Abstract: The present disclosure relates to a radar system and a transmission apparatus therefor, including a signal generator for generating a first signal; a phase adjuster configured to include a plurality of input ports and at least one output port, to generate a second signal by adjusting the phase of the first signal according to an input port through which the first signal is transmitted among the plurality of input ports, and to output the generated second signal to an antenna unit; and a port selector configured to select at least one of the plurality of input ports of the phase adjuster according to an identification code and to transmit the first signal through the selected input port so that a transmission signal radiated through the antenna unit is phase inverted or formed in a pattern corresponding to the identification code, so that interference by the other radar system can be minimized, and the accuracy, reliability and frequency efficiency of the radar system can be improved.

Abstract: A system, computer program product and method of examining the ionosphere is disclosed. The method includes capturing, at one or more antennas, radio frequency (RF) emissions preceding a broadband emission event. The RF emissions are then recorded at one or more broadband receivers over a period of time. A first tuning of the received RF emissions is selected to detect ionospheric reflections, and a second tuning of the received RF emissions is selected to detect direct line of sight emissions. From the selected tunings, an amplitude or complex time series of the second tuning with one or more channels of the first tuning are correlated to calculate a relative virtual echo height of the ionosphere.

Abstract: A radar device is provided that includes a timing control component operable to generate, for each chirp of a sequence of chirps according to a set of chirp configuration parameters and a chirp profile for the chirp, chirp control signals to cause the radar device to transmit the chirp, the timing control component having chirp configuration parameter inputs, chirp profile parameter inputs, a chirp address output, and chirp control signal outputs, a chirp configuration storage component having chirp configuration parameter outputs coupled to corresponding inputs of the configuration parameter inputs of the timing control component, a chirp profile address output, and a chirp address input coupled to the chirp address output, and a chirp profile storage component having chirp profile parameter outputs coupled to the chirp profile parameter inputs of the timing control component; and a chirp profile address input coupled to the chirp profile address output.

Abstract: This invention related to a method of and system for detecting a threat, particularly a threat to a vehicle associated with an explosive blast and/or detonations. The method typically comprises receiving electromagnetic signals, or data indicative thereof, via a suitable electromagnetic detector arrangement from a target area adjacent the vehicle, as well as receiving optical signals, or data indicative thereof, via a suitable optical sensor arrangement also from a target area adjacent the vehicle. The method then comprises generating a threat detect output in response to receiving an optical signal indicative of a threat subsequent to receiving an electromagnetic signal indicative of a threat. The system typically implements the method as described. The invention also extends to a vehicle comprising a system in accordance with the invention.

Abstract: There is provided an apparatus and method for disrupting radar systems. The apparatus comprises a chamber (110) for attachment to a vehicle, a radar countermeasure material (130) in the chamber, the radar countermeasure material comprising a plurality of hollow fibres, wherein the inner surface of at least some of the hollow fibres is at least partly coated with a conductive substance, and a release means (140) for dispensing the radar countermeasure material out of the chamber.

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 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: Disclosed herein are system, method, and computer program product embodiments for detecting spoofing of a navigation device. A plurality of anti-spoofing techniques are provided. The plurality of anti-spoofing techniques detect interference with data provided by one or more navigation devices for a plurality of threat situations. Positioning, timing and frequency characteristics associated with the one or more navigation devices are analyzed in order to identify a threat situation among the plurality of threat situations. Based on the identified threat situation one or more of the anti-spoofing techniques are executed. The one or more anti-spoofing techniques can be executed in parallel in order to provide various anti-spoofing detection techniques at the same time.

Abstract: A positioning method includes: obtaining first time information of a first to-be-positioned node, second time information of a second to-be-positioned node, position information of at least three collaborative nodes with known positions, and third time information of the at least three collaborative nodes with known positions; and determining position information of the first to-be-positioned node and position information of the second to-be-positioned node according to the first time information, the second time information, the third time information, and the position information of the at least three collaborative nodes with known positions.

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).

Abstract: An in-vehicle radar device includes a transmission section, a reception section, an analysis section, an extraction section, a speed calculation section, a distance calculation section, and a folding detection section. The folding detection section detects occurrence of erroneous calculation of a distance, when reflection intensity at a frequency peak obtained by the extraction section is smaller than a preset intensity threshold for a distance calculated by the distance calculation section and a frequency width in a frequency spectrum calculated by the analysis section is smaller than a preset width threshold.

Abstract: In one embodiment, a method, apparatus, and system for vehicle-to-vehicle communication based on radar communication is disclosed. The operations comprise: detecting, with at least one sensor deployed at a first vehicle, a first obstacle; receiving, at the first vehicle, a radar signal from a second vehicle, wherein an unobstructed line-of-sight exists between the first vehicle and the second vehicle; and transmitting, from the first vehicle, and in response to the radar signal from the second vehicle, a first information relating to the first obstacle to the second vehicle, wherein the transmission is received by a second radar deployed at the second vehicle, and wherein an unobstructed line-of-sight does not exist between the second vehicle and the first obstacle.

Abstract: A method for operating a stepped frequency radar system is disclosed. The method involves performing stepped frequency scanning across a frequency range using frequency steps of a step size, the stepped frequency scanning performed using at least one transmit antenna and a two-dimensional array of receive antennas, changing at least one of the step size and the frequency range, and performing stepped frequency scanning using the at least one transmit antenna and the two-dimensional array of receive antennas and using the changed at least one of the step size and the frequency range.

Abstract: A method for a radar apparatus is described. According to one example implementation, the method involves receiving a multiplicity of chirp echoes from transmitted radar signals and generating a digital signal based on the multiplicity of chirp echoes. In this case, each chirp echo has an associated subsequence of the digital signal. The method further involves performing a filtering in the time domain for one or more subsequences. The filtering in this case involves the decomposition of the subsequence into a plurality of components (referred to as principal components), the selection of a subset of components from the plurality of components and the reconstruction of a modified subsequence based on the selected subset of the component.

Abstract: A FMCW radar system with a built-in self-test (BIST) system for monitoring includes a receiver, a transmitter, and a frequency synthesizer. A FMCW chirp timing engine controls timing of operations at least one radar component. The BIST system includes at least one switchable coupling for coupling a first plurality of different analog signals including from a first plurality of selected nodes in the receiver or transmitter that are all coupled to a second number of monitor analog-to-digital converters (ADCs). The second number is less than (<) the first plurality of different analog signals. The BIST system includes a monitor timing engine and controller operating synchronously with the chirp timing engine, that includes a software configurable monitoring architecture for generating control signals including for selecting using the switchable coupling which analog signal to forward to the monitor ADC and when the monitor ADC samples the analog signals.

Abstract: A radar system for mobile applications includes transmitters and receivers. The transmitters are configured for installation and use in a mobile application. Each of the transmitters is configured to generate a radio signal. The receivers are configured for installation and use in the mobile application. Each of the receivers is configured to receive radio signals that include transmitted radio signals transmitted by the transmitters and reflected from objects in the environment. A first transmitter of the transmitters is configured to frequency modulate the transmitted radio signal using a shaped frequency pulse which is defined by a sequence of chips. The sequence of chips is selected to realize a selected frequency pulse shape.

Abstract: Techniques are provided for determination of a guided-munition orientation during flight based on lateral acceleration, velocity, and turn rate of the guided-munition. A methodology implementing the techniques, according to an embodiment, includes obtaining a lateral acceleration vector measurement and a velocity of the guided-munition, and calculating a ratio of the two, to generate an estimated lateral turn vector of the guided-munition. The method also includes integrating the estimated lateral turn vector, over a period of time associated with flight of the guided-munition, to generate a first type of predicted attitude change. The method further includes obtaining and integrating a lateral turn rate vector measurement of the guided-munition, over the period of time associated with flight of the guided-munition, to generate a second type of predicted attitude change.

Abstract: A radar system includes a transmitter, a receiver, and a processor. The transmitter is configured to transmit a radio signal. The receiver is configured to receive a radio signal which includes the transmitted radio signal reflected from an object in the environment. The processor is configured to control the transmitter and the receiver to at least one of mitigate interference in the received radio signals, and avoid interfering radio signals transmitted by another radio transmitter.

Abstract: An aspect of the present disclosure is directed to and provides radar-reflecting systems and apparatus that employ metasurfaces to produce enhanced radar cross sections that are greater than those produced by the geometry of the surfaces alone. Another aspect of the present disclosure is directed to and provides heat-ducting systems and apparatus that include metasurfaces. A further aspect of the present disclosure is directed to and provides cards with metasurfaces. Exemplary embodiments utilize fractal plasmonic surfaces for a metasurface.

Abstract: An optical seeker assembly having an optical detector located within the wing or canards of a precision guided munition. The optical seeker provides on-wing processing that generates low bandwidth detection data that can be easily transferred to a primary CPU located within the main body or fuselage of the precision guided munition. The on-wing processing reduces or eliminates the need for optical fibers extending between an optical wedge and an optical detector to reduce the likelihood of optical fibers from impeding in the mechanical deployment of the wing and reduces losses. The reduction or elimination of optical fibers between the optical wedge and the optical detector further enables the optical detection assembly to have a higher pixel ratio or transmitting raw data between the wedge and the detector by sending sampled detection data across a low bandwidth link to a CPU in the main body.

Abstract: An automotive spread MIMO-configured radar system has a plurality of transceiver antenna units for transmitting mutually orthogonal radar waves. Each transceiver antenna unit has a plurality of range gates to indicate a range detected by the transceiver antenna unit. At least one specific transceiver antenna unit (TRx1) is configured to transmit a reference signal received directly by at least one transceiver antenna unit (TRx2) that is separated by an a priori known distance from the specific transceiver antenna unit (TRx1). An evaluation and control unit is configured for reading out the plurality of range gates for the transceiver antenna unit (TRx2), and, based on the read-out range gate that indicates the received reference signal and based on the a priori known distance, for synchronizing the specific transceiver antenna unit (TRx1) and the transceiver antenna unit (TRx2) that received the reference signal and/or for correcting a measured Doppler shift.