Patents by Inventor Ian Opperman

Ian Opperman 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).

  • Publication number: 20080089393
    Abstract: The present invention relates to positioning of a mobile signal transmitter (MT), wherein a respective distance (DMT-100a-DMT-100d) between the transmitter (MT) and each of a plurality of sensors (100a-100d) is determined based on a direct sequence spread spectrum signal (SMT). A transmitter delay of the signal (SMT) is estimated with high accuracy by, in each sensor (100a-100d), cross-correlating an over-sampled representation of the signal (SMT) with an appropriate local spreading sequence (SPP), which contains poly-phased symbol values being different from a set of symbols in the direct sequence used to spread the transmitted signal (SMT). The local spreading sequence (SPP) has a nominal chip period, which is equivalent to the chip period of the over-sampled representation of the signal (SMT).
    Type: Application
    Filed: October 7, 2004
    Publication date: April 17, 2008
    Inventor: Ian Opperman