Patents by Inventor Gerhard Guenter Theodor Kramer

Gerhard Guenter Theodor Kramer 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).

  • MIMO systems having a channel decoder matched to a MIMO detector
    Patent number: 7013116
    Abstract: A method and apparatus for reducing the number of erred bits in the decoded signal by using a channel decoder whose transfer characteristic is matched to the transfer characteristic of the MIMO detector. This means that the curve of the transfer characteristic of the MIMO detector is 1) above the curve of the reflected transpose of the transfer characteristic of the channel decoder for about 95% of the curve, and 2) close to the reflected transpose of the curve of the transfer characteristic of the channel decoder. Particularly, an LDPCC decoder can be used as the channel decoder and can be matched to the MIMO detector by matching 1) the transfer characteristic of the LDPCC decoder's CND to 2) the transfer characteristic of a combination of the MIMO detector and the LDPCC VND. Furthermore, the LDPCC can be similarly matched to any appropriate detector in addition to or instead of the MIMO detector.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: March 14, 2006
    Assignee: Lucent Technologies Inc.
    Inventors: Alexei Ashikhmin, Gerhard Guenter Theodor Kramer, Stephan Ten Brink
  • MIMO systems having a channel decoder matched to a MIMO detector
    Publication number: 20040002309
    Abstract: A method and apparatus for reducing the number of erred bits in the decoded signal by using a channel decoder whose transfer characteristic is matched to the transfer characteristic of the MIMO detector. This means that the curve of the transfer characteristic of the MIMO detector is 1) above the curve of the reflected transpose of the transfer characteristic of the channel decoder for about 95% of the curve, and 2) close to the reflected transpose of the curve of the transfer characteristic of the channel decoder. Particularly, an LDPCC decoder can be used as the channel decoder and can be matched to the MIMO detector by matching 1) the transfer characteristic of the LDPCC decoder's CND to 2) the transfer characteristic of a combination of the MIMO detector and the LDPCC VND. Furthermore, the LDPCC can be similarly matched to any appropriate detector in addition to or instead of the MIMO detector.
    Type: Application
    Filed: June 26, 2002
    Publication date: January 1, 2004
    Inventors: Alexei Ashikhmin, Gerhard Guenter Theodor Kramer, Stephan Ten Brink