Abstract: Clothing for shielding a person from radio frequency energy relating to an electronic device includes a garment adapted to be worn by the person that includes at least one pocket having an inner panel and an outer panel. The pocket is sized to bold the electronic device. The inner panel of the pocket includes an electrically conductive shield material.

Abstract: In a method for cyclically measuring distances (d) and relative velocities (v) of objects using an FMCW radar sensor, the frequency (f) of a transmitted signal of the radar sensor is periodically modulated, each period (P) including at least two differing modulation patterns, a relationship between distance (d) and velocity (v) of the object being derived from a signal received for a single modulation pattern, and the signals received for multiple modulation patterns being adjusted to one another in order to determine one value each for the distance and the velocity per each measuring cycle. For the adjustment between a signal obtained for a modulation pattern in the instantaneous measuring cycle and the signal(s) obtained for other modulation patterns, the signals from at least one previous measuring cycle are utilized.

Abstract: The invention relates to a method for determining the roll angle of a guidable and substantially or partially roll-stable projectile comprising control system, radio-based positioning receiver and sensor for measuring roll angular velocity, in which the following steps are included: actuation of the actuators of the projectile by the control system, included in the projectile, for maneuvering of the projectile; estimation of a first signal, the projectile control force, on the basis of the control system included in the projectile; measurement of a second signal, the velocity of the projectile relative to the ground-fixed coordinate system, with the radio-based positioning receiver mounted in the projectile; measurement of a third signal, the rotational velocity, with the sensor for roll angular velocity mounted in the projectile; calculation of a roll angle on the basis of the first, second and third signals, estimated projectile control force, measured projectile velocity, and measured rotational velocity,

Abstract: A system and related method is disclosed for determining a range between a single antenna array and a radio-frequency reflective surface. The system includes a frequency modulated continuous wave (FMCW) signal generator which transmits the FMCW transmission signal through a pair of bias tees and a coupler prior to reaching a circulator. The circulator selectively routes the transmission signal to the single antenna array for transmission. As the transmission signal is reflected from the RF reflective surface, the single antenna array receives the reflected FMCW reception signal. The coupler receives the reception signal and delays and selectively routes the reception signal to a mixer which mixes the reception signal with a transmission signal input to create a low frequency signal. The low frequency signal passes through the pair of bias tees, is converted to digital, and received by a processor which determines the range to the reflective surface.

Abstract: A method for producing at least information for track association and fusion includes: collecting measurement values of targets for each sensing period; predicting state variables for the targets and error covariances for the state variables by using the collected measurement values and tracking the targets by using a reformed target tracking algorithm; transmitting track information including only data of the error covariance largest occupied among the error covariances to a fusion center; calculating similarity between the pre-stored fused track and the transmitted track information; sorting the track information by using the calculated similarity; and carrying out the track fusion based on the sorted track information.

Abstract: There is provided a radar apparatus configured to extract peak signals which are obtained from a difference frequency between a transmission signal and a reception signal, and to derive information of the target on the basis of the extracted peak signals. A prediction unit predicts this time peak signal based on a peak signal obtained in previous time. An extraction unit extracts this time peak signal corresponding to the predicted peak signal from peak signals existing within a predetermined frequency range. The extraction unit extends the frequency range when this time peak signal corresponding to the predicted peak signal does not exist within the predetermined frequency range.

Abstract: The invention relates to a method for determining angle of incidence for a projectile in the path of the projectile from launcher to target, which projectile is guidable and substantially or partially roll-stable and comprises a control system and at least two actuators with associated control members, in which the following steps are included: determination of applied force for pitch control by evaluation of the moment upon the actuators of the projectile, determination of applied force for yaw control by evaluation of the moment upon the actuators of the projectile, calculation of the pitch component a of the angle of incidence and of the yaw component ? of the angle of incidence, based on comparison between the evaluated moments and reference data for moments. The invention also relates to a GNC system.

Abstract: A location and guidance system including a flying craft and a reception device. The flying craft includes a plurality of antennas distributed around its fuselage and emitting rearwards with rectilinear polarization, the emitted signals being specific to each antenna, the positions and the dimensions of the antennas being configured such that the body of the flying craft avoids by masking for at least one antenna the reflections of the signal emitted by this antenna off the ground or off lateral obstacles whatever the position of the flying craft. The reception device is placed substantially on a trajectory axis of the flying craft and configured to be oriented to sight the rear thereof and includes at least two single-pulse antennas operating in orthogonal planes determines a position of the flying craft by analyzing the emitted signals received by the antennas of the reception device.

Abstract: Mechanisms for identifying obstacles in a landing zone are disclosed. A first polarization elevation angle matrix is generated based on reflected radar signals having a first polarization sense. A second polarization elevation angle matrix based on reflected radar signals having a second polarization sense that differs from the first polarization sense is generated. The first polarization elevation angle matrix and the second polarization elevation angle matrix are integrated to form an integrated elevation angle matrix that identifies first scatterers and second scatterers with respect to the landing zone.

Abstract: A radio frequency (RF) obstacle detection system of a vehicle includes an RF radar module that transmits an initial RF signal having a first signal strength and to receive at least one reflected RF signal having a second signal strength based on the initial RF signal. A radar reflector module is coupled to the vehicle and disposed at a first distance remotely located from the RF radar module. The radar reflector module receives the RF signal generated by the RF radar module and efficiently retroreflects the RF signal to generate a reflected signal having a second signal strength back to the RF radar module. A control module determines a second distance between the radar reflector module and at least one obstacle remotely located from the vehicle based on the reflected signal provided by the radar reflector module and a received signal induced by the at least one obstacle.

Abstract: A microwave sensor adjusts its sensing range based on a range gate selected from multiple range gates. An active antenna module transmits a first FMCW signal toward a target based on the selected range gate and for receiving second FMCW signal reflected from the target. A modulating module is used for generating modulation signal. The bandwidth of the first FMCW signal depends on an amplitude of the modulation signal. A first demodulator is used for demodulating the first FMCW signal and the second FMCW signal to generate beat frequency. A second demodulator is used to demodulate the beat frequency signal to generate a Doppler signal. An indentifying circuit is used for generating a triggering signal based on a voltage difference between integral of the Doppler signal from an object within the rage gate and an integral of clutter.

Abstract: A defensive interceptor missile is provided for defending a target against a radar-homing attack missile. A Missile Anti-Ship Kill Enhancement System (MASKES) comprises a defensive missile with digital RF memory device for (a) receiving radar signals from an attack missile, (b) processing received attack missile signals, and (c) transmitting amplified, Doppler shifted signals toward the attack missile such that the attack missile would interpret signals as being reflected off ship and target the source of the reflective signal, the defensive interceptor missile.

Abstract: A detection system includes a polarization analyzer that generates one or more null detection values if an object is sensed in a received millimeter wave (MMW) brightness temperature data set. The polarization analyzer analyzes a polarization parameter in the received MMW brightness temperature data set to generate the one or more null detection values. An object detector detects if the object is present based on a comparison of the one or more null detection values to a predetermined threshold. A singular value decomposition (SVD) unit is enabled by the object detector to decompose the MMW brightness temperature data set into a plurality of image layers. Each image layer includes at least one feature of a scene. An identification unit analyzes the plurality of image layers from the SVD unit to determine a shape or a location of the object from the scene.

Abstract: SAR imaging method that includes applying PRF decimation to range-compressed IQ data to generate PRF-decimated range-compressed IQ data for each image block of an image and applying motion compensation to the PRF-decimated range-compressed IQ data to generate motion-compensated data for each image block. The method includes computing first stage image values at image grid point intersections of iso-range lines and vertical grid lines for each image bock based on the motion-compensated data for each image block. The method also includes computing second stage image values for the image grid point intersections by interpolation using the first stage image values at the image grid point intersections and correcting image phase of the second stage image values for the image grid point intersections to generate phase-corrected image values for each image block. The method includes generating a full-resolution SAR image by summing the phase-corrected image values for each image block.

Abstract: A negative obstacle detection system for a vehicle comprises a stereo camera mountable to the vehicle to provide a forward facing image and a long range radar mountable to the vehicle to emit a signal in a forward direction from the vehicle. An electronic control unit receives data from the stereo camera and the long range radar to determine if a negative obstacle may be located in a forward proximity to the vehicle.

Abstract: The present invention relates to reflector arrangement for proof test of a radar level gauge and to a radar level gauge system comprising such a reflector arrangement. The reflector arrangement comprises a pliable elongated member for attachment to a fixed structure in the tank; a weight attachable to the pliable elongated member; and a reflector member for reflecting an electromagnetic signal impinging on the reflector plate. The weight is configured to be coupled to the reflector member in such a way that an orientation of the weight determines an orientation of the reflector member.

Abstract: An ultra-wideband (UWB) radar imaging system is carried by a mobile platform—such as an aircraft—the UWB radar imaging system including multiple UWB radar sensors; the UWB radar sensors transmitting a high resolution radar signal using an array of power amplifiers and corresponding polarizing antenna arrays to form spatial power combining and beam forming from each UWB radar sensor; and receiving reflections using an array of low noise amplifiers and corresponding antenna arrays to form spatial power combining from the reflections at each. UWB radar sensor; processing the radar sensor data from the UWB radar sensors by an imaging processor for detecting a ballistic projectile; and providing trajectory information of a detected ballistic projectile on a display. Trajectory modeling enables fusing the radar sensor data with optical or thermal imaging data and the trajectory information to display a probable source location of the detected ballistic projectile.

Abstract: A monitoring device includes a memory configured to store first and second background information related to positional information of a fixed object existing in a detection area of a radar device that receives a reflected wave from an object existing at an emission destination of an emitted radar wave and detects position and moving velocity information of the object as detection information of the object; and a processor configured to detect, upon receiving a first specified signal, a temporary fixed object existing in a detection area of the radar device by using the detection information and the first background information stored in the memory, and to detect, upon receiving a second specified signal, a movement object existing in the detection area of the radar device by using the detection information and the second background information stored in the memory.

Abstract: A multimode seeker includes a radio-frequency antenna and a controller. The radio-frequency antenna comprises a substrate and an electrically conductive film deposited on the substrate. The substrate is transparent to short wavelength infrared radiation. The electrically conductive film is configured to transmit and receive radio-frequency radiation and is transparent to the short wavelength infrared radiation. The controller is configured to receive and interpret data from the radio-frequency antenna.

Abstract: A height-finding 3D avian radar comprises an azimuthally scanning radar system with means of varying the elevation pointing angle of the antenna. The elevation angle can be varied by employing either an antenna with multiple beams, or an elevation scanner, or two radars pointed at different elevations. Heights of birds are determined by analyzing the received echo returns from detected bird targets illuminated with the different elevation pointing angles.