Patents by Inventor David E. KEYES

David E. KEYES 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: 11075781
    Abstract: A method of detecting a symbol transmitted over a communication channel in a multiple input-multiple output communication system. The method includes receiving a plurality of symbols transmitted over a communication channel of a multiple input-multiple output communication system. A sphere radius is initialized based on attributes of the communication channel. A first matrix of possible transmitted signals is defined as well as a second matrix of received symbols. The matrix of possible transmitted signals is searched using a breadth-first search (BFS). Each level of the search tree is analyzed utilizing matrix multiplication to determine selected symbols satisfying the initialized sphere radius. A maximum likelihood solution is of the transmitted symbols is derived based on the selected symbols.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: July 27, 2021
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Hatem Ltaief, Zouheir Rezki, Mohamed Amine Arfaoui, Mohamed-Slim Alouini, David E. Keyes
  • Publication number: 20200322190
    Abstract: A method of detecting a symbol transmitted over a communication channel in a multiple input-multiple output communication system. The method includes receiving a plurality of symbols transmitted over a communication channel of a multiple input-multiple output communication system. A sphere radius is initialized based on attributes of the communication channel. A first matrix of possible transmitted signals is defined as well as a second matrix of received symbols. The matrix of possible transmitted signals is searched using a breadth-first search (BFS). Each level of the search tree is analyzed utilizing matrix multiplication to determine selected symbols satisfying the initialized sphere radius. A maximum likelihood solution is of the transmitted symbols is derived based on the selected symbols.
    Type: Application
    Filed: June 18, 2020
    Publication date: October 8, 2020
    Inventors: Hatem LTAIEF, Zouheir REZKI, Mohamed Amine ARFAOUI, Mohamed-Slim ALOUINI, David E. KEYES
  • Patent number: 10778477
    Abstract: A method of detecting u symbol transmitted over a communication channel in a multiple input-multiple output communication system. The method includes receiving a plurality of symbols transmitted over a communication channel of a multiple input-multiple output communication system. A sphere radius is initialized based on attributes of the communication channel. A first matrix of possible transmitted signals is defined as well as a second matrix of received symbols. The matrix of possible transmitted signals is searched using a breadth-first search (BFS). Each level of the search tree is analyzed utilizing matrix multiplication to determine selected symbols satisfying the initialized sphere radius. A maximum likelihood solution is of the transmitted symbols is derived based on the selected symbols.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: September 15, 2020
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Hatem Ltaief, Zouheir Rezki, Mohamed Amine Arfaoui, Mohamed-Slim Alouini, David E. Keyes
  • Publication number: 20190288882
    Abstract: A method of detecting u symbol transmitted over a communication channel in a multiple input-multiple output communication system. The method includes receiving a plurality of symbols transmitted over a communication channel of a multiple input-multiple output communication system. A sphere radius is initialized based on attributes of the communication channel. A first matrix of possible transmitted signals is defined as well as a second matrix of receiv ed symbols. The matrix of possible transmitted signals is searched using a breadth-first search (BFS). Each level of the search tree is analyzed utilizing matrix multiplication to determine selected symbols satisfying the initialized sphere radius. A maximum likelihood solution is of the transmitted symbols is derived based on the selected symbols.
    Type: Application
    Filed: September 27, 2017
    Publication date: September 19, 2019
    Inventors: Hatem LTAIEF, Zouheir REZKI, Mohamed Amine ARFAOUI, Mohamed-Slim ALOUINI, David E. KEYES