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公开(公告)号：US11199379B1
公开(公告)日：2021-12-14
申请号：US16588941
申请日：2019-09-30
Inventor： Quang M. Lam , Michael J. Choiniere , George M. Horihan , David A. Richards , Jason T. Stockwell
IPC: F41G7/22
Abstract: The system and method for EO/IR and RF sensor fusion and tracking using a dual extended Kalman filter (EKF) system provides a dynamic mixing scheme leveraging the strength of each individual sensor to adaptively combine both sensors' measurements and dynamically mix them based on the actual relative geometries between the sensors and objects of interest. In some cases the objects are adversarial targets and other times they are assets.
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92.发明申请公开(公告)号：US20210376832A1
公开(公告)日：2021-12-02
申请号：US16888035
申请日：2020-05-29
Inventor： Jason H. Branch , Karl P. Herb , Danny L. Plemons
IPC: H03K19/173 , H03F3/04 , F41H11/02 , B64D7/00
Abstract: A sequencer for use with a countermeasure defense system includes an input signal indicative of firing an expendable, a circuit card that receives the input signal indicative of firing the expendable and an output analog signal from the circuit card that fires the expendable. The parameters of the output analog signal correspond to parameters of a digital waveform.
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公开(公告)号：US11184042B1
公开(公告)日：2021-11-23
申请号：US16992491
申请日：2020-08-13
Inventor： Allan M. Kabel
IPC: H04B1/10
Abstract: Techniques are disclosed for partial band signal reconstruction. A partial band signal reconstruction circuit includes a zero generator, an analysis filter, and a synthesis filter. The zero generator is configured to generate a zero-value channel (i.e., a signal of all zeros). The analysis filter is configured to convert a wideband time-domain signal into K narrow-band channels, and to select at least R of the K frequency-domain subchannels for synthesis. The synthesis filter is configured to receive the at least R subchannels from the analysis filter and the zero or more zero-value channels from the zero generator and convert the at least R subchannels and the zero-value channels (a total of P channels) into a time-domain signal. The values of K and P are related by a constraint that constrains one or more parameters of the analysis filter and the synthesis filter.
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公开(公告)号：US11178314B2
公开(公告)日：2021-11-16
申请号：US16210792
申请日：2018-12-05
Inventor： Derek T Robison , Brendan P. Cirillo
IPC: G02B19/00 , G02B27/01 , G06T5/00 , G06T5/50 , G06T7/62 , H04N5/217 , H04N5/33 , F41G1/01 , F41G1/02 , F41G1/36
Abstract: A system for suppressing sight blooming in an infrared sight includes determining an n×n grid size; creating a grid of n×n averages; calculating a mean; determining if a heat source is detected; detecting a heat source radius; calculating the average of the outside boxes; estimating the average of the inside boxes; setting the source to zero; smoothing the boxes; subtracting the mean of the outside from the mean of the inside; feeding back the result into history; up-sampling the offset; subtracting the offsets; and displaying the image.
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公开(公告)号：US11177848B1
公开(公告)日：2021-11-16
申请号：US17018299
申请日：2020-09-11
Inventor： Michael A. Zalucki , Tyler M. Hayslett
Abstract: Techniques are provided for signal detection based on the Gibbs phenomenon. A methodology implementing the techniques according to an embodiment includes transforming an input signal to the frequency domain and performing median filtering of amplitudes associated with frequency bins of the frequency domain transformed input signal. The median filtering is performed to attenuate longer duration or continuous signal components that may be present in the input signal. The method also includes identifying a sinc function main lobe in the median filtered signal, the sinc function associated with the Gibbs phenomenon. The method further includes detecting a discontinuity in the input signal based on the identified sinc function main lobe. The discontinuity is associated with a shorter duration signal component that is present in the input signal. Shorter duration signal components may include relatively narrow signal pulses and relatively fast rising or falling signal edges.
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Patent Agency Ranking
公开(公告)号：US11175370B1
公开(公告)日：2021-11-16
申请号：US16884516
申请日：2020-05-27
Inventor： Richard Schiffmiller , Eleanna Georgiadis
IPC: G01S3/42
Abstract: Techniques are provided for emitter geolocation. A methodology implementing the techniques according to an embodiment includes measuring phase differences between radar signals received at one or more pairs of antennas. The method also includes calculating hypothesized phase differences based on ray tracings from hypothesized emitter locations at a first set of grid points, to the antennas. The method further includes generating scores based on correlations between the measured phase differences and the hypothesized phase differences. The method further includes generating an error ellipse based on candidate grid points associated with scores that are above a threshold. The process may be repeated on a second set of grid points, bounded by the error ellipse, to generate a second set of scores. The grid point, from the second set of grid points, that is associated with the highest of the second set of scores is selected as the estimated emitter geolocation.
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公开(公告)号：US11139573B2
公开(公告)日：2021-10-05
申请号：US16758308
申请日：2017-10-30
Inventor： Gary A. Schay , John Cosenza , Michael S. Murphy
Abstract: An assembly comprising a horizontal GPS patch antenna element and a vertical IFF antenna element providing simultaneous high performance IFF communication and GPS reception with minimal IFF to GPS interference. The IFF element can be a monopole element. A second monopole co-linear with the IFF element can provide simultaneous UHF communication. In embodiments, the assembly is a blade that can replace an existing IFF blade on an aircraft or other asset. Separate IFF and GPS connectors can be provided, or a single connecter can be shared using an integral diplexer. Embodiments include a GPS preamplifier integral with the blade. In other embodiments, the IFF element is an annular slot transponder that is centered on the GPS patch element. System embodiments include bandpass filters and/or GPS blanking to further protect the GPS receiver from IFF transmissions.
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公开(公告)号：US20210305481A1
公开(公告)日：2021-09-30
申请号：US17265385
申请日：2018-10-04
Inventor： Maxwell L. Affleck , Shawn P. Sharp , Mike Pena , Allison Moulton
Abstract: The system and method for phase noise reduction and/or vibration reduction in assemblies using piezoelectric passive resonant shunt damping or active vibration cancellation/compensation techniques. In some cases a circuit card or similar structure comprises an embedded piezoelectric device to reduce the effects of vibration on any sensitive device or component thereon. The system has a resonant shunt circuit or other control circuit to provide electrical loading to the piezoelectric device and may be single frequency mode or multimodal. The system may also be adaptively controlled by a microprocessor or the like, so that the vibration sensitive devices are monitored and controlled over time to extend the life of the device.
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公开(公告)号：US20210303686A1
公开(公告)日：2021-09-30
申请号：US16834461
申请日：2020-03-30
Inventor： Jonathan Shuai , Ty M. Danet , Kalyanaraman Vaidyanathan
Abstract: A system and method is provided that tests and determines whether candidate artificial intelligence model contains a Trojan from when it was trained and using the outcome determination of the Trojan to determine whether the candidate artificial intelligence model should be deployed. The system utilizes a first artificial intelligence that operates as a data generator and a second artificial intelligence that operates as a discriminator to determine whether the candidate artificial intelligence contains a Trojan. The first artificial intelligence combines sets of data with random Trojan triggers and the second artificial intelligence discriminates output classifications from the candidate artificial intelligence model to determine whether the Trojan is present based on probability outputs.
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公开(公告)号：US20210293526A1
公开(公告)日：2021-09-23
申请号：US16823918
申请日：2020-03-19
Inventor： Jacob D. Garan
Abstract: A shearography system uses a Geometric phase or Pancharatnam-Berry (PB) phase element to shear an image. A PB phase element provides a non-dynamical phase change used for wavefront control and results in uniform half-wave of retardation. Geometric phase may also be utilized to capture snapshot phase-resolved wavefront measurements and shearograms via a focal plane array with micro-patterned linear polarizers of different orientations. Wavefront shape control arises when the local orientation of the retarding media is spatially varied. One or more PB phase elements can be flipped or rotated to perform multiple tasks depending on its orientation. Two PB elements can be used in succession in order to provide a variable purely spatial shift between interfering wavefronts. The spatial offset of the light exiting the second element can be adjusted simply by changing the spacing between the two geometric phase surfaces. In shearography, this corresponds to an adjustable shear length.
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