Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2008-05-13
2008-05-13
Corrielus, Jean B. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S149000
Reexamination Certificate
active
07372892
ABSTRACT:
A simple and robust CTL is used for time tracking of multipath components of a spread spectrum signal transmitted over a wireless multipath fading channel. A digital code-tracking loop includes the implementations of despreading early and late data samples by use of a pseudonoise sequence, an error signal output generated by the despreading, and adjustment for a plurality of on-time, early and late samples, a data rate of a control signal provided as a fractional proportion of a data rate of error signals.
REFERENCES:
patent: 5192957 (1993-03-01), Kennedy
patent: 5414729 (1995-05-01), Fenton
patent: 5574721 (1996-11-01), Magill
patent: 5659573 (1997-08-01), Bruckert et al.
patent: 5818887 (1998-10-01), Sexton et al.
patent: 6272168 (2001-08-01), Lomp et al.
patent: 6693951 (2004-02-01), Gilhousen et al.
patent: 2002/0009064 (2002-01-01), Blessent et al.
patent: 2002/0018518 (2002-02-01), Subramanian et al.
patent: 2002/0101912 (2002-08-01), Phelts et al.
patent: 2003/0081703 (2003-05-01), Kawaguchi et al.
patent: 10-294717 (1998-11-01), None
patent: 11-150524 (1999-06-01), None
patent: 2001-069039 (2001-03-01), None
patent: 2002-111537 (2002-04-01), None
patent: 96/21294 (1996-07-01), None
patent: 97/28608 (1997-08-01), None
patent: 99/23770 (1999-05-01), None
Gardner et al. “Interpolation in Digital Modems-Part I: Fundamentals.” IEEE Transactions on Communications, vol. 41, No. 3, Mar. 1993, pp. 501-507.
Erup et al. “Interpolation in Digital Modems-Part II: Implementation and Performance.” IEEE Transactions on Communications, vol. 41, No. 6, Jun. 1993, pp. 998-1008.
De Gaudenzi et al. “A Digital Chip Timing Recovery Loop for Band-Limited Direct-Sequence Spread-Spectrum Signals.” IEEE Transactions on Communications, vol. 41, No. 11, Nov. 1993, pp. 1760-1769.
Hart et al. “Performance Degradation Due to Code Tracking Errors in Spread-Spectrum Code-Division Multiple-Access Systems.” IEEE Journal on Selected Areas in Communications, vol. 14, No. 8, Oct. 1996, pp. 1669-1679.
De Gaudenzi et al. “Direct-Sequence Spread-Spectrum Chip Tracking in the Presence of Unresolvable Multipath Components.” IEEE Transactions on Vehicular Technology, vol. 48, No. 5, Sep. 1999, pp. 1573-1583.
Corrielus Jean B.
InterDigital Technology Corporation
Volpe and Koenig P.C.
LandOfFree
Simple and robust digital code tracking loop for wireless... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Simple and robust digital code tracking loop for wireless..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simple and robust digital code tracking loop for wireless... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2815573