Patents by Inventor Joseph D. Spencer

Joseph D. Spencer 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).

  • Multi-band direct sampling transmitter
    Patent number: 9014312
    Abstract: A radio signal transmission technique includes selecting a sample rate from a plurality of predefined sample rates so that the radio signal is contained entirely within a Nyquist zone corresponding to the sample rate. A digitized signal is converted to an analog signal, spectrally enhanced, and passed through a selected one of a plurality of selectable bandpass filters to form the radio signal.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: April 21, 2015
    Assignee: L-3 Communications, Corp.
    Inventors: Osama S. Haddadin, Francis J. Smith, Joseph D. Spencer, Rebekah Reeder
  • Multi-band direct sampling receiver
    Patent number: 8953715
    Abstract: A radio signal reception technique includes selecting a sample rate from a plurality of predefined sample rates so that the radio signal is contained entirely within a Nyquist zone corresponding to the sample rate. The radio signal is passed through a selected one of a plurality of selectable bandpass filters to provide an analog signal. The analog signal is sampled at the sample rate and converted to a digital signal.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: February 10, 2015
    Assignee: L-3 Communications Corp.
    Inventors: Osama S. Haddadin, Joseph D. Spencer, Rebekah Reeder, Robert G. Rebolledo