Patents by Inventor Mark A. Barnes

Mark A. Barnes 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: 8111797
    Abstract: The present invention is an improved system and method for detecting the leading edge of a waveform. More specifically, the invention relates to detecting the leading edge of an ultra wideband waveform. The invention requires locking to the ultra wideband waveform at a lock reference time, and sampling the ultra wideband waveform during one or more time windows relative to the lock reference time to identify one or more leading edge candidate times based on one or more detection criterion. The ultra wideband signal is sampled at a band limited Nyquist rate that avoids aliasing within a band of interest of the ultra wideband waveform, but allows aliasing outside of the band of interest to minimize the number of samples for leading edge detection processing.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: February 7, 2012
    Assignee: TDC Acquisition Holdings, Inc.
    Inventors: Mark A. Barnes, Irina Dodoukh
  • Publication number: 20100054304
    Abstract: The present invention is an improved system and method for detecting the leading edge of a waveform. More specifically, the invention relates to detecting the leading edge of an ultra wideband waveform. The invention requires locking to the ultra wideband waveform at a lock reference time, and sampling the ultra wideband waveform during one or more time windows relative to the lock reference time to identify one or more leading edge candidate times based on one or more detection criterion. The ultra wideband signal is sampled at a band limited Nyquist rate that avoids aliasing within a band of interest of the ultra wideband waveform, but allows aliasing outside of the band of interest to minimize the number of samples for leading edge detection processing.
    Type: Application
    Filed: May 8, 2008
    Publication date: March 4, 2010
    Applicant: Time Domain Corporation
    Inventors: Mark A. Barnes, Irina Dodoukh
  • Patent number: 6922177
    Abstract: An antenna array comprising a ground plane and a plurality of elements mounted thereon, said elements being capable of emitting and receiving ultra wideband emissions. Elements are arrayed on the ground plane in two parallel rows, a transmitting row, and a receiving row, such that a given element in the receiving row is aligned in at least one direction with a corresponding element in the transmitting row. Additionally, the elements are configured on the ground plane to elicit a symmetrical product response in the azimuthal plane, and to produce horizontally polarized signals. An alternative embodiment places the elements with unique inter-element spacing within the rows. An embodiment comprises a fence structure between rows. A method for use comprises the step of transmitting a signal via an element in the transmitting row and receiving said signal through an element in the receiving row, not aligned with the transmitting element.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: July 26, 2005
    Assignee: Time Domain Corporation
    Inventors: Mark A. Barnes, Charles G. Gilbert, Herbert U. Fluhler, Hans G. Schantz, Soumya K. Nag, David M. Dickson
  • Patent number: 6823022
    Abstract: A method for mitigating interference in impulse radio communication conveying a message from a transmitting station to a receiving station. The method comprises the steps of: (a) conveying the message in packets; (b) repeating conveyance of selected packets to make up a repeat package; and (c) conveying the repeat package a plurality of times at a repeat period greater than twice the occurrence period of the interference. The communication may convey a message from a proximate transmitter to a distal receiver, and receive a message by a proximate receiver from a distal transmitter.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: November 23, 2004
    Assignee: Time Domain Corp.
    Inventors: Larry W. Fullerton, James L. Richards, Vernon R. Brethour, Mark D. Roberts, Mark A. Barnes, Ivan A. Cowie, Donald D. Mondul
  • Patent number: 6667724
    Abstract: An antenna array comprising a ground plane and a plurality of elements mounted thereon, said elements being capable of emitting and receiving ultra wideband emissions. Elements are arrayed on the ground plane in two parallel rows, a transmitting row, and a receiving row, such that a given element in the receiving row is aligned in at least one direction with a corresponding element in the transmitting row. Additionally, the elements are configured on the ground plane to elicit a symmetrical product response in the azimuthal plane, and to produce horizontally polarized signals. An alternative embodiment places the elements with unique inter-element spacing within the rows. An embodiment comprises a fence structure between rows. A method for use comprises the step of transmitting a signal via an element in the transmitting row and receiving said signal through an element in the receiving row, not aligned with the transmitting element.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: December 23, 2003
    Assignee: Time Domain Corporation
    Inventors: Mark A. Barnes, Charles G. Gilbert, Herbert U. Fluhler, Hans G. Schantz, Soumya K. Nag, David M. Dickson
  • Patent number: 6606051
    Abstract: A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, for example, a reverse bicone antenna or a pulse-responsive dipole antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal and thereafter are successively short time and long time integrated to achieve detection.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: August 12, 2003
    Assignee: Time Domain Corporation
    Inventors: Larry W. Fullerton, Mark A. Barnes
  • Patent number: 6552677
    Abstract: A method of detecting objects reflecting impulse waveforms of generating a detection envelope by receiving a reflected waveform, delaying said waveform by a peak-to-zero delay (PZD) interval. The PZD interval is the time between a maximum energy displacement in the impulse waveform and an adjacent zero crossing. The reflected waveform and its delayed version are squared and then summed to create the envelope. If the envelope is to be defined in terms of voltage, the root of the sum of the squares may be found. Also a method for generating an image using the PZD interval in back-projection techniques is described wherein a sampling point is chosen on each of a plurality of reflected waveforms. The values of the samples are summed and the waveforms are delayed by the PZD interval and the values of the sampling points are again summed. The two sums are squared and added together to generate an image envelope.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: April 22, 2003
    Assignee: Time Domain Corporation
    Inventors: Mark A. Barnes, Soumya K. Nag, Herbert U. Fluhler
  • Publication number: 20030016157
    Abstract: A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C., replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 23, 2003
    Inventors: Larry W. Fullerton, Mark A. Barnes
  • Publication number: 20020190915
    Abstract: An antenna array comprising a ground plane and a plurality of elements mounted thereon, said elements being capable of emitting and receiving ultra wideband emissions. Elements are arrayed on the ground plane in two parallel rows, a transmitting row, and a receiving row, such that a given element in the receiving row is aligned in at least one direction with a corresponding element in the transmitting row. Additionally, the elements are configured on the ground plane to elicit a symmetrical product response in the azimuthal plane, and to produce horizontally polarized signals. An alternative embodiment places the elements with unique interelement spacing within the rows. An embodiment comprises a fence structure between rows. A method for use comprises the step of transmitting a signal via an element in the transmitting row and receiving said signal through an element in the receiving row, not aligned with the transmitting element.
    Type: Application
    Filed: February 26, 2002
    Publication date: December 19, 2002
    Inventors: Mark A. Barnes, Charles G. Gilbert, Herbert U. Fluhler, Hans G. Schantz, Soumya K. Nag, David M. Dickson
  • Publication number: 20020175850
    Abstract: A method of detecting objects reflecting impulse waveforms of generating a detection envelope by receiving a reflected waveform, delaying said waveform by a peak-to-zero delay (PZD) interval. The PZD interval is the time between a maximum energy displacement in the impulse waveform and an adjacent zero crossing. The reflected waveform and its delayed version are squared and then summed to create the envelope. If the envelope is to be defined in terms of voltage, the root of the sum of the squares may be found. Also a method for generating an image using the PZD interval in back-projection techniques is described wherein a sampling point is chosen on each of a plurality of reflected waveforms. The values of the samples are summed and the waveforms are delayed by the PZD interval and the values of the sampling points are again summed. The two sums are squared and added together to generate an image envelope.
    Type: Application
    Filed: February 26, 2002
    Publication date: November 28, 2002
    Inventors: Mark A. Barnes, Soumya K. Nag, Herbert U. Fluhler
  • Publication number: 20020145570
    Abstract: An antenna array comprising a ground plane and a plurality of elements mounted thereon, said elements being capable of emitting and receiving ultra wideband emissions. Elements are arrayed on the ground plane in two parallel rows, a transmitting row, and a receiving row, such that a given element in the receiving row is aligned in at least one direction with a corresponding element in the transmitting row. Additionally, the elements are configured on the ground plane to elicit a symmetrical product response in the azimuthal plane, and to produce horizontally polarized signals. An alternative embodiment places the elements with unique inter-element spacing within the rows. An embodiment comprises a fence structure between rows. A method for use comprises the step of transmitting a signal via an element in the transmitting row and receiving said signal through an element in the receiving row, not aligned with the transmitting element.
    Type: Application
    Filed: November 30, 2001
    Publication date: October 10, 2002
    Inventors: Mark A. Barnes, Charles G. Gilbert, Herbert U. Fluhler, Hans G. Schantz, Soumya K. Nag, David M. Dickson
  • Patent number: 6218979
    Abstract: A system and method for high resolution radar imaging using a sparse array of time modulated ultra wideband (TM-UWB) radars. Two or more TM-UWB radars are arranged in a sparse array. Each TM-UWB radar transmits ultra wideband pulses that illuminate a target, and at least one receives the signal returns. The signal return data is processed according to the function being performed, such as imaging or motion detection. The TM-UWB radar array operates in several modes. In a first mode, each TM-UWB radar transmits and receives back scattering returns, and at least one TM-UWB radar receives forward scattering returns. In a second mode, each TM-UWB radar transmits but only one of the radars receives signal returns, both back and forward scattering. In a third mode, each TM-UWB radar transmits and receives back scattering signal returns, but neither receives forward scattering returns.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: April 17, 2001
    Assignee: Time Domain Corporation
    Inventors: Mark A. Barnes, Larry W. Fullerton
  • Patent number: 5969663
    Abstract: A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: October 19, 1999
    Assignee: Time Domain Corporation
    Inventors: Larry W. Fullerton, Mark A. Barnes
  • Patent number: 5764696
    Abstract: Chiral and dual polarization techniques for an ultra-wide band communication system provide an ultra-wide band signal having signal components in two dimensions. The polarization techniques utilize two signal paths to excite a pair of linear, orthogonal antennas. The pulses transmitted along one signal path are delayed with respect to the pulses transmitted along the second signal path such that one antenna is excited with a pulse that is out of phase with respect to the pulse that is exciting the other antenna. With chiral polarization, one signal is delayed in time by an amount such that it reaches a maximum when the other signal is at an adjacent minimum. With dual polarization, one signal is delayed by more than a pulse width. Because the signal is split and transmitted using two orthogonal, linear antennas, the transmitted signal has an electric field component in two dimensions.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: June 9, 1998
    Assignee: Time Domain Corporation
    Inventors: Mark A. Barnes, Larry W. Fullerton