Abstract: An FM-CW radar includes a high frequency circuit that receives a reflected wave from a target, and a signal processing unit that converts an analog signal generated by the high frequency circuit into a digital signal and detects at least a distance to the target and velocity of the target. The high frequency circuit includes a VCO that receives a modulation voltage from the signal processing unit and generates a frequency-modulated high frequency signal. The signal processing unit includes an LUT that stores default modulation control data. The signal processing unit applies a default chirp having a linear characteristic, calculates an initial frequency value and an initial voltage value from a voltage-frequency characteristic manifested by the application of the default chirp, generates time data using a result of the calculation, and updates the data stored in the LUT with the time data generated.

Abstract: A filter apparatus has a first filter and a second filter. The first filter receives at least an up signal of a non-linear signal of which a single cycle is a predetermined period that includes an up interval and a down interval. In the up interval, a signal level non-linearly rises along a time axis. In the down interval, the signal level non-linearly falls along the time axis. The up signal is a signal in the up interval of the non-linear signal. The first filter performs linearization of the received up signal by improving linearity of the received up signal. The second filter receives at least a down signal of the non-linear signal. The down signal is a signal in the down interval of the non-linear signal. The second filter performs linearization of the received down signal by improving linearity of the received down signal.

Abstract: Provided are systems, methods, and computer-readable storage media for improving accuracy of GPS in luminaires. For example, in one embodiment, there is provided a method that includes receiving, at a controller coupled to a luminaire, a GPS message. The method further includes extracting information from the GPS message, the information including data associated with a plurality of coordinates. Furthermore, the method can include determining, based on the information and not from the coordinates, an error associated with each coordinate of the plurality of coordinates. The method can also include discarding coordinates for which the error fails to satisfy a predetermined condition. Moreover, the method can include selecting, as a location of the luminaire, the coordinates for which the error satisfies the predetermined condition.

Abstract: A method comprising receiving, by an apparatus, global-positioning-system data from a plurality of global-positioning-system satellites, determining a measured satellite pseudorange for each global-positioning-system satellite of the plurality of global-positioning-system satellites based, at least in part, on the global-positioning-system data, receiving, by the apparatus, of non-global-positioning-system data from at least one sensor, determining an apparatus position of the apparatus based, at least in part, on the non-global-positioning-system data, the determination of the apparatus position being absent consideration of any global-positioning-system data, determining at least one pseudorange correction associated with at least one global-positioning-system satellite of the plurality of global-positioning-system satellites based, at least in part, on the measured satellite pseudorange and the apparatus position, and causing broadcast transmission of information indicative of the pseudorange correction is

Abstract: A method is provided for mounting a plurality of radar units to a vehicle. The method involves determining, for each radar unit, a measured pitch direction and a measured yaw direction based on data obtained using a photogrammetry system. The method also involves determining yaw angles between at least two of the radar units based on at least one of the measured yaw directions. The method also involves determining, for each radar unit, a pitch offset and a yaw offset. The method also involves adjusting at least one of the radar units based on at least one of the determined pitch offsets and at least one of the determined yaw offsets. Also provided is a device for performing the method.

Abstract: A transponder system is presented, comprising first and second antenna arrays each comprising a plurality of antenna elements arranged in a predetermined geometry. The antenna elements of the first antenna array are respectively interconnected with corresponding antenna elements of the second antenna array by respective connection lines thereby forming plurality of receiving-transmitting pairs of antenna elements. A receiving-transmitting pair is configured to receive an input electro-magnetic signal by one antenna element thereof and transmit a corresponding output signal by the other antenna element, thereby enabling collective collection of a signal waveform and transmission of a corresponding output signal waveform. The first and second antenna arrays are rotatable with respect to one another about at least one predetermined rotation axis, thereby enabling variation of direction of propagation of the output signal waveform with respect to direction of propagation of the collected signal waveform.

Abstract: A PNT sensor short-range relay communication system includes an electronic PNT sensor module configured to determine a first position of the PNT sensor module and to output a PNT signal indicating a second position of the PNT sensor module with respect to the first position. A mobile relay module is in signal communication with the PNT sensor module. The mobile relay module is configured to communicate the PNT signal to at least one terminal device located remotely from the PNT sensor module and the mobile relay module. In this manner, positional information can be determined without relying on a satellite navigation system.

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: 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 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: 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: 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.