Patents by Inventor Amir Khandanl

Amir Khandanl 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).

  • System and method for reducing the peak power in multi-carrier modulation
    Patent number: 7151804
    Abstract: A multi-tone modulation method is provided which reduces a peak average power ratio. The method involves defining a respective signal constellation for each center frequencies having redundant mappings for each set of input elements, and then selecting a particular permutation of mappings having a reduced peak power for the multi-tone signal. A method of shaping is also employed in which a hierarchy of blocks are defined, each layer having fewer blocks than each previous layer. The hierarchy is used to select a particular subset of an expanded constellation.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: December 19, 2006
    Assignee: Nortel Networks Limited
    Inventors: Wen Tong, Amir Khandanl
  • System and mehod for reducing the peak power in multi-carrier modulation
    Publication number: 20030099302
    Abstract: A multi-tone modulation method is provided which reduced a peak average power ratio. The method involves defining a respective signal constellation for each center frequencies having redundant mappings for each set of input elements, and then selecting a particular permutation of mappings having a reduced peak power for the multi-tone signal. A method of shaping is also employed in which a hierarchy of blocks are defined, each layer having fewer blocks than each previous layer. The hierarchy is used to select a particular subset of an expanded constellation.
    Type: Application
    Filed: August 23, 2002
    Publication date: May 29, 2003
    Inventors: Wen Tong, Amir Khandanl