Patents by Inventor Marc Frerich

Marc Frerich 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).

  • Patent number: 6470177
    Abstract: The present invention relates generally to the problems associated with sectorization of cells in cellular communications systems, and more particularly to interference between sectors. The invention provides the possibility of flexibly distributing hardware between sectors in a cell by allowing one transmitter to be shared by all the sectors. Since a beacon signal must be transmitted to each sector in a cell, it can be combined with the signal from the transmitter before being transmitted from an antenna. Thus it is necessary to only deploy one carrier for the beacon. Interference reduction in sectored sites is also improved. In addition, different antenna patterns may be combined to provide the site with all kinds of coverage patterns. Downlink diversity is furthermore attainable by having overlapping uncorrelated antenna patterns.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: October 22, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Sören Andersson, Henrik Dam, Magnus Berg, Marc Frerich, Felix Ahrens, Rainer Bormann