Patents by Inventor Michael Joham

Michael Joham 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).

  • Publication number: 20070177551
    Abstract: A method transmits signals of a link between a transmitting station and a receiving station of a radiocommunication system, wherein at least one pilot signal is transmitted between the stations NB and UE in order to enable estimation of at least one channel of said link by the receiving station. The channel estimation results are determined in order to detect data to be transmitted to the receiving station by means of the signals of the link. Deviation between the transmission characteristics of the pilot signal used for channel estimation and the transmission characteristics of the signals of the link is taken into account when the signals of the link which are to be transmitted are produces by the transmitting station and/or when the received signals of the link are processed by the receiving station.
    Type: Application
    Filed: August 12, 2004
    Publication date: August 2, 2007
    Inventors: Michael Joham, Josef Nossek, Alexander Seeger, Wolfgang Utschick, Benno Zerlin
  • Patent number: 7039442
    Abstract: According to the invention, a base station has an antenna device with a plurality of antenna elements and is connected to a subscriber station via a radio interface. The direction of incidence, the attenuation and the delay times of connection paths used for beam forming for signal sections for channel estimation purposes are determined from the transmissions of the other radio station in a known manner. The beam-forming vector for the transmit signal is constant during these signal sections for channel estimation purposes, for which the radio station can estimate a reception characteristic of the other radio station. Outside the signal sections for channel estimation, a symbol-specific beam-forming vector is determined which takes into account variable symbol-related properties of the transmit signal (for example correlation properties of CDMA codes) which are not constant during a time slot but rather vary from symbol to symbol.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: May 2, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Michael Joham, Josef Nossek, Wolfgang Utschick