Abstract: In various embodiments of the invention, inductive coupling can be to a secondary coil rather than a primary coil in order to optimize the topology of the NMR probe. In addition, by coupling to a secondary coil using a detection coil located below the lower insulator the RF homogeneity and signal to noise can be improved together with the NMR probe topology. By effecting inductive coupling to an inductor in a multiple resonance circuit, rather than to the sample inductor parameters associated with the NMR, probe construction can be arranged to increase RF homogeneity and signal to noise, while reducing space utilization constraints. In various embodiments of the invention, the primary mode in a secondary coil can be split into two modes with a resonator with inductive coupling to the secondary coil.

Abstract: A method for cooling an MRI apparatus and an MRI apparatus are provided. The MRI apparatus comprises a magnet, a primary cooling device and a secondary cooling device. The primary cooling device is in contact with the magnet and the secondary cooling device separately. The method comprises continuously monitoring the pressure of the magnet; turning off the secondary cooling device if the pressure is greater than or equal to a first preset pressure, less than a second preset pressure and in a rising state. The method and MRI apparatus can save electricity, and since the use duration of the secondary cooling device is also reduced, the lifespan of the secondary cooling device is prolonged, thus saving costs.

Abstract: Embodiments can provide a method for multi-banded RF-pulse enhanced magnetization imaging, the method comprising determining, by a processor, a frequency offset against a central frequency by specifying an offset frequency for one or more RF coils close to a frequency peak of mobile water; and simultaneously applying, by one or more RF coils, one or more bands of Gaussian RF pulses around the central frequency to a patient from a medical imaging device; wherein the one or more bands of Gaussian RF pulses are symmetrically applied having a distance from the central frequency equal to the frequency offset.

Abstract: In beta emission imaging, magnetic lensing allows a lower resolution detector to detect the spatial distribution of emissions at a higher resolution. The sample is placed in a magnetic field with field lines at a given density, and the detector is placed away from the sample where the magnet field lines diverge, resulting in a lesser density. Since the beta emissions travel along the field lines, the divergence of the field lines from the sample to the detector result in lensing or magnification. Using positron attenuation tomography to detect annihilation in the detector allows for correction due to self-absorption by the sample. The correction and lensing are used together or may be used independently.

Abstract: In beta emission imaging, magnetic lensing allows a lower resolution detector to detect the spatial distribution of emissions at a higher resolution. The sample is placed in a magnetic field with field lines at a given density, and the detector is placed away from the sample where the magnet field lines diverge, resulting in a lesser density. Since the beta emissions travel along the field lines, the divergence of the field lines from the sample to the detector result in lensing or magnification. Using positron attenuation tomography to detect annihilation in the detector allows for correction due to self-absorption by the sample. The correction and lensing are used together or may be used independently.

Abstract: In a magnetic resonance imaging method and apparatus for generating a number of image data sets of an image recording region of an examination object, at least one set of reference magnetic resonance raw data is acquired from the image recording region. Furthermore, a number of magnetic resonance raw data sets are acquired temporally sequentially. At least some of the magnetic resonance raw data sets are recorded with an SMS image recording sequence and a number of image data sets are reconstructed on the basis of the acquired magnetic resonance raw data sets. A number of SMS image data sets are each reconstructed on the basis of one of the magnetic resonance raw data sets recorded with an SMS image recording sequence, and each on the basis of one and the same set of reference magnetic resonance raw data.

Abstract: In an imaging method using k space low-frequency region data including a lot of useful information, in order to obtain an image with high quality without increasing measurement time by measuring a minimum required region in proper quantities, according to the present invention, pre-measurement is performed prior to main measurement, a rough shape of k space low-frequency region data is measured with respect to each signal reception channel, so as to be set as k space characteristics, and a range measured as a k space low-frequency region is specified in the measurement. The specified result is reflected in an imaging sequence, and thus k space low-frequency region data including useful information which can be used for a process is appropriately collected.

Abstract: A magnetic resonance vessel wall imaging method and device. The method comprises: applying a set pulse sequence into an imaging region, wherein the set pulse sequence comprises, in chronological order, a Delay Alternating with Nutation for Tailored Excitation (DANTE) pulse train, a variable flip angle train of a three-dimensional fast spin echo (SPACE), and a flip-down pulse train (S110); acquiring a magnetic resonance signal generated in the imaging region, and reconstructing a magnetic resonance images of the vessel wall in the imaging region according to the magnetic resonance signal (S120). By adding the flip-down pulse train behind the variable flip angle train of the three-dimensional fast spin echo (SPACE), the cerebrospinal fluid signals of the whole brain can be further suppressed effectively and uniformly, and the DANTE pulse train promotes the vessel wall imaging of the head and neck jointing portion.

Abstract: A method for magnetic resonance imaging suppresses off-resonance gradient-induced image artifacts due to metal. The method includes performing by a magnetic resonance imaging (MRI) apparatus two multi-spectral imaging (MSI) acquisitions within a field of view of the MRI apparatus, where the two MSI acquisitions have alternating-sign readout gradients. The two MSI acquisitions are then processed and combined by the MRI apparatus using a weighted image combination to produce a final image.

Abstract: A medical imaging phantom (18) is three-dimensionally printed (36). In one specific approach, three-dimensional printing (36) allows for any number of variations in phantoms (18). A library of different phantoms (18), different inserts, different textures, different densities, different organs, different pathologies, different sizes, different shapes, and/or other differences allows for defining a specific phantom (18) as needed. The defined phantom (18) is then printed (36) for calibration or other use in medical imaging.

Abstract: A ferromagnetic resonance (FMR) measurement system is disclosed with a waveguide transmission line (WGTL) connected at both ends to a mounting plate having an opening through which the WGTL is suspended. While the WGTL bottom surface contacts a portion of magnetic film on a whole wafer, a plurality of microwave frequencies is sequentially transmitted through the WGTL. Simultaneously, a magnetic field is applied to the contacted region thereby causing a FMR condition in the magnetic film. After RF output is transmitted through or reflected from the WGTL to a RF detector and converted to a voltage signal, effective anisotropy field, linewidth, damping coefficient, and/or inhomogeneous broadening are determined based on magnetic field intensity, microwave frequency and voltage output. A plurality of measurements is performed by controllably moving the WGTL or wafer and repeating the simultaneous application of microwave frequencies and magnetic field at additional preprogrammed locations on the magnetic film.

Abstract: The present invention discloses a calibration device of vector network analyzers implemented by means of SIC, ESIW and microstrip technology. The calibration device of the present invention has the special characteristic of being a modular device comprising connection modules (5) which are connected, on the one hand, to the vector analyzers and, on the other hand, to calibration modules (which may be SIC, ESIW or microstrip modules). This modular configuration allows that the noises intrinsic to the connection with the analyzer (including transfers to microstrip, SIC, etc.) are the same in all calibration measurements, making it possible to detect and/or eliminate the noises associated to said connection.

Abstract: According to examples of the presently disclosed subject matter, there is provided a system for estimating a source location of a projectile, comprising an optics an optics subsystem, a radar subsystem and a processor. The processor is adapted to use range and velocity measurements obtained from data provided by the radar subsystem, a source direction and an event start time obtained from data provided by the optical subsystem and a predefined kinematic model for the projectile for estimating a range to a source location of the projectile.

Abstract: An example apparatus uses a transceiver to determine a first attribute value of a first RF signal received through a first antenna during a first period. An attribute estimator determines a second attribute value of the first RF signal received through a second antenna during the first period. Responsive to a control signal, the apparatus switches the attribute estimator from being coupled to the second antenna to being coupled to a third antenna. The apparatus then uses the transceiver to determine a first attribute of a second RF signal received through the first antenna during a second period and uses the attribute estimator determine a second attribute of the second RF signal received through the third antenna during the second period. The apparatus then can estimate an angle of arrival associated with the first and second RF signals based on the first and second attributes of the first RF signal and the first and second attributes of the second RF signal.

Abstract: A method of position and motion detection with packet communication for a first radio node of a wireless communication system is disclosed. The method comprises periodically receiving at least a data packet from at least a second radio node of the wireless communication system, wherein the data packet includes an identity corresponding to the second radio node, measuring a RF power of the received data packet, establishing a detection table including the periodically measured RF powers and the corresponding identity of the received data packet, and determining an object is moving between the first radio node and the second radio node when detecting a RF power change between the currently measured RF power and the previously measured RF power according to the detection table.

Abstract: In an embodiment of the present invention, a GraphSLAM-like algorithm for signal strength SLAM is presented. This algorithm as an embodiment of the present invention shares many of the benefits of Gaussian processes yet is viable for a broader range of environments since it makes no signature uniqueness assumptions. It is also more tractable to larger map sizes, requiring O(N2) operations per iteration. In the present disclosure, an algorithm according to an embodiment of the present invention is compared to a laser-SLAM ground truth, showing that is produces excellent results in practice.

Abstract: A positioning system, method, and apparatus relate to the communications field in order to improve positioning precision. The system includes a preset anchor set, a positioning server, and at least one positioning terminal. A distance between the at least one positioning terminal and a to-be-positioned terminal falls within a preset range. The at least one positioning terminal is configured to receive an instruction message, and execute a positioning packet interaction procedure with at least one anchor in the preset anchor set according to the instruction message. The interaction procedure enables the positioning terminal or the anchor executing the interaction procedure to obtain positioning support information. The positioning server is configured to receive the positioning support information, and position the to-be-positioned terminal according to the positioning support information.

Abstract: A method for improving direction finding and geolocation error estimation in direction finding and geolocation systems is disclosed. The corresponding phases of the received signals are determined. After an initial target estimation point of the received signals has been identified, the initial target estimation point is projected onto the earth's surface. A search grid having multiple grid points is then overlaid on the projected initial target estimation point, surrounding the projected initial target estimation point. The phase of signals emitting from a theoretical emitter located at each of the grid points of the search grid is estimated. Correlation coefficients between the estimated phases of the emitting signals and the determined phases of the received signals are determined. An error ellipse can be generated around one of the grid points having the highest correlation coefficient, and a source emitter is likely to be located within the error ellipse.

Abstract: An antenna control method, communications positioning apparatus and computer storage medium is provided. The method is used in a communications positioning apparatus. The communications positioning apparatus comprises a communications antenna and a rotation device. The communications antenna comprises at least two antennas. The rotation device drives the communications antenna to rotate, wherein the method comprises: acquiring a first command, wherein the first command turns on a positioning mode; in response to the first command, acquiring angle information corresponding to the communications antenna and a beacon; in accordance with the angle information, determining corresponding rotation parameters of the rotation device, wherein the rotation parameters comprise at least a rotation direction and a rotation angle; and in accordance with the rotation parameters, controlling the rotation device to drive the rotation direction and rotation angle corresponding to the communications antenna.

Abstract: The present invention provides a position estimation apparatus, a position estimation system, and a position estimation method that can estimate, with high accuracy, the position of a wireless device, the position of which is unknown, as well as a recording medium for position estimation.

Abstract: A radar device is equipped with a radar emitting section, a radar input section, a detector, and a cover. The radar emitting section radiates an electromagnetic wave. The radar input section receives a return of the electromagnetic wave from an object. The detector works to detect the object using the return of the electromagnetic wave inputted to the radar input section. The cover covers an object portion that is at least one of the radar emitting section and the radar input section. The cover is designed to have a convex lens formed on a portion of the cover through which the electromagnetic wave passes to the object portion. The cover is made in the form of a radome. The structure of such a radome serves to decrease the power consumption of the radar device.

Abstract: An antenna device according to an embodiment of the present invention comprises a plurality of antenna arrays, wherein the antenna array comprises: a power feeding part; and a plurality of radiators disposed to be spaced apart from the power feeding part, wherein the plurality of antenna arrays are alternately disposed from each other so that the spacing between the phase centers of the radiators is ?/2 or less.

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: The present disclosure relates to exemplary embodiments of radar systems for providing increased robustness against radar interference transmissions and methods for controlling such radar systems. The radar system comprises at least one radar antenna configured at least for receiving a radar signal, a radar signal dividing means, a first receiver device and a second receiver device. The first receiver device is configured for monitoring a first frequency range and the second receiver device is configured for monitoring a second frequency range, wherein the second frequency range is wider than the first frequency range and the first frequency range is a subset of the second frequency range. The second receiver device is configured for measuring interference levels within the second frequency range.

Abstract: The present technology relates to a signal processing apparatus, a signal processing method, and a program that enable calibration with high precision.

Abstract: An illustrative example embodiment of a detector device, which may be useful on an automated vehicle, includes a multiple-dimensional array of detectors including a plurality of first detectors aligned with each other in a first direction and a plurality of second detectors aligned with each other in the first direction. The second detectors are offset relative to the first detectors in a second direction that is different than the first direction. A processor determines an interpolation coefficient related to the offset between the first and second detectors and determines an angle of detection of the device based on the interpolation coefficient.

Abstract: A reconfigurable radar unit is described that includes: a millimetre wave (mmW) transceiver (Tx/Rx) circuit; a mixed analog and baseband integrated circuit; and a signal processor circuit. The mmW Tx/Rx circuit and mixed analog and baseband integrated circuit and signal processor circuit are configured to support a plurality of radar operational modes. a radar sensitivity monitor and architecture reconfiguration control unit (260) is coupled to the signal processor circuit and is configured to monitor a radar performance and, in response thereto, initiate a change in the radar operational mode.

Abstract: The light control device is installed in a movable body, and comprises a light transmission/reception unit including an emission unit and a light receiving unit. The emission unit emits a light, and the light receiving unit receives the light reflected by an object around the movable body. The control unit controls the emission unit to continuously shift the light emitted by the emission unit in a first direction and a second direction crossing the first direction such that a transition locus of the light emitted by the emission unit becomes helical.

Abstract: The present disclosure relates to systems and methods that facilitate light detection and ranging operations. An example transmit block includes at least one substrate with a plurality of angled facets. The plurality of angled facets provides a corresponding plurality of elevation angles. A set of angle differences between adjacent elevation angles includes at least two different angle difference values. A plurality of light-emitter devices is configured to emit light into an environment along the plurality of elevation angles toward respective target locations so as to provide a desired resolution and/or a respective elevation angle. The present disclosure also relates to adjusting shot power and a shot schedule based on the desired resolution and/or a respective elevation angle.

Abstract: A light detection and ranging (LiDAR) optical system, according to one embodiment of the present invention, comprises: a first mirror which is disposed to make a predetermined first angle with a horizontal plane and has a first hollow; a light source for outputting a pulse laser from the lower portion of the first mirror; a second mirror which is disposed to make a predetermined second angle with the first mirror so that the pulse laser passes through the first hollow and travels to a measurement target; at least two path control mirrors which reflect the pulse laser so that the path of the pulse laser is formed on a reflective surface of the second mirror; a light receiving lens for receiving, from the lower portion of the first mirror, light which has been reflected through the first mirror.

Abstract: A lidar sensor, especially for motor vehicles, having a light source, a movable deflection mirror for producing a scanning beam that sweeps across a monitored space by deflecting a light beam emitted by the light source, and having an optical receiver for detecting light reflected by an object hit by the scanning beam in the monitored space. The light source and the deflection mirror are adapted for using the deflected light beam to scan an array of micro-optical elements, each of which, in response to being impinged upon by this light beam, widens it into a divergent beam; and, configured at a distance from the array of micro-optical elements, is a light-concentrating element that transforms the divergent beam into a beam which forms the scanning beam and whose beam diameter is larger than that of the deflected beam.

Abstract: Object detection and distance measurement using a scanning device is provided. The beam deflection device for light detection and ranging (LiDAR) includes a base, permanent magnets, a maglev reflector attached to the permanent magnets, and control coils mounted on the base. The maglev reflector may be configured to levitate due to an electromagnetic interaction of the permanent magnets and the control coils, and the control coils may consist of horizontal (H)-control coils defining a position of the maglev reflector in a horizontal direction and vertical (V)-control coils defining a position of the maglev reflector in a vertical direction.

Abstract: An optical scanning system comprises an optical scanning device and a photoreceiver device. The optical scanning device includes a first waveguide array including a plurality of first waveguides through which light beams propagate and from which the light beams are emitted as emission light in an emission direction crossing a propagation direction of the light beams. The photoreceiver device includes a second waveguide array including a plurality of second waveguides disposed in areas on which, when the emission light from the plurality of first waveguides is reflected as reflected light from a target object, the reflected light is incident, the plurality of second waveguides configured to receive the reflected light to propagate the received reflected light as propagating light beams. An array pitch of the plurality of first waveguides in the optical scanning device differs from an array pitch of the plurality of second waveguides in the photoreceiver device.

Abstract: Methods and systems for performing three dimensional LIDAR measurements with multiple illumination beams scanned over a three dimensional environment by one or more optical phase modulation devices are described herein. In one aspect, illumination light from each LIDAR measurement channel is emitted to the surrounding environment in a different direction by an optical phase modulation device. The optical phase modulation device also directs each amount of return measurement light onto a corresponding photodetector. The illumination pulse output of each LIDAR measurement channel is synchronized with commanded changes of state of each corresponding optical phase modulation device. In some embodiments, each optical phase modulation device is associated with a single LIDAR measurement channel. In some embodiments, multiple LIDAR measurement channels are associated with a single modulation device. In some embodiments, a one dimensional optical phase modulation device is employed.

Abstract: A LIDAR system emits laser bursts, wherein each burst has at least a pair of pulses. The pulses of each pair are spaced by a time interval having a variable duration to reduce effects of cross-talk. For example, certain embodiments may have multiple emitter/sensor channels that are used sequentially, and each channel may use a different duration for inter-pulse spacing to reduce the effects of cross-talk between channels. The durations may also be varied over time. The emitters and sensors are physically arranged in a two-dimensional array to achieve a relatively fine vertical pitch. The array has staggered rows that are packed using a hexagonal packing arrangement. The channels are used in a sequential order that is selected to maximize spacing between consecutively used channels, further reducing possibilities for inter-channel cross-talk.

Abstract: The present invention provides a method for identifying noise data of a laser ranging device. An n number of measurement points P(i), P(i?1) and P(i+1) corresponding to an n number of projection lines that are adjacent to each other are extracted from a plurality of measurement points at which distances have been measured by a laser ranging device 1. An approximate straight line L(i) that passes through the n number of measurement points is calculated. A degree of inclination e(i) of the approximate straight line L(i) with respect to the representative line among the projection lines corresponding to the n number of measurement points is determined. If the degree of inclination is smaller than a predetermined threshold value, then the measurement data on a measurement point having a largest distance measurement value among the n number of measurement points is identified as noise data.

Abstract: A distance measuring device includes a calculating section configured to calculate, based on phase information acquired by a first device and a second device, at least one of which is movable, a distance between the first device and the second device. The first device includes a first reference signal source and a first transceiver configured to transmit two or more first carrier signals and receives two or more second carrier signals using an output of the first reference signal source. The second device includes a second reference signal source configured to operate independently from the first reference signal source and a second transceiver configured to transmit the second carrier signals and receives the first carrier signals using an output of the second reference signal source. The calculating section calculates the distance based on a phase detection result obtained by reception of the first and second carrier signals.

Abstract: A distance measuring device includes a calculating section that calculates, based on phase information acquired by a first device and a second device, at least one of which is movable, a distance between the first device and the second device. The first device includes a first transceiver that transmits three or more first carrier signals and receives three or more second carrier signals using an output of a first reference signal source. The second device includes a second transceiver that transmits the three or more second carrier signals and receives the three or more first carrier signals using an output of a second reference signal source. The calculating section calculates the distance based on a phase detection result obtained by reception of the first and second carrier signals and corrects the calculated distance based on information concerning an amplitude ratio of the first carrier signals received by the second transceiver.

Abstract: The present invention concerns a method and apparatus for the modulation of an acoustic field for providing tactile sensations. A method of creating haptic feedback using ultrasound is provided. The method comprises the steps of generating a plurality of ultrasound waves with a common focal point using a phased array of ultrasound transducers, the common focal point being a haptic feedback point, and modulating the generation of the ultrasound waves using a waveform selected to produce little or no audible sound at the haptic feedback point.

Abstract: Spectral components of waves having one or more properties other than phase and amplitude that vary monotonically with time at a receiver, and provide retardations or lags in the variation in proportion to the times or distances traveled from the sources of the waves to the receiver. The lags denote the property values prior to departure from a source and are absent in its proximity. Orthogonality of the lags to modulated information makes them useful for ranging and for separation or isolation of signals by their source distances. Lags in frequencies and wavelengths permit multiplication of capacities of physical channels. Constancy of the lagging wavelengths along the entire path from a source to the receiver enables reception through channels or media unusable at the source wavelengths, as well as imaging at wavelengths different from the illumination.

Abstract: A radar apparatus includes: a radar transmitter transmitting a radar signal; and a radar receiver receiving a reflection wave signal being a reflection of the radar signal on a target. The radar transmitter includes: a radar transmission signal generator that generates the radar signal composed of a transmission code with each sub-pulse given a predetermined phase shift; and a transmission radio unit that transmits the radar signal generated by the radar transmission signal generator in a predetermined transmission cycle. In radar signals transmitted by the transmission radio unit in a predetermined number of transmission cycles, code imbalances of transmission codes are included in all of four quadrants of the IQ plane. Each of the code imbalances is an imbalance between the positions where a plurality of sub-pulses constituting a transmission code included in a radar signal transmitted in each of the transmission cycles are mapped on the IQ plane.

Abstract: A signal generator according to the invention includes: a reference signal source configured to output a clock signal; a phase locked loop (PLL) circuit configured to generate a chirp signal as a feedback loop type circuit including a frequency divider using the clock signal; and a linearity-improvement processor configured to detect a frequency of a chirp signal of an M-th period generated by the PLL circuit where M is an integer greater than or equal to 1, and to control a division ratio of the frequency divider such that a difference between a frequency of a chirp signal generated in (M+1)-th and subsequent periods in the PLL circuit and a desired frequency becomes smaller than a difference between the detected frequency and the desired frequency.

Abstract: A method for using a radar assembly to sense an environment includes a radar system that has an antenna assembly secured for 360-degree rotation, the antenna assembly having mounted thereon at least one transmit antenna, and a first set of three or more separate fixed receive antennas, with the antenna assembly having a greater width than height so as to create a fanbeam. In the method of the present invention, the antenna assembly is rotated to a first azimuth position, and then an FMCW waveform is transmitted within the fanbeam, and reflections are received from targets in the environment while in the first azimuth position. Based on the received reflections, data is processed and stored. These steps are repeated for all other azimuths until an azimuth sweep has been completed. At that time, a full environmental data set is compiled for the environment, where the data set comprises azimuth data, range data, elevation data and RCS data. The data set is gathered and delivered to a controller for analysis.

Abstract: A millimeter-wave antenna includes a slit which is provided in a GND conductor formed in a first surface of a circuit board, a horn antenna which is provided with a first opening and a second opening, and an impedance matching device which is provided in a slot shape between the slit and the first opening of the horn antenna. The impedance matching device is formed in the slot shape which is filled with a dielectric having a dielectric constant different from that of the circuit board. The impedance matching device is configured such that a length of the slot shape in a propagation direction is less than 1/4 of a wavelength of a use frequency upper limit. The impedance matching device is configured such that a size of a rectangular shape of the slot shape in a magnetic field direction is larger than the first opening of the horn antenna.

Abstract: Time of Flight ranging using double-sided two-way ranging (DS-TWR) is a conventional method of ranging with ultra-wideband (UWB) radios and has been shown to have ranging accuracies on the order of tens of centimeters. This approach requires several transmissions for each range measurement, which does not scale well for multi-agent robotics because of the bandwidth needed for ranging measurements. This disclosure proposes a latent model for clock frequencies using a factor graph that enables greater consistency of clock synchronization and increases the rate of useful range measurements. This model is an effective and robust improvement to conventional DS-TWR that can leverage shared information from a network of robots. An increase in the rate of range measurements of 232% was obtained as compared to DS-TWR with the same hardware and transmission rate, and with a mean square error of range measurements of 20 cm.

Abstract: A method and a device for detecting at least one target in an image, wherein the image comprises a set of pixels with a magnitude assigned to each pixel is provided. The method comprises an iterative process until the K+1th target does not show a probability increase above a predetermined threshold value. The method is performed by creating a candidate free image, calculating, for the candidate free image, the probability of there being a target at each pixel, by using Bayes theorem, determining a location of the candidate target K+1 in the image, determining the probability that there is a target at the determined location, by determining the calculated probability of there being a target at the determined location. By performing the above, the most probable locations for targets in the image are located together with the probability that the location holds a true target.

Abstract: A vehicle radar system (3, 3?) and related method including a transceiver arrangement (7, 7?) that is arranged to generate and transmit at least a first radar signal over a cycle (4a) and a following second radar signal over a cycle (4b). For the first radar signal cycle (4a), a corresponding first received signal (5a) and corresponding first received signal information (20a, 28a) is obtained, and for a following second radar signal cycle (4b), a corresponding second received signal (5b) and corresponding second received signal information (20b, 28b) is obtained. The vehicle radar system (3, 3?) is arranged to calculate a difference between the first received signal information (20a, 28a) and the second received signal information (20b, 28b).

Abstract: An integrated radio-frequency circuit for a radar sensor, having a clock input that is designed to receive a clock signal produced externally to the integrated radio-frequency circuit, having a local oscillator that is designed to produce a local radio-frequency signal, having a radio-frequency input that is designed to receive an external radio-frequency signal produced externally to the integrated radio-frequency circuit, and having a changeover switch that is coupled to the local oscillator and to the radio-frequency input and is designed to change over between the local radio-frequency signal and the external radio-frequency signal for the production of a radar signal. In addition, a corresponding radar sensor and a corresponding operating method, are also described.

Abstract: The present disclosure provides an obstacle detecting method and apparatus, a device and a storage medium, wherein the method comprises: obtaining a 3D point cloud collected by a driverless vehicle during travel; determining a set of vertexes and a set of edges respectively according to the obtained 3D point cloud; clustering vertexes in the set of vertexes according to the set of edges to obtain a smallest generated tree as an obstacle detection result. The solutions of the present disclosure can be applied to reduce workload and improve the accuracy of detection results.

Abstract: A detection apparatus that includes correlation processing systems that each find a correlation between a predetermined code sequence and a wave detection signal obtained by detecting a phase-modulated input wave at a frequency different from a frequency used by a different one of the correlation processing systems, and thereby generate a correlation signal, level reduction processors that each receive the correlation signal from a corresponding one of the plurality of correlation processing systems and reduce a level of the received correlation signal when the correlation signal is not to be used for detection of the target or do not reduce the level of the received correlation signal when the correlation signal is to be used for detection of the target, and a detector that detects at least presence or absence of the target based on the correlation signal processed by each of the plurality of level reduction processors.