Abstract: An automotive radar system and method transmit a plurality of radar signals into a region, detect reflected radar signals, and convert the reflected radar signals into digital data signals. A plurality of range-Doppler maps for the region are generated from the digital data signals, and the plurality of range-Doppler maps are averaged to generate an averaged range-Doppler map for the region. Data points in the averaged range-Doppler map are analyzed to detect blobs in the averaged range Doppler map. If a blob is detected in the averaged range-Doppler map, the radar detector is indicated to be unblocked.

Abstract: A sparse multichannel array includes a plurality of array elements, a receiver behind each array element, and a Doppler filter bank behind each receiver, whereby within each Doppler bin is placed spatial nulls at selected angles of undesired interference. The invention enables Doppler processing to be performed on sparse arrays, such as nested or coprime arrays, used in nonlinear adaptive beamforming to mitigate the impact of unintentional interference and hostile jamming on the received signal.

Abstract: A radar apparatus comprises a signal transmission unit, a signal reception unit, a determination unit, and a target detection unit. The signal transmission unit transmits a transmission signal for detecting a target object. The signal reception unit receives a reception signal generated when the transmission signal is reflected. The determination unit determines a presence of a clutter structure using frequency response information of the reception signal. The target detection unit detects a target object by correcting a detection threshold value for detecting a target object according to the determination result on the presence of the clutter structure and detects a target object.

Abstract: A radar device comprises a transmitter, a receiver, a first radar image production component, a second radar image production component, a display component, and an echo width adjuster. The transmitter transmits a pulse signal. The receiver receives an echo signal during a transmission and reception period of the pulse signal. The first radar image production component produces a radar image of a first display range on the basis of the echo signal. The second radar image production component produces a radar image of a second display range that is wider than the first display range on the basis of the echo signal. The display component selectively or simultaneously displays the radar image of the first display range and the radar image of the second display range. The echo width adjuster adjusts pulse width of echo included in the radar images or the echo signal according to the display range of the radar image.

Abstract: An automobile radar module and method include a PCB having a first side on which RF electronic components are mounted and a second side on which digital electronic components are mounted. An EMI shield is mounted over the first side of the PCB, and a radome is mounted over the EMI shield. The EMI shield comprises an aperture exposing RF components on the first side of the PCB. The radome comprises a protrusion which protrudes into the aperture in the EMI shield. The protrusion and sidewalls of the aperture define a shielded region above the RF components on the first side of the PCB. The sidewalls extend at an acute angle with respect to a plane of the primary surface of the EMI shield, the acute angle being selected based on operational parameters of the radar module such that a predetermined shielding performance is realized.

Abstract: An integrated circuit for saturation detection comprises: a plurality of gain components; a plurality of saturation detectors with each saturation detector operably coupled to an output of one of the gain components; a plurality of logic elements with a first input of each logic element associated with an output of one of the saturation detectors; and a controller operably coupled to the plurality of logic elements. The controller is arranged to apply a signal to a second input of individual ones of the plurality of logic elements such that an output of the respective logic element identifies a saturation event of the saturation detector associated with that respective logic element.

Abstract: In a method for distinguishing between real obstacles and apparent obstacles using a driver assistance system for motor vehicles equipped with a position finding system for determining one's own location, as well as a radar sensor for measuring the distances and relative velocities of radar targets, positional information for radar targets recognized as apparent obstacles is stored in a database, and when the driver assistance system recognizes a stationary radar target at a specific location, the driver assistance system queries the database whether an apparent obstacle is stored for this location.

Abstract: Various techniques are disclosed for providing a radar system. In one example, such a radar system includes a radar unit adapted to broadcast radar signals and receive return signals in response thereto. The radar unit includes a waveform generator adapted to provide pulse waveforms of different pulse widths and Frequency Modulated Continuous Wave (FMCW) waveforms, wherein the waveforms are interleaved with each other to provide a transmission sequence for the radar signals for detection of long range and short range targets, a power amplifier adapted to amplify the radar signals for broadcast, and an antenna adapted to broadcast the radar signals and receive the return signals. Other examples of radar systems and related methods are also provided.

Abstract: A novel methodology for automatically linearizing a harmonic radar transmitter—termed Feed-Forward Filter Reflection (FFFR)—is disclosed. The method combines the reflected second harmonic from a filter with the signal passing directly through the filter. The second harmonic from these two paths are combined with equal and opposite amplitudes to reduce the second harmonic beyond filtering alone. This methodology has been experimentally verified at transmit frequencies between 800 and 1000 MHz. Implemented properly, the technique provides greater than 100 dB rejection between 1.6 and 2.0 GHz. Although the tuning has been automated, further optimization is possible. Automated tuning is demonstrated over 400 MHz of bandwidth with a minimum cancellation of 110 dB. One application for the harmonic cancellation is to create a linear radar transmitter for the remote detection of non-linear targets.

Abstract: A target detection system and a method of performing radar target detection are described. The system includes a radar system to obtain radar echoes from a target with multiple point reflectors. The system also includes a processor to obtain a cluster of multi-dimensional point spread function from the radar echoes, each multi-dimensional point spread function being associated with a reflection from one of the multiple point reflectors, and also to perform object detection based on three or more dimensions of each of the multi-dimensional point spread functions of the cluster.

Abstract: Method for determining distances and relative velocities of simultaneously located objects using an FMCW radar, in which the frequency of a transmission signal is modulated in the form of periodically recurring ramps, the transmission signal is mixed with a received signal to form an intermediate frequency signal and, for determining the distance and/or the relative velocity of the objects, the change in the phase of the intermediate frequency signal is evaluated from one ramp to the next characterized in that the modulation pattern includes at least two ramps, which differ only by a fixed frequency offset and follow one another in a certain time interval, and an unambiguous approximate value is calculated for the object distance on the basis of the phase difference ?1??2 of the intermediate frequency signals for these two ramps.

Abstract: A method and system are described for measuring displacements and vibrations of an object/structure. The method includes transmission of at least one radar wave by a single radar device positioned at a predefined distance from a receiver device applied on the object/structure, reception, by the radar device, of a complex signal consisting of the sum of the signal reflected from said receiver device and of one or more interfering signals generated by one or more corresponding targets substantially stationary and substantially positioned at the same distance from the radar device, separation of the interfering signals from the reflected signal. The separation includes calibration by induction, for a pre-determined period of time, of a vibrational motion having a known frequency and duration in the receiver device, which consequently operates as a calibration device, for obtaining an estimated value of the interfering signals.

Abstract: A method is provided for use of a segmented aperture communications system to determine a direction of arrival of a radio signal in which the system includes a receiver plane having equally spaced and planar aligned radio frequency ports. Computation of the aperture segments depends on the port coordinates where the geometric relationship of the segments is used to determine a time delay and direction of arrival of the signal. The ports receive at least two orthogonal polarizations that characterize the incoming signals. A central port is used as reference to determine a phase difference associated at each port. Two angles are calculated by a simultaneous solution of two phase difference measurements to determine the direction of arrival solution. A mean direction of arrival solution is obtained by averaging solution estimates that are obtained by repeating the direction of arrival determination using random port pairs.

Abstract: A radar apparatus includes a signal processor configured to: derive the target data set of the target, in a predetermined time cycle, based on a reception signal acquired by receiving a reflection wave from the target; detect, based on the target data set, a side wall along a current lane in which the host vehicle is traveling; determine whether or not there is a continuity between a previous target data set and a latest target data set, and in a case where there is no continuity between the previous target data set and the latest target data set, perform “extrapolation;” determine based on a frequency of the “extrapolation” whether or not the target associated with the target data set is an upper object overhead of the vehicle and with which the vehicle cannot collide.

Abstract: A radar sensor for emitting and/or receiving wave-shaped electromagnetic signals, having at least one housing and at least one absorber. The absorber is disposed inside the housing and a surface of the absorber has raised rib-like sections which are disposed adjacently to one another on the surface of the absorber. The absorber is an injection molded component.

Abstract: A system for detection and orbit determination of Earth orbiting objects includes a first plurality of sensors including at least one first antenna. The at least one first antenna is configured to point in a stare mode to broadcast a first detection signal at an angular region centered on an equatorial plane to maximize detection of orbiting objects regardless of altitude, grade, or inclination. The first antenna may be configured to stare at a low inclination angle, and may be configured to stare at one of due east and due west along the equator.

Abstract: A method for providing information about at least one object in a surrounding area of a motor vehicle of a vehicle fleet is provided. The information in the motor vehicle is detected and, together with position data of the motor vehicle is transmitted and provided to a traffic information collection device. The information having at least one first geographic location of the object and a second geographical position of the object is provided and the second geographical position is determined and provided depending on the first geographical position.

Abstract: A system and method for projecting target tracks produced by a remote tracker onto a surface of the Earth to obtain projected tracks is provided. Projection bias in a projected track from the remote tracker projected onto a planar map is removed by computing a discrete Frechet distance from a polygonal curve associated with a track derived from the remote tracker to a corresponding polygonal curve on the planar map. A correspondence between the projected track and a track on the planar map is automatically established. A projection bias is removed based on the correspondence.

Abstract: A method for measuring a permittivity (?) of a material (30) includes following steps. A sensing rod (14) of a material level sensor (10) inserts into a tank (20). The material level sensor (10) proceeds with a material level measurement of the material (30) to obtain a first feature value. The material level sensor (10) is vertically moved with a vertical distance (Hair). The material level sensor (10) proceeds with the material level measurement to obtain a second feature value, and subtracts the first feature value by the second feature value to obtain a feature value variation, and calculates the feature value variation to obtain the permittivity (?) of the material (30).

Abstract: The present invention relates to a radar level gauge system for a tank having a tubular mounting structure. The radar level gauge system comprises a transceiver; a single conductor probe extending through the tubular mounting structure; an electrically conductive shielding structure radially spaced apart from the single conductor probe and extending along the single conductor probe inside the mounting structure; a connecting member extending radially from the shielding structure to electrically couple the shielding structure to the tank; and processing circuitry connected to the transceiver for determining the filling level.