Patents by Inventor Tod M. Schuck

Tod M. Schuck 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: 10838057
    Abstract: A Doppler radar system includes a Doppler radar processor, a memory in communication with radar processor and a transmit/receive controller. The memory includes computer readable instructions that cause the Doppler radar processor to transmit a radar signal toward the airborne object at a frequency; receive reflected radar signals off of the airborne object, including frequencies produced as a result of Doppler effect due to relative motion between features of the airborne object and the radar system; and Fourier transform the received signals into the frequency domain. Peak frequencies and their harmonic frequency families are sorted and identified. The logarithm of the Fourier transform is calculated to generate a quefrency cepstrum. To identify features producing cyclic, periodic Doppler frequency patterns, peak quefrencies and rahmonic families associated with a quefrency peak are sorted and identified. The rotational state of the airborne object based on the identified quefrency families is determined.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: November 17, 2020
    Assignee: Lockheed Martin Corporation
    Inventors: Tod M. Schuck, David B. Reese, Mark A. Friesel
  • Publication number: 20180136326
    Abstract: A Doppler radar system includes a Doppler radar processor, a memory in communication with radar processor and a transmit/receive controller. The memory includes computer readable instructions that cause the Doppler radar processor to transmit a radar signal toward the airborne object at a frequency; receive reflected radar signals off of the airborne object, including frequencies produced as a result of Doppler effect due to relative motion between features of the airborne object and the radar system; and Fourier transform the received signals into the frequency domain. Peak frequencies and their harmonic frequency families are sorted and identified. The logarithm of the Fourier transform is calculated to generate a quefrency cepstrum. To identify features producing cyclic, periodic Doppler frequency patterns, peak quefrencies and rahmonic families associated with a quefrency peak are sorted and identified. The rotational state of the airborne object based on the identified quefrency families is determined.
    Type: Application
    Filed: October 16, 2017
    Publication date: May 17, 2018
    Inventors: Tod M. Schuck, David B. Reese, Mark A. Friesel
  • Publication number: 20180106889
    Abstract: A method for classifying an airborne object detected by a radar system is disclosed. The method includes the steps of identifying quefrency peaks in a quefrency cepstrum generated from a received radar return signal, the quefrency peaks indicative of a rotating physical feature of the airborne object. A rotational velocity of the physical feature is determined based on the quefrency peaks. The method further includes determining at least one parameter or characteristic of a physical feature of the airborne object. The at least one characteristic is compared to a known physical feature stored in a classifier database, wherein a classification decision is made upon identifying a match between the at least one characteristic and a known physical feature stored in the database.
    Type: Application
    Filed: October 16, 2017
    Publication date: April 19, 2018
    Inventors: Tod M. Schuck, David B. Reese, Mark A. Friesel
  • Patent number: 8924325
    Abstract: A system for evaluating the threat posed by sensed targets includes sources of predetermined threat hypotheses and doctrinal information, and a Choquet threat discernment processor to identify a threat level represented by each target. A threshold arrangement is coupled evaluates the threat level, and deems those threat levels above the threshold to be suitable for the taking of countermeasures.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: December 30, 2014
    Assignee: Lockheed Martin Corporation
    Inventor: Tod M. Schuck