Patents by Inventor Daniel MacFarlane Shearer

Daniel MacFarlane Shearer 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).

  • Publication number: 20060140308
    Abstract: A carrier tracking circuit includes a first phase adjustment circuit coupled to an input of a delay element and a second phase adjustment circuit coupled to an output of the delay element. A phase correction circuit is coupled to output of the delay element is operable to generate a phase adjustment value based upon a data symbol output from the delay element. The phase correction circuit includes a double phase correction circuit to prevent double application of the same phase adjustment value to a symbol by both the first and second phase adjustment circuits. The carrier tracking circuit may be used in OFDM communications systems with each data symbol being an OFDM symbol and with the delay element being an FFT. The carrier tracker circuit also may include a feed forward circuit for correcting the phase error of a given data symbol using a phase error generated from that symbol.
    Type: Application
    Filed: February 23, 2004
    Publication date: June 29, 2006
    Inventors: Daniel MacFarlane Shearer, Michael Seals