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).
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Patent number: 8111797Abstract: 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: GrantFiled: May 8, 2008Date of Patent: February 7, 2012Assignee: TDC Acquisition Holdings, Inc.Inventors: Mark A. Barnes, Irina Dodoukh
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Publication number: 20100054304Abstract: 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: ApplicationFiled: May 8, 2008Publication date: March 4, 2010Applicant: Time Domain CorporationInventors: Mark A. Barnes, Irina Dodoukh
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Patent number: 6922177Abstract: 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: GrantFiled: February 26, 2002Date of Patent: July 26, 2005Assignee: Time Domain CorporationInventors: Mark A. Barnes, Charles G. Gilbert, Herbert U. Fluhler, Hans G. Schantz, Soumya K. Nag, David M. Dickson
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Patent number: 6823022Abstract: 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: GrantFiled: June 2, 2000Date of Patent: November 23, 2004Assignee: 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
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Patent number: 6667724Abstract: 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: GrantFiled: November 30, 2001Date of Patent: December 23, 2003Assignee: Time Domain CorporationInventors: Mark A. Barnes, Charles G. Gilbert, Herbert U. Fluhler, Hans G. Schantz, Soumya K. Nag, David M. Dickson
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Patent number: 6606051Abstract: 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: GrantFiled: October 18, 1999Date of Patent: August 12, 2003Assignee: Time Domain CorporationInventors: Larry W. Fullerton, Mark A. Barnes
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Patent number: 6552677Abstract: 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: GrantFiled: February 26, 2002Date of Patent: April 22, 2003Assignee: Time Domain CorporationInventors: Mark A. Barnes, Soumya K. Nag, Herbert U. Fluhler
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Publication number: 20030016157Abstract: 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: ApplicationFiled: June 28, 2002Publication date: January 23, 2003Inventors: Larry W. Fullerton, Mark A. Barnes
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Publication number: 20020190915Abstract: 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: ApplicationFiled: February 26, 2002Publication date: December 19, 2002Inventors: Mark A. Barnes, Charles G. Gilbert, Herbert U. Fluhler, Hans G. Schantz, Soumya K. Nag, David M. Dickson
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Publication number: 20020175850Abstract: 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: ApplicationFiled: February 26, 2002Publication date: November 28, 2002Inventors: Mark A. Barnes, Soumya K. Nag, Herbert U. Fluhler
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Publication number: 20020145570Abstract: 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: ApplicationFiled: November 30, 2001Publication date: October 10, 2002Inventors: Mark A. Barnes, Charles G. Gilbert, Herbert U. Fluhler, Hans G. Schantz, Soumya K. Nag, David M. Dickson
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Patent number: 6218979Abstract: 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: GrantFiled: June 14, 1999Date of Patent: April 17, 2001Assignee: Time Domain CorporationInventors: Mark A. Barnes, Larry W. Fullerton
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Patent number: 5969663Abstract: 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: GrantFiled: November 25, 1997Date of Patent: October 19, 1999Assignee: Time Domain CorporationInventors: Larry W. Fullerton, Mark A. Barnes
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Patent number: 5764696Abstract: 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: GrantFiled: June 2, 1995Date of Patent: June 9, 1998Assignee: Time Domain CorporationInventors: Mark A. Barnes, Larry W. Fullerton