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公开(公告)号：US10243735B2
公开(公告)日：2019-03-26
申请号：US14950575
申请日：2015-11-24
Applicant: Raytheon Company
Inventor： Andrew Kowalevicz , Gary M. Graceffo
Abstract: Communication devices and a method of providing secure electronic content are general described. A plainmodulation containing user content is encrypted using a modulation key to form a ciphermodulation having a different magnitude and/or phase than the plainmodulation. Symbol representations of the plainmodulation and ciphermodulation in a QAM constellation are different. The ciphermodulation symbol representation is in a location non-coincident with an expected QAM constellation symbol. The symbol location of different plainmodulations when encypted using different modulation keys may be the same such that the corresponding ciphermodulation symbol representations are co-located. Different modulation keys are used for different plainmodulations, with a modulation key change occurring after transmission of a predetermined number of ciphermodulations and/or time. The modulation key and/or change is transmitted to enable coherent demodulation of the ciphermodulation to be performed. Multiple plainmodulations may be encrypted into a single ciphermodulation and/or a single plainmodulation may be encypted across multiple ciphermodulations.
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公开(公告)号：US10205526B2
公开(公告)日：2019-02-12
申请号：US15857141
申请日：2017-12-28
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz
IPC: H04B10/50 , H04B10/2575 , H04B10/00
Abstract: Optoelectronic oscillator systems and an optoelectronic oscillator noise reduction method. One example of an optoelectronic oscillator system includes an optical source positioned at a first end of a fiber-optic path, the optical source being configured to transmit an optical signal along the fiber-optic path, an optical modulator positioned to receive and modulate the optical signal based on at least a reference signal, a retro-reflector positioned at a second end of the fiber-optic path, the retro-reflector being configured to receive and retro-reflect the optical signal, the retro-reflected optical signal having at least a frequency range of inherent fiber noise canceled, and an optical circulator positioned along the fiber-optic path between the optical modulator and the retro-reflector, the optical circulator being configured to direct the optical signal to the retro-reflector and direct the retro-reflected optical signal along a feedback path to a first photodetector to generate the reference signal.
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公开(公告)号：US10177856B2
公开(公告)日：2019-01-08
申请号：US15679470
申请日：2017-08-17
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Benjamin P. Dolgin , Gary M. Graceffo
Abstract: Optical signal receivers and methods are provided that include an optical resonator that allows optical signal energy to enter and accumulate inside the optical resonator. A portion of optical signal energy is emitted from the optical resonator at an output, such that the emitted optical signal energy is disturbed when a transition occurs in the received optical signal energy. A detector aligned with the output detects the emitted optical signal energy and is configured to detect the disturbance to the emitted optical signal energy and determine a characteristic of the transition in the received optical signal energy based upon the disturbance.
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104.发明授权公开(公告)号：US10164765B2
公开(公告)日：2018-12-25
申请号：US15892799
申请日：2018-02-09
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Andrew Kowalevicz , Gary M. Graceffo
Abstract: Aspects are generally directed to optical receivers and methods for detecting a non-persistent communication superimposed on an overt communication channel. In one example, an optical receiver includes an optical resonator to receive an optical signal having one or more symbols encoded thereon at a modulated symbol repetition rate, the modulated symbol repetition rate being modulated relative to a nominal symbol repetition rate. The optical resonator is configured to emit an intensity-modulated output optical signal that has a variation in an intensity thereof corresponding to a symbol transition in the optical signal. The optical receiver further includes signal processing circuitry including a clock configured to generate a reference signal, a photodetector configured to generate a trigger signal, and a non-persistent communication decoder configured to determine a temporal misalignment between the symbol transition and the nominal symbol repetition rate based on the reference signal and the trigger signal.
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公开(公告)号：US20180367223A1
公开(公告)日：2018-12-20
申请号：US16002680
申请日：2018-06-07
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Benjamin P. Dolgin , Andrew Kowalevicz
IPC: H04B10/85 , H04B10/112 , H04B10/07 , H04B10/54 , H04B10/556 , H04B10/67
Abstract: Aspects are generally directed to free-space transmitters, free-space receivers, and free-space communication methods. In one example, a free-space communication method includes acts of mapping a data payload to one or more symbols based on a symbol set defined by a digital modulation scheme, varying one or more properties of a signal waveform to phase modulate the signal waveform with the data payload, the one or more symbols each having a symbol duration that defines a timing structure of the modulated signal waveform, and fragmenting the timing structure of the modulated signal waveform to conceal one or more waveform properties of the modulated signal waveform.
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Patent Agency Ranking
公开(公告)号：US10079706B2
公开(公告)日：2018-09-18
申请号：US15215937
申请日：2016-07-21
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew Kowalevicz
IPC: H04L27/20 , H04B7/0404 , H04B7/06
CPC classification number: H04L27/20 , H04B7/0404 , H04B7/06
Abstract: An apparatus, method and article of manufacture comprise a transceiver coupled to a phased array of antenna elements that are configured into pluralities of antenna elements to generate N modes of orthogonal radio waves where N is equal to or greater than 2. The coupling is via a plurality of 16-quadrature phase shift key (16-QPSK) modulators, each which is coupled to a respective one of the pluralities of antenna elements to modulate data onto a respective one of the N modes of orthogonal radio waves, to cause each of the N modes to operate as an independent data channel. For the case of N=2 modes, two 16-QPSK modulators generate independent 16-QPSK constellations, one for the first of the two modes and one for the second of the two modes, such that two 16-QPSK constellations are independent of each other, are orthogonal, and are on the same frequency.
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公开(公告)号：US20180145765A1
公开(公告)日：2018-05-24
申请号：US15816529
申请日：2017-11-17
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
CPC classification number: H04B10/615 , G02B17/004 , H04B10/54 , H04B10/676
Abstract: Aspects are generally directed to optical signal receivers and methods. In one example, a receiver includes a pump assembly configured to produce an encoded pump signal. The receiver includes an optical resonator positioned to receive an optical signal and the encoded pump signal, the optical resonator including an optical medium to accumulate resonant optical signal energy based on the optical signal, and the optical resonator being configured to emit output optical signal energy and disturb the output optical signal energy in response to a variation in the optical signal, the optical medium being further configured to modify a waveform shape of the output optical signal energy based on the encoded pump signal. The receiver further includes a detector to detect the output optical signal energy and determine a characteristic of the variation in the optical signal based on the waveform shape of the output optical signal energy.
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公开(公告)号：US09621178B2
公开(公告)日：2017-04-11
申请号：US15210230
申请日：2016-07-14
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew Kowalevicz
Abstract: Embodiments of clock authentication circuitry (CAC) are generally described herein. The CAC may comprise a compression component, such as a logic gate, to compress a candidate clock signal that is to be authenticated against a reference clock signal. The CAC may further comprise a digital-to-analog converter (DAC) that may be connected to an analog-to-digital converter (ADC) of the CAC. An ADC output sequence may be generated when a predetermined input sequence is input to the DAC while the DAC and the ADC are driven by the compressed candidate clock signal. The candidate clock signal may be authenticated based on an error measurement between the ADC output sequence and a reference ADC output sequence.
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公开(公告)号：US20170012732A1
公开(公告)日：2017-01-12
申请号：US14792977
申请日：2015-07-07
Applicant: Raytheon Company
Inventor： Andrew Kowalevicz , Gary M. Graceffo
IPC: H04J14/02
CPC classification number: H01Q21/00 , H01Q21/20 , H04B2210/006
Abstract: Methods and apparatus for an OAM system having simultaneous OAM states. In embodiments, m data streams are encoded and split into n copies each of which is delayed to produce a distinct RF orbital angular momentum (OAM) mode. The delayed copies are combined using wave division multiplexing. The combined m data streams are transmitted using n antenna elements.
Abstract translation: 具有同时OAM状态的OAM系统的方法和装置。 在实施例中，m个数据流被编码并分成n个副本，每个副本被延迟以产生不同的RF轨道角动量（OAM）模式。 延迟拷贝使用波分复用进行组合。 使用n个天线元件发送组合的m个数据流。
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公开(公告)号：US20160336977A1
公开(公告)日：2016-11-17
申请号：US15155490
申请日：2016-05-16
Applicant: Raytheon Company
Inventor： Andrew Kowalevicz , Thomas Borton , Michael C. Reese , Gary M. Graceffo
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 method for carrying data on a live host signal, comprising the steps of: varying timing in a host signal in response to data to be encoded, wherein variations in timing are smaller than a sampling period for detection and capture of the digital signal receiving the live host signal; sensing pulse timing variations in the received live host signal by comparison to a reference signal; and determining information in the sensed timing variations.
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