on the second path and from the transmit signal received from the local oscillator.

Abstract: Provided are a UWB high-precision positioning system, a positioning method and apparatus, and a computer readable medium. The positioning system comprises at least one UWB positioning signal transmitter group, and at least one central controller for controlling the synchronization of the UWB positioning signal transmitter group. Each UWB positioning signal transmitter group comprises N UWB positioning signal transmitters, where N is an integer equal to or greater than three. Wireless communication is realized between any two UWB positioning signal transmitters and between any UWB positioning signal transmitter and the central controller. The positioning system further comprises at least one positioning terminal. The positioning terminal is used for receiving a UWB positioning signal sent by each UWB positioning signal transmitter. Wireless communication is realized between the positioning terminal and the central controller.

Abstract: A vehicle radar system having a signal generator (13) that generates a FMCW chirp signal (4) with a plurality of frequency ramps (r) running between a first frequency (fstart) and a second frequency (fstop). At the second frequency (fstop), the signal generator (13) is controlled to output an output signal (4) with an output frequency (Fout) for initializing a further frequency ramp (r?) using a frequency control signal (31) corresponding to a desired frequency (39) with an initial desired frequency part (39a) and at least one further desired frequency part (39b). The initial desired frequency part (39a) runs from the second frequency (fstop) to an intermediate frequency (fi) between the first and second frequency (fstart, fstop)), and the further desired frequency part (39b) runs from the intermediate frequency (fi) to the first frequency (fstart). The duration of the initial desired frequency part (39a) falls below the duration of the further desired frequency part (39b).

Abstract: An antenna-integrated module includes: one or more semiconductor chips each including a silicon substrate, a metal layer stacked on a first surface of the silicon substrate, and one or more frequency converters; an insulating layer that surrounds the one or more semiconductor chips; a re-distribution layer that is stacked on a first surface of the insulating layer and on a first surface of the metal layer; one or more first antenna elements that are provided on the first surface of the metal layer with a first conductor pattern and that are connected to the one or more frequency converters; and one or more second antenna elements that are provided with a second conductor pattern on a first surface of the re-distribution layer stacked on the first surface of the insulating layer and that are connected to the one or more frequency converters.

Abstract: A radar system includes a transmitter to transmit a sequence of pulses, a receiver to receive reflections of the transmitted pulses, and velocity detection circuitry to determine a velocity of an object in a path of the transmitted pulses based at least in part on the transmitted pulses and the reflected pulses. The transmitter includes a plurality of digital-to-analog converters (DACs) to generate the sequence of pulses in response to a clock signal. The receiver includes a plurality of analog-to-digital converters (ADCs) to sample the reflected pulses in response to the clock signal. Accordingly, the ADCs are locked in phase with the DACs.

Abstract: An apparatus, system, and method for calibrating an electromagnetic sensor of a vehicle. Calibration is performed by positioning a calibration apparatus at known positions relative to the electromagnetic sensor of the vehicle, and taking measurements with respect to each known position. The calibration apparatus disclosed herein further comprises adjustable components.

Abstract: A dual vertical beam cellular array is disclosed herein. In one embodiment, a cellular array includes discrete radiators coupled in pairs and arranged in-line. The radiators are connected to hybrid couplers configured to sum the output from the pairs of discrete radiators. A first power distribution network is configured to receive a first output from the hybrid couplers and produce a first beam, and a second power distribution network configured to receive a second output from the hybrid couplers and produce a second beam. According to some embodiments, the first beam is a main beam with high gain and the second beam is a coverage beam with a large coverage area.

Abstract: Microwave and millimeter wave imaging. An antenna array in communication with a signal source comprises a plurality of antennas by which a signal generated by the signal source is transmitted incident to an object located remotely from the antenna array and by which a signal reflected from the object is received by the antenna array. The signals transmitted by the antennas collectively have an effective electric field resembling a plane-wave within a target region in front of the antenna array. A plurality of detectors each connected to one of the antennas is configured to simultaneously receive the reflected signal and provide an output signal representative thereof. An image processor configured to execute an imaging algorithm generates a multi-dimensional profile representative of the object based on the output signals from the detectors.

Abstract: Systems, devices, and methods for a vertical take-off and landing (VTOL) aerial vehicle having a first GPS antenna and a second GPS antenna, where the second GPS antenna is disposed distal from the first GPS antenna; and an aerial vehicle flight controller, where the flight controller is configured to: utilize a GPS antenna signal via the GPS antenna switch from the first GPS antenna or the second GPS antenna; receive a pitch level of the aerial vehicle from the one or more aerial vehicle sensors in vertical flight or horizontal flight; determine if the received pitch level is at a set rotation from vertical or horizontal; and utilize the GPS signal not being utilized via the GPS antenna switch if the determined pitch level is at or above the set rotation.

Abstract: A method of operating a frequency modulated continuous wave (FMCW) radar system includes receiving, by at least one processor, digital intermediate frequency (IF) signals from a mixer coupled to a receive antenna. The method also includes computing, by the at least one processor, a motion metric based on the digital IF signals; operating, by the at least one processor, the FMCW radar system in a classification mode, in response to determining that the motion metric is above a threshold; and operating, by the at least one processor, the FMCW radar system in a detection mode, in response to determining that the motion metric is below the threshold for at least a first amount of time. An amount of power consumed by the FMCW radar system in the detection mode is less than an amount of power consumed by the FMCW radar system in the classification mode.