Patents by Inventor Joseph Peter McGeehan

Joseph Peter McGeehan 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).

  • Full-duplex radio transmitter/receiver
    Patent number: 6229992
    Abstract: A full-duplex radio transceiver, in which cancellation of transmission signals in the receive path is achieved by sampling the transmission signals, and controllably adjusting the gain and phase of the sampled signal, before subtracting the adjusted signal from the received signals in order to minimise the component of the transmission signals appearing in the received signals. Processing is done in a DSP at or near baseband.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: May 8, 2001
    Assignee: University of Bristol
    Inventors: Joseph Peter McGeehan, Andrew Bateman, Mark Anthony Beach, Peter Blakeborough Kenington, Wycliffe Timothy Slingsby
  • Image-reject mixers
    Patent number: 5950119
    Abstract: An image-reject mixer includes a process for adding a signal to a RF input signal. Any imbalance in the mixer circuitry, which would lead to imperfect image suppression, is corrected by detecting any resulting local oscillator component in the mixer output signal, and adjusting the balance to minimize the size of the local oscillator component.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: September 7, 1999
    Assignee: University of Bristol
    Inventors: Joseph Peter McGeehan, Mark Anthony Beach, Andrew Robert Nix, Peter Blakeborough Kenington