Patents by Inventor Ralph Hunt

Ralph Hunt 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).

  • Sub-filtering finite impulse response (FIR) filter for frequency search capability
    Patent number: 8615538
    Abstract: The present invention is directed to sub-filtering FIR (frequency impulse response) to provide the capabilities of an ambiguity function (i.e., search for a signal in time and frequency) without extensive computations. By minimizing the resources used for the signal search (increased efficiency), the size of the implementation of the ambiguity function in hardware, and thus its power consumption, can be reduced. Additionally, by making the frequency search more efficient, larger scale frequency searches are possible.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: December 24, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Gregory Fleizach, Ralph Hunt
  • No-multiply finite impulse response (FIR) filter using phase additions
    Patent number: 8370413
    Abstract: The present invention is directed toward a Finite Impulse Response (FIR) no-multiply filter (NMF), which replaces complex multiplications with phase additions. At each tap in the FIR filter, only phases are accumulated and at the output the complex result is reconstructed in I/Q. Noise dither is relied upon to smooth the digitized phase resolution. The NMF is ideally suited to a matched filtering scenario for constant modulus signals.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: February 5, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Gregory Fleizach, Ralph Hunt, Michael Anderson