Patents by Inventor Larry W. Massingill

Larry W. Massingill 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).

  • Patent number: 5850392
    Abstract: In a time division multiple access (TDMA) radiotelephone communications system, a spread spectrum random access channel signal representing a random access message is communicated from a radiotelephone to a central station according to a spreading sequence. In response, a TDMA radiotelephone communications channel is assigned to the radiotelephone. A time division multiplexed radiotelephone communications signal is communicated between the radiotelephone and the central station on the assigned TDMA radiotelephone communications channel over a time division multiplexed carrier frequency band. Preferably, in communicating the spread spectrum random access channel signal, a random access channel signal, representing the random access channel message, is direct sequence modulated according to the spreading sequence to produce a direct sequence modulated random access channel signal. According to a two-stage detection aspect, a synchronization sequence may be associated with a plurality of spreading sequences.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: December 15, 1998
    Assignee: Ericsson Inc.
    Inventors: Yi-Pin Eric Wang, Amer Hassan, Stanley L. Reinhold, Larry W. Massingill
  • Patent number: 4695805
    Abstract: Apparatus for synchronizing an internally generated signal with an externally generated periodic or aperiodic signal to generate a periodic output signal phase synchronized with the externally generated signal comprising a local reference signal source, a sampling phase detector, a wide angle phase shifter, and a reference locked phase locked oscillator to achieve the phase alignment of the desired output signal to the input reference signal. The apparatus may contain an optional signal conditioner to condition the input reference signal for processing within the apparatus.
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: September 22, 1987
    Assignee: OnLine Computer Systems Inc.
    Inventors: Larry W. Massingill, Derrick O. Perkins