Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-10-10
2006-10-10
Corrielus, Jean B. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S149000, C375S150000, C375S278000, C375S284000
Reexamination Certificate
active
07120192
ABSTRACT:
A synchronization establishing apparatus in a spectrum spread communication system, includes a search section that calculates correlation values from a received spectrum spread signal, and calculates power values and power addition values of the power values. Also, the search section selects larger ones of the power addition values to output together with timing data corresponding to the selected larger power addition values. One of the symbols and the power values is corrected in phase based on phase change quantities. A frequency offset estimating section estimates frequency offsets from one of the correlation values and the power values and demodulation timing data and calculates the phase change quantities from the estimated frequency offsets. A demodulation path selecting section selects path timings based on the selected larger power addition values and outputs the demodulation timing data to the frequency offset estimating section.
REFERENCES:
patent: 5361276 (1994-11-01), Subramanian
patent: 5432521 (1995-07-01), Siwiak et al.
patent: 5490165 (1996-02-01), Blakeney et al.
patent: 5579338 (1996-11-01), Kojima
patent: 5978411 (1999-11-01), Kitade et al.
patent: 6005889 (1999-12-01), Chung et al.
patent: 6094449 (2000-07-01), Komatsu
patent: 6219391 (2001-04-01), Nakano
patent: 6353642 (2002-03-01), Asahara et al.
patent: 6373882 (2002-04-01), Atarius et al.
patent: 6628700 (2003-09-01), Miura
patent: 1164151 (1997-11-01), None
patent: 1175171 (1998-03-01), None
patent: 2 668 671 (1992-04-01), None
patent: 2672769 (1997-07-01), None
patent: 2698506 (1997-09-01), None
patent: 2850959 (1998-11-01), None
patent: 11-88229 (1999-03-01), None
patent: 11-313382 (1999-11-01), None
patent: 97-700400 (1995-07-01), None
patent: 95-19666 (1995-07-01), None
Corrielus Jean B.
Foley & Lardner LLP
Ghulamali Qutub
LandOfFree
Spectrum spread communication synchronization establishing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spectrum spread communication synchronization establishing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectrum spread communication synchronization establishing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3715786