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公开(公告)号：US11025358B1
公开(公告)日：2021-06-01
申请号：US16852631
申请日：2020-04-20
Inventor： Jonathan P. Beaudeau
Abstract: A method of mitigating interference in a wireless signal of interest (SOI) received on an active frequency channel due to a common template multi-channel jamming attack includes selecting at least one reference channel from among a plurality of monitored frequency channels in which correlated jamming patterns are present without the SOI. The method further includes generating a plurality of weights according to data obtained from the active and reference channels, and applying an adaptive digital filter to the active channel according to the generated weights. The monitored frequency channels can be centered about the active frequency channel. The selection of reference channels can be varied and optimized. The data from each reference channel can be used to create a single virtual antenna tap or a plurality thereof. Assignment of the active channel can be time-varied to match a hopping pattern of a frequency hopping SOI.
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公开(公告)号：US11025201B2
公开(公告)日：2021-06-01
申请号：US16082577
申请日：2018-02-28
Inventor： Kathiravan Krishnamurthi
Abstract: Embodiments of power efficient radio mixers are provided. A generalized impedance matched low-voltage active mixer circuit technique, which utilizes a plurality of commutator cells and transformers, is disclosed. The low voltage active mixer function is coupled to an impedance matched amplifier allowing for insertion of image rejection filtering between the amplifier and the mixing function. The commutator cells can be driven in parallel by common local oscillator (LO) and intermediate frequency (IF) ports combined in parallel to yield highly linear mixers. A multi-channel receiver with a common impedance matched radio frequency (RF) amplifier driving a plurality of commutator cells with multiple LOs and IFs is also disclosed.
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公开(公告)号：US11009316B2
公开(公告)日：2021-05-18
申请号：US16178706
申请日：2018-11-02
Inventor： Quang M. Lam , Michael J. Choiniere , David A. Richards
Abstract: A method and system for nonlinear trajectory shaping guidance law capable of providing a robust guidance solution suitable for multi-mission, multi-mode operations. The nonlinear trajectory shaping guidance law offers (1) a dual layered GL gains calculation: (i) NTS time varying adjustment accounting for engine on/off and L/D variation and (ii) general explicit guidance algorithm based sub-optimal fixed-gain selection while still maintaining its trajectory shaping capability for short range to go missions; (2) flight path angle (FPA) command tracking and following to ensure a high probability of target destruction while minimizing collateral damages; (3) high precision impact point calculation factoring in target location errors or motion and maneuvering uncertainties; and (4) heading error angle minimization.
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公开(公告)号：US20210135356A1
公开(公告)日：2021-05-06
申请号：US16673228
申请日：2019-11-04
Inventor： Mark D. Hickle
Abstract: Techniques are provided for decorrelation of intermodulation products in mixer circuits. A circuit implementing the techniques according to an embodiment includes four switches. Each of the switches comprise a complementary pair of n-channel and p-channel metal oxide semiconductor (NMOS/PMOS) field effect transistors (FETs). The NMOS/PMOS FETs include a source port, a drain port, and a gate port. The gate port is configured to receive an oscillator signal. The circuit also includes electrical conductors to couple the four switches into a double-balanced passive ring configuration to generate an output signal as a mix of an input signal and the oscillator signal. The output signal includes a third order intermodulation (IM3) product. The circuit further includes a voltage bias generator to generate a bias voltage to bias the input signal and the output signal. The magnitude and phase of the IM3 product are determined, at least in part, by the bias voltage.
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公开(公告)号：US10992895B2
公开(公告)日：2021-04-27
申请号：US15985237
申请日：2018-05-21
Inventor： Allen W Hairston , Daniel P Lacroix
IPC: G01J5/00 , H04N5/378 , H04N5/369 , H01L27/146 , H04N5/33
Abstract: Methods and systems for enabling an approximation of true snapshot integration by lowering total power requirements, total detector bias current, integrated charge per detector and detector impedance while allowing for higher ROIC input noise through the use of microbolometer photodetectors, super-pixels, and techniques for their use are herein provided.
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Patent Agency Ranking
公开(公告)号：US10990471B2
公开(公告)日：2021-04-27
申请号：US16425377
申请日：2019-05-29
Inventor： Jason F. Ross
IPC: G06F11/00 , G06F11/10 , G11C11/56 , G06F1/3287 , G11C11/16 , G06F1/3206
Abstract: A disclosed apparatus and method reduce the likelihood of multiple bit single event upset (SEU) errors in space-deployed memory devices and memory macros. For each memory, a bit selection layer effectively increases the mux of the memory bit table, thereby reducing the word size while increasing the word capacity, without changing the total memory capacity. As a result, the separation between the physical bit storage locations for each word is increased, thereby reducing the likelihood of multiple bit SEU errors. A buffer can be implemented if the memory lacks individual bit write control. The memory can be implemented in a core integrated circuit (IC) of an multi-chip module (MCM) hybrid integrated circuit (HIC), and the bit selection layer and/or buffer can be implemented in a chiplet or chiplets of the MCM-HIC.
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公开(公告)号：US20210116699A1
公开(公告)日：2021-04-22
申请号：US16658465
申请日：2019-10-21
Inventor： George F. Dippel
IPC: G02B26/02
Abstract: A system for a synchronous high speed shutter for sensor protection comprising a shutter disk having a rotational axis; wherein the rotational axis of the shutter disk is perpendicular to an optical axis of the sensor. A plurality of paired reflecting elements on the shutter disk, perpendicular to a surface of the shutter disk, wherein a polished surface of each of the plurality of paired reflecting elements is figured to match an angle (f #) of an incoming ray bundle; whereby incoming radiation is directed back out collecting optics; wherein the sensor comprises a single photon Geiger mode detector, and whereby the sensor is protected from damage by over-current due to a flood of photons.
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公开(公告)号：US20210102790A1
公开(公告)日：2021-04-08
申请号：US16595609
申请日：2019-10-08
Inventor： David J. Schorr , Matthew F. Chrobak , Thomas T. Scarberry , Richie Spitsberg , Paul E. Turner
Abstract: A rocket in one example includes separate chambers for storing two thrust grains: an initial thrust grain and a boost thrust grain. The initial thrust grain is stored in a first chamber and the boost thrust grain is stored in a second chamber. The initial thrust grain is ignited separately from the boost thrust grain, such as in a two-stage process where the initial thrust grain is ignited before, or at the same time as, the boost thrust grain. The initial thrust grain has a large surface area (different burn pattern) relative to the boost thrust grain, which causes the initial thrust grain to have a shorter burn time than the boost thrust grain.
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公开(公告)号：US20210099838A1
公开(公告)日：2021-04-01
申请号：US16588237
申请日：2019-09-30
Inventor： Eric N. Duchon , I-Ju L. Nelson , Sarah E. Li , Helen M. Vo , Daniel I. Zwillinger
Abstract: Techniques are provided for implementing a custodianship model for decentralized track fusion. A methodology implementing the techniques according to an embodiment includes negotiating, between a first decentralized track fuser (DTF) and one or more peer DTFs. The method also includes accepting, by the first DTF, custodianship of a track of an object from one of the peer DTFs based on a first negotiation. The method further includes updating, by the first DTF, the track based on fusion of data items associated with the track. The data items are received from one or more of the peer DTFs. The method further includes transferring, by the first DTF, custodianship of the updated track to one of the peer DTFs based on a second negotiation. In some cases, the transfer may be initiated by detection of a failure state of the first DTF.
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公开(公告)号：US10962341B2
公开(公告)日：2021-03-30
申请号：US16605450
申请日：2019-01-23
Inventor： Francis M. Feda , John R. Franzini , Gregory S. Notaro
Abstract: Techniques and architecture are disclosed for a system that includes a fuze at a leading end of a projectile body and a fuze setter configured to engage the fuze and to program the same prior to launch. The system, in one example, includes a plurality of electrical contact pads on an exterior surface of a fuze radome housing and a plurality of electrical contact pins on the fuze setter. The electrical contact pads are arranged in a rotationally symmetric pattern that enables an electrical interface to be formed with the electrical contact pins, regardless of the rotational orientation of the fuze. Commutation is performed to rotate signals to the electrical contact pins instead of requiring that the fuze be physically rotated to bring the electrical contact pads into alignment with the electrical contact pins.
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