Patents by Inventor D. K. Roberts

D. K. Roberts 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).

  • SPACE-TIME/SPACE-FREQUENCY CODING FOR MULTI-SITE AND MULTI-BEAM TRANSMISSION
    Publication number: 20090190681
    Abstract: The present invention relates to space-time or space-frequency coding in cellular systems. The same data is transmitted from different antennas with different coverage areas, corresponding to different cells. The different data streams have different parts of the space-time block codes applied. A mobile terminal can combine the different parts of the space-time block codes in different received signals. This provides better performance than the known techniques for single frequency networks. The invention can also be applied to antennas with different coverage areas from the same site, and different beams formed with antenna arrays.
    Type: Application
    Filed: August 21, 2007
    Publication date: July 30, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Timothy James Moulsley, D. K. Roberts, Matthew Peter John Baker, Xusheng Wei