Patents by Inventor Mohamad A. Sawan

Mohamad A. Sawan 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).

  • Adaptive digital predistortion for power amplifiers with real time modeling of memoryless complex gains
    Patent number: 6072364
    Abstract: In an adaptive method and device for predistorting a signal to be transmitted, supplied by a signal source to an input of a power amplifier having a output for delivering an amplified output signal, the following steps are conducted: predistorting the signal to be transmitted by means of cascaded predistortion amplitude and phase look-up tables interposed between the signal source and the input of the power amplifier, producing a first feedback signal in response to the predistorted signal, producing a second feedback signal in response to the amplified output signal from the power amplifier, delaying the first feedback signal for eliminating any time lag between the first and second feedback signals, and real time modeling the predistortion amplitude and phase look-up tables in response to the first and second feedback signals in order to update these two tables.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: June 6, 2000
    Assignee: Amplix
    Inventors: Ernesto G. Jeckeln, Fadhel M. Ghannouchi, Mohamad A. Sawan