Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-12-20
2011-11-22
Payne, David C. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C324S076330, C340S426190, C340S539130, C342S108000, C342S378000, C359S306000, C367S040000, C701S213000, C701S215000
Reexamination Certificate
active
08064500
ABSTRACT:
A coherent integration section synthesizes an IF signal stored in a memory and a C/A code replica generated by a code generation section using a mixer to calculate a correlation value, and integrates the correlation value using an integration section. An integration count monitoring section counts the integration count of the integration section. When a saturation control section has detected saturation of integration of the correlation values, the integration count monitoring section causes the integration section to suspend integration when the integration count is equal to or less than a reference count, and allows the integration section to continue integration when the integration count has exceeded the reference count.
REFERENCES:
patent: 5576715 (1996-11-01), Litton et al.
patent: 6157341 (2000-12-01), Silvestrin et al.
patent: 7180446 (2007-02-01), Wang et al.
patent: 2003/0081661 (2003-05-01), Stein et al.
patent: H11-242075 (1999-09-01), None
DSouza Adolf
Global IP Counselors, LLP
Payne David C.
Seiko Epson Corporation
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