Patents by Inventor Johan von Perner

Johan von Perner 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).

  • Radio channel squelching systems
    Patent number: 5970399
    Abstract: Detection of in-band noise in a radio communications voice channel is provided by mixing a signal having a known frequency into a radio signal containing a voice channel signal in an in-band range, thereby translating the voice channel signal out of the in-band range. The in-band range is thereafter examined for the presence of noise signal energy whose presence can be indicative of in-band noise. Squelching of the voice channel is provided in the event that in-band noise energy exceeds a predetermined threshold.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: October 19, 1999
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Jafar Rostamy, Johan von Perner, Anders Engman