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    OPTICAL SYSTEM TO REDUCE LOCAL INTERNAL BACKSCATTER
    32.
    发明申请
    OPTICAL SYSTEM TO REDUCE LOCAL INTERNAL BACKSCATTER 有权

    公开(公告)号：US20210325668A1

    公开(公告)日：2021-10-21

    申请号：US16853029

    申请日：2020-04-20

    Applicant: Raytheon Company

    Inventor： Timothy P. Johnson ,  Matthew J. Klotz ,  Ian S. Robinson ,  Lacy G. Cook

    IPC: G02B27/00 ,  G02B5/00 ,  G01S7/481

    Abstract: A LADAR system includes a transmitter configured to emit a directed optical signal. The LADAR system includes a shared optical aperture through which the directed optical signal is emitted. The shared optical aperture includes a first pupil plane. The shared optical aperture receives a return optical signal that is based on the directed optical signal. The system includes a mirror with a hole through which the directed optical signal passes. The mirror also reflects the return optical signal towards an imager. The imager receives the return optical signal and generates an image. The image is based on a portion of the return optical signal. The system also includes a partial aperture obscuration at a second pupil plane. The partial aperture obscuration may block a portion of internal backscatter in the return optical signal. The system also includes a focal plane to record the image.

    METHODS AND SYSTEMS FOR PULSE ASSOCIATION OF AGILE EMITTERS
    33.
    发明申请
    METHODS AND SYSTEMS FOR PULSE ASSOCIATION OF AGILE EMITTERS 审中-公开

    公开(公告)号：US20190324107A1

    公开(公告)日：2019-10-24

    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 ,  G01S7/02 ,  G01S13/88 ,  G01S13/93

    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.

    DIGITAL ANALOG DITHER ADJUSTMENT
    34.
    发明申请
    DIGITAL ANALOG DITHER ADJUSTMENT 审中-公开

    公开(公告)号：US20190103877A1

    公开(公告)日：2019-04-04

    申请号：US15722265

    申请日：2017-10-02

    Applicant: Raytheon Company

    Inventor： Ian S. Robinson ,  Daniel Thompson ,  James Toplicar

    IPC: H03M1/20 ,  H03M1/60 ,  H03M1/66 ,  G02B6/35

    CPC classification number: H03M1/201 ,  G02B6/3588 ,  H03M1/0641 ,  H03M1/12 ,  H03M1/60 ,  H03M1/66

    Abstract: A method and system for data conversion includes an analog noise generator to generate a random, non-deterministic, analog noise signal. An adder adds the analog noise signal to an analog RF signal to produce a dithered analog signal. A first quantizer converts the analog noise signal to digital to produce a digital noise signal. A second quantizer converts the dithered analog signal to a digital equivalent signal. A digital dither adjustment module removes amplitude measurements of the digital noise signal from the digital equivalent signal to obtain a linearized digital representation of the analog RF signal.

    MULTIFUNCTION CHANNELIZER/DDC ARCHITECTURE FOR A DIGITAL RECEIVER/EXCITER
    35.
    发明申请
    MULTIFUNCTION CHANNELIZER/DDC ARCHITECTURE FOR A DIGITAL RECEIVER/EXCITER 审中-公开

    公开(公告)号：US20190036675A1

    公开(公告)日：2019-01-31

    申请号：US16123150

    申请日：2018-09-06

    Applicant: Raytheon Company

    Inventor： Daniel Thompson ,  Harry B. Marr ,  Ian S. Robinson

    IPC: H04L5/06 ,  H01Q19/17 ,  H01Q25/00 ,  G01S3/808 ,  G01S3/46 ,  G01S3/04 ,  G01S3/48

    Abstract: A digital receiver includes a digital synthesizer that generates a local oscillating (LO) signal at a selected frequency, and a signal mixer that receives an input signal and generates a mixed output signal in response to shifting a phase of the input signal based on the frequency of the LO signal. A multi-mode dynamic channelizer is selectively operable in a first mode and a second mode. The first mode generates a plurality of individual channels having a channel size defined by a bandwidth and a gain, and the second mode generates a parallelization of a selected channel. In response to operating in the second mode, the multi-mode dynamic channelizer adjusts at least one of the bandwidth and the gain of the selected channel based on the mixed output signal to change the channel size of the selected channel.

    Space time interleaved matched-filters
    38.
    发明授权
    Space time interleaved matched-filters 有权

    公开(公告)号：US09903933B2

    公开(公告)日：2018-02-27

    申请号：US14843346

    申请日：2015-09-02

    Applicant: RAYTHEON COMPANY

    Inventor： Ian S. Robinson ,  Bradley A. Flanders

    IPC: G01S3/16 ,  G01S3/28 ,  G01S3/32

    CPC classification number: G01S3/32

    Abstract: A system for determining a direction for an electromagnetic signal. The system includes a receiving array antenna, including a plurality of antenna elements, each antenna element having a position in the receiving array antenna; a digitizer configured to receive an analog signal from each of the antenna elements, and to sample and digitize each of the analog signals to form a sequence of digitized samples from each of the analog signals; and a processing unit. The processing unit is configured to receive the sequences of sample values from the digitizer; and, for each direction of a plurality of hypothesized directions: combine the sample values from the plurality of antenna elements to form a single time record; fit the single time record with a combination of one or more functions of time; and identify a direction at which a measure of the magnitude of the linear combination is greatest.

    IMAGING SPECTROMETER WITH EXTENDED RESOLUTION
    40.
    发明申请
    IMAGING SPECTROMETER WITH EXTENDED RESOLUTION 有权
    具有扩展分辨率的成像光谱仪

    公开(公告)号：US20150369667A1

    公开(公告)日：2015-12-24

    申请号：US14312740

    申请日：2014-06-24

    Applicant: RAYTHEON COMPANY

    Inventor： Ian S. Robinson ,  John D. Bloomer ,  Bradley Flanders

    IPC: G01J3/453 ,  G01J3/06 ,  G01J3/02

    CPC classification number: G01J3/4535 ,  G01J3/0202 ,  G01J3/06 ,  G01J3/45 ,  G01J2003/4538

    Abstract: Interferometric transform spectrometer (ITS) systems and methods of operation thereof. In one example, an ITS system includes a Michelson interferometer that introduces a varying optical path length difference (OPD) between its two arms so as to produce an interferogram, a detector that receives and samples the interferogram, and a scan controller coupled to the detector and to Michelson interferometer. The scan controller controls the Michelson interferometer to vary the OPD in discrete steps such that the detector provides M samples of the interferogram for each of two scan segments. In the first scan segment, the M samples have a uniform or non-uniform sample spacing and the OPD has a first maximum value. In the second scan segment, the M samples have an incrementally increasing sample spacing and the OPD has a second maximum value that is at least twice the first maximum value.

    Abstract translation: 干涉测量变换光谱仪（ITS）系统及其操作方法。 在一个示例中，ITS系统包括迈克尔逊干涉仪，其在其两个臂之间引入变化的光程长度差（OPD），以产生干涉图，接收和采样干涉图的检测器，以及耦合到检测器的扫描控制器 和迈克尔逊干涉仪。 扫描控制器控制迈克尔逊干涉仪以离散步骤改变OPD，使得检测器为两个扫描段中的每一个提供干涉图的M个采样。 在第一扫描段中，M个样本具有均匀或不均匀的采样间隔，并且OPD具有第一最大值。 在第二扫描段中，M个采样具有逐渐增加的采样间隔，并且OPD具有至少为第一最大值的两倍的第二最大值。

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