Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-07-26
2005-07-26
Liu, Shuwang (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C140S149000, C140S147000, C370S331000, C370S342000
Reexamination Certificate
active
06922435
ABSTRACT:
Techniques to generate a pseudo-random number (PN) sequence at a desired phase using “masking” to adjust the phase of the PN sequence in coarse increments (e.g., 64-PN chip increments) to account for a large phase adjustment. Slewing may then be used to adjust the PN phase in fine increments (e.g., ⅛ PN chip increments) to obtain the desired phase. Prior to each scan for the pilot from a particular base station, a PN mask corresponding to a phase closest to the start of a new search window is applied to a PN generator to obtain an initial phase for the PN sequence. From the initial phase obtained by the applied mask, the PN generator is then slewed to the start of the search window. The masking can be used to obtain a large phase adjustment in less time, which is likely to improve search performance.
REFERENCES:
patent: 5790589 (1998-08-01), Hutchison et al.
patent: 6560212 (2003-05-01), Prasad et al.
patent: 6594680 (2003-07-01), Gu et al.
patent: 6639907 (2003-10-01), Neufeld et al.
patent: 6724738 (2004-04-01), Storm et al.
patent: 6735606 (2004-05-01), Terasawa et al.
patent: 0994573 (2000-04-01), None
patent: 9945670 (1999-09-01), None
Handojo Eric
Neufeld Arthur J.
Van Melle Ehren J. D.
Brown Charles D
Liu Shuwang
Pappas George C.
Qualcomm Inc
Wadsworth Philip R
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