Patents by Inventor Larry Thomson

Larry Thomson 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).

  • System and method for protecting against denial of service attacks
    Patent number: 7861298
    Abstract: A system and method is disclosed for protecting a receiver configured to receive a plurality of contemporaneous spread spectrum signal bursts from a denial of service attack. The method includes the operation of detecting a burst transmission that includes a random burst number. The burst transmission can be analyzed to determine a denial of service statistic based on the random burst number. The burst transmission is processed when the denial of service statistic is within a predetermined threshold.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: December 28, 2010
    Assignee: L-3 Communications, Corp.
    Inventors: Thomas R. Giallorenzi, Johnny M. Harris, Sam Kingston, Robert A. Wright, Larry Thomson
  • Direct digital conversion of baseband signals to super-nyquist frequencies
    Patent number: 6703954
    Abstract: Method and apparatus for shifting of a lowpass signal to a higher frequency and for precompensating distortion caused by a digital to analog converter (DAC). Higher frequency signals are generated by filtering the output of the DAC so that at least one of the replicas generated by the DAC is the signal of interest. In this manner, the higher frequency signals for wireless transmitters, or for other applications, may be generated more easily. Moreover, compensation for distortion caused by the DAC is performed by a precompensator which modifies for distortion, not at the baseband signal, but at a passband frequency.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: March 9, 2004
    Assignee: 3Com Corporation
    Inventors: Carl H. Alelyunas, Cotter W. Sayre, Larry Thomson
  • Direct digital conversion of baseband signals to super-nyquist frequencies
    Publication number: 20030095060
    Abstract: Method and apparatus for shifting of a lowpass signal to a higher frequency and for precompensating distortion caused by a digital to analog converter (DAC). Higher frequency signals are generated by filtering the output of the DAC so that at least one of the replicas generated by the DAC is the signal of interest. In this manner, the higher frequency signals for wireless transmitters, or for other applications, may be generated more easily. Moreover, compensation for distortion caused by the DAC is performed by a precompensator which modifies for distortion, not at the baseband signal, but at a passband frequency.
    Type: Application
    Filed: December 20, 2002
    Publication date: May 22, 2003
    Inventors: Carl H. Alelyunas, Cotter W. Sayre, Larry Thomson
  • Direct digital conversion of baseband signals to super-nyquist frequencies
    Patent number: 6507303
    Abstract: Method and apparatus for shifting of a lowpass signal to a higher frequency and for precompensating distortion caused by a digital to analog converter (DAC). Higher frequency signals are generated by filtering the output of the DAC so that at least one of the replicas generated by the DAC is the signal of interest. In this manner, the higher frequency signals for wireless transmitters, or for other applications, may be generated more easily. Moreover, compensation for distortion caused by the DAC is performed by a precompensator which modifies for distortion, not at the baseband signal, but at a passband frequency.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: January 14, 2003
    Inventors: Carl H. Alelyunas, Cotter W. Sayre, Larry Thomson