Patents by Inventor Edward Kwok Shum Au

Edward Kwok Shum Au 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).

  • Linear precoding for MIMO channels with outdated channel state information in multiuser space-time block coded systems with multi-packet reception
    Patent number: 8223626
    Abstract: A joint set of linear precoder designs is provided for single cell uplink multiuser space-time block coded multiple-input multiple-output (MIMO) systems with multi-packet reception by exploiting outdated channel state information. By deriving the pairwise error probability with respect to both minimum and average codeword distance design metrics, the technique solves an optimization problem subject to transmit power constraint for each user and dependent on the outdated channel state information. Due to the non-convex nature of the optimization problem, an iterative technique based on alternating minimization and projected gradient can be used to solve for a joint linear preceding structure for general space-time block coding. The linear precoding structure is then sent from the base station to various consumer premise equipment for use in later transmissions. For orthogonal space-time block code, a simplified distributed technique is provided to solve for a closed-form solution of the optimization problem.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: July 17, 2012
    Assignee: Yim Tu Investments Ltd., LLC
    Inventors: Edward Kwok Shum Au, Jane Wei Huang, Vincent Kin Nang Lau
  • LINEAR PRECODING FOR MIMO CHANNELS WITH OUTDATED CHANNEL STATE INFORMATION IN MULTIUSER SPACE-TIME BLOCK CODED SYSTEMS WITH MULTI-PACKET RECEPTION
    Publication number: 20090180454
    Abstract: A joint set of linear precoder designs is provided for single cell uplink multiuser space-time block coded multiple-input multiple-output (MIMO) systems with multi-packet reception by exploiting outdated channel state information. By deriving the pairwise error probability with respect to both minimum and average codeword distance design metrics, the technique solves an optimization problem subject to transmit power constraint for each user and dependent on the outdated channel state information. Due to the non-convex nature of the optimization problem, an iterative technique based on alternating minimization and projected gradient can be used to solve for a joint linear preceding structure for general space-time block coding. The linear precoding structure is then sent from the base station to various consumer premise equipment for use in later transmissions. For orthogonal space-time block code, a simplified distributed technique is provided to solve for a closed-form solution of the optimization problem.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 16, 2009
    Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Edward Kwok Shum Au, Jane Wei Huang, Vincent Kin Nang Lau