Patents by Inventor Torsten J. Carlsson

Torsten J. Carlsson 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 configuring a RAKE receiver
    Patent number: 7382821
    Abstract: A searcher uses an input signal, and for example, a matched filter to generate a first set of candidate paths. A selector uses the input signal and the first set of candidate paths to generate a second set of paths. The second set of paths is used to configure the fingers of a RAKE receiver. According to one aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses M correlators to generate a set of M correlation values. The second stage uses the M correlation values to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses a multiple of M correlators to track the M paths and generate a set of M estimates. The second stage uses the M estimates to select N paths that are used to configure the N fingers of the RAKE receiver.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: June 3, 2008
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Roozbeh Atarius, Torsten J. Carlsson, Håkan B. Eriksson, Kjell B. Gustafsson, Torgny Palenius, Christer Östberg
  • Method and apparatus for configuring a rake receiver
    Patent number: 7184462
    Abstract: A searcher uses an input signal, and for example, a matched filter to generate a first set of candidate paths. A selector uses the input signal and the first set of candidate paths to generate a second set of paths. The second set of paths is used to configure the fingers of a RAKE receiver. According to one aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses M correlators to generate a set of M correlation values. The second stage uses the M correlation values to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses a multiple of M correlators to track the M paths and generate a set of M estimates. The second stage uses the M estimates to select N paths that are used to configure the N fingers of the RAKE receiver.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: February 27, 2007
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Roozbeh Atarius, Torsten J. Carlsson, H{dot over (a)}kan B. Eriksson, Kjell B. Gustafsson, Torgny Palenius, Christer Östberg