Patents by Inventor Tapio Vuopala

Tapio Vuopala 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).

  • Method and arrangement for limiting signal in radio transmitter
    Patent number: 7340004
    Abstract: A method for limiting a signal in a radio transmitter comprises giving a signal a limiting threshold, taking at least two samples from the signal for obtaining sample values, adding one or more sample values between the obtained first and at least one subsequent sample values, searching for sample values exceeding the limiting threshold, and if at least one sample value exceeding the limiting threshold is found determining limiting coefficients for a predetermined number of sample values by means of the at least one sample value exceeding the limiting threshold, and limiting the signal by one or more determined coefficients.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: March 4, 2008
    Assignee: Nokia Corporation
    Inventors: Tapio Vuopala, Olli Piirainen
  • Method and arrangement for limiting signal in radio transmitter
    Publication number: 20040258175
    Abstract: A method for limiting a signal in a radio transmitter comprises giving (302) a signal a limiting threshold, taking (304) at least two samples from the signal for obtaining sample values, adding (306) one or more sample values between the obtained first and at least one subsequent sample values, searching (308) for sample values exceeding the limiting threshold, and if at least one sample value exceeding the limiting threshold is found determining (310) limiting coefficients or reducing coefficients for a predetermined number of sample values by means of the at least one sample value exceeding the limiting threshold, and limiting (312) the signal by one or more determined coefficients.
    Type: Application
    Filed: April 22, 2004
    Publication date: December 23, 2004
    Inventors: Tapio Vuopala, Olli Piirainen
  • Data transmission method and arrangement
    Publication number: 20030219079
    Abstract: A method for restricting a signal in a radio transmitter, which method comprises setting a threshold value and a value sample interval for the signal, searching the modulated signal for maximum values exceeding the threshold value, and determining the instant of occurrence of the maximum value that exceeded the threshold value, searching the modulated signal for additional sample values exceeding the threshold value at a distance of one or more value sample intervals from the moment of occurrence of at least one maximum value, forming, by means of the maximum values and additional sample values that were searched for, a signal that represents the part of the modulated signal that exceeds the threshold value, and subtracting from the modulated signal the formed signal representing the part that exceeds the threshold value.
    Type: Application
    Filed: February 25, 2003
    Publication date: November 27, 2003
    Inventors: Olli Piirainen, Samu Saarinen, Tapio Vuopala