Abstract: A lane detection method and a lane detection system mounted on a first vehicle are provided. The methods includes: calculating on which lane a first vehicle is located based on vehicle-to-vehicle data received by the first vehicle from at least one neighboring vehicle, where the neighboring vehicle means another vehicle located within a vehicle-to-vehicle communication range of the first vehicle. The system may include: a communication device for receiving vehicle-to-vehicle data from at least one neighboring vehicle, and a processing device for calculating on which lane the first vehicle is located based on the vehicle-to-vehicle data received by the communication device, where the neighboring vehicle means another vehicle located within a vehicle-to-vehicle communication range of the first vehicle. Lane detection may not rely on marks on roads which are inherently not clear or blur due to a bad weather.

Abstract: An angle-resolving FMCW radar sensor, including multiple antenna elements in positions in a direction in which the radar sensor is angle-resolving and forming at least three transmitter arrays and at least one receiver array, and a control/evaluation device for an operating mode in which transmitter arrays periodically transmit signals whose frequency is modulated according to modulation ramps, and in which radar echoes of transmitted signals are received in by multiple antenna elements of the receiver array, and the located object angle is determined based on amplitude and/or phase relationships between radar echoes which correspond to different combinations of transmitter and receiver arrays. A measuring cycle of the radar sensor includes at least two periods in which in each case at least two combinations of transmitter and receiver arrays are alternated, and the combinations of transmitter and receiver arrays involved are different from one another for the at least two periods.

Abstract: A radar sensing system for a vehicle includes a transmitter configured for installation and use on a vehicle and able to transmit radio signals. The radar sensing system also includes a receiver and a processor. The receiver is configured for installation and use on the vehicle and is able to receive radio signals that include transmitted radio signals reflected from objects in the environment. The processor samples the received radio signals to produce a sampled stream. The processor processes the sampled stream such that the sampled stream is correlated with various delayed versions of a baseband signal. The correlations are used to determine an improved range, velocity, and angle of targets in the environment.

Abstract: A system and a method for identifying and tracking unacknowledged marine vessels. The system includes a sensing system having one or more observation platforms positioned remotely above one or more marine vessels, each with a navigation system, and one or more payloads coupled to the observation platform(s). The payloads have one or more optical receivers to observe, geolocate, and receive optical emissions from the marine vessels to detect optical signatures. The payloads have one or more AIS receivers to observe, geolocate, and receive AIS emissions from the marine vessels to detect AIS signatures. The payloads have one or more RF receivers to receive RF emissions from the marine vessels to detect RF signatures. The payloads have at least one processor with an analysis software to process and analyze the optical, AIS, and RF signatures, to identify and track one or more unacknowledged marine vessels from the marine vessels.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed for distributed, multi-node, low frequency radar systems for degraded visual environments. An example system includes a transmitter to transmit a radar signal. The example system includes a distributed network of radar receivers to receive the radar signal at each receiver. The example system includes a processor to determine a first range and a first angular position of a background point based on return time, wherein the first range and the first angular position are included in first data; determine a second range and a second angular position of the background point based on doppler shift, wherein the second range and the second angular position are included in second data; determine a refined range and a refined angular position, wherein the refined range and refined angular position are included in third data, and generate a radar map based on third data.

Abstract: A ranging and positioning system comprising transmitters and receiver nodes communicating together by chirp-modulated radio signals, that have a ranging mode in which ranging exchange of signals takes place between a master device and a slave device that leads to the evaluation of the range between them. The slave is arranged for recognizing a ranging request and transmit back a ranging response containing chirps that precisely aligned in time and frequency with the chirps in the ranging requests, whereupon the master can receive the ranging response, analyze the time and frequency the chirps contained therein with respect to his own time reference, and estimate a range to the slave.

Abstract: A device and a method for determining the position of an object, in particular of a moving object, in a three dimensional space is made available. Here the device comprises at least two switchable transmitting antenna arrays having different vertical beam alignments and a number of receiving antennas arranged in a row. The transmitting antennas are arranged spaced apart by a distance that corresponds to the distance between the outer phase centers of the receiving antennas. Otherwise the transmitting antennas can be positioned arbitrarily around the receiving antenna. The horizontal beam sweep over a wide angle range is implemented by the “digital beam forming” method. The vertical object position is measured by comparing the amplitude of the received signals with sequentially operated transmitting antennas having different vertical beam directions.

Abstract: A surveillance apparatus for determining a position of an object in a field of view, comprising a radar sensor having at least one transmitting antenna configured to transmit electromagnetic radiation and a plurality of receiving antennas configured to receive electromagnetic radiation including a reflection signal of the object, wherein the antennas form an antenna array, and a processing unit connected to the radar sensor to receive signals from the receiving antennas corresponding to the received electromagnetic radiation, wherein the processing unit is configured to estimate a distance and a direction of the position of the object in the field of view with respect to the radar sensor, wherein the processing unit is configured to estimate the distance and the direction separately on the basis of a maximum likelihood based algorithm.

Abstract: A measuring system for determining a directional characteristic of a first signal is provided. The device under test comprises sensor means for determining its position and/or orientation. The measuring system comprises positioning means for positioning and/or orienting the device under test, and a measuring device. The position and/or orientation are transmitted by the device under test to the measuring device. The measuring device comprises antenna means for receiving or sending the first signal and processing means for processing the position and/or orientation information. The processing means determine the directional characteristic at least from the position and/or orientation.

Abstract: Apparatuses, methods, and systems are described for a receiver of signals from one or more satellite navigational systems to detect and/or eliminate impaired satellites/signals and/or “false positives” from the set of satellites being estimated/acquired. One method includes acquiring coarse position, time, and frequency values for each of a plurality of satellites from one or more satellite navigational systems and then selecting a set of satellites based on whether one or more of their corresponding acquired coarse values are within a minimum range. An intersection point of the position domain correlograms generated from vectors of each satellite in the selected set is determined and, using that intersection point, satellites/signals are eliminated from the selected set of satellites.

Abstract: A security system comprises a line array of antenna elements configured to transmit electromagnetic radiation and to receive scattered electromagnetic radiation scattered back from an object and an automatic movement element that automatically moves between at least two positions to perform a predetermined function. Said line array is mounted to said automatic movement element to transmit electromagnetic radiation to and receive scattered electromagnetic radiation from a screening area in front of and/or behind the automatic movement element. A controller controls said antenna elements to transmit electromagnetic radiation and to receive scattered electromagnetic radiation at a plurality of positions of the automatic movement element.

Abstract: An integrated circuit (IC) is provided with a plurality of diode based mm-wave peak voltage detectors (PVD)s. During a testing phase, a multi-point low frequency calibration test is performed on one or more of the PVDs to determine and store a set of alternating current (AC) coefficients. During operation of the IC, a current-voltage sweep is performed on a selected one of the PVDs to determine a process and temperature direct current (DC) coefficient. A peak voltage produced by the PVD in response to a high frequency radio frequency (RF) signal is measured to produce a first measured voltage. An approximate power of the RF signal is calculated by adjusting the first measured voltage using the DC coefficient and the AC coefficient.

Abstract: A method for determining a distance upper bound by a verifier device is described. The method includes measuring a first round-trip time to receive a first response from a target device corresponding to a first message sent to the target device. The method also includes measuring a second round-trip time to receive a second response from the target device corresponding to a second message sent to the target device, the second response being delayed by a processing time multiplier. The method further includes determining a transit time measurement based on the first round-trip time, the second round-trip time and the processing time multiplier. The method additionally includes determining the distance upper bound based on the transit time measurement.

Abstract: Directional transmission in a mobile ad-hoc network includes receiving position data for peer nodes in the network. When transmitting a data packet to a peer node, the position of the peer node is determined with reference to a position database. An electronically steerable antenna is focused to transmit to the position and the packet is transmitted. The electronically steerable antenna is then placed in an omnidirectional mode to receive packet transmissions.

Abstract: Methods for reducing the resources needed to detect and identify faulty pseudorange measurements in a GNSS receiver are described. In a Receiver Autonomous Integrity Monitoring (RAIM) method, a position solution is calculated using a weighted least squares method on measurements from satellites of one or more GNSS constellations. A test statistic is calculated from residuals and a threshold is calculated based on a probability function. If the test statistic is greater than or equal to the threshold, a subset is selected from the set of pseudorange measurements using a metric indicative of possible measurement error. A measurement is selected from the subset using a metric indicative of signal strength or some other metric and discarded from the set of pseudorange measurements. If the number of measurements remaining in the set of pseudorange measurements is greater than five, the method loops back to the step of calculating a position solution.

Abstract: A measuring system comprises a model generation unit and a signal generator. The model generation unit is adapted to generate a signal model based upon received global navigation satellite system reception data. The signal generator is adapted to generate a measuring signal based upon the signal model and to supply a device under test with the measuring signal.

Abstract: A system for phase calibration of an antenna array comprises at least two antenna elements. The system furthermore comprises a device under test comprising the antenna array, a plane wave converter, and a phase measuring unit. Whereas the device under test is configured to transmit or receive a test signal with spatially dependent phase, the plane wave converter is configured to convert the test signal with spatially dependent phase into a signal with constant phase. In addition to this, the device under test or the phase measuring unit is configured to derive calibration values for the phase calibration of the antenna array from the signal with constant phase.

Abstract: Methods and systems for a precision Doppler-based airborne platform velocity measurement system are presently disclosed. An example method comprises transmitting a radar signal with an antenna of an airborne platform. The method also includes receiving at least one radar reflection with the antenna. As part of the method, one or more processors may be configured to determine (i) a falling edge of a Doppler signature of the received radar reflection and (ii) a signal representative of an airspeed based on the falling edge of the Doppler signature. Additionally, the method includes providing the determined signal to an inertial measurement system. Further, the method includes determining location parameters of the airborne platform by the inertial measurement system, including determining at least one sensor adjustment for the inertial measurement unit based on the determined signal. Finally, the method includes operating the inertial measurement system with the sensor adjustment.

Abstract: A method for operating a radar sensor in which the radar sensor is provided with a signal generating device. The signal generating device generates an outgoing signal as a radar signal that is to be emitted. The radar sensor also includes a signal receiving device for receiving and processing received signals as reflected radar signals. The outgoing signal is generated within a predefinable frequency band. The received signals are monitored for the presence of an interference disruption. When an interference disruption has been detected, the frequency band for the generation of the outgoing signal is at least temporarily reduced in terms of the bandwidth.

Abstract: An antenna includes first and second conductive plates disposed to face each other, a dielectric disposed between the first and second conductive plates, and a plurality of via holes which penetrate the first and second conductive plates and the dielectric. A first emission cavity and a plurality of second emission cavities which emit radio waves are formed by the plurality of via holes and the first and second conductive plates.