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    Retractable control fins for underwater vehicles
    52.
    发明授权
    Retractable control fins for underwater vehicles 有权

    公开(公告)号：US11597485B2

    公开(公告)日：2023-03-07

    申请号：US17108552

    申请日：2020-12-01

    Applicant: BAE Systems Information and Electronic Systems Integration Inc.

    Inventor： Christopher G. Van Valkenburgh ,  Richard N. Jorgenson ,  Gary M. Shapiro ,  Jerrod S. Allen

    IPC: B63G8/00 ,  B63G8/04

    Abstract: Techniques are disclosed for providing retractable control fins on an underwater vehicle. The retractable control fins can be extended away from a main hull portion of the underwater vehicle and retracted inwards to a stowage region within the hull portion to protect the fins from damage and reduce an overall outer diameter (e.g., in the case of a cylindrical body) of the underwater vehicle. In some embodiments, the control fins are folded inwards to reduce the vehicle diameter. In other embodiments, the control fins are pulled inwards using a rotating structure designed to slide the control fins through an opening and into an inner portion of the hull to reduce the vehicle diameter. The retraction of the fins through the various retraction mechanisms reduces the envelope diameter of the underwater vehicle.

    Artificial intelligence radio classifier and identifier
    53.
    发明授权
    Artificial intelligence radio classifier and identifier 有权

    公开(公告)号：US11558810B2

    公开(公告)日：2023-01-17

    申请号：US17142800

    申请日：2021-01-06

    Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

    Inventor： Joshua W. Robinson ,  Joseph M. Carmack ,  Scott A Kuzdeba ,  James M. Stankowicz, Jr.

    IPC: H04W48/16 ,  G06N20/00

    Abstract: A system whereby individual RF emitter devices are distinguished in real-world environments through deep-learning comprising an RF receiver for receiving RF signals from a plurality of individual devices; a preprocessor configured to produce complex-valued In-phase (I) and Quadrature (Q) IQ signal sample representations; a two-stage Augmented Dilated Causal Convolution (ADCC) network comprising a stack of dilated causal convolution layers and traditional convolutional layers configured to process I and Q components of the complex IQ samples; transfer learning comprising a classifier and a cluster embedding dense layer; unsupervised clustering whereby the RF signals are grouped according to a device that transmitted the RF signal; and an output identifying the individual RF emitter device whereby the individual RF emitter device is distinguished in the real-world environment.

    Direct Digital Synthesizer With Frequency Correction
    55.
    发明申请
    Direct Digital Synthesizer With Frequency Correction 有权

    公开(公告)号：US20220407524A1

    公开(公告)日：2022-12-22

    申请号：US17351529

    申请日：2021-06-18

    Applicant: BAE Systems Information and Electronic Systems Integration Inc.

    Inventor： Shailendra Srinivas ,  Joseph D. Cali ,  Steven E. Turner

    IPC: H03L7/093

    Abstract: A direct digital synthesizer (DDS) circuit. The circuit includes a first input to receive a first fixed frequency clock signal having a first frequency, a second input to receive a second fixed frequency clock signal having a second frequency lower than the first frequency, and an output to provide an output frequency that is based at least in part on a frequency control word (FCW). The DDS circuit may include a frequency correction circuit having a first input to receive the first clock signal, a second input to receive the second clock signal, and a third input to receive the FCW, and an output to provide a frequency error of the first clock signal, the frequency error determined using the second clock signal and FCW. Alternatively, or in addition to, the DDS circuit may include an all-digital phase lock loop to correct for frequency wander of the first clock signal.

    System and method for terminal acquisition with a neural network
    57.
    发明授权
    System and method for terminal acquisition with a neural network 有权

    公开(公告)号：US11521063B1

    公开(公告)日：2022-12-06

    申请号：US16717361

    申请日：2019-12-17

    Applicant: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.

    Inventor： Michael J Powers ,  Peter Simonson

    IPC: G06N3/08 ,  G06K9/62 ,  G01D5/30 ,  G01D7/00 ,  G06F17/16

    Abstract: A system and method for reducing laser communication terminal pointing uncertainty. The method trains an artificial neural network (ANN) with input data characterizing terminal pointing error and dependent parameters. The method inputs the trained ANN a set of data of these dependent parameters with unknown pointing error. The method uses the ANN output to apply corrections to the terminal pointing solution to reduce pointing uncertainty. The method can condition the ANN generated corrections to avoid cases where application of the ANN correction could exceed the original pointing uncertainty. This conditioning includes computing the Euclidean distance between current ANN input parameter values and values in the ANN training dataset, and bounding the allowed magnitude of the ANN pointing correction. The method can train the ANN incrementally during terminal operation for real-time updates or train the ANN offline with gathered data and implement the trained ANN on the terminal for subsequent links.

    BROADBAND MICROWAVE AND MILLIMETER-WAVE BALANCED-TO-UNBALANCED TRANSFORMER
    58.
    发明申请
    BROADBAND MICROWAVE AND MILLIMETER-WAVE BALANCED-TO-UNBALANCED TRANSFORMER 有权

    公开(公告)号：US20220385261A1

    公开(公告)日：2022-12-01

    申请号：US17333163

    申请日：2021-05-28

    Applicant: BAE Systems Information and Electronic Systems Integration Inc.

    Inventor： Mark D. Hickle

    IPC: H03H7/42 ,  H01P5/16

    Abstract: Techniques are provided for a broadband microwave/millimeter-wave balanced-to-unbalanced transformer (balun). A balun implementing the techniques according to an embodiment includes a first impedance matching network configured to reduce insertion and return losses of a single-ended signal at a first port of the balun. The balun also includes a first planar bifilar coupled transmission line coupled to the first impedance matching network and configured to transform the single-ended signal into a differential signal. The balun further includes a second planar bifilar coupled transmission line coupled to the first bifilar coupled transmission line and configured to compensate for amplitude and phase imbalance induced on the differential signal by the first bifilar coupled transmission line. The balun further includes a second impedance matching network coupled to both planar bifilar coupled transmission lines and configured to reduce insertion and return losses of the differential signal at second and third ports of the balun.

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