Patents by Inventor Ronald E. Krebs

Ronald E. Krebs 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 of testing and simulating communication equipment over multiple transmission channels
    Patent number: 6618696
    Abstract: The present invention is a method of simulating the effects of a plurality of channels on a signal that includes the steps of acquiring a state transition matrix for each of said plurality of channels; acquiring an error matrix for each of said plurality of channels; selecting the first channel to be simulated; assuming that the signal is in a particular state; receiving the signal; generating a first number; determining the state to which the signal transitions; transitioning the signal to the state determined in the last step; generating a second number; determining what errors, if any, to inject into the signal by comparing the second number to entries in the column of the error matrix of the corresponding channel that matches the state of the signal; if one of the errors determined in the last step is lost signal then discarding the signal, not injecting any other error into the signal, selecting another channel if the user desires, assuming that the next signal selected is in the same state to which the
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: September 9, 2003
    Assignee: The United States of America as represented by the National Security Agency
    Inventors: Richard A. Dean, Steven William Roberts, Mark George Jacobs, Ronald E. Krebs