Patents by Inventor Irving Dostis

Irving Dostis 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).

  • PSK Modulator with reduced adjacent channel interference
    Patent number: 4261053
    Abstract: A PSK modulator employs a waveform of the overlapped raised cosine type which results in reduced adjacent channel interference. Waveforms of the overlapped raised cosine type include the overlapped raised cosine waveform itself as well as waveforms substantially similar thereto. Such waveforms can be produced, in a PSK modulator, by employing a Thomson filter with a single attenuation pole. Employing such a filter with a time bandwidth product (BT) of 1.2 provides the overlapped raised cosine waveform. However, changing the Thomson filter's BT product to 1.0 to thereby generate a waveform of the overlapped raised cosine type provides even further improvements in adjacent channel interference.
    Type: Grant
    Filed: April 2, 1979
    Date of Patent: April 7, 1981
    Assignee: Satellite Business Systems
    Inventors: Irving Dostis, Myung-Ki Lee, Osamu Shimbo