Patents by Inventor Martin J. O'Flaherty

Martin J. O'Flaherty 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).

  • Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers
    Patent number: 6703897
    Abstract: A significant part of the cost of a base station in the cellular mobile radio system is the power amplifier. Thus it is desirable to maximise usage of a power amplifier and in particular to gain the best power output from the amplifier or to improve its efficiency. Such power amplifiers, however, must operate within strict spectral boundaries and thus power amplifiers are typically over-specified in order to ensure that the spectral requirements are met. By measuring the output of the amplifier and determining distortion factors and then adaptively adjusting the operating characteristics of the amplifier, the degree of over-specification of the amplifier required may be reduced with consequent cost and environmental savings.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: March 9, 2004
    Assignee: Nortel Networks Limited
    Inventors: Martin J. O'Flaherty, Roman N. Nemish, David M. Tholl, Gordon B. Neilson, Charles E. Norman
  • Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers
    Publication number: 20030117215
    Abstract: A significant part of the cost of a base station in the cellular mobile radio system is the power amplifier. Thus it is desirable to maximise usage of a power amplifier and in particular to gain the best power output from the amplifier or to improve its efficiency. Such power amplifiers, however, must operate within strict spectral boundaries and thus power amplifiers are typically over-specified in order to ensure that the spectral requirements are met. By measuring the output of the amplifier and determining distortion factors and then adaptively adjusting the operating characteristics of the amplifier, the degree of over-specification of the amplifier required may be reduced with consequent cost and environmental savings.
    Type: Application
    Filed: December 26, 2001
    Publication date: June 26, 2003
    Inventors: Martin J. O'Flaherty, Roman N. Nemish, David M. Tholl, Gordon B. Neilson, Charles E. Norman