Patents by Inventor Tapio M. Heikkilä

Tapio M. Heikkilä 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).

  • Generating higher order modulation using QPSK modulations
    Patent number: 7680213
    Abstract: A method and system generates a higher order modulation, in which a complex sequence of binary digits corresponding to symbols of a higher order modulation is received. The symbols correspond to constellation points of the higher order modulation. First mapping means map the symbols of the higher order modulation to first constellation points of a first QPSK modulation and output an output signal of the first QPSK modulation corresponding to the first constellation points. Similarly, second mapping means map the symbols of the higher order modulation to second constellation points of a second QPSK modulation and output an output signal of the second QPSK modulation corresponding to the second constellation points. Adding means add the output signals of the first and second QPSK modulations, thereby generating the constellation points of the higher order modulation.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: March 16, 2010
    Assignee: Nokia Corporation
    Inventors: Jyrki Mäntyla, Risto Alasaarela, Tapio M. Heikkilä