Patents by Inventor Markku Tirkkonen

Markku Tirkkonen 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 apparatus for implementing automatic gain control in a system
    Patent number: 6473016
    Abstract: The invention relates to a method and an apparatus for implementing automatic gain control in a system where an analog signal is converted into a digital signal. The apparatus comprises means (208) for performing automatic gain control of the adjustable signal in an analog manner using a gain control step of predetermined size and means (446, 448) for performing inverse gain control of the digitized signal in such a way that, after the digital adjustment, the power of the signal is the same as before the analog adjustment. To enable an accurate gain control, the apparatus further comprises means (410, 412, 214, 420) for determining the maximum energy of the signal during a predetermined measurement period, means (426, 428) for comparing the determined maximum energy to preset threshold values (430, 432), and means (436) for performing an automatic gain control of the analog signal and a compensation for the gain control to the digital signal, if the measured value exceeds the threshold.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: October 29, 2002
    Assignee: Nokia Networks Oy
    Inventors: Olli Piirainen, Markku Tirkkonen
  • Method and apparatus for automatic gain control
    Publication number: 20010050625
    Abstract: The invention relates to a method and an apparatus for implementing automatic gain control in a system where an analog signal is converted into a digital signal. The apparatus comprises means (208) for performing automatic gain control of the adjustable signal in an analog manner using a gain control step of predetermined size and means (446, 448) for performing inverse gain control of the digitized signal in such a way that, after the digital adjustment, the power of the signal is the same as before the analog adjustment. To enable an accurate gain control, the apparatus further comprises means (410, 412, 214, 420) for determining the maximum energy of the signal during a predetermined measurement period, means (426, 428) for comparing the determined maximum energy to preset threshold values (430, 432), and means (436) for performing an automatic gain control of the analog signal and a compensation for the gain control to the digital signal, if the measured value exceeds the threshold.
    Type: Application
    Filed: May 9, 2001
    Publication date: December 13, 2001
    Inventors: Olli Piirainen, Markku Tirkkonen