Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2005-02-01
2005-02-01
Chin, Stephen (Department: 2634)
Pulse or digital communications
Receivers
Angle modulation
C375S149000, C375S355000, C375S326000, C375S240010, C600S453000
Reexamination Certificate
active
06850576
ABSTRACT:
A base band signal is sampled, based on an asynchronous sampling clocking, to output two sampled data series. A transmission side complex symbol frequency generator generates a complex transmission symbol frequency component combining an envelope value and an amplitude change amount value, which are each calculated from the two sampled data series. The transmission side complex symbol frequency component is provided to a correlation value calculator that outputs a correlation data series correlated to the complex symbol frequency and the symbol frequency generated by a cosine wave generator. The correlation data series is converted a timing error by an inverse tangent calculator. By the above configuration, a timing reproducing unit, which includes the above components, determines the timing error at a sampling speed of twice the symbol rate.
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Fujimura Akinori
Kojima Toshiharu
Okubo Seiji
Chin Stephen
Mitsubishi Denki & Kabushiki Kaisha
Pathak Sudhanshu C.
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