Patents by Inventor John R. Gelm

John R. Gelm 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).

  • CDMA radiotelephone having optimized slotted mode and long code operation
    Patent number: 5596571
    Abstract: A radiotelephone (10) capable of operation within a CDMA radiotelephone system. The radiotelephone includes a receiver (30) for receiving a paging channel transmission; a system time pseudonoise (PN) generator (18); and despreading circuitry (20, 22, 24 26, 28), having an input coupled to the receiver, for despreading the paging channel transmission received during at least a portion of the assigned slot. The assigned slot is predetermined to have a duration that is three times the duration of a rollover period of the system time pseudonoise (PN) generator (26.667 msec) and four times the duration of one frame (20 msec), or 80 msec. The use of predetermined masks for initializing the PN generators, and in particular a Long Code PN generator (32), is also described.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: January 21, 1997
    Assignee: Nokia Mobile Phones Ltd.
    Inventors: Adam F. Gould, James R. Robertson, John W. Noneman, John R. Gelm
  • CDMA radiotelephone having optimized slotted mode and long code operation
    Patent number: 5491718
    Abstract: A radiotelephone (10) capable of operation within a CDMA radiotelephone system. The radiotelephone includes a receiver (30) for receiving a paging channel transmission; a system time pseudonoise (PN) generator (18); and despreading circuitry (20, 22, 24 26, 28), having an input coupled to the receiver, for despreading the paging channel transmission received during at least a portion of the assigned slot. The assigned slot is predetermined to have a duration that is three times the duration of a rollover period of the system time pseudonoise (PN) generator (26.667 msec) and four times the duration of one frame (20 msec), or 80 msec. The use of predetermined masks for initializing the PN generators, and in particular a Long Code PN generator (32), is also described.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: February 13, 1996
    Assignee: Nokia Mobile Phones Ltd.
    Inventors: Adam F. Gould, James R. Robertson, John W. Noneman, John R. Gelm