Patents Examined by Betsy Depee
  • Devices and methods employing hermetic transforms for encoding and decoding digital information in spread-spectrum communication systems
    Patent number: 10447340
    Abstract: In a direct sequence spread-spectrum (DSSS) systems, such as CDMA, information is encoded in symbols using phase shift keying or quadrature amplitude modulation. Further, a transmitter applied a selected time shifted lag to each symbol to convey additional information. A receiver detects both the symbol data and the lag value. The receiver can use a hermetic matched filter matrix to identify the lag.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: October 15, 2019
    Assignee: VERTOCOMM, INC.
    Inventor: Harvey C. Woodsum