Patents by Inventor Iwan D. Jemczyk

Iwan D. Jemczyk 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 communicating stuffing indications in a multi-level communications system
    Patent number: 5036526
    Abstract: In a QAM radio transmission system, stuffing indications for a transmitted stuffed data signal are transmitted only once rather than repeatedly. The two possible states of each stuffing indication are represented by respective sets of signal points in the signal point constellation, with a separation between any two signal points in the different sets which is at least three times the signal point separation of the system. The reliability with which the stuffing indications are sent is much greater than for other transmitted information.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: July 30, 1991
    Assignee: Northern Telecom Limited
    Inventors: John D. McNicol, Iwan D. Jemczyk