Abstract: An apparatus and method for enhanced calibration of radar at the module level supports dual polarization and array calibration and alignment without the use of external test equipment. Utilizing a delay line, loop back capability at the module level allows existing receiver exciter subsystem to be used for calibration. This approach eliminates the need for manual array calibration using external RF monitor subsystem or external test antennas.

Abstract: Described herein are various technologies relating to generating a reduced bias multi-resolution (RBMR) coherent change detection (CCD) image product. A low bias, low resolution (LBLR) CCD image product is generated based upon a first SAR image of a scene and a second SAR image of the scene, where each pixel in the LBLR CCD image has a respective value that is computed using a large box-filter. The LBLR CCD image is segmented into a plurality of segments, and a box-filter size is determined for each segment based upon values of pixels in the segment. A RBMR CCD image product is then computed using box-filters of the determined sizes.

Abstract: The present disclosure provides a system that predicts the occurrence and location of a severe weather event including a non-transitory tangible media containing software or firmware encoded thereon for operation by one or more processors that receive a plurality of weather variables, at least one of said weather variables being from radar data from a dual-polarization radar, where the processor (i) generates at least one derived radar variable based on the weather variables, (ii) identifies a geographical region of interest, (iii) validates the presence of the region of interest, (iv) determines whether there is a vertical column of regions of interest, wherein the presence of the vertical column of regions of interest is indicative of the vertical size of the severe weather event and (viii) validates the presence of the vertical columns of regions of interest.

Abstract: A system and method are provided for detecting and identifying elongated objects relative to a host vehicle. The method includes detecting objects relative to the host vehicle using a plurality of object detection devices, identifying patterns in detection data that correspond to an elongated object, wherein the detection data includes data fused from at least two of the plurality of object detection devices, determining initial object parameter estimates for the elongated object using each of the plurality of object detection devices, calculating object parameter estimates for the elongated object by fusing the initial object parameter estimates from each of the plurality of object detection devices, and determining an object type classification for the elongated object by fusing the initial object parameter estimates from each of the plurality of object detection devices.

Abstract: A radio altimeter includes a voltage controlled oscillator outputting a radio frequency signal through a forward path in a direction from the voltage controlled oscillator to a radio frequency antenna, a path extending unit positioned in the forward path to receive the radio frequency signal to delay the radio frequency signal to generate a delayed radio frequency signal. The radio frequency antenna transmits the delayed radio frequency signal to ground and receives the delayed radio frequency signal reflected from the ground. The radio altimeter also includes a mixer that receives the reflected delayed radio frequency signal through a signal reception path from the radio frequency antenna and the radio frequency signal from the voltage controlled oscillator and mixes the radio frequency signal and the reflected delayed radio frequency signal to output a beat frequency signal which is used to calculate altitude with respect to the ground.

Abstract: There is provided a radar device with which the density of transmitted signals can be made uniform in relation to orientation even if the rotation rate of an antenna fluctuates, and interference removal processing can be given a simpler configuration. A radar device that transmits and receives signals while rotating an antenna comprises a motor, a transmission pulse generator, and a transmitter. The motor rotates the antenna (antenna main body). The transmission pulse generator generates transmission timing pulses for transmission signals from the antenna based on the rotational angle of the antenna main body. The transmitter transmits transmission signals via the antenna according to the transmission timing pulses generated by the transmission pulse generator.

Abstract: Described is a system for synthetic aperture radar (SAR) imaging. The system is adapted to reconstruct a set of images to generate a set of reconstructed SAR images, wherein at least some of the reconstructed SIR images have noise and contain glint. The reconstructed SAR images are then stacked into a matrix D, in which each column of the matrix is a reconstructed SAR image. Using sparse and low-rank decomposition on the matrix D, the system then extracts a clean background from the reconstructed SAR images and separates the noise and glint. Based on that, the system is operable to detect moving targets in sparse part S and issuing a notification of such a moving target.

Abstract: The various technologies presented herein relate to identification and mitigation of spurious energies or signals (aka “spurs”) in radar imaging. Spurious energy in received radar data can be a consequence of non-ideal component and circuit behavior. Such behavior can result from I/Q imbalance, nonlinear component behavior, additive interference (e.g. cross-talk, etc.), etc. The manifestation of the spurious energy in a radar image (e.g., a range-Doppler map) can be influenced by appropriate pulse-to-pulse phase modulation. Comparing multiple images which have been processed using the same data but of different signal paths and modulations enables identification of undesired spurs, with subsequent cropping or apodization of the undesired spurs from a radar image. Spurs can be identified by comparison with a threshold energy. Removal of an undesired spur enables enhanced identification of true targets in a radar image.

Abstract: Embodiments of the present invention disclose systems and methods for providing an ATC Overlay data link. Through embodiments of the present invention, existing ATC (or other) modulated signals using existing standard frequencies may be utilized to transmit (e.g., from an aircraft transponder) additional information in a manner that does not render the transmitted signal unrecognizable by legacy ATC equipment. Legacy equipment will be able to demodulate and decode information that was encoded in the transmitted signal in accordance with preexisting standard modulation formats, and updated equipment can also extract the additional information that was overlaid on transmitted signals.

Abstract: A method of radar signal processing includes providing an analog front end (AFE) including an amplifier coupled between an antenna and an ADC in a receive path, where an ADC output is coupled to an input of an elastic ADC buffer (elastic buffer) including a divided memory with for writing samples from the ADC (samples) while reading earlier written samples to a first signal processor by a high speed interface. A transmit path includes at least one power amplifier provided by the AFE coupled to drive an antenna. A Greatest Common Divisor (GCD) is determined across all chirps in a radar frame programmed to be used. For each frame a sample size for the elastic buffer is dynamically controlled constant to be equal to the GCD for reading samples from one memory block and writing samples to another memory block throughout all chirps in the frame.

Abstract: A radar fill level measurement device for determining a fill level of a medium is provided, including a radar module to generate a transmission signal of at least 60 GHz; and an antenna coupled to the module and to transmit the signal to a surface of the medium and to receive a reflected signal, the module including a phase-locked loop including a push-push oscillator and a phase detector, the oscillator including a first and second outputs, a duplexer coupled between the push-push oscillator and the antenna, and a frequency multiplier coupled between the oscillator second output and the duplexer, the oscillator first output being directly wired to the phase detector input, the duplexer being coupled to the antenna, the phase detector including a reference input and a phase detector output coupled to an oscillator control input. A method for operating a radar fill level measurement device is also provided.

Abstract: An object detection device includes a sub-cluster generating circuitry which, in operation, divides a cluster generated by a cluster generator into one or more first sub-clusters each corresponding to a part of an object having a different traveling direction or traveling speed from a main part of the object and a second sub-cluster corresponding to the main part of the object; and a speed calculating circuitry which, in operation, uses one or more capture points belonging to the second sub-cluster and calculates a traveling speed of the object.

Abstract: A method of improving height measurement resolution for a radar system is provided. The method includes periodically generating, at a FFT processor, a set of FFT bins across a frequency range based on a periodic ramping of a FMCW radar signal from a first frequency to a second frequency; selecting a subset of bins from at least one set of FFT bins by implementing a leading-edge-tracking algorithm by at least one processor; implementing a second algorithm on the selected subset of bins to determine a power ratio between the leading edge tracked bin and the remaining bins in the selected subset of bins to determine an interpolated bin number within the selected subset of bins; and determining an approximate distance to the target based on the interpolated bin number within the selected subset of bins. The sets of FFT bins are indicative of a respective plurality of distances.

Abstract: A method and apparatus for detection of blocking of a frequency-modulated continuous-wave, FMCW, radar device. A first signal being a first transmission signal including an object detection signal is transmitted. A second signal being a frequency offset signal relative the first signal is transmitted. A reception signal including at least a received version of the second signal is received. Blocking of the FMCW radar device is determined by identifying a blocking pattern in the received version of the second reception signal.

Abstract: A wireless network based method for detecting carrying of metal, comprising: installing a wireless signal transmitting device and a wireless signal receiving device indoors; continuously transmitting to the surrounding, by the wireless signal transmitting device, wireless electromagnetic wave signals; continuously receiving, by the wireless signal receiving device, the wireless electromagnetic wave signals; continuously performing, through a signal abnormity detection system, abnormity analysis to the received wireless electromagnetic wave signals, and if any abnormality is determined, performing further analysis in the next step S5 to wireless electromagnetic wave signals within an abnormal waveband; and S5: extracting, through a date feature analysis system, a feature value of the wireless electromagnetic wave signals within the abnormal waveband, comparing and matching the feature value with features stored in an abnormal feature library, and if the feature of the wireless electromagnetic wave signals matc

Abstract: A method to calculate position of a platform using a detection and ranging system coupled to the platform to transmit a signal to space object having a known ephemeris. The detection and ranging system receives the reflected signal from the space object. Taking the range of the platform from the space object using a time delay between transmission of the signal and receipt of the reflected signal and the range-rate using a Doppler frequency shift between the transmission of the signal and the receipt of the reflected signal makes it possible to calculate a position fix of the platform using the determined range, the determined range-rate, an altitude of the platform, and the known ephemeris of the space object.

Abstract: A device and methods are provided for determining data points with an integrated radar sensor. In one embodiment, a method includes determining position of a device, scanning one or more objects, wherein scanning includes detecting data points by an integrated radar sensor of the device and capturing image data of the one or more objects, and determining data points for one or more objects based on the scanning. The method may also include correlating data points to one or more portions of the image data, assigning correlated data points to one or more portions of the image data, and storing, by the device, image data with data points. The device and methods may advantageously be employed for one or more of mapping, modeling, navigation and object tracking.

Abstract: A radar apparatus includes a correlator which, in operation, calculates a correlation value between the digital transmission pulse signals and the digital reception pulse signals, an error estimator which, in operation, estimates, on the basis of the correlation value, an I component error and a Q component error included in the digital reception pulse signals, a correction parameter calculator which, in operation, calculates a correction parameter for correcting the I component error and the Q component error, and an error corrector which, in operation, corrects, on the basis of the correction parameter, the I component error and the Q component error included in at least one of the digital transmission pulse signals and the digital reception pulse signals.

Abstract: A radar system includes a plurality of radar devices each having a transmitting unit that transmits a high frequency signal to an object, a receiving unit that receives a signal reflected from the object, an individual control unit that controls transmission and reception timings, and a converting unit that converts an output of the receiving unit into digital data, and a central processing device having an integration process unit that processes information transmitted from the radar devices in association with positional information of the radar devices, a command control unit that controls operation timings of the individual control units, and a detection process unit that performs a process for detecting the object on the digital data before being processed by the integration process unit. Digital communication isolated from the transmission and reception timing controls at the individual control unit is performed between the radar devices and the central processing device.

Abstract: A method for processing a sequence of images is provided. The method receives a sequence of images. Each image includes a plurality of pixels. The pixels include radial velocity information. The method compresses the sequence of images based on the radial velocity information. The method stores the compressed sequence of images in a storage device.