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    Baseband data reduction and compression algorithm
    2.
    发明授权
    Baseband data reduction and compression algorithm 有权

    公开(公告)号：US11683205B2

    公开(公告)日：2023-06-20

    申请号：US17380772

    申请日：2021-07-20

    Applicant: RAYTHEON COMPANY

    Inventor： Gary M. Graceffo ,  Andrew Kowalevicz ,  Benjamin P. Dolgin

    IPC: H04L25/49 ,  H04L27/00

    CPC classification number: H04L25/4904 ,  H04L25/4906 ,  H04L27/0002

    Abstract: A system and method for recovering encoded data from a modulated baseband signal is disclosed. Aspects and embodiments of the system and method include receiving an analog input signal representing a modulated baseband signal, counting clock cycles of a reference clock, detecting a first transition and a second transition of the analog input signal indicating a first change and a second change in the modulated baseband signal, storing a first counter value corresponding to an amount of clock cycles elapsed between the first transition and the second transition, and determining a binary-valued bit sequence corresponding to the first counter value.

    DIFFERENTIAL PROBE WITH SINGLE TRANSCEIVER ANTENNA
    3.
    发明公开
    DIFFERENTIAL PROBE WITH SINGLE TRANSCEIVER ANTENNA 审中-公开

    公开(公告)号：US20230170926A1

    公开(公告)日：2023-06-01

    申请号：US17538305

    申请日：2021-11-30

    Applicant: Raytheon Company

    Inventor： Benjamin P. Dolgin ,  Thomas G. Lavedas ,  Joseph J. Fraundorfer

    IPC: H04B1/38 ,  H04B1/18 ,  H04B1/3805

    CPC classification number: H04B1/38 ,  H04B1/18 ,  H04B2001/3811

    Abstract: An apparatus includes an antenna, a transmitter configured to generate an outgoing electrical signal, and a receiver configured to receive an incoming electrical signal. The apparatus also includes a transformer configured to couple the antenna and the transmitter such that the outgoing electrical signal causes the antenna to radiate outgoing electromagnetic energy, couple the antenna and the receiver such that the incoming electrical signal is based on incoming electromagnetic energy received by the antenna, and electrically isolate the transmitter and the receiver. The antenna may include inner and outer compensating coils, the compensating coils may be configured to additively radiate the outgoing electromagnetic energy, and the incoming electrical signal may be based on a difference between the incoming electromagnetic energy as received by the compensating coils.

    Method for fully-networkable single aperture free-space optical transceiver
    4.
    发明授权
    Method for fully-networkable single aperture free-space optical transceiver 有权

    公开(公告)号：US11595129B2

    公开(公告)日：2023-02-28

    申请号：US17112703

    申请日：2020-12-04

    Applicant: RAYTHEON COMPANY

    Inventor： Andrew Kowalevicz ,  Gary M. Graceffo ,  Benjamin P. Dolgin

    IPC: H04B10/00 ,  H04B10/40 ,  H04B10/532

    Abstract: Monostatic optical transceivers, systems, and methods of operating the same include a single aperture, a transmitter that provides a modulated and polarized optical transmit beam, a receiver that receives a modulated and polarized optical receive beam at an optical resonator included therein and processes the received optical receive beam to determine information from the received optical receive beam, a polarizing beam splitter that reflects the optical transmit beam, a polarization rotator that rotates the polarization of the reflected optical transmit beam by a fixed number of degrees in a transmit direction in a coordinate system of the monostatic transceiver, and a waveplate that modifies the polarization of the rotated optical transmit beam.

    Demodulation methods and devices for frequency-modulated (FM) signals
    5.
    发明授权
    Demodulation methods and devices for frequency-modulated (FM) signals 有权

    公开(公告)号：US11251783B1

    公开(公告)日：2022-02-15

    申请号：US17122872

    申请日：2020-12-15

    Applicant: Raytheon Company

    Inventor： Benjamin P. Dolgin ,  Andrew M. Kowalevicz ,  Gary M. Graceffo

    IPC: H03K5/00 ,  H03K5/19 ,  H03K7/06 ,  H03K5/1534

    Abstract: An apparatus includes a phase modulator configured to modulate a phase of an incoming frequency-modulated signal based on a clock signal to generate a phase-modulated signal, where the clock signal is associated with a clock frequency. The apparatus also includes an etalon configured to receive the phase-modulated signal and generate an output signal based on the phase-modulated signal. The apparatus further includes a detector configured to identify amplitudes associated with a first harmonic of the clock frequency and a first subharmonic of the clock frequency in the output signal. In addition, the apparatus includes a decoder configured to recover information encoded in the incoming frequency-modulated signal based on instantaneous frequency deviations of the incoming frequency-modulated signal, where the instantaneous frequency deviations are identified based on relative amplitudes of the first harmonic and the first subharmonic.

    Constant envelope path-dependent phase modulation
    7.
    发明授权
    Constant envelope path-dependent phase modulation 有权

    公开(公告)号：US10924189B2

    公开(公告)日：2021-02-16

    申请号：US16778916

    申请日：2020-01-31

    Applicant: RAYTHEON COMPANY

    Inventor： Andrew Kowalevicz ,  Benjamin P. Dolgin ,  Gary M. Graceffo

    IPC: H04B10/556 ,  H04L27/20 ,  H04B10/516

    Abstract: Optical transmitters configured to modulate optical signals with a path-dependent phase modulation scheme. In certain examples, an optical transmitter includes an optical source that emits a carrier waveform, a modulator configured to modulate the carrier waveform according to a path-dependent phase modulation scheme to produce a modulated optical signal, a mapping module configured to map a data payload to the path-dependent phase modulation scheme, each symbol in the path-dependent phase modulation scheme including a concatenation of at least one location bit and a path bit, the at least one location bit identifying an amount of a phase transition in the modulated optical signal and the path bit identifying a direction of the phase transition, and a pulse-shaping filter configured to control the modulator, based on an output from the mapping module, to impose the path-dependent phase modulation scheme on the carrier waveform to generate the modulated optical signal.

    Systems and methods for detection and demodulation of optical communication signals
    10.
    发明授权
    Systems and methods for detection and demodulation of optical communication signals 有权

    公开(公告)号：US10530494B2

    公开(公告)日：2020-01-07

    申请号：US15433326

    申请日：2017-02-15

    Applicant: RAYTHEON COMPANY

    Inventor： Benjamin P. Dolgin ,  Gary M. Graceffo ,  Andrew Kowalevicz

    IPC: H04B10/67 ,  H04B10/114

    Abstract: A free-space optical signal receiver includes a plurality of detectors whose individual outputs are delayed to correct for variations in arrival time caused by aberration in the medium through which the optical signal propagates, and combined to provide a single output. Each of the plurality of detectors sense the free-space modulated optical signal and provide a detector signal representative of the modulation of the optical signal. Each detector signal is delayed by a delay value to generate a delayed signal, and each delay value is selected to correct for variation in arrival time of the optical signal at each of the detectors, resulting in the delayed signals being substantially time-aligned. The delayed signals are constructively combined into a combined signal representative of the modulation aspect, and the combined signal is provided as an output.

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