Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2003-01-03
2008-03-11
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S354000, C375S359000, C327S141000
Reexamination Certificate
active
07342953
ABSTRACT:
A synchronization detection circuit includes: a matched filter105for outputting a correlation value, between a spreading code and data that is obtained by sampling a code spread signal101, using a sampling clock for one chip cycle; a sampling clock generator102for generating the sampling clock, so that, for each cycle of a code spreading signal, a phase delay for the basic clock of one chip cycle is increased by a value obtained by dividing one chip cycle by an integer; and a synchronization determination unit107for determining the timing whereat the maximum correlation value is attained and for performing synchronization detection.
REFERENCES:
patent: 5508708 (1996-04-01), Ghosh et al.
patent: 5790590 (1998-08-01), Shou et al.
patent: 5903595 (1999-05-01), Suzuki
patent: 6064688 (2000-05-01), Yanagi
patent: 6236696 (2001-05-01), Aoki et al.
patent: 6522366 (2003-02-01), Onodera et al.
patent: 2006/0161370 (2006-07-01), Jiang et al.
patent: 1052355 (2000-05-01), None
patent: 1-319341 (1989-12-01), None
patent: 5-175938 (1993-07-01), None
patent: 10-56404 (1998-02-01), None
patent: 10-173485 (1998-06-01), None
patent: 10-257018 (1998-09-01), None
patent: 11-191746 (1999-07-01), None
patent: 11-261442 (1999-09-01), None
patent: 2000-307479 (2000-02-01), None
patent: 2000-174661 (2000-06-01), None
patent: P2000-252870 (2000-09-01), None
patent: P2000-269855 (2000-09-01), None
Japanese Office Action issued in Japanese Patent Application No. 2002-427402, dated Apr. 18, 2007.
Ejaz Naheed
Fan Chieh M.
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
LandOfFree
Synchronization detection circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronization detection circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronization detection circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3975928