Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2004-12-22
2008-08-12
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S145000, C375S143000, C375S149000, C375S152000, C375S316000
Reexamination Certificate
active
07412014
ABSTRACT:
An A-D conversion unit performs analog-to-digital conversions on baseband signals. A correlation processing unit carries out a correlation processing. A power computing unit computes the power of correlation values. An inter-signal condition determining unit compares a relationship between the peak of a main signal and the peak of sub-signals to a first condition, and excludes, from combining diversity, baseband signals corresponding to the sub-signals if the relationship does not satisfy the first condition. An intra-signal condition determining unit30compares the main signals and sub-signals to a second condition, respectively, and excludes signals from combining diversity if the signals do not satisfy the second condition. A timing adjusting unit adjusts the timing of sub-signals so that the timing thereof comes close to the timing of the main signal. A shift unit shifts the timing of sampled signals corresponding to the sub-signals.
REFERENCES:
patent: 6377613 (2002-04-01), Kawabe et al.
patent: 6711221 (2004-03-01), Belotserkovsky et al.
patent: 6731622 (2004-05-01), Frank et al.
patent: 7054353 (2006-05-01), Ostman et al.
patent: 8-046659 (1996-02-01), None
Higashida Nobuo
Nakao Seigo
Fan Chieh M.
Lee Siu M
McDermott Will & Emery LLP
NTT Data Sanyo System Corporation
Sanyo Electric Co,. Ltd.
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