Method and system for resolving the acquisition ambiguity...

Details Method and system for resolving the acquisition ambiguity... Method and system for resolving the acquisition ambiguity...

2011-05-24

2011-05-24

Flores, Leon (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S130000, C375S136000, C375S142000, C375S143000, C375S316000, C375S340000, C375S343000, C375S354000, C375S355000, C370S315000, C455S098000, C342S352000

Reexamination Certificate

active

07949038

ABSTRACT:
A method and a system for the acquisition and tracking of BOC(m,n) modulated codes, m
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 walocally generated at a receiver terminal according to one from the following the relationships:in-line-formulae description="In-line Formulae" end="lead"?wa(τ)=c(τn)−a·[prn(τn+Tc/2)−prn(τn−Tc/2)]in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?wa(τ)=c(τn)−a·[prn(τn+nTc/2m)−prn(τn−nTc/2m)]in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?wa(τ)=c(τn)−a·[prn(τn+nTc/4m)+prn(τn−nTc/4m)]in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?wa(τ)=c(τn)−a·[prn(τn+3nTc/4m)+prn(τn−3nTc/4m)]in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?w(τ)=[prn(τn+nTc/4m)+prn(τn−nTc/4m)]in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?w(τ)=[prn(τn+nTc/2m)−prn(τn−nTc/2m)]in-line-formulae description="In-line Formulae" end="tail"?wherein c(τ) is a local replica of the BOC modulated pseudo-random noise code with delay τn, PRN(τ) is a replica of the unmodulated pseudo-random noise code, and a is a predetermined weight coefficient, andthe 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.

REFERENCES:
patent: 7486717 (2009-02-01), De Wilde et al.
patent: 7555033 (2009-06-01), Lillo et al.
patent: 2005/0270997 (2005-12-01), Julien et al.
patent: 2006/0285581 (2006-12-01), Mattos
patent: 2007/0274374 (2007-11-01), Abraham
patent: 2008/0069187 (2008-03-01), Chen et al.
patent: 1 681 773 (2006-07-01), None
Julien, O., M.E. Cannon, G. Lachapelle, C. Mongredien, and C. Macabiau (2004) “A New Unambiguous BOC(n,n) Signal Tracking Technique.” CD-ROM Proceedings of GNSS 2004 Conference, Rotterdam, Netherlands (May 16-19, 2004), 12 pages. http://plan.geomatics.ucalgary.ca/papers/04gnssrotterdamojulien.pdf.
European Patent Office, European Search Report, Application No. EP 06 42 5828, Apr. 13, 2007.
Fante, R.L., “Unambiguous Tracker for GPS Binary-Offset-Carrier Signals,” ION Annual Meeting, Jun. 23, 2003, pp. 141-145, XP002338821.

Affiliated with

Also associated with

Rating

Method and system for resolving the acquisition ambiguity... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for resolving the acquisition ambiguity..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for resolving the acquisition ambiguity... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2702830