Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-05-10
2005-05-10
Chin, Stephen (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S130000, C375S142000, C375S143000, C375S152000
Reexamination Certificate
active
06891884
ABSTRACT:
An apparatus is provided for detecting a correlation of samples with a spread code comprising: an L-chip accumulator which inputs the samples to generate and output an intermediate correlation signal; M memories, each of which stores L×M samples of the intermediate correlation signal; an adder which has input terminals as many as M and inputs from each of the input terminals the intermediate correlation signal which is outputted from the L-chip accumulator or the intermediate correlation signal which is outputted from a corresponding memory among the memories; and a controller which supplies the intermediate correlation signal outputted from the L-chip accumulator to the memories as many as M and to the M input terminals of the adder in rotation with a unit of L×N samples, and reads, and supplies to each of the input terminals of the adder, the intermediate correlation signal which has been stored in each of the memories M−1 times; wherein an output of the adder is outputted as an correlation signal outputted from the apparatus.
REFERENCES:
patent: 5903595 (1999-05-01), Suzuki
patent: 6118808 (2000-09-01), Tiemann et al.
patent: 6345069 (2002-02-01), Dabak et al.
patent: 08-172342 (1996-07-01), None
patent: 9-55715 (1997-02-01), None
patent: 10-32560 (1998-02-01), None
patent: 2778396 (1998-05-01), None
patent: 10-173485 (1998-06-01), None
patent: 10-178334 (1998-06-01), None
patent: 10-322308 (1998-12-01), None
patent: 10-327126 (1998-12-01), None
patent: 2000-124836 (2000-04-01), None
patent: 2000-174661 (2000-06-01), None
patent: 2000-196498 (2000-07-01), None
patent: 2000-252869 (2000-09-01), None
patent: WO9906922 (1999-02-01), None
Hideshi, Murai, Patent Abstracts of Japan; Publication No. 06077931 Mar. 18, 1994, Receiver for Spread Spectrum Signal.
Chin Stephen
NEC Electronics Corporation
Odom Curtis
LandOfFree
Apparatus for detecting correlation, spectrum despread... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for detecting correlation, spectrum despread..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for detecting correlation, spectrum despread... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3406124