Patents by Inventor EFTHIMIOS E. TSAKONAS

EFTHIMIOS E. TSAKONAS 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).

  • Method and apparatus for tracking a frequency-hopped signal
    Patent number: 8599901
    Abstract: A frequency hopping signal receiving system comprising: a receiver for extracting discrete-time samples from the signal; a memory connected to the receiver for storing the extracted discrete-time samples from the signal; at least one processor operatively connected to the memory for: determining a state-space vector that captures relevant information to describe the dynamics of the signal; selecting a parameter to represent the probability of hopping associated with the signal; generating particle filters to estimate unknown parameters in the state-space vector based upon the extracted discrete-time samples by generating random particles that approximate the filtering distribution having importance weights; specifying the importance function in closed-form in a convenient mixture representation, which enables drawing particles and updating the importance weights; constructing an estimator to generate hop particles based upon observing at least one sample hop and then evaluating the estimator using a condition
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: December 3, 2013
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Efthimios E. Tsakonas, Nikolaos D. Sidiropoulos, Ananthram Swami
  • METHOD AND APPARATUS FOR TRACKING A FREQUENCY-HOPPED SIGNAL
    Publication number: 20110243192
    Abstract: A frequency hopping signal receiving system comprising: a receiver for extracting discrete-time samples from the signal; a memory connected to the receiver for storing the extracted discrete-time samples from the signal; at least one processor operatively connected to the memory for: determining a state-space vector that captures relevant information to describe the dynamics of the signal; selecting a parameter to represent the probability of hopping associated with the signal; generating particle filters to estimate unknown parameters in the state-space vector based upon the extracted discrete-time samples by generating random particles that approximate the filtering distribution having importance weights; specifying the importance function in closed-form in a convenient mixture representation, which enables drawing particles and updating the importance weights; constructing an estimator to generate hop particles based upon observing at least one sample hop and then evaluating the estimator using a condition
    Type: Application
    Filed: April 5, 2010
    Publication date: October 6, 2011
    Applicant: U.S. Government as represented by the Secretary of the Army
    Inventors: EFTHIMIOS E. TSAKONAS, NIKOLAOS D. SIDIROPOULOS