Patents by Inventor Jonathan Hghton Stott

Jonathan Hghton Stott 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).

  • Patent number: 6320915
    Abstract: Improved synchronization of OFDM signals is achieved. A controlled oscillator (8) provides clock pulses to derive complex samples of an input signal which are applied both to a fast Fourier transform (5) for data recovery and to a synchronization unit (9). The synchronization unit generates the complex product XY* of the input and the delayed input, which is applied to a high-pass filter (30) to suppress frequencies below the symbol frequency. The filter output is applied through a symbol comb filter (40) to an adaptive slicer (50) which determines the larger magnitude of the real and imaginary components of the signal. A pulse processor (60) generates a single pulse at the leading edge of the symbol pulse which is applied to a symbol counter (70). The symbol counter includes two count stages arranged to lock in quickly and yet be variable to accomodate different guard intervals in the OFDM signal.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: November 20, 2001
    Inventors: Jonathan Hghton Stott, Adrian Paul Robinson, Christopher Keith Perry Clark