Patents by Inventor Roy Stehlik

Roy Stehlik 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).

  • Mobile terminal apparatus and method for a satellite communication system
    Patent number: 5742639
    Abstract: A mobile terminal apparatus for satellite communication of voice data, facsimile and computer information, which consists of an RF transceiver section, an optional cellular board, and a processor board. The processor board has two digital signal processors and a multi-task control processor for controlling the operation of the signal processor.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: April 21, 1998
    Assignee: Westinghouse Electric Corporation
    Inventors: Albert J. Fasulo, II, Denise M. Cammarata, Keith W. Janson, Samuel S. Anderson, Raymond R. Cooper, Roy Stehlik
  • Digital quadriphase-shift keying modulator
    Patent number: 5523726
    Abstract: A digital quadriphase-shift keying modulator is described which generates a modulated intermediate carrier frequency (IF) based on a desired number of samples for each input information bit. The design includes a ROM (or RAM) look-up table which stores digitized waveforms. The inphase and quadrature components of a complex baseband signal are translated to an IF at a multiple of the sampling rate simply by alternating the inphase and quadrature samples and alternating signs. The real IF output is produced by summing the inphase and quadrature signals.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: June 4, 1996
    Assignee: Westinghouse Electric Corporation
    Inventors: Brian W. Kroeger, Roy Stehlik