Patents by Inventor Seppo Nousiainen

Seppo Nousiainen 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: 5754560
    Abstract: The invention provides advantageous and reliable loop equipment (60) for establishing a test loop for monitoring the condition of a radio station including at least two antennas. The loop equipment (60) comprises input ports (61, 61'), output ports (69, 69') and a controllable selector switch (62) wherewith the signal of one input port (61') is selected to at least one output port (69, 69'). The loop epuipment is so adapted that its input ports (61, 61') are connected to the outputs of tansmitters (TX, TX') and output ports (69, 69') to the input of a receiver (RX, RX'). Various test loops for monitoring the condition of transmitters, receivers and antennas at a radio station can be established by means of the loop equipment.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: May 19, 1998
    Assignee: Nokia Telecommunications Oy
    Inventors: Seppo Nousiainen, Ismo Pudas
  • Patent number: 5638034
    Abstract: Tuning a combiner filter, which includes two separate tuning modes: coarse adjustment applied when the combiner is taken into use by utilizing a measuring branch for forward power and a coarse measuring branch for reflected power; and fine adjustment applied in continuous operation by utilizing the measuring branch for forward power and a fine measuring branch for reflected power. The two-stage adjustment decreases the mutual interference of the filters during tuning. The correct tuning frequency of the combiner filter is obtained as the average point of the reversing points obtained in the adjustment process, the filter being driven to the average position. This so-called positional average tuning has two advantages: the effect of noise present in the power measuring line is reduced, and the tuning error caused by the termination of the dynamics of the A/D converter positioned after the detector at low power levels and good combiner filter settings is diminished.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: June 10, 1997
    Assignee: Nokia Telecommunications Oy
    Inventors: Pekka Heikkila, Eero Koukkari, Seppo Nousiainen, Juha Vasanoja, Martti Kainulainen, Jukka Kyllonen, Teuvo Haukipuro, Esa Niemitalo, Harri Tikka
  • Patent number: 5525940
    Abstract: A device for tuning a combiner filter. The measuring signals (P.sub.rl . . . P.sub.rn, P.sub.F1 . . . P.sub.Fn) of a number of different combiner filters are multiplexed to the same detectors. Multiplexing allows the measuring and adjusting electronics required by the tuning and adjusting means of combiner filters to be simplified considerably especially with a high number of combiner filters. Multiplexing of measuring signals is used primarily to select the sample signals of the forward and reflected power of one and the same combiner filter to be tuned for the measuring electronics. In the invention selectors for reflected power and forward power are independent of each other, which allows isolation measurement between different channels. The sample signal of the forward power of one combiner filter and the sample signal of the reflected power of another combiner filter are thus connected to the measuring electronics.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: June 11, 1996
    Assignee: Nokia Telecommunications Oy
    Inventors: Pekka Heikkila, Eero Koukkari, Seppo Nousiainen, Juha Vasanoja, Martti Kainulainen, Jukka Kyllonen, Teuvo Haukipupo, Esa Niemitalo, Harri Tikka