Abstract: A method of forming a radar system includes forming a first receive antenna and a first ground plane region by patterning a first conductive layer on a first surface of a first laminate layer of a radar package, forming a transmit antenna and a second ground plane region by patterning a second conductive layer on a second surface of the first laminate layer, forming a second laminate layer of the radar package over the second conductive layer, forming a third conductive layer over the second laminate layer, forming a second receive antenna by patterning the third conductive layer, and attaching a radio frequency integrated circuit chip to the radar package. The radio frequency integrated circuit chip is coupled to the transmit antenna, the first receive antenna, and the second receive antenna. The second surface is opposite the first surface.

Abstract: A method for detecting a horizontally buried linear object is provided, the horizontally buried linear object having a longitudinal extension. The method comprises moving, with a flying platform comprising a radar for synthetic aperture radar, SAR, vertical imaging, along a trajectory corresponding to a synthetic aperture. The method further comprises transmitting and receiving radar signals while moving along the trajectory corresponding to the synthetic aperture. The method also comprises forming a SAR image based on collected data representing radar signal reflections received from the ground. The method additionally comprises detecting one or more features in the formed SAR image relating to the horizontally buried linear object. Said trajectory is oriented in a direction substantially perpendicular to an expected orientation of the longitudinal extension of the horizontally buried object and traversing the horizontally buried object.

Abstract: An estimated initial direction of movement of a newly-detected object is to be determined. The actual previous directions of movement and positions of previously-detected objects are determined and stored. When a newly-detected object is newly detected at a certain position, then the actual previous direction of movement of one of the previously-detected objects at that position is used as a basis to determine the estimated initial direction of movement of the newly-detected object at that position.

Abstract: Example embodiments described herein involve determining three dimensional data representative of an environment for an autonomous vehicle using radar. An example embodiment involves receiving radar reflection signals at a radar unit coupled to a vehicle and determining an azimuth angle and a distance for surfaces in the environment causing the radar reflection signals. The embodiment further involves determining an elevation angle for the surfaces causing the radar reflection signals based on phase information of the radar reflection signals and controlling the vehicle based at least in part on the azimuth angle, the distance, and the elevation angle for the surfaces causing the plurality of radar reflection signals. In some instances, the radar unit is configured to receive radar reflection signals using a staggered linear array with one or multiple radiating elements offset in the array.

Abstract: Provided herein is a system on a vehicle, the system comprising an active Doppler sensor; one or more processors; and a memory storing instructions that, when executed by the one or more processors, causes the system to perform: obtaining a Doppler signature from each of one or more entities; and determining one or more calibration parameters of the active Doppler sensor based on the Doppler signature from at least a portion of the one or more entities.

Abstract: A method for adjusting the length of a Golay sequence for object recognition and an electronic device therefor are provided. The method for operating the electronic device includes estimating a predicted distance to an external object, determining, based on the estimated predicted distance, the length of a Golay sequence included in a signal for recognizing the external object, and transmitting at least one signal including a Golay sequence having the determined length, and when a device for wireless communication, included in the electronic device, is utilized to perform a radar function, the length of a Golay sequence is adjusted to enable object recognition as much as a length required according to the use of an application, such that recognition efficiency and data communication efficiency can be optimally provided.

Abstract: A device and method for anti jamming using a decoy signal are provided. The device may include a processor configured to allocate, in connection with a request for transmission of information, first frequency band to information signal including the information and allocate a second frequency band to the decoy signal including fake information associated with the information, and an outputter configured to output the decoy signal and the information signal at a predetermined time interval and output the information signal through the first frequency band after an attack on the second frequency band by the jammer that inspects the decoy signal is detected.

Abstract: According to a first aspect, a radar system with blockage detection is provided. The radar system includes a first antenna for receiving first signals and a second antenna for receiving second signals. Input circuitry processes the first signals to generate first input signals and processes the second signals to generate second input signals. A processor computes a correlation between the first input signals and the second input signals, determines a correlation variance related to variation in the correlation, and generates a determination as to whether the radar system is blocked using the correlation variance.

Abstract: This disclosure describes a radar system configured to estimate a yaw-rate and an over-the-ground (OTG) velocity of extended targets in real-time based on raw radar detections. This disclosure further describes techniques for determining instantaneous values of lateral velocity, longitudinal velocity, and yaw rate of points of a rigid body in a radar field-of-view (FOV) of the radar system.

Abstract: In an embodiment, a method includes: receiving radar signals with a millimeter-wave radar; generating range data based on the received radar signals; detecting a target based on the range data; performing ellipse fitting on in-phase (I) and quadrature (Q) signals associated with the detected target to generate compensated I and Q signals associated with the detected target; classifying the compensated I and Q signals; when the classification of the compensated I and Q signals correspond to a first class, determining a displacement signal based on the compensated I and Q signals, and determining a vital sign based on the displacement signal; and when the classification of the compensated I and Q signals correspond to a second class, discarding the compensated I and Q signals.

Abstract: A situational awareness system for aerial refueling is disclosed. In embodiments, the situational awareness system may include one or more millimeter wave devices of a tanker aircraft configured to transmit one or more emitter signals toward an aircraft to be refueled, and receive one or more reflected signals reflected from the aircraft to be refueled. In embodiments, the situational awareness system further includes a controller communicatively coupled to the one or more millimeter wave devices and the display device, the controller configured to determine a distance between a refueling assembly of the tanker aircraft and the aircraft to be refueled based on the one or more reflected signals, and generate one or more control signals configured to cause a display substrate of a display device to display at least one of a metric or image indicative of the determined distance.

Abstract: A technique for tracking objects includes: determining a set of detected measurements based on a received return signal; determining a group that includes a set of group measurements and a set of group tracks; creating a merged factor, including a merged set of track state hypotheses associated with a merged set of existing tracks including a first set of existing tracks and a second set of existing tracks, by calculating the cross-product of a first set of previous track state hypotheses and a second set of previous track state hypotheses; determining a first new factor and a second new factor; calculating a first set of new track state hypotheses for the first new factor based on a first subset of the group measurements; and calculating a second set of new track state hypotheses for the second new factor based on a second subset of the group measurements.

Abstract: Controlling an in-flight spin-rate of a spin-stabilized guided projectile is disclosed. In various embodiments, the projectile includes a despun control portion configured for despinning relative to a projectile chassis and for directional control of the projectile. In various embodiments, controlling the in-flight spin-rate includes determining a gyroscopic stability factor for the guided projectile using the in-flight spin rate and a forward velocity of the guided projectile, determining that the gyroscopic stability factor exceeds a stability threshold, and spin-braking the guided projectile, in response to determining that the gyroscopic stability factor exceeds a threshold value, by braking rotation of the despun control portion by which the gyroscopic stability factor of the guided projectile is reduced to a second gyroscopic stability factor.

Abstract: A three-dimensional imaging system and method based on rotational scanning is disclosed. The system includes a column-shaped frame with a column-shaped side; a transceiving antenna array element arranged on the column-shaped side that transmits a micro-wave detection signal to a detected object located in the column-shaped frame and receives an echo signal reflected back from the detected object; a signal transceiving device that generates the micro-wave detection signal and sends same to the transceiving antenna array element and processes the echo signal; a rotation control device that controls rotational movement of the transceiving antenna array element so that the transceiving antenna array element transmits the micro-wave detection signal to the detected object in a plurality of angles; and a positioning trigger fixedly arranged on the column-shaped frame and configured to trigger the signal transceiving device when the transceiving antenna array element arrives at a position of the positioning trigger.

Abstract: Methods and a device for imaging objects including unsupervised classifying and data analyzing of the object to detect and identify the structure of the object and further display the object's structure underlying structure, for example the arrangement of and relationships between the parts or elements of the object by using a location module configured to record the physical location of an antenna array.

Abstract: Various avionics systems may benefit from appropriate integration of distance measurement equipment, traffic collision avoidance systems, and transponders, with the distance measurement equipment using a dedicated antenna. A system can include a transponder processor. The system can also include a top antenna receiver configured to connect to a top antenna. The transponder processor can be configured to communicate using the top antenna. The system can also include a bottom antenna receiver configured to connect to a first bottom antenna, wherein the transponder processor is configured to communicate using the first bottom antenna. The system can further include a distance measure equipment processor integrated with the transponder processor and configured to measure distance using a second bottom antenna.

Abstract: A device for estimating a distance based on object detection and a method thereof are provided. The device for estimating a distance based on object detection according to an embodiment of the present disclosure includes a fusion sensor including a first sensor configured to detect positions of a plurality of objects in front of a host vehicle and a second sensor configured to capture a front image of the host vehicle, and a controller communicatively connected to the fusion sensor and configured to recognize all radar tracks corresponding to distances detected by the first sensor and all vision tracks corresponding to distances detected by the second sensor, assign adjacent vision tracks for each of the radar tracks to one cluster, and correct distances of all the vision tracks assigned to the corresponding cluster based on the closest vision track from the radar track for each cluster.

Abstract: In one aspect, a system for determining subsurface soil layer characteristics as an agricultural implement is towed across a field by a work vehicle may include a RADAR sensor configured to capture data indicative of a subsurface soil layer characteristic of the field. Furthermore, the system may include a load sensor configured to capture data indicative of a load applied to the agricultural implement by soil within the field, with the load being indicative of the subsurface soil layer characteristic. Additionally, a controller of the system may be configured to determine a first value of the subsurface soil layer characteristic based on the data received from the RADAR and a second value of the subsurface soil layer characteristic based on the data received from the load sensor. Moreover, the controller may be configured to determine a differential between the first value and the second value.

Abstract: An object recognition apparatus groups reflection points detected by a radar device, and recognizes an object around the own vehicle, based on a radar-based target detected using the grouped plurality of reflection points and an image-based target detected using an image captured by an image capturing device. The object recognition apparatus includes a reflection point acquiring unit that acquires reflection point information related to the grouped plurality of reflection points, and an object determining unit that determines that a plurality of objects have been detected as a single object by the radar device, based on the reflection point information acquired by the reflection point acquiring unit and the information on the image-based target, if the image-based target detected by the imaging device includes an image-only target not detected by the radar device.

Abstract: Computer assistance in interval management may be beneficial in a number of ways. For example, digital communication of interval management instructions or information related to interval management may beneficially be communicated to aircraft with respect to other aircraft. This information may be communicated overlaid on air traffic control (ATC) communications, or otherwise. A method can include, for example, obtaining a spacing goal for an aircraft relative to a target aircraft. The method can also include determining clearance instructions for the aircraft, wherein the speed guidance is based on the spacing goal. The method can further include transmitting the clearance instructions in a computer-readable format to the aircraft. The instructions can be provided by an overlay-modulated signal of a provided modulated ATC signal. The instructions can be configured to enable control of the aircraft to achieve the spacing goal.