Patents by Inventor Ferial T. El-Mokadem

Ferial T. El-Mokadem 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).

  • Double talk and line noise detector for a echo canceller
    Patent number: 4645883
    Abstract: An echo canceller comprising an adaptive finite impulse response filter receiving a receive signal and having its output subtracted from a send signal, a non-linear device for attenuating low level signals of the send signal and a noise injector for injecting noise into the send signal proportional to a dynamically measured background noise in the subtracted output. The non-linear device and the noise injector are disabled when the receive signal is below expected noise level or the send signal is at a high level relative to the receive signal.
    Type: Grant
    Filed: May 9, 1984
    Date of Patent: February 24, 1987
    Assignee: Communications Satellite Corporation
    Inventors: Otakar A. Horna, Edwin A. Stennett, Ferial T. El-Mokadem