Patents by Inventor David Petreye

David Petreye 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).

  • Communication device having antenna switch diversity, and method therefor
    Patent number: 5692019
    Abstract: A communication device (400) with a polarization diversity antenna configuration, having a first antenna (410) with a first plane of polarization and a second antenna (412) with a second plane of polarization. Signal strength of a demodulated signal when the antenna switch (420) is coupled to one of the antennas (410, 412) is measured by a signal strength measuring circuit (440) to generate a short-term average signal power (SA) representing signal strength over a first predetermined number of symbol periods, a medium-term average signal power (MA) representing signal strength over a second predetermined number of symbol periods, and a long-term average signal power (LA) representing signal strength over a third predetermined number of symbol periods, greater than the second predetermined number of symbol periods and first predetermined number of symbol periods. Switching between antennas (410, 412) is made in response to differences between SA, MA and LA.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: November 25, 1997
    Assignee: Motorola, Inc.
    Inventors: Chun-Ye Susan Chang, Jian-Cheng Huang, Lu Chang, Lorenzo Ponce De Leon, David Petreye, James Michael Keba, Clinton C. Powell, II