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    Methods and systems for pulse association of agile emitters
    52.
    发明授权
    Methods and systems for pulse association of agile emitters 有权

    公开(公告)号：US10690745B2

    公开(公告)日：2020-06-23

    申请号：US15955987

    申请日：2018-04-18

    Applicant: Raytheon Company

    Inventor： Ian S. Robinson ,  Stanley I. Tsunoda ,  Bradley A. Flanders

    IPC: G01S3/48 ,  G01S13/88 ,  G01S7/02 ,  G01S13/933

    Abstract: An advance warning system including an antenna pair and an RWR system to receive first, second and third signals for computing a frequency for all the signals and a phase difference between the signals. If the frequencies are within a threshold frequency difference and the phase difference is less than a threshold phase difference, two signals can be associated. If the frequencies are not within the threshold frequency difference, the RWR system generates a set of ambiguous angle of arrival AoA for the signals and correlates the two sets of ambiguous AoA to determine if there is a common AoA. If there is a common AoA, a third set of ambiguous angle of arrival AoA for a third signal is generated to determine if the three sets correlate. If there is a common AoA for all three signals, the three signals are associated.

    Position and motion informed navigation system
    55.
    发明授权
    Position and motion informed navigation system 有权

    公开(公告)号：US10353077B2

    公开(公告)日：2019-07-16

    申请号：US14453537

    申请日：2014-08-06

    Applicant: Raytheon Company

    Inventor： Ian S. Robinson ,  Andrew M. Hautzik ,  Brandon Crow

    IPC: G01S19/42 ,  G01S19/46 ,  G01S19/21 ,  G01S19/50

    Abstract: A global positioning system (GPS) receiver and system for determining a geographical location associated with the GPS receiver using less than four GPS signals. The system can comprise a constraint module configured to receive one or more constraints that describe at least one characteristic of a GPS receiver when a number of GPS satellites within a line of sight to the GPS receiver is below a defined value. The system can further comprise a pseudo range calculation module configured to calculate a plurality of pseudo ranges between the GPS receiver and the number GPS satellites, wherein the plurality of pseudo ranges are to various orbital positions of the GPS satellites over a period of time; and a geographical location module configured to determine the geographical location of the GPS receiver using the plurality of pseudo ranges and known constraints of motion associated with the GPS receiver.

    ANALOG TO DIGITAL CONVERSION USING DIFFERENTIAL DITHER
    56.
    发明申请
    ANALOG TO DIGITAL CONVERSION USING DIFFERENTIAL DITHER 审中-公开

    公开(公告)号：US20190158110A1

    公开(公告)日：2019-05-23

    申请号：US15819684

    申请日：2017-11-21

    Applicant: Raytheon Company

    Inventor： Ian S. Robinson ,  James Toplicar ,  John G. Heston

    IPC: H03M3/00

    Abstract: An analog-to-digital conversion system includes two quantizers having a least significant bit arranged in a parallel pair. An input circuit coupled to the quantizers provides an analog input signal to the quantizers. A dither generator coupled to the quantizers provides an analog differential dither signal for perturbing quantization of the analog input signal. A combiner coupled to the quantizers adds respective outputs of the quantizers to obtain a linearized digital representation of the analog input signal.

    Analog to digital conversion using differential dither
    57.
    发明授权
    Analog to digital conversion using differential dither 有权

    公开(公告)号：US10298256B1

    公开(公告)日：2019-05-21

    申请号：US15819684

    申请日：2017-11-21

    Applicant: Raytheon Company

    Inventor： Ian S. Robinson ,  James Toplicar ,  John G. Heston

    IPC: H03M1/06 ,  H03M3/00

    Abstract: An analog-to-digital conversion system includes two quantizers having a least significant bit arranged in a parallel pair. An input circuit coupled to the quantizers provides an analog input signal to the quantizers. A dither generator coupled to the quantizers provides an analog differential dither signal for perturbing quantization of the analog input signal. A combiner coupled to the quantizers adds respective outputs of the quantizers to obtain a linearized digital representation of the analog input signal.

    Orbital determination (OD) of geosynchronous satellites
    58.
    发明授权
    Orbital determination (OD) of geosynchronous satellites 有权

    公开(公告)号：US10215850B2

    公开(公告)日：2019-02-26

    申请号：US14453474

    申请日：2014-08-06

    Applicant: Raytheon Company

    Inventor： Ian S. Robinson

    IPC: G01S11/02 ,  G01S11/10 ,  G01S13/00 ,  G01S13/60

    Abstract: Technology for determining an orbit of a geosynchronous satellite is described. A ground station can receive a transponded (RF) signal from a relay satellite. The relay satellite can receive an RF signal from the geosynchronous satellite and transpond the RF signal to create the transponded RF signal. The ground station can identify a second Doppler shift associated with the transponded RF signal received at the ground station from the relay satellite. The RF signal received at the relay satellite from the geosynchronous satellite can be associated with a first Doppler shift. The ground station can determine a frequency of the transponded RF signal received at the ground station from the relay satellite. The first Doppler shift associated with the RF signal transmitted from the geosynchronous satellite to the relay satellite can be calculated using the frequency of the transponded RF signal and the second Doppler shift associated with the transponded signal. The orbit of the geosynchronous satellite can be determined based on the first Doppler shift associated with the RF signal.

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