Patents by Inventor Chan E. Li

Chan E. Li 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).

  • Echo canceller with relative feedback control
    Patent number: 4845746
    Abstract: A method for selecting feedback constants for two echo cancellers in an adaptive 2-wire to 2-wire repeater. The repeater is connected to two networks and when signals are received from both networks, the signal having the greater energy level is identified. A feedback constant of the echo canceller associated with the greater signal is set independent of the feedback constant of the other echo canceller. The feedback constant of the other echo canceller is set as a function of a ratio of the signal energy level of a lesser of to larger of the two signals received from the networks.
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: July 4, 1989
    Assignee: Rockwell International Corporation
    Inventor: Chan E. Li