Patents by Inventor George C. Valley

George C. Valley has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10095262
    Abstract: Under one aspect, a method for performing a linear algebra operation includes imposing matrix elements onto a chirped optical carrier; inputting into a multi-mode optic the matrix elements imposed on the chirped optical carrier; outputting by the multi-mode optic a speckle pattern based on the matrix elements imposed on the optical carrier; and performing a linear algebra operation on the matrix elements based on the speckle pattern. The matrix elements can be from matrix A and a vector b, and the multi-mode optic can optically transform each of matrix A and vector b by a speckle transformation S, so as to output a speckle pattern including elements of a matrix SA of dimension p,n and matrix elements of a vector Sb of dimension p. The linear algebra operation can include generating {tilde over (x)}=(SA)†Sb, wherein † indicates a pseudo-inverse operation.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: October 9, 2018
    Assignee: The Aerospace Corporation
    Inventors: George C. Valley, Thomas Justin Shaw
  • Publication number: 20180165248
    Abstract: Under one aspect, a method for performing a linear algebra operation includes imposing matrix elements onto a chirped optical carrier; inputting into a multi-mode optic the matrix elements imposed on the chirped optical carrier; outputting by the multi-mode optic a speckle pattern based on the matrix elements imposed on the optical carrier; and performing a linear algebra operation on the matrix elements based on the speckle pattern. The matrix elements can be from matrix A and a vector b, and the multi-mode optic can optically transform each of matrix A and vector b by a speckle transformation S, so as to output a speckle pattern including elements of a matrix SA of dimension p,n and matrix elements of a vector Sb of dimension p. The linear algebra operation can include generating {tilde over (x)}=(SA)†Sb, wherein † indicates a pseudo-inverse operation.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 14, 2018
    Inventors: George C. Valley, Thomas Justin Shaw
  • Publication number: 20170285100
    Abstract: Under one aspect, a method is provided for detecting events that are sparse in time. The method can include (a) receiving N analog input signals that are continuous and are independent from one another, wherein each one of the events causes a change in a corresponding one of the analog input signals, and N is 2 or greater. The method also can include (b) by a first analog circuit, for each of the N analog input signals, outputting products of that analog input signal and a plurality of gain factors. The method also can include (c) by a second analog circuit, outputting M sums of the products, wherein M is 2 or greater and is less than or equal to N. The method also can include (d) detecting a first one of the events based on the M sums of the products.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 5, 2017
    Inventors: Robert H. Nelson, George C. Valley, Susan H. Crain
  • Patent number: 9413372
    Abstract: A multi-mode optic can receive as input a radio-frequency (RF) signal imposed on an optical carrier, and can output a speckle pattern. A digital representation of the radio-frequency signal can be obtained based on the speckle pattern. An optical sensor can be irradiated with a first portion of the speckle pattern, the first portion of the speckle pattern including an optical intensity profile that is different than an optical intensity profile of a second, spatially separated, portion of the speckle pattern. The multi-mode optic can impose the optical intensity profile on the first portion of the speckle pattern as a function of wavelength of the optical carrier. The optical intensity profiles of portions of the speckle pattern can define a mixing matrix. The digital representation of the RF signal can be obtained based on an output of the optical sensor and the mixing matrix.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: August 9, 2016
    Assignee: The Aerospace Corporation
    Inventors: George C. Valley, George A. Sefler
  • Patent number: 9277138
    Abstract: An image detection assembly includes a light source that is configured to generate at least one pulsed light beam. A modulator is configured to direct the pulsed light beam onto a device via a plurality of light patterns such that a plurality of electrical signals are generated by the device. Each electrical signal corresponds to a different light pattern. A signal processing apparatus is coupled to the device and the signal processing apparatus is configured to receive the electrical signals and to digitize each electrical signal to record a plurality of signal vectors such that each signal vector corresponds to a different electrical signal. The signal processing apparatus is also configured to generate at least one image output based, at least in part, on the recorded signal vectors and the light patterns such that the image output enables a determination of at least one transient effect on the device.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: March 1, 2016
    Assignee: The Aerospace Corporation
    Inventors: Adam Wayne Bushmaker, Terence S. Yeoh, George C. Valley
  • Patent number: 8902096
    Abstract: Systems and methods for converting wideband signals into the digital domain are provided herein. The system may include an electronic or guided-wave optic based replicator configured to obtain at least M replicas of a signal applied thereto, and an electronic or guided-wave optic based segmenter configured to segment a signal applied thereto into at least N segments based on time or wavelength. Together, the replicator and the segmenter obtain M×N segment replicas of the received signal. An electronic or guided-wave optic based mixer is configured to multiply the M×N segment replicas by a mixing matrix having dimension M×N and then to form M integrations each of N segment replicas so as to obtain a measurement vector of length M. A signal recovery processor is configured to obtain a digital representation of the received signal based on the measurement vector and the mixing matrix.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 2, 2014
    Assignee: The Aerospace Corporation
    Inventors: George C. Valley, George Sefler, Thomas Justin Shaw
  • Publication number: 20140266826
    Abstract: Systems and methods for converting wideband signals into the digital domain are provided herein. The system may include an electronic or guided-wave optic based replicator configured to obtain at least M replicas of a signal applied thereto, and an electronic or guided-wave optic based segmenter configured to segment a signal applied thereto into at least N segments based on time or wavelength. Together, the replicator and the segmenter obtain M×N segment replicas of the received signal. An electronic or guided-wave optic based mixer is configured to multiply the M×N segment replicas by a mixing matrix having dimension M×N and then to form M integrations each of N segment replicas so as to obtain a measurement vector of length M. A signal recovery processor is configured to obtain a digital representation of the received signal based on the measurement vector and the mixing matrix.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: The Aerospace Corporation
    Inventors: George C. VALLEY, George SEFLER, Thomas Justin SHAW
  • Patent number: 8334797
    Abstract: A method of performing analog to digital conversation of an analog signal Vin(t), the method including the steps of: utilizing both of the complementary arms of an electro-optic modulator to recover the analog input signal Vin(t), while using only one time-stretch element and one ?-demultiplexer after the electro-optic modulator. The single time-stretch element and one ?-demultiplexer serve to stretch and demultiplex the signals from both of the complementary output arms of the electro-optic modulator thereby improving and simplifying post-processing algorithms used to correct for static distortions and nonlinearities that originate from imperfect photonic hardware. Double-balanced photoreceivers are preferably coupled to outputs of the single ?-demultiplexer. The single time-stretch element is preferably implemented by a chirped fiber grating. Apparatus for carrying out the method is described.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: December 18, 2012
    Assignees: HRL Laboratories, LLC, Aerospace Corp.
    Inventors: Willie W. Ng, George C. Valley, George Anthony Sefler
  • Patent number: 8026837
    Abstract: Systems and methods for converting wideband signals in the optical domain are provided. A device for obtaining a digital representation of a received signal may include a spatially dispersive element that may be configured to spatially disperse frequencies in an optical-domain representation of the received signal; a spatial light modulator that may be configured to mix the dispersed optical frequencies by imposing a mixing matrix on an optical intensity of the dispersed optical frequencies; an optical sensor that may be configured to obtain an electrical representation of the mixed dispersed optical frequencies; and a signal recovery processor that may be configured to obtain a digital representation of the received signal based on the electrical representation and the mixing matrix. The signal recovery processor may be further configured to determine a modulation format of the digital representation and may demodulate the digital representation based on the modulation format.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: September 27, 2011
    Assignee: The Aerospace Corporation
    Inventors: George C. Valley, George A. Sefler
  • Patent number: 7620529
    Abstract: The present invention comprises a method, an apparatus, and a computer program product for simulating a mixed-signal system. The invention comprises a first operation of generating a matrix-based wavelet operator representation of equations characterizing a system, with the matrix-based wavelet operator representation including wavelet connection coefficients. A second operation is performed by selecting a number of wavelets and a set of wavelet basis functions with which to represent a performance of the system, whereby the wavelet operator, the number of wavelets and the set of wavelet basis functions represent a wavelet model of the system. A third operation is performed by iteratively applying the wavelet model over a series of clock cycles to develop a behavioral model of the system. The invention has particular use in the area of computer-aided design and may be applied to any suitable system, whether electrical, mechanical, or other.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: November 17, 2009
    Assignees: HLR Laboratories, Aerospace Corporation
    Inventors: George C. Valley, Peter Petre, Shubha Kadambe, Todd S. Kaplan
  • Patent number: 7409160
    Abstract: A satellite constellation has a plurality of network satellites that form a network. A gateway satellite is disposed adjacent to the network. The gateway satellites receive an optical signal from the network and converts the signal to an electrical signal. The gateway satellite has a sorter and a reshaping circuit for reshaping the electrical signal to form a reshaped signal. The electrical signal is converted back to an optical signal corresponding to the reshaped signal. The optical signal corresponding to the reshaped signal has reduced noise in comparison to the input optical signal. The optical signal is then retransmitted to another satellite.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: August 5, 2008
    Assignee: The DIRECTV Group, Inc.
    Inventors: George C. Valley, Stanislav I. Ionov, Anthony S. Acampora, Hossein H. Izadpanah
  • Patent number: 7103280
    Abstract: A satellite constellation has a plurality of satellites. Each of the satellites has an RF ground link for communicating with a ground station and an optical link for communication with at least one of the plurality of satellites. Each of the satellites has a reconfigurable optical transmitter for sending and receiving data streams. Each reconfigurable optical transmitter has a first optical carrier associated therewith and a reconfigurable optical receiver. The plurality of satellites is arranged to have a first subset of satellites. The first subset of satellites is configured to communicate. The plurality of satellites is reconfigured to have a second subset of satellites having at least one different satellites than that of said first subset. The second subset supercedes the first subset. The second subset of satellites is configured to communicate. Various subset around the globe may form local area networks. The local area networks are preferably optically coupled to form a wide area network.
    Type: Grant
    Filed: June 5, 1999
    Date of Patent: September 5, 2006
    Assignee: The DirecTV Group, Inc.
    Inventors: Stanislav I. Ionov, George C. Valley, Anthony S. Acampora
  • Patent number: 6912075
    Abstract: A node for satellite system communications between a ground station and a satellite includes a fiber optic bus on the satellite. An optical drop is coupled to the bus. The optical drop resolves an optical signal destined to the given satellite from the optical bus. An uplink and downlink receive and transmit communications from a ground terminal. A router is coupled to the optical drop and the uplink and downlink. An address reader and a table are used by the router to determine the destination of the received RF signals. The received RF signals are converted to optical signals by an optical source. The optical source has a wavelength that corresponds with the destination satellite. The optical signals are transmitted to an adjacent satellite by an optical transmitter such as a transmitting telescope.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: June 28, 2005
    Assignee: The DIRECTV Group, Inc.
    Inventors: Stanislav I. Ionov, George C. Valley
  • Publication number: 20040264970
    Abstract: A satellite constellation has a plurality of network satellites that form a network. A gateway satellite is disposed adjacent to the network. The gateway satellites receive an optical signal from the network and converts the signal to an electrical signal. The gateway satellite has a sorter and a reshaping circuit for reshaping the electrical signal to form a reshaped signal. The electrical signal is converted back to an optical signal corresponding to the reshaped signal. The optical signal corresponding to the reshaped signal has reduced noise in comparison to the input optical signal. The optical signal is then retransmitted to another satellite.
    Type: Application
    Filed: July 19, 2004
    Publication date: December 30, 2004
    Inventors: George C. Valley, Stanislav I. Ionov, Anthony S. Acampora, Hossein H. Izadpanah
  • Publication number: 20040172226
    Abstract: The present invention comprises a method, an apparatus, and a computer program product for simulating a mixed-signal system. The invention comprises a first operation of generating a matrix-based wavelet operator representation of equations characterizing a system, with the matrix-based wavelet operator representation including wavelet connection coefficients. A second operation is performed by selecting a number of wavelets and a set of wavelet basis functions with which to represent a performance of the system, whereby the wavelet operator, the number of wavelets and the set of wavelet basis functions represent a wavelet model of the system. A third operation is performed by iteratively applying the wavelet model over a series of clock cycles to develop a behavioral model of the system. The invention has particular use in the area of computer-aided design and may be applied to any suitable system, whether electrical, mechanical, or other.
    Type: Application
    Filed: October 14, 2003
    Publication date: September 2, 2004
    Inventors: George C. Valley, Peter Petre, Shubha Kadambe, Todd S. Kaplan
  • Patent number: 6735398
    Abstract: A method and system for generating single and multi-channel optical analog pulse-position modulation waveforms are disclosed. The system comprises a frequency modulator, a continuous wave optical source, and an optical modulator. The frequency modulator receives the analog signal and converts the analog signal into a frequency modulated signal. The optical modulator modulates the continuous wave optical source with the frequency modulated signal, to produce the optical pulse-position modulated signal. The method comprises converting an analog input signal into a frequency modulated signal amplifying the frequency modulated signal and producing a large signal therein, modulating a continuous wave optical source with the large signal, therein producing the optical pulse-position modulation signal, and compressing the optical pulse-position modulation signal, therein increasing a processing gain.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: May 11, 2004
    Assignee: Hughes Electronics Corporation
    Inventors: Hossein Izadpanah, Stanislav I. Ionov, Robert R. Hayes, George C. Valley
  • Patent number: 6466349
    Abstract: An integrated optical transmitter includes a modulator drive circuit in communication with a modulator, and a laser drive circuit in communication with a laser. The modulator receives laser light from the laser and modulation control signals from the modulator drive circuit, and outputs modulated optical signals in a direction normal to the substrate surface. The transmitter is integrated by securing the laser to the modulator using flip chip technology. The laser includes a vertical cavity, and is optically aligned with the horizontal coupling surface of the modulator during the flip chip process.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: October 15, 2002
    Assignee: Hughes Electronics Corporation
    Inventors: George C. Valley, Kenneth R. Elliott, Alan R. Kost, Daniel Yap
  • Patent number: 5903323
    Abstract: A system and technique for directing intensity modulated electromagnetic energy. The inventive system (10) includes an intensity modulated source of electromagnetic energy (12). Individual elements (22) in an array of energy directing elements (15) are activated in sync with the modulation of energy source (12). In a particular implementation, the source (12) is a laser. The intensity of the laser is reduced during each successive field per frame. The energy directing elements (15), in this case--light directing elements, are implemented with an array of digital micromirrors. The light source (12) is modulated in intensity in accordance with a fixed modulation scheme. The mirrors (22) are selectively activated relative to the light source modulation scheme. Hence, the invention provides a gray scale output while allowing the time between mirror flips to be constant.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: May 11, 1999
    Assignee: Raytheon Company
    Inventors: Michael N. Ernstoff, George C. Valley, Steven E. Shields
  • Patent number: 5668611
    Abstract: A system and technique for directing intensity modulated electromagnetic energy. The inventive system (10) includes an intensity modulated source of electromagnetic energy (12). Individual elements (22) in an array of energy directing elements (15) are activated in sync with the modulation of the energy source (12). In a particular implementation, the source (12) is a laser. The intensity of the laser is reduced during each successive field per frame. The energy directing elements (15), in this case, light directing elements, are implemented with an array of digital micromirrors. The light source (12) is modulated in intensity in accordance with a fixed modulation scheme. The mirrors (22) are selectively activated relative to the light source modulation scheme. Hence, the invention provides a gray scale output while allowing the time between mirror flips to be constant.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: September 16, 1997
    Assignee: Hughes Electronics
    Inventors: Michael N. Ernstoff, George C. Valley, Steven E. Shields
  • Patent number: 5130849
    Abstract: Enhanced energy transfers are achieved between optical beams by operating at wavelengths in the near-bandgap region of a photorefractive material, and employing an electrorefractive effect previously proposed only for single beams. An electric field is applied across a photorefractive medium of sufficient intensity to induce an electrorefractive coupling and consequent energy transfer between the beams. Gain enhancements are possible by orienting the photorefractive medium to obtain an electro-optic as well as an electrorefractive effect, and by a moving grating technique. The direction of energy transfer between the beams is controlled by the electric field direction, and can be reversed by reversing the field. Operation in the infrared region is made possible with semi-insulating materials. Applications include optical switches, amplifiers and phase conjugators.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: July 14, 1992
    Assignees: Hughes Aircraft Company, University of Southern California
    Inventors: George C. Valley, Marvin B. Klein, Afshin Partovi, Alan Kost, Elsa M. Garmire