Abstract: A lidar system can include a lidar transmitter and a lidar receiver, where the lidar transmitter controllably transmits a pulse burst toward a target in a field of view and where the lidar receiver resolves an angle to the target based on returns from the pulse burst. The pulse burst can include a first pulse fired at a first shot angle and a second pulse fired at a second shot angle.

Abstract: The vehicle includes a surrounding vehicle detector detecting reflected points of surrounding vehicles present around the vehicle by emitting electromagnetic waves to surroundings of the vehicle, and a processor configured to generate object marks by grouping the reflected points detected by the surrounding vehicle detector, and edit the generated object marks. The processor is configured to extract two object marks from the generated object marks, identify an ideal shape for when the two object marks are merged based on surfaces defined by the two object marks and able to be seen from the vehicle, and merge the two object marks into the ideal shape if predetermined merger conditions are satisfied.

Abstract: A radar sensing system for a vehicle includes a radar sensor having a plurality of transmitting antennas and a plurality of receiving antennas. The transmitting antennas and the receiving antennas are arranged in multiple rows and columns of transmitting antennas and multiple rows and columns of receiving antennas. A control controls radar transmission by the transmitting antennas and receives outputs from the receiving antennas. The control applies two dimensional multiple input multiple output processing to outputs of the receiving antennas. With two dimensional multiple input multiple output processing applied to outputs of the receiving antennas, the transmitting antennas and the receiving antennas achieve an enhanced two dimensional virtual aperture.

Abstract: The distance estimation device acquires distances from a movable body at a first time and a second time to two ground objects, respectively, and acquires a distance between the two ground objects. Then, the distance estimation device calculates a moving distance of the movable body from the first time to the second time based on the acquired results. Thus, the distance estimation device calculates the moving distance of the movable body by using arbitrary ground objects measurable from the movable body.

Abstract: Examples disclosed herein relate to methods and apparatuses for an antenna structure having reactance control of an array of radiating elements to achieve radiation beam tilting.

Abstract: An adaptive sensor array system and method includes receiving one or more signals from a sensor array and compare the received signals to one or more object detection threshold values, determining if the robotic cleaner was moving along a travel path for a predetermined period of time, window W, in response to a determination that the robotic cleaner was operating in straight-line motion during the window W, calculating a value of the received detected signals from the sensor array during one or more calibration periods C of the window W, and adjusting one or more of the object detection threshold values based on the calculated value during the window W. A sum of all the calibration periods C during window W is less than a length of the window W. One of the calibration periods C may start at a beginning of the window W.

Abstract: To provide a vehicle detection system capable of detecting a preceding vehicle traveling ahead of an own vehicle based on a position of an object by using an electromagnetic wave sensor while suppressing erroneous detection, an ECU determines if first and second positions detected by a millimeter wave radar are included in the same vehicle. The ECU designates calculated information of the preceding vehicle detected based on the first position as a calculation result if it determines that detection of the preceding vehicle is made based on the first position. The ECU uses calculated information of the preceding vehicle detected based on the second position as the calculation result when it determines that detection of the vehicle is not made based on the first position but the first and the second positions had been determined in the past as detected in the same vehicle.

Abstract: A lidar system is described herein. The lidar system includes a transmitter that is configured to emit a frequency-modulated lidar signal. The lidar system further includes processing circuitry that is configured to compute a distance between the lidar system and an object based upon the frequency-modulated lidar signal, the processing circuitry configured to compute the distance with a first resolution when the distance is at or beneath a predefined threshold, the processing circuitry configured to compute the distance with a second resolution when the distance is above the predefined threshold, wherein the first resolution is different from the second resolution.

Abstract: The present disclosure relates to a radar sensor apparatus for a vehicle, a method of detecting an object using the radar sensor apparatus, and an antenna apparatus for the radar sensor apparatus. The antenna apparatus includes N (N is an even number greater than or equal to 4) transmitting antennas and a divider. Since the divider is configured such that a preset value is set on a power ratio that is a ratio of power supplied to each transmitting antenna and a phase ratio that is a ratio of phase of a signal transmitted from each transmitting antenna, it is possible to detect a mid/long range target and a short range target simultaneously.

Abstract: A method and apparatus for processing information are provided. A specific embodiment of the method includes: identifying at least one obstacle from a point cloud collected by a lidar during a traveling process of a vehicle; for an obstacle in the at least one obstacle, determining an appearance rate of the obstacle within a life cycle corresponding to the obstacle; determining a confidence degree of a grid region of at least one grid region based on appearance rates of obstacles in the at least one obstacle; determining a target grid region from the at least one grid region based on the confidence degree, and determining whether an obstacle detected in the target grid region is an obstacle detected for a first time; and if yes, filtering out a point cloud corresponding to the obstacle detected in the target grid region for the first time.

Abstract: Control determines whether or not two objects represent the same object, in which one object is detected at a first position in front of a vehicle by an electromagnetic wave sensor and the other object is detected at a second position in front of the vehicle by image sensor. The control further determines whether or not the other object is partially excluded from an image acquired by the image sensor, in which a part of the object may have been outside the imaging region of the image sensor. The control changes a determination condition used for determining whether or not the objects represent the same object, such that the object whose part is excluded from the acquired image is more easily determined as the same object, compared with an object determined that such a part is not excluded from the acquired image.

Abstract: Systems, methods, and non-transitory computer-readable media provide a blind online calibration mechanism to calibrate the position of the radar unit while the self-driving vehicle is in motion without the use of any map data. Specifically, a calibration system associated with the self-driving vehicle is configured to adjust the boresight angle of the radar within a calibration range and monitor the convergence or divergence pattern of the resulting clutter locations. The boresight angle of the radar unit may be progressively adjusted in static or dynamic degree increments until the convergence of the clutter curves is observed. In this way, without using any map data or factory settings, radar calibration can be conducted as often as needed while the vehicle is moving. Radar sensing and measurement accuracy is thus improved.

Abstract: An object detection device including a receiver, wherein the receiver has: a reception unit that receives an RF reception signal that is a reflection of an RF transmission signal reflected from at least one target; an IF signal generation unit that generates an IF signal; a position detection unit that detects a position of the target based on an amplitude in a spectrum computed from the IF signal; a displacement detection unit that detects a displacement of the target based on a phase in a one-dimensional spectrum at the position; a speed detection unit that detects a speed of the target based on a plurality of the IF signals; and a target determination unit that identifies a type of the target by using detection results and detection results, or detection results from the displacement detection unit, environmental information defined at each position, and detection results.

Abstract: A system for detecting objects in an environment, comprising a measuring system and a processing unit in signal communication with the measuring system, wherein: the measuring system comprises macro-components formed of respective subcomponents, wherein the macro-components comprise: a waveform generator configured to provide an electrical signal to be transmitted with a predetermined waveform, transmitting and receiving means configured to transmit a first electromagnetic signal matching the electrical signal to be transmitted and to receive from the environment a second electromagnetic signal generated by a reflection of the first electromagnetic signal, thereby providing a received signal matching the second electromagnetic signal, an analog conditioning circuit configured to provide a baseband electrical signal by baseband converting the received signal, and an analog-to-digital converter configured to provide a digital signal which is a discrete sequence of values obtained by sampling the baseband el

Abstract: Example embodiments relate to corrugated radomes for protecting and concealing components of radar units. An example radar system may include a radar unit that includes at least one antenna having a radiation pattern. The radar unit is configured to transmit a radar signal based on the radiation pattern and receive radar signals. In addition, the radar system further includes a radome located in a direction of transmission of the radiation pattern. Particularly, the radome includes a stepped surface having at least one step that includes a height equal to one-quarter of a wavelength at a frequency of operation of the radar unit. The least one step is positioned on the radome such that the at least one step causes deconstructive interference of reflections of the transmitted radar signal caused by the radome.

Abstract: Disclosed herein are integrated circuit (IC) packages, antenna boards, antenna modules, and communication devices (e.g., for millimeter wave communications). For example, in some embodiments, an antenna module may include: a logic die; a radio frequency front-end (RFFE) die in electrical communication with the logic die; and an antenna patch, wherein the RFFE die is closer to the antenna patch than the logic die is to the antenna patch.

Abstract: A system for estimating a range and a velocity of an object includes a processing device configured to perform, for each return pulse of a return signal including reflections of a radar signal, applying a first Fourier transform to the return pulse to transform the return pulse into a range spectrum and calculate a range intensity value for each of a plurality of range hypotheses, calculating a range variation for each of a plurality of hypothesized Doppler frequency values, and for each hypothesized Doppler frequency value, applying a second Fourier transform to the series of return pulses based on the range intensity values and the range variation. The processing device is further configured to perform outputting range and Doppler frequency data including a range-Doppler intensity value for each range hypothesis and hypothesized Doppler frequency, and estimating a range and a velocity of the object based on the range-Doppler intensity values.

Abstract: A vehicle control apparatus acquires a position of an other vehicle that is present ahead of the own vehicle in its traveling direction, and uses the acquired position of the other vehicle to calculate a movement locus, which is a past path of the other vehicle. The vehicle control device calculates a lateral movement amount of the movement locus in a predetermined range in the traveling direction of the own vehicle, the lateral movement amount being an amount of change in position in a lateral direction which is a direction intersecting the traveling direction, and calculates an average value of the lateral movement amounts. The vehicle control apparatus excludes, from the movement loci, a movement locus having a lateral movement amount whose difference from the average value is larger than a predetermined value, and calculates the predicted path based on remaining movement loci.

Abstract: A radar includes an antenna having a radiating pattern forming a sum channel, a radiating pattern forming a difference channel and a pattern forming a control channel, and generates at least interrogation messages on the sum channel and interrogation messages on the control channel; transmits messages via the sum channel and via the control channel respectively, and receives and processes signals received via the sum, difference, and control channels, configured for detecting replies of targets on the signals received via the sum and difference channels and carrying out monopulse processing and RSLS processing on the replies.

Abstract: A control system is suitable for use in a motor vehicle and is configured and intended for using information concerning objects and/or driving-related information about another motor vehicle in order to distinguish real objects in the surroundings of the motor vehicle from erroneously detected objects, based on surroundings data that are obtained from at least one surroundings sensor situated on the motor vehicle and provided to the control system. Based on these surroundings data, an object in the surroundings of the motor vehicle is detected, and a distance and/or a relative speed and/or an angle between the motor vehicle and the object are/is determined. The object is then classified as an actually existing object or as an erroneously detected object, based on the determined distance and/or based on the determined relative speed and/or based on the determined angle.

Abstract: A method for generating a compact representation of radar data, includes determining at least one data peak within a multi-dimensional representation of radar data; and compressing radar data samples of the multi-dimensional representation within a limited neighborhood around the at least one data peak to generate the compact representation.

Abstract: In one embodiment, a method includes accessing sensor data generated by one or more sensors of the vehicle, determining that a first beam angle of a radar of the vehicle provides insufficient radar visibility of a current road condition according to one or more criteria based on the sensor data, determining an amount of adjustment needed to adjust the first beam angle of the radar, adjusting the first beam angle of the radar to a second beam angle based on the determined amount of adjustment, and detecting one or more objects based on the second beam angle of the radar.

Abstract: A lidar system is described herein. The lidar system includes a transmitter that is configured to emit a frequency-modulated lidar signal. The lidar system further includes processing circuitry that is configured to compute a distance between the lidar system and an object based upon the frequency-modulated lidar signal, the processing circuitry configured to compute the distance with a first resolution when the distance is at or beneath a predefined threshold, the processing circuitry configured to compute the distance with a second resolution when the distance is above the predefined threshold, wherein the first resolution is different from the second resolution.

Abstract: A sensor system for a vehicle, including a control unit, which is situated in the vehicle; multiple sensor units, which are situated on or in the vehicle and connected to the control unit, at least one of the sensor units being connected via a bidirectional connecting line for signal exchange or via a bidirectional connecting line and via a synchronization line to the control unit and being configured to receive a synchronization signal from the central control unit via the bidirectional connecting line or via the synchronization line to be operated by the control unit at a predefined point in time.

Abstract: An electronic key system determines that legitimate communication has been performed on the basis of conditions including that a measured distance from a ranging request unit to a ranging response unit measured on the basis of a ranging request signal and a ranging response signal is within a threshold range that is set on the basis of the distance from a communication area of a transmission antenna where an electronic key is determined to be located by a key location determination unit to one of either the ranging request unit or the ranging response unit that is provided in an on-board device.

Abstract: A system for a target image reconstruction includes a stepped frequency transmitter configured to emit a stepped frequency waveform having different constant frequencies at different periods of time and a modulator configured to modulate the stepped frequency waveform emitted at each period of time with a modulation signal to output a modulated stepped frequency waveform with an increased bandwidth. The system includes a transceiver configured to transmit the modulated stepped frequency waveform to a target and to accept reflection of the modulated stepped frequency waveform reflected from the target, a mixer to interfere the unmodulated stepped frequency waveform and the reflection of the modulated stepped frequency waveform to produce a beat signal of the interference of the unmodulated stepped frequency waveform with the reflection of the modulated stepped frequency waveform, and a signal processor to reconstruct an image of the target from the beat signal.

Abstract: A surrounding monitoring radar device includes a signal generation unit, a spectrum generation unit, a cycle setting unit, a learning unit, and an update unit. At an update timing, the update unit updates a determination reference to a learned value calculated by the learning unit. the learning unit is configured to: set the learning value to an initial value at a start timing of the learning period; compare the learned value with a value of a noise floor of the generated frequency spectrum during the learning period; and update the learned value to the value of the noise floor upon the value of the noise floor being smaller than the learned value.

Abstract: A radome subassembly for a radar sensor for motor vehicles, which radar sensor encompasses a radar-frequency printed circuit board having at least one antenna and a radar-frequency printed circuit alongside the antenna, the radome subassembly encompassing: a radome for covering the antenna side of the radar-frequency printed circuit board; and an absorber for radar waves in order to shield the radar-frequency printed circuit, the absorber being disposed in front of an inner side of the radome, the absorber leaving a region next to the absorber, in front of the inner side of the radome, open for a main antenna lobe of the at least one antenna, the absorber being fastened on the radome, and the radome subassembly having at least one elastic plastic element by way of which the absorber is braced movably against the inner side of the radome. A radar sensor having the radome subassembly is also described.

Abstract: The present disclosure relates to systems and methods that facilitate light detection and ranging operations. An example method includes determining, for at least one light-emitter device of a plurality of light-emitter devices, a light pulse schedule. The plurality of light-emitter devices is operable to emit light along a plurality of emission vectors. The light pulse schedule is based on a respective emission vector of the at least one light-emitter device and a three-dimensional map of an external environment. The light pulse schedule includes at least one light pulse parameter and a listening window duration. The method also includes causing the at least one light-emitter device of the plurality of light-emitter devices to emit a light pulse according to the light pulse schedule. The light pulse interacts with an external environment.

Abstract: An information handling system (IHS) may include a configuration sensor for sensing a physical configuration of the IHS, a first proximity sensor probe for sensing whether a first biological entity element is proximate to a first antenna, a second proximity sensor probe for sensing whether a second biological entity element is proximate to a second antenna, and a third proximity sensor probe for sensing whether a third biological entity element is proximate to a third antenna. The IHS is adapted to reconfigure use of at least two of the first antenna, the second antenna, and the third antenna in response to the sensing of at least one of the first proximity sensor probe, the second proximity sensor probe, and the third proximity sensor.

Abstract: Systems, methods, tangible non-transitory computer-readable media, and devices for operating an autonomous vehicle are provided. For example, the disclosed technology can include receiving sensor data and map data. The sensor data can include information associated with an environment detected by sensors of a vehicle. The map data can include information associated with traffic signals in the environment. Further, an input representation can be generated based on the sensor data and the map data. The input representation can include regions of interest associated with images of the traffic signals. States of the traffic signals in the environment can be determined, based on the input representation and a machine-learned model. Traffic signal state data that includes a determinative state of the traffic signals can be generated based on the states of the traffic signals.

Abstract: A vehicular sensing system includes a plurality of sensors disposed at a vehicle so as to have a combined field of sensing forward, rearward and sideward of the vehicle. Data captured by the sensors is processed at a control to detect objects present in a respective field of sensing. A control designates a plurality of locations within the fields of sensing. As the vehicle moves along the road, the control increases a value for each designated location when an object is detected at that designated location and decreases the value for each designated location when an object is not detected at that designated location. The control, as the vehicle moves along the road, generates an object map based on values for the designated locations. The greater the value for a particular designated location, the greater the probability an object is present at that particular designated location.

Abstract: The invention relates to a method for detecting road users along at least one traffic route, wherein the method comprises the following steps: emitting transmission signals by means of at least one transmission device for radar radiation, detecting received signals by means of at least one reception device for radar radiation, mixing the transmission signals and the received signals to produce baseband signals and calculating a detection matrix from the baseband signals and evaluating the detection matrix in an evaluation module of an electronic data processing device, wherein peaks of the detection matrix are assigned to objects, checking whether a disturbance criterion is met in a diagnostic module, generating signals from the results of the evaluation in the evaluation module and the check in the diagnostic module, and transmitting the signals to a control module of an electronic data processing device.

Abstract: The present disclosure provides a vehicle control apparatus and a vehicle control method comprising a radar for receiving radar signals transmitted from outside the vehicle and reflected from objects around the vehicle and processing the received radar signals to obtain detection data for the objects, and a controller for determining a stationary object among the objects based on the detection data, extracting feature points, determining whether the stationary object is a guardrail based on the extracted feature points, and determining a false target among the objects based on the guardrail. According to the present disclosure, it is possible to prevent the unrecognition or misrecognition of the control targets due to the guardrail.

Abstract: An object sensing apparatus 1 includes: an emission unit 11 configured to emit an RF transmission signal as an electromagnetic wave for object sensing; a reception unit 21 configured to receive a reflected wave of the RF transmission signal as an RF reception signal, and use the RF transmission signal to generate a demodulated signal based on the RF reception signal; a distance detection unit 22 configured to detect a distance to the object that reflected the RF transmission signal based on the range spectrum calculated based on the demodulated signal; a behavior detection unit 23 configured to detect behavior of the object based on the range spectrum; a fixed object specifying unit 24 configured to specify a fixed object from among detected objects based on the distance and behavior; and a virtual image specifying unit 25 configured to, if there are two or more objects other than the fixed object among the detected objects, calculate a degree of similarity in the change over time in the behavior for each com

Abstract: A location detection system includes a first directional radar sensor, a second directional radar sensor and a controller. The first directional radar sensor has a first facing direction and a first radio coverage correspondingly, and is used to receive a first response signal upon detecting an object. The second directional radar sensor has a second facing direction and a second radio coverage correspondingly, the second radio coverage being partially overlapping with the first radio coverage, and is used to receive a second response signal upon detecting the object. The controller is used to determine which region the object is located in according to receptions of the first response signal and the second response signal.

Abstract: A mobile body, a control device, a surrounding object detector, and a monitoring device capable of controlling a safety system of a mobile body having an omnidirectional movement mechanism with a simple configuration are provided. A mobile body according to an embodiment includes drive wheels, a rotational velocity detector, an object detector, a controller, and a changer. The drive wheels are three or more drive wheels that allows the mobile body to move in all directions, and the respective drive wheels are driven independently. The rotational velocity detector detects respective rotational velocities of the drive wheels. The object detector detects an object around the mobile body. The controller decelerates or stops the mobile body when an object is detected in a monitoring area by the object detector. The changer changes a range of the monitoring area on the basis of the respective rotational velocities of the drive wheels detected by the rotational velocity detector.

Abstract: A vehicle radar system (3) mounted in a host vehicle (1) arranged to run in a forward running direction (D). The vehicle radar system (3) includes a transceiver arrangement (7) to generate and transmit radar signals (4), and to receive reflected radar signals (5), the transmitted radar signals (4) have been reflected by one or more objects (6, 12). The radar system (3) provides range (rn), azimuth angle (?n) and radial velocity (vm) for a plurality of measurement points (9, 9?) at the objects (6, 12). The radar system (3) is divides a total detection volume (8) into at least two partial volumes (8a, 8b, 8c, 8d), and performs a velocity estimation for each partial volume (8a, 8b, 8c, 8d) such that a total velocity distribution (14) is acquired along a side extension (E) that is perpendicular to an extension along the vehicle forward running direction (D).

Abstract: A method for providing alerts for a traffic slowdown includes receiving location data for at least a first vehicle of a plurality of vehicles, map matching the location data for at least the first vehicle to a road network, calculating an approaching speed for at least the first vehicle at a first time, calculating a final speed for at least the first vehicle at a second time, and generating a traffic slowdown message in response to the approaching speed and the final speed. The traffic slowdown message includes at least one characteristic of the traffic slowdown.

Abstract: A method performed by an intention indicating system of a vehicle, for indicating to a potential observer an ongoing or impending autonomous kinematic action of the vehicle. The method includes determining an ongoing or impending autonomous kinematic action of the vehicle and performing a vertical vehicle motion representing the autonomous kinematic action, the vertical vehicle motion including raising and/or lowering a front portion and/or a rear portion of a vehicle body of the vehicle.

Abstract: An electronic control unit or ECU as an object detection device is mounted on an own vehicle equipped with a millimeter wave sensor. The ECU provides functions of a first detection part, a second detection part and a presence probability calculation part. The first detection part performs a FMCW method, and the second detection part performs a FCM method so as to detect presence of a detection target on the basis of detection results of the millimeter wave sensor. The presence probability calculation part calculating a presence probability of the detection target on the basis of the detection results of the first detection part and the second detection part.

Abstract: A method is provided that includes a vehicle receiving data from an external computing device indicative of at least one other vehicle in an environment of the vehicle. The vehicle may include a sensor configured to detect the environment of the vehicle. The at least one other vehicle may include at least one sensor. The method also includes determining a likelihood of interference between the at least one sensor of the at least one other vehicle and the sensor of the vehicle. The method also includes initiating an adjustment of the sensor to reduce the likelihood of interference between the sensor of the vehicle and the at least one sensor of the at least one other vehicle responsive to the determination.

Abstract: Systems and methods provide an antenna array with separately fed subarrays. The systems and methods provide optimized or improved physical embodiments of each sub-banded subarray in terms of radiating element type and physical implementation, radio frequency integrated circuit (RFIC) technology choice, RFIC packaging and interconnect implementation, and/or intra-subarray feed typology choice and implementation. The antenna array can include first elements within a first distance range from a point in a surface associated with the antenna array and configured for first signals in a first frequency range, and second elements within a second distance range from the point and configured for second signals in a second frequency range. The antenna system also can include an interconnect system comprising a first multichip module and a second multichip module region.

Abstract: A ghost removal method includes steps of detecting, estimating and excluding. In the detecting, a position and a relative speed of a target moving object, and a position of a surrounding stationary object are detected with radio waves. In the estimating, a position and a relative speed of a ghost by the target moving object are estimated based on the detected position and relative speed of the target moving object and the position of the surrounding stationary object. In the excluding, a detected point where the estimated position and the relative speed of the ghost are detected is excluded from a candidate detection point of a moving object which is detected with radio waves.

Abstract: In one embodiment, during a planning stage of autonomous driving of an autonomous driving vehicle (ADV), it is determined that the ADV needs to change lanes from a source lane to a target lane. A first trajectory is generated from a current location of the ADV in the source lane to the target lane such as a center line of the target lane. A lane shifting correction is then calculated based on the lane configuration of at least the source lane and/or target lane, as well as the current state of the ADV. Based on the lane shifting correction, at least the starting point of the first trajectory is modified, which in turn generates a second trajectory. In one embodiment, the starting point of the first trajectory is shifted laterally with respect to a heading direction of the source lane based on the lane shifting correction.

Abstract: A method is provided that involves identifying a target region of an environment of an autonomous vehicle to be monitored for presence of moving objects. The method also involves operating a first sensor to obtain a scan of a portion of the environment that includes at least a portion of the target region and an intermediate region between the autonomous vehicle and the target region. The method also involves determining whether a second sensor has a sufficiently clear view of the target region based on at least the scan obtained by the first sensor. The method also involves operating the second sensor to monitor the target region for presence of moving objects based on at least a determination that the second sensor has a sufficiently clear view of the target region. Also provided is an autonomous vehicle configured to perform the method.

Abstract: An antenna array for a radar sensor, having an antenna designed as a group antenna and operable as a transmit antenna and having an antenna configuration operable as a receive antenna, wherein the array has, in addition to the first antenna designed as a group antenna, a second antenna operable as a transmit antenna that has a smaller aperture than the first antenna, and the first and second antenna are designed for the transmission of radar waves having polarization orthogonal to one another, and the antenna configuration operable as a receive antenna is sensitive to both directions of polarization.

Abstract: A motion detection system includes a first motion detection device that detects a motion of an object based on a reflected wave of a radio wave transmitted by a first radio wave sensor, the first motion detection device including the first radio wave sensor, and a second motion detection device that detects the motion based on a reflected wave of a radio wave transmitted by a second radio wave sensor, the second motion detection device including the second radio wave sensor, wherein one motion detection device among the first and second motion detection devices transmits a determination radio wave and another motion detection device among the first and second motion detection devices receives the determination radio wave, and wherein only the first motion detection device is used to detect the motion when received intensity of the received determination radio wave is smaller than a predetermined threshold.

Abstract: A radar system includes a signal generator to generate a linear frequency modulated continuous wave signal as a base chirp, and one or more frequency shifters to generate respective one or more additional chirps from the base chirp. The radar system also includes two or more switches. One of the two or more switches obtains a portion of the base chirp as a base transmit signal, and remaining ones of the two or more switches respectively obtain a portion of each of the one or more additional chirps as one or more additional transmit signals for transmission by the radar system. At least a portion of the base transmit signal and the one or more additional transmit signals overlaps in time.

Abstract: A vehicle radar system (3) and related method including at least one transceiver arrangement (7) arranged to generate and transmit radar signals (4), and to receive reflected radar signals (5). The radar signals form a plurality of sensing sectors or sensing bins (8a-8g), that together form a transceiver coverage (9), For each sensing bin (8a-8g) the radar system (3) is arranged to obtain a target angle (?) and a target range (r) to possible target objects (10a-10j). The radar system (3) is further arranged to determine an unoccupied domain border (11) and a corresponding unoccupied domain (12) for the radar transceiver coverage (9).