Patents by Inventor Jacob Schelm

Jacob Schelm 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).

  • Multipath channel tap delay estimation in a CDMA spread spectrum receiver
    Patent number: 7061967
    Abstract: A method and apparatus for estimating channel tap delays of multipath components in a CDMA received signal. The search for the tap delays are split into two phases namely, a phase 1 and a phase 2 search. The phase 1 search is a coarse resolution quick search adapted to generate a rough estimate of the location of the tap delays. During this phase, the candidate codes are summed and the input signal correlated with the code sum creating an ambiguity in the code associated with the multipath. A finer resolution slower phase 2 search resolves the code ambiguity present in the initial rough estimates of the phase 1 search. Additional phase 2 correlations may be performed to implement a code-tracking loop.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: June 13, 2006
    Assignee: Comsys Communication & Signal Processing Ltd.
    Inventors: Jacob Schelm, Ophir Shabtay, Yaniv Avital, Ehud Reshef
  • Multipath channel tap delay estimation in a CDMA spread spectrum receiver
    Publication number: 20030235238
    Abstract: A method and apparatus for estimating channel tap delays of multipath components in a CDMA received signal. The search for the tap delays are split into two phases namely, a phase 1 and a phase 2 search. The phase 1 search is a coarse resolution quick search adapted to generate a rough estimate of the location of the tap delays. During this phase, the candidate codes are summed and the input signal correlated with the code sum creating an ambiguity in the code associated with the multipath. A finer resolution slower phase 2 search resolves the code ambiguity present in the initial rough estimates of the phase 1 search. Additional phase 2 correlations may be performed to implement a code-tracking loop.
    Type: Application
    Filed: June 24, 2002
    Publication date: December 25, 2003
    Applicant: Comsys Communication & Signal Processing Ltd.
    Inventors: Jacob Schelm, Ophir Shabtay, Yaniv Avital, Ehud Reshef