Patents by Inventor Torbjörn Gunnar Widhe

Torbjörn Gunnar Widhe 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 base station for orthogonal frequency division multiplexing (OFDM) signal processing
    Patent number: 8126070
    Abstract: A method and base station for forming an OFDM signal from a baseband signal includes a partitioning unit configured to partition a block of baseband signal samples into sub-blocks. A sub-carrier mapper maps the sub-blocks onto adjacent sub-carrier blocks of an OFDM multi-carrier to form corresponding unprefixed OFDM symbols. A cyclic prefix adder adds a cyclic prefix to each mapped sub-block to form prefixed OFDM symbols. Phase compensations force the unprefixed OFDM symbol part of all subsequently up-converted prefixed OFDM symbols to start at the same phase. Up-converters up-convert the phase compensated prefixed OFDM symbols to respective radio frequency bands having center frequencies and bandwidths that preserve the OFDM multi-carrier structure. A combiner combines the up-converted phase compensated prefixed OFDM symbols into an OFDM signal.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: February 28, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Thord Hyllander, Leonard Rexberg, Jacob Österling, Vimar Björk, Tore Mikael André, Torbjörn Gunnar Widhe, Daniel Larsson