Pulse or digital communications – Receivers
Reexamination Certificate
2005-12-20
2005-12-20
Liu, Shuwang (Department: 2634)
Pulse or digital communications
Receivers
C375S322000, C375S365000, C375S319000, C714S822000, C714S797000
Reexamination Certificate
active
06977969
ABSTRACT:
There is provided a digital data receiver for recovering at least one message word signal from a digital data frame. The digital receiver includes a digital FM demodulator for receiving frequency modulated signals, and for demodulating a dotting sequence signal, a word sync signal and a message word signal of each sub-frame which is in digital data frame, a dotting detector for detecting a dotting sequence signal of at least one sub-frame among the signals demodulated by the digital FM demodulator, based upon a predetermined signal which is shorter than the length of each dotting sequence signal of the each sub-frame, detecting means for determining the termination of receiving of the digital data frame after the dotting detector detects the dotting sequence signal, and for detecting a new digital data frame followed by the digital data frame; and a message processor means for recovering a message word signal in the digital signal frame which is related to the dotting sequence signal detected by the dotting detector. A method for recovering at least one message word signal from a digital data frame is also disclosed.
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Kim Sung-joo
Kim Young-Jin
Lee Kyung-Ha
Dilworth & Barrese LLP
Liu Shuwang
Samsung Electronics Co,. Ltd.
Zheng Eva
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