Patents by Inventor Eric Copeland

Eric Copeland 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).

  • Synchronization and bit detection in a single spreading sequence SAMA receiver
    Patent number: 6625204
    Abstract: In simultaneous reception of overlapping signals sharing a single spreading sequence, packet start times are found by separately demodulating, low pass filtering and despreading in-phase and quadrature components. Despread in-phase and quadrature signals are provided to sychronization filters connected in parallel and arranged in two identical pairs. Outputs from filters in different pairs are added, and the sums are squared. The squared signals are added. An exceeded threshold of the output from the last adder delineates a packet start. Knowing packet start times facilitates separating the overlapping inbound signals.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: September 23, 2003
    Assignee: Aloha Networks, Inc.
    Inventors: Norman Abramson, Eric Copeland