Patents by Inventor Kirsten Matheus

Kirsten Matheus 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).

  • Frequency tracking device for a receiver of a multi-carrier communication system
    Patent number: 7009932
    Abstract: A frequency tracking device (FTD) in particular for use in a OFDM communication system comprises a selector (SEL) which selects on the basis of N channel coefficients (Cest) a number M of subcarriers corresponding to the M channel coefficients (Cest) having the largest absolute values. An evaluator (EVAL) of the frequency tracking device (FTD) determines a frequency deviation estimate (foff,est) on the basis of the selected M subcarriers and the selected M channel coefficients. In addition to or instead of a feedback correction unit (CORR1) provided upstream of a multi-carrier filter bank (8; FFT), the frequency tracking device (FTD) can also comprise a feed forward correction unit (CORR2) provided downstream of the receiver multi-carrier filter bank (8).
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: March 7, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Kirsten Matheus, Udo Wachsmann, Uwe Dettmar
  • Frequency tracking device for a receiver of a multi-carrier communication system
    Publication number: 20020021715
    Abstract: A frequency tracking device (FTD) in particular for use in a OFDM communication system comprises a selector (SEL) which selects on the basis of N channel coefficients (Cest) a number M of subcarriers corresponding to the M channel coefficients (Cest) having the largest absolute values. An evaluator (EVAL) of the frequency tracking device (FTD) determines a frequency deviation estimate (foff,est) on the basis of the selected M subcarriers and the selected M channel coefficients. In addition to or instead of a feedback correction unit (CORR1) provided upstream of a multi-carrier filter bank (8; FFT), the frequency tracking device (FTD) can also comprise a feed forward correction unit (CORR2) provided downstream of the receiver multi-carrier filter bank (8).
    Type: Application
    Filed: May 31, 2001
    Publication date: February 21, 2002
    Inventors: Kirsten Matheus, Udo Wachsmann, Uwe Dettmar