Patents by Inventor Samir Attallah

Samir Attallah 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).

  • Method and apparatus for reducing peak to average power ratio in a multi-carrier modulation communication system
    Patent number: 6985533
    Abstract: A probability distribution transformer (110) in a multi-carrier modulation (MCM) transmitter (101) receives a MCM signal comprising data packets that represent amplitude values, where the amplitude values are characterized by a Gaussian probability density function. The probability distribution transformer (110), which is provided by a number of piecewise linear transforms, produce a transformed MCM signal comprising transformed data packets which represent transformed amplitude values, where the transformed amplitude values are characterized by a uniform probability density function. When transmitted, the transformed MCM signal results in reduced peak-to-average power ratio (PAPR). In a corresponding MCM receiver (102), a probability distribution inverter (180) inverts the transformation.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: January 10, 2006
    Assignee: Agency for Science, Technology and Research
    Inventors: Samir Attallah, K. Abed-Meraim
  • Method and apparatus for reducing peak to average power ratio in a multi-carrier modulation communication system
    Publication number: 20020168013
    Abstract: A probability distribution transformer (110) in a multi-carrier modulation (MCM) transmitter (101) receives a MCM signal comprising data packets that represent amplitude values, where the amplitude values are characterized by a Gaussian probability density function. The probability distribution transformer (110), which is provided by a number of piecewise linear transforms, produce a transformed MCM signal comprising transformed data packets which represent transformed amplitude values, where the transformed amplitude values are characterized by a uniform probability density function. When transmitted, the transformed MCM signal results in reduced peak-to-average power ratio (PAPR). In a corresponding MCM receiver (102), a probability distribution inverter (180) inverts the transformation.
    Type: Application
    Filed: February 7, 2001
    Publication date: November 14, 2002
    Inventors: Samir Attallah, K. Abed-Meraim