Patents by Inventor Gottfried Ungerboeck

Gottfried Ungerboeck 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 arrangement for coding binary signals and modulating a carrier signal
    Patent number: 4077021
    Abstract: A method and structure for converting a sequence of binary digits into a sequence of discrete signal values, e.g., phase values, of a modulated carrier signal for data transmission. By introducing additional redundant signal values and coding information in a state-dependent sequential manner, enlarged minimum Euclidian distance between possible signal value sequences is achieved which results in a reduced error probability when maximum-likelihood decoding is applied in the receiver.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: February 28, 1978
    Assignee: International Business Machines Corporation
    Inventors: Istvan Peter Csajka, Gottfried Ungerboeck