Patents by Inventor Bevan M. Baas

Bevan M. Baas 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: 8494568
    Abstract: Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: July 23, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Paul J. Husted, Bevan M. Baas
  • Patent number: 8346288
    Abstract: Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: January 1, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Paul J. Husted, Bevan M. Baas
  • Publication number: 20110294528
    Abstract: Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off.
    Type: Application
    Filed: August 10, 2011
    Publication date: December 1, 2011
    Applicant: Qualcomm Atheros, Inc
    Inventors: Paul J. Husted, Bevan M. Baas
  • Patent number: 8019369
    Abstract: Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: September 13, 2011
    Assignee: Qualcomm Atheros, Inc.
    Inventors: Paul J. Husted, Bevan M. Baas
  • Publication number: 20100222092
    Abstract: Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off.
    Type: Application
    Filed: May 12, 2010
    Publication date: September 2, 2010
    Inventors: Paul J. Husted, Bevan M. Baas
  • Patent number: 7742778
    Abstract: Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: June 22, 2010
    Assignee: Atheros Communications, Inc.
    Inventors: Paul J. Husted, Bevan M. Baas
  • Patent number: 7340265
    Abstract: Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: March 4, 2008
    Assignee: Atheros Communications, Inc.
    Inventors: Paul J. Husted, Bevan M. Baas
  • Patent number: 7113559
    Abstract: A circular filtering system that prevents the problem of inter-symbol interference. The circular filtering system utilizes a buffer memory to store samples of a given symbol and provide only these samples to a linear filter such that the output of the filter, for any given symbol is formed by filtering only samples of that input symbol. Each symbol being filtered independent of other symbols hence eliminating inter-symbol interference caused by filtering. Where symbols are tolerant to a fixed phase shift for each symbol, the circular filtering system can be simplified by reducing the size of the buffer and introducing a multiplexer.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: September 26, 2006
    Assignee: Atheros Communications, Inc.
    Inventors: Bevan M. Baas, Jeffrey M. Gilbert, William J. McFarland, Teresa H. Meng, Ardavan Maleki Tehrani
  • Publication number: 20030161487
    Abstract: Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off.
    Type: Application
    Filed: May 3, 2002
    Publication date: August 28, 2003
    Inventors: Paul J. Husted, Bevan M. Baas
  • Publication number: 20030058975
    Abstract: A circular filtering system which prevents the problem of inter-symbol interference. The circular filtering system utilizes a buffer memory to store samples of a given symbol and provide only these samples to a linear filter such that the output of the filter, for any given symbol is formed by filtering only samples of that input symbol. Each symbol is filtered independent of other symbols hence eliminating inter-symbol interference caused by filtering. Where symbols are tolerant to a fixed phase shift for each symbol, the circular filtering system can be simplified by reducing the size of the buffer and introducing a multiplexer.
    Type: Application
    Filed: September 24, 2001
    Publication date: March 27, 2003
    Inventors: Bevan M. Baas, Jeffrey M. Gilbert, William J. McFarland, Teresa H. Meng, Ardavan Maleki Tehrani