Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2002-06-13
2008-08-19
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S348000, C375S327000, C375S371000
Reexamination Certificate
active
07415081
ABSTRACT:
Reception timing of a signal consisting of a valid symbol section and a guard interval section is controlled properly. According to a result of auto-correlation calculation performed by a guard correlation processor, a timing adjustment block generates a control voltage for adjusting the reception timing of the valid symbol section. A first and a second loop filter filter the control voltage signal generated by the timing adjustment block and sends it to a switch. An inter-symbol interference decision block decides whether an inter-symbol interference is generated according to the result of the auto-correlation calculation performed by the guard correlation processor, and controls the switch according to the decision result. Where, in the first loop filter, a comparatively large gain is set while in the second loop filter, a comparatively small gain is set.
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Okuhata Yasuhide
Shinoda Atsushi
Fan Chieh M.
Fotakis Aristocratis
Kabushiki Kaisha Kenwood
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
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