Patents by Inventor Richard A. Lodwig
Richard A. Lodwig 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).
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Patent number: 8130136Abstract: The present invention is directed to a system and method for the identification of a target object in PCL radar applications. The disclosed embodiments describe the systems and methods used in the identification of a target object from the collection of data representing specific target object features, such as velocity, altitude, fuselage length, wing length, or wing sweepback angle, and the comparison of selected target object features with a database of known aircraft features. The present invention also provides for the calculation of feature dimensions, such as the fuselage length, wing length, or wing sweepback angle from measurements associated with a peak signal lobe as a function of a bistatic aspect angle.Type: GrantFiled: March 14, 2003Date of Patent: March 6, 2012Assignee: Lockheed Martin CorporationInventors: Richard A. Lodwig, Sandra Lodwig, legal representative, Richard Lodwig, legal representative, Bonnie L. Adams
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Publication number: 20110210885Abstract: The present invention is directed to a system and method for the identification of a target object in PCL radar applications. The disclosed embodiments describe the systems and methods used in the identification of a target object from the collection of data representing specific target object features, such as velocity, altitude, fuselage length, wing length, or wing sweepback angle, and the comparison of selected target object features with a database of known aircraft features. The present invention also provides for the calculation of feature dimensions, such as the fuselage length, wing length, or wing sweepback angle from measurements associated with a peak signal lobe as a function of a bistatic aspect angle.Type: ApplicationFiled: March 14, 2003Publication date: September 1, 2011Inventors: Richard A. Lodwig, Sandra Lodwig, Richard Lodwig, Bonnie L. Adams
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Patent number: 7012552Abstract: A civil aviation passive coherent location system and method is disclosed. A receiver subsystem receives reference transmissions from an uncontrolled transmitter. The receiver subsystem also receives scattered transmissions originating from the uncontrolled transmitter and scattered by an airborne object. The received transmissions are compared to determine measurement differentials, such a frequency-difference-of-arrival, a time-difference-of-arrival and an angle of arrival. From the measurement differentials, an object state estimate is determined. A previous state estimate may be updated with the determined state estimate. Processing subsystems determine the measurement differentials and state estimates.Type: GrantFiled: October 22, 2001Date of Patent: March 14, 2006Assignee: Lockheed Martin CorporationInventors: Kevin W. Baugh, Richard Lodwig, Robert Benner
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Patent number: 6995705Abstract: The present invention is directed to a system and method for Doppler track correlation for debris tracking in PCL radar applications. The disclosed embodiments describe the systems and methods used in the detection of debris pieces and the association of the Doppler signals from the debris pieces across multiple illumination channels. The present invention also provides computation of debris state vectors and the projection of trajectories to determine debris impact points.Type: GrantFiled: February 7, 2003Date of Patent: February 7, 2006Assignee: Lockheed Martin CorporationInventors: Bert L. Bradford, Sandra Lodwig, legal representative, Richard Lodwig, legal representative, Richard A. Lodwig, deceased
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Publication number: 20040075605Abstract: The present invention is directed to a system and method for Doppler track correlation for debris tracking in PCL radar applications. The disclosed embodiments describe the systems and methods used in the detection of debris pieces and the association of the Doppler signals from the debris pieces across multiple illumination channels. The present invention also provides computation of debris state vectors and the projection of trajectories to determine debris impact points.Type: ApplicationFiled: February 7, 2003Publication date: April 22, 2004Applicant: Lockheed Martin CorporationInventors: Bert L. Bradford, Richard A. Lodwig, Sandra Lodwig, Richard Lodwig
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Patent number: 6697012Abstract: A system and method for detecting and tracking a target object, including the calculation of the target object's altitude, is disclosed. During the processing of signals received by a receiver, the system selectively calculates the altitude of the target object from signals modified by an interference effect pattern formed by the signals broadcast by a transmitter, or from the calculation of geometric shapes associated with three or more transmitters and determining the intersection point of those shapes.Type: GrantFiled: May 6, 2002Date of Patent: February 24, 2004Assignee: Lockheed Martin CorporationInventors: Richard A. Lodwig, Bonnie L. Adams, Gregory A. Baker
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Patent number: 6522295Abstract: A system and method for enhancing object state awareness is disclosed. The system includes a receiver subsystem that receives reference signals from an uncontrolled transmitter and scattered transmissions originating from the uncontrolled transmitter and scattered by an object. The system also includes a front-end processing subsystem that determines a radial velocity of the object based on the received transmissions. The system also includes a back-end processing subsystem that determines object state estimates based on the determined radial velocity.Type: GrantFiled: April 24, 2001Date of Patent: February 18, 2003Assignee: Lockheed Martin Mission SystemsInventors: Kevin W. Baugh, Richard Lodwig, Robert Benner
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Publication number: 20030006930Abstract: A system and method for detecting and tracking a target object, including the calculation of the target object's altitude, is disclosed. During the processing of signals received by a receiver, the system selectively calculates the altitude of the target object from signals modified by an interference effect pattern formed by the signals broadcast by a transmitter, or from the calculation of geometric shapes associated with three or more transmitters and determining the intersection point of those shapes.Type: ApplicationFiled: May 6, 2002Publication date: January 9, 2003Applicant: Lockheed Martin Corp.Inventors: Richard A. Lodwig, Bonnie L. Adams, Gregory A. Baker
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Patent number: 6424290Abstract: The tracking of moving vehicles over long distances without emitting illumination signals is accomplished with a narrowband passive differential tracking system. Instead of Providing especially designed radar transmitters in a bistatic radar system, illuminators of opportunity (which may include UHF and VHF television station) are selected by their geographic locations so that they are in proximity to a moving target. The Doppler-shifted target reflected signals from the illuminators of opportunity are converted into digital data and combined with the independently derived initial target location and used to update the target's position and velocity by correlating the Doppler-shift with geographic coordinates. The correlation can be accomplished with a tracking algorithm which was designed for use in data processing of the signal processing system of the narrowband passive position tracking system.Type: GrantFiled: December 13, 1989Date of Patent: July 23, 2002Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Gary E. O'Neil, Richard A. Lodwig
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Publication number: 20020053982Abstract: A civil aviation passive coherent location system and method is disclosed. A receiver subsystem receives reference transmissions from an uncontrolled transmitter. The receiver subsystem also receives scattered transmissions originating from the uncontrolled transmitter and scattered by an airborne object. The received transmissions are compared to determine measurement differentials, such a frequency-difference-of-arrival, a time-difference-of-arrival and an angle of arrival. From the measurement differentials, an object state estimate is determined. A previous state estimate may be updated with the determined state estimate. Processing subsystems determine the measurement differentials and state estimates.Type: ApplicationFiled: October 22, 2001Publication date: May 9, 2002Applicant: Lockheed Martin Mission SystemsInventors: Kevin W. Baugh, Richard Lodwig, Robert Benner
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Publication number: 20020005803Abstract: A system and method for enhancing object state awareness is disclosed. The system includes a receiver subsystem that receives reference signals from an uncontrolled transmitter and scattered transmissions originating from the uncontrolled transmitter and scattered by an object. The system also includes a front-end processing subsystem that determines a radial velocity of the object based on the received transmissions. The system also includes a back-end processing subsystem that determines object state estimates based on the determined radial velocity.Type: ApplicationFiled: April 24, 2001Publication date: January 17, 2002Inventors: Kevin W. Baugh, Richard Lodwig, Robert Benner
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Patent number: 6137439Abstract: In a continuous wave Doppler system in which a fixed transmitter transmits a continuous wave signal to be reflected by moving targets and by fixed structure, an aircraft receives the reflective signals at two spaced apart antennas. The signals reflected from moving targets are distinguished from ground clutter reflected from fixed structure by the phase difference between the Doppler signals receive by the two antennas. The signals reflected from moving targets are distinguished from the ground clutter in response to the phase difference between the Doppler signals received by the two antennas being not equal to a phase difference value determined to be the phase difference for clutter signals. The phase difference value for clutter signals is determined from a function expressing the phase difference value as a linear variation with the Doppler frequency of the signals.Type: GrantFiled: September 8, 1998Date of Patent: October 24, 2000Assignee: Lockheed Martin CorporationInventors: Bert L. Bradford, Richard A. Lodwig
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Patent number: 5912640Abstract: An estimate of the time of the boost engine cut-off of a missile is provided by irradiating the missile after it is launched with continuous wave signals. The reflected continuous wave signals are detected and an inflection in the Doppler measurements of the reflected continuous wave signals provide an initial estimate of the boost engine cut-off time. A Kalman filter is used to provide initial estimates of the position and velocity of the missile at the boost engine cut-off time and a square root information filter responding to the Doppler measurement residuals after boost engine cut-off reduces the error in the initial estimate of the boost engine cut-off time to a minimum.Type: GrantFiled: November 18, 1997Date of Patent: June 15, 1999Assignee: Lockheed Martin CorporationInventors: Bert L. Bradford, Richard A. Lodwig