Patents by Inventor M. Zaheer Ali

M. Zaheer Ali 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).

  • High speed FFT processor
    Patent number: 4138730
    Abstract: An FDM/TDM transmultiplexer uses sampling rate multiplication to increase the sampling rate for time division multiplexed (TDM) to frequency division multiplexed (FDM) conversion and decrease the sampling rate for FDM to TDM conversion. The rate multiplication filters are realized digitally in order to exploit the computational advantage of Fast Fourier Transform (FFT) algorithm, and channel filtering is implemented by a single time-shared sixth-order elliptic digital recursive filter. A novel FFT processor and recursive filter are disclosed which may be used in the system.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: February 6, 1979
    Assignee: Communications Satellite Corporation
    Inventor: M. Zaheer Ali