Patents by Inventor Maristella Frazzetto

Maristella Frazzetto 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).

  • Method and system for resolving the acquisition ambiguity and the problem of false lock in tracking BOC(m,n) modulated signals, particularly for satellite positioning/navigation systems
    Patent number: 7949038
    Abstract: A method and a system for the acquisition and tracking of BOC(m,n) modulated codes, m/n equal to an integer, in which a correlation function is calculated of the BOC(m,n) modulated code received from a remote transmitter with a code wa locally generated at a receiver terminal according to one from the following the relationships: wa(?)=c(?n)?a·[prn(?n+Tc/2)?prn(?n?Tc/2)] wa(?)=c(?n)?a·[prn(?n+nTc/2m)?prn(?n?nTc/2m)] wa(?)=c(?n)?a·[prn(?n+nTc/4m)+prn(?n?nTc/4m)] wa(?)=c(?n)?a·[prn(?n+3nTc/4m)+prn(?n?3nTc/4m)] w(?)=[prn(?n+nTc/4m)+prn(?n?nTc/4m)] w(?)=[prn(?n+nTc/2m)?prn(?n?nTc/2m)] wherein c(?) is a local replica of the BOC modulated pseudo-random noise code with delay ?n, PRN(?) is a replica of the unmodulated pseudo-random noise code, and a is a predetermined weight coefficient, and the correlation function being at the base of an acquisition test function whereby a code acquisition is recognized for a value of the test function being higher than a predetermined threshold.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: May 24, 2011
    Assignee: STMicroelectronics, S.r.l.
    Inventors: Giuseppe Avellone, Maristella Frazzetto, Ettore Messina
  • Method and system for resolving the acquisition ambiguity and the problem of false lock in tracking BOC(m,n) modulated signals, particularly for satellite positioning/navigation systems
    Publication number: 20090046766
    Abstract: A method and a system for the acquisition and tracking of BOC(m,n) modulated codes, m/n equal to an integer, in which a correlation function is calculated of the BOC(m,n) modulated code received from a remote transmitter with a code wa locally generated at a receiver terminal according to one from the following the relationships: wa(?)=c(?n)?a·[prn(?n+Tc/2)?prn(?n?Tc/2)] wa(?)=c(?n)?a·[prn(?n+nTc/2m)?prn(?n?nTc/2m)] wa(?)=c(?n)?a·[prn(?n+nTc/4m)+prn(?n?nTc/4m)] wa(?)=c(?n)?a·[prn(?n+3nTc/4m)+prn(?n?3nTc/4m)] w(?)=[prn(?n+nTc/4m)+prn(?n?nTc/4m)] w(?)=[prn(?n+nTc/2m)?prn(?n?nTc/2m)] wherein c(?) is a local replica of the BOC modulated pseudo-random noise code with delay ?n, PRN(?) is a replica of the unmodulated pseudo-random noise code, and a is a predetermined weight coefficient, and the correlation function being at the base of an acquisition test function whereby a code acquisition is recognized for a value of the test function being higher than a predetermined threshold.
    Type: Application
    Filed: December 12, 2007
    Publication date: February 19, 2009
    Applicant: STMicroelectronics S.r.l.
    Inventors: Giuseppe Avellone, Maristella Frazzetto, Ettore Messina