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公开(公告)号：US20210126715A1
公开(公告)日：2021-04-29
申请号：US17082545
申请日：2020-10-28
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
IPC: H04B11/00 , H04B13/02 , H04B10/524 , H04B10/548
Abstract: Methods and apparatus for acoustic to optical communications. In one example, a method includes performing active optical measurements of modulation-based surface deformations at a surface of a body of water using an active optical receiver to produce modulation data, the modulation-based surface deformations being representative of a modulation of a modulated acoustic signal originating beneath the surface of the body of water, between instances of performing the active optical measurements of the modulation-based surface deformations, optically measuring surface conditions of the body of water to produce channel information, and based on the modulation data and the channel information, recovering data encoded in the modulation of the modulated acoustic signal.
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公开(公告)号：US20210105073A1
公开(公告)日：2021-04-08
申请号：US17027177
申请日：2020-09-21
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz
IPC: H04B10/61
Abstract: An optical communications receiver and a process for decoding an FSK modulated optical signal are disclosed. The receiver and process are configured to receive the FSK modulated optical input signal and to produce an electrical output signal having characteristics representative of FSK modulation of the FSK modulated input signal, and to process the electrical output signal to produce a decoded information signal.
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公开(公告)号：US10571774B2
公开(公告)日：2020-02-25
申请号：US16296481
申请日：2019-03-08
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
Abstract: Optical receivers configured to demodulate phase modulated optical signals. In one example, an optical signal receiver includes an optical resonator configured to receive an arriving optical signal and to emit an output optical signal in response to receiving the arriving optical signal, the optical resonator being further configured to transform phase transitions corresponding to phase modulation of the arriving optical into intensity modulation of the output optical signal, an opto-electrical converter configured to convert the output optical signal into an electrical signal, a pulse detector configured to detect pulses in the electrical energy indicative of the phase transitions in the arriving optical signal, and a memory configured to record timing information associated with the pulses detected by the pulse detector.
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公开(公告)号：US10554306B1
公开(公告)日：2020-02-04
申请号：US16352284
申请日：2019-03-13
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Benjamin P. Dolgin , Andrew Kowalevicz
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：US10411926B2
公开(公告)日：2019-09-10
申请号：US16148754
申请日：2018-10-01
Applicant: Raytheon Company
Inventor： Benjamin Dolgin , Gary M. Graceffo , Andrew Kowalevicz
Abstract: A phase detection system includes first and second phase mixing circuits in signal communication with a signal phase adjuster module. The first mixing circuit generates a first digital modulated frequency signal based on an input signal and a first reference phase signal. The second mixing circuit generates a second digital modulated frequency signal based on the input signal and a second reference phase signal, which phase shifted with respect to the first reference phase signal. The phase detection system further includes a phase identification (ID) module in signal communication with the first mixing circuit and the second mixing circuit. The phase ID module generates a phase signal based on the first digital modulated frequency signal and the second digital modulated frequency signal. The phase signal indicates a phase of the input signal.
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Patent Agency Ranking
公开(公告)号：US10374743B2
公开(公告)日：2019-08-06
申请号：US16156065
申请日：2018-10-10
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
Abstract: Optical signal receivers and methods are provided that include an optical resonator that allows optical signal energy of multiple wavelengths to enter and accumulate inside the optical resonator. A portion of optical signal energy of each wavelength is emitted from the optical resonator at an output, and the individual wavelengths may be separated. A detector aligned with the output detects the emitted optical signal energy of at least one of the wavelengths. The detector is configured to detect disturbances to the emitted optical signal energy and determine a modulated characteristic in the received optical signal energy of the wavelength.
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公开(公告)号：US20190036748A1
公开(公告)日：2019-01-31
申请号：US16148754
申请日：2018-10-01
Applicant: Raytheon Company
Inventor： Benjamin Dolgin , Gary M. Graceffo , Andrew Kowalevicz
CPC classification number: H04L27/20 , H04L5/0048 , H04L27/16
Abstract: A phase detection system includes first and second phase mixing circuits in signal communication with a signal phase adjuster module. The first mixing circuit generates a first digital modulated frequency signal based on an input signal and a first reference phase signal. The second mixing circuit generates a second digital modulated frequency signal based on the input signal and a second reference phase signal, which phase shifted with respect to the first reference phase signal. The phase detection system further includes a phase identification (ID) module in signal communication with the first mixing circuit and the second mixing circuit. The phase ID module generates a phase signal based on the first digital modulated frequency signal and the second digital modulated frequency signal. The phase signal indicates a phase of the input signal.
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公开(公告)号：US20190007091A1
公开(公告)日：2019-01-03
申请号：US16018159
申请日：2018-06-26
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
Abstract: An optical receiver and communication method receives an optical signal by an optical resonator to provide an intensity modulated signal indicative of a modulation of the optical signal. The intensity modulated signal is provided to a channel receiver of a plurality of channel receivers, and the channel receiver recovers from the intensity modulated signal a multipath version of a transmitted signal embedded in the modulation of the optical signal. The channel receiver's output is combined with an output of at least one other of the plurality of channel receivers to provide a combined output signal.
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公开(公告)号：US10091039B2
公开(公告)日：2018-10-02
申请号：US15458233
申请日：2017-03-14
Applicant: Raytheon Company
Inventor： Benjamin Dolgin , Gary M. Graceffo , Andrew Kowalevicz
Abstract: A phase detection system includes first and second phase mixing circuits in signal communication with a signal phase adjuster module. The first mixing circuit generates a first digital modulated frequency signal based on an input signal and a first reference phase signal. The second mixing circuit generates a second digital modulated frequency signal based on the input signal and a second reference phase signal, which phase shifted with respect to the first reference phase signal. The phase detection system further includes a phase identification (ID) module in signal communication with the first mixing circuit and the second mixing circuit. The phase ID module generates a phase signal based on the first digital modulated frequency signal and the second digital modulated frequency signal. The phase signal indicates a phase of the input signal.
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公开(公告)号：US20180167145A1
公开(公告)日：2018-06-14
申请号：US15816670
申请日：2017-11-17
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Andrew Kowalevicz , Gary M. Graceffo
CPC classification number: H04B10/671 , G02B5/284 , G02B5/285 , G02F7/00 , H04B10/67
Abstract: Aspects are generally directed to optical signal receivers and methods. In one example, a receiver includes an optical resonator assembly configured to receive an optical signal at each of a plurality of optical resonators, each optical resonator configured to resonate optical signal energy at a corresponding frequency of the received optical signal, each optical resonator being tuned to a different corresponding frequency of the received optical signal, and each optical resonator being configured to output corresponding output optical signal energy. The receiver includes a detector assembly to detect the corresponding output optical signal energy from each optical resonator, and a signal processing circuit configured detect a frequency variation of the received optical signal based on the corresponding output optical signal energy from at least two of the plurality of optical resonators, and configured to generate a digital signal based on the frequency variation.
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