Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2005-10-25
2005-10-25
Fan, Chieh M. (Department: 2634)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S150000
Reexamination Certificate
active
06959053
ABSTRACT:
A method of searching for a predefined code in a bit stream, the method comprising initiating a first search for correlation of the bit stream with a reference code applied to the bit stream at a first plurality of different times according to a first resolution to produce a first set of correlation values and associated times. Then a second search is initiated for correlation of the bit stream with the reference code applied to the bit stream at a second plurality of different times to produce a second set of correlation values and associated times, the reference code being offset in time from a maximal correlation value of the first set such that the reference code is applied to the bit stream at times other than times of the first plurality. Then, out of the first and the second sets a maximal correlation value is selected for use in calculating a strength of the predefined code in the bit stream.
REFERENCES:
patent: 5440597 (1995-08-01), Chung et al.
patent: 5592518 (1997-01-01), Davis et al.
patent: 5781543 (1998-07-01), Ault et al.
patent: 5805648 (1998-09-01), Sutton
patent: 6175561 (2001-01-01), La Rosa et al.
patent: 6434185 (2002-08-01), Struhsaker et al.
patent: 6775318 (2004-08-01), Chen et al.
patent: 0880238 (1998-11-01), None
patent: WO 0239607 (2002-05-01), None
Vitterbi, A.J.; Alison Wesley; “CDMA—Principles of Spread Spectrum Communications”; Section 3.4.3, 1995.
Moon, Hichan; Sangburn Kim; “Performance of Double Dwell Acquisition with Continuous Integration Detector in DS-CDMS System”; IEEE Vehicular Technology Conference, v. 3, pp. 2507-2511, May 18-21, 1998.
Park, Hyung-Rae; “Performance Analysis of a Double-Dwell Serial Search Technique for Cellular CDMA Networks in the Case of Multiple Pilot Signals”; IEEE Transactions on Vehicular Technology, v. 48 n. 6, pp. 1819-1830, Nov. 1, 1999.
Long, Biqi; Hichan Moon; “Detection and False Alarm Probability of PN Code Acquisition in DS-CDMA System”; IEE Electronics Letters, v. 33 n 11, pp. 926-928, May 22, 1997.
Lee, William C.Y.; “Mobile Communications Engineering”; McGraw-Hill, Section 1.5, 1982.
Burchill William
Gerhards Ronald H.
Vos Gus
Fan Chieh M.
Waxler Aaron
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