Patents by Inventor Richard Andrew Zadrejko

Richard Andrew Zadrejko 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 apparatus for controlling peak factor of coherent frequency-division-multiplexed systems
    Patent number: 5970053
    Abstract: A system is disclosed which can measure and control the absolute phase angles of individual coherent Frequency-Division-Multiplexed (FDM) carriers which have been combined to form a composite signal. User-specified phase relationships for the carriers are predetermined to produce an optimum peak factor (peak power to average power ratio) of the composite signal for a given application. In the preferred embodiment, phase relationships chosen to minimize peak factor can dramatically reduce the presence of intermodulation distortion products which can be detrimental to present communication architectures, such as Community Antenna Television (CATV).
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: October 19, 1999
    Assignee: RDL, Inc.
    Inventors: Darryl Richard Schick, Mark Anthony Zlotnik, Edward James McQuillen, Jr., Richard Andrew Zadrejko