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公开(公告)号：US11743083B2
公开(公告)日：2023-08-29
申请号：US16929916
申请日：2020-07-15
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
CPC classification number: H04L27/22 , H01P7/06 , H03D3/00 , H03D3/006 , H03D3/26 , H03H7/00 , H04L27/2334
Abstract: Disclosed is a microwave cavity resonator used as a phase change (phase modulation) to intensity change (intensity or amplitude modulation) converter. Certain aspects and embodiments include resonant circuits, such as a resistor, inductor and capacitor (RLC) circuit. Certain aspects and embodiments convert changes in phase to changes in output voltage to perform analog demodulation of a phase modulated microwave carrier. Certain aspects and embodiments use resonance when the reactive components of the circuit (capacitive and inductive components) are equal in magnitude and 180 degrees out of phase with one another, thereby cancelling out the reactance component of the circuit's impedance.
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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
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.
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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.
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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.
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公开(公告)号：US20210021351A1
公开(公告)日：2021-01-21
申请号：US16929798
申请日：2020-07-15
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Benjamin P. Dolgin , Gary M. Graceffo
IPC: H04B10/67 , H04B10/516 , H04B10/11
Abstract: Disclosed are optical communications systems and optical receivers including one or more optical cavity resonators. In particular, disclosed are methods and apparatus that allow for beam pointing to be maintained while permitting the receiver to tune the optical resonator to suit the wavelength, data rate and modulation format of the incoming optical signal, without requiring a coherent receiver or adaptive optics in addition to optical resonators.
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Patent Agency Ranking
公开(公告)号：US10826603B1
公开(公告)日：2020-11-03
申请号：US16698514
申请日：2019-11-27
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
IPC: H04B10/67 , H04B10/071 , H04B10/079 , H04B10/61 , H04B10/54
Abstract: Optical receivers and methods for tuning an operating point of an optical resonator, such as a Fabry-Perot etalon are disclosed. A free-space optical signal is received at an optical receiver and directed towards at least one beam splitter. After passing through the beam splitter, the optical signal is reflected off a surface of the optical resonator. The reflected signal is detected and utilized to tune the operating point of the optical resonator.
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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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公开(公告)号：US10169613B2
公开(公告)日：2019-01-01
申请号：US15052181
申请日：2016-02-24
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew Kowalevicz
Abstract: Generally discussed herein are systems, devices, and methods for waveform watermarking. A device can include an overt symbol modulator to receive mapped overt data and provide overt data modulated in accord with an overt data modulation scheme, a covert symbol modulator to receive mapped covert data and provide, using dither modulation and micro-amplitude modulation, covert data modulated in accord with a covert data modulation scheme, a switch to receive the modulated covert data and the modulated overt data and forward the covert data and modulated overt data based on a signal indicating whether covert data is to be transmitted or covert data is to be transmitted, and transmission circuitry to produce an electromagnetic waveform of the modulated data from the switch.
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公开(公告)号：US09989989B2
公开(公告)日：2018-06-05
申请号：US15581014
申请日：2017-04-28
Applicant: Raytheon Company
Inventor： Andrew Kowalevicz
CPC classification number: G06F1/12 , G09C1/00 , H04B1/0475 , H04L7/042 , H04L7/065 , H04L9/08 , H04L9/16 , H04L25/4902 , H04L43/0864 , H04L43/087
Abstract: A system and method for measuring time delays in a non-periodic system can include receiving a first host signal including transitions deviating from a true periodic signal, removing deviations from the true periodic signal to form a second host signal, detecting a phase of the first host signal and the second host signal relative to a common stable clock signal, and comparing the detected phase of the first host signal and the second host signal to produce a signal indicative of the deviation of the first host signal from the true periodic signal.
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公开(公告)号：US20180091230A1
公开(公告)日：2018-03-29
申请号：US15433326
申请日：2017-02-15
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
IPC: H04B10/69 , H04B10/11 , H04B10/516
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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