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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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公开(公告)号：US20180091227A1
公开(公告)日：2018-03-29
申请号：US15717736
申请日：2017-09-27
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
IPC: H04B10/61
CPC classification number: H04B10/616 , H04B10/11 , H04B10/5561 , H04B10/615
Abstract: Aspects are generally directed to receivers and methods for optically demodulating optical signals. In one example, a receiver includes an optical resonator to receive an optical signal, the optical resonator including an optical medium interposed between first and second semi-reflective surfaces, where the first and second semi-reflective surfaces are positioned to resonate optical signal energy, and the optical resonator is configured to disrupt the optical signal energy resonance responsive to a variation in the received optical signal. The receiver may further include a probe source positioned to provide an optical probe beam to the optical medium, the optical medium being configured to interrupt the optical probe beam during the optical signal energy resonance and to transmit at least a portion of the optical probe beam in response to the disruption of the optical signal energy resonance, and a detector to detect the transmitted portion of the optical probe beam.
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公开(公告)号：US09900031B2
公开(公告)日：2018-02-20
申请号：US15155490
申请日：2016-05-16
Applicant: Raytheon Company
Inventor： Andrew Kowalevicz , Tom 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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公开(公告)号：US20170317712A1
公开(公告)日：2017-11-02
申请号：US15496375
申请日：2017-04-25
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew Kowalevicz
CPC classification number: H04B1/707 , H04B1/713 , H04J13/0018 , H04L9/001
Abstract: A system, method, and computer program product for chaotically generating a pseudorandom number sequence, such as for use in spread spectrum communications systems and in cryptographic systems. Chaotically generated pseudorandom numbers are not cyclostationary in nature, so output values encoded via such non-cyclostationary bases have no clear correlations. Spread signal communications systems using chaotically generated spreading codes thus operate without rate line artifacts, increasing their resistance to signal detection and to determinations of underlying signal chip rates and signal symbol rates. Broadcasts and guided transmissions (including either conductive wire or optical transmission media), in both radio frequency and optical systems are supported. Common spread spectrum communications systems including DSSS and FHSS may be strengthened through the use of chaotically generated spreading codes. Similarly, keys and nonces generated for cryptographic systems may be improved over those based on conventionally generated pseudorandom numbers.
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公开(公告)号：US20170150348A1
公开(公告)日：2017-05-25
申请号：US14950575
申请日：2015-11-24
Applicant: Raytheon Company
Inventor： Andrew Kowalevicz , Gary M. Graceffo
CPC classification number: H04L9/0869 , H04L9/0816 , H04L9/3273 , H04L27/2075 , H04L27/345 , H04L2209/24 , H04L2209/80 , H04W12/02
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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Patent Agency Ranking
公开(公告)号：US20170150347A1
公开(公告)日：2017-05-25
申请号：US14950552
申请日：2015-11-24
Applicant: Raytheon Company
Inventor： Andrew Kowalevicz , Gary M. Graceffo
CPC classification number: H04W12/02 , H04L9/0643 , H04L9/065 , H04L9/0891 , H04L2209/80 , H04W4/80 , H04W80/06
Abstract: Communication devices and a method of providing secure electronic content are general described. Content is encrypted using a time-invariant encryption algorithm on the binary bits and a time-varying baseband key encryption waveform with a time-varying phase or amplitude. The content is recovered using a waveform with a reference phase mixed with a reference LO signal or combining the waveform and content using an XOR to measure a change of the phase/amplitude of the received signal relative to the LO signal. The key for the time-invariant binary bit level encryption may be communicated on a different channel than the content prior to communication of the content or concurrently with the content. The phase/amplitude of the baseband key may vary after baseband waveform encryption of a predetermined number of symbols, independent of the time, or after a predetermined time independent of an amount of baseband signal encrypted.
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公开(公告)号：US09553687B1
公开(公告)日：2017-01-24
申请号：US14192628
申请日：2014-02-27
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew M. Kowalevicz
IPC: H04J11/00
CPC classification number: H04J11/00
Abstract: A system for transmitting data using orthogonal mode division multiplexing (OMDM), a multiplexing method derived from the orbital angular momentum of photons. In one embodiment, a transmitter transmits multiple superimposed radio frequency (RF) beams each independently modulated with data, and each with a different orbital angular momentum rotational state. An OMDM receiver receives the different rotational states in separate communications channels. The OMDM states are substantially orthogonal, providing independent data channels for increased data capacity, and providing privacy.
Abstract translation: 一种使用正交模分多路复用（OMDM）发送数据的系统，一种从光子的轨道角动量导出的复用方法。 在一个实施例中，发射机发射多个叠加的射频（RF）波束，每个射频波束用数据独立调制，每个具有不同的轨道角动量旋转状态。 OMDM接收机在单独的通信信道中接收不同的旋转状态。 OMDM状态基本正交，提供用于增加数据容量的独立数据通道，并提供隐私。
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18.发明授权Methods and apparatus for constant baud rate communication with varying effective data rate 有权用于恒定波特率通信的方法和装置，具有不同的有效数据速率公开(公告)号：US09525574B1
公开(公告)日：2016-12-20
申请号：US14853067
申请日：2015-09-14
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew Kowalevicz
IPC: H04B1/69 , H04B1/707 , H04B1/713 , H04L25/493 , H04B1/04
CPC classification number: H04L25/493 , H04B1/0003 , H04B1/0475
Abstract: Methods and apparatus for transmitting data at a varying effective data rate (EDR) at a constant baud rate by encoding the data prior to transmission with a sequence. In embodiments, the sequence comprises a pseudo random number sequence, Barker sequence, and/or other sequence. Embodiments of a receiver decode the data transmitted at a varying effective data rate (EDR) at a constant baud rate by encoding the data prior to transmission with a sequence.
Abstract translation: 用于以恒定波特率以变化的有效数据速率（EDR）发送数据的方法和装置，通过在用序列传输之前对数据进行编码。 在实施方案中，序列包含伪随机数序列，巴克序列和/或其他序列。 接收机的实施例通过在用序列传输之前对数据进行编码，以恒定的波特率来解码以变化的有效数据速率（EDR）发送的数据。
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公开(公告)号：US20160267815A1
公开(公告)日：2016-09-15
申请号：US14704900
申请日：2015-05-05
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew M. Kowalevicz
IPC: G09C1/00
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 provide a signal carrier; an overt persistent digital channel containing a host signal and carried on the signal carrier; a non-persistent channel encoded onto the host signal by timing variation of the host signal, the non-persistent channel including access data for accessing hidden information in the host signal
Abstract translation: 系统和方法提供信号载体; 包含主机信号并承载在信号载体上的公开持续数字信道; 通过主机信号的定时变化编码到主机信号上的非持久信道，非持久信道包括用于访问主机信号中的隐藏信息的接入数据
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20.发明授权公开(公告)号：US11909444B2
公开(公告)日：2024-02-20
申请号：US17670119
申请日：2022-02-11
Applicant: RAYTHEON COMPANY
Inventor： James Talamonti , Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
IPC: H04B10/2581 , H04B10/67 , H04B10/071
CPC classification number: H04B10/2581 , H04B10/071 , H04B10/67
Abstract: An optical signal receivers, systems including the optical signal receivers, and methods of operating the same include a multimode fiber circulator including a first port, a second port, and a third port, a first multimode fiber cable coupled to the first port and having an input configured to receive a complex modulated optical signal and provide the complex modulated optical signal to the first port of the multimode fiber circulator, a second multimode fiber cable including a low Q optical resonator coupled to the second port of the multimode fiber circulator that is configured to receive the complex modulated optical signal from the second port of the multimode circulator, and a third multimode fiber cable coupled to the third port of the multimode fiber circulator that is configured to receive a reflected optical signal from the third port of the multimode circulator, the reflected optical signal being reflected from the low Q optical resonator.
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