Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2011-03-22
2011-03-22
Tran, Khai (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
Reexamination Certificate
active
07912139
ABSTRACT:
Provided is a multi-carrier communication apparatus, power line communication circuit, and multi-carrier communication method capable of decreasing omission of carrier detection even when a plurality of communication apparatuses are simultaneously transmitting signals at the state of time discord. Digital signals transmitted from a digital signal-processing unit1are converted into analog signals by an analog circuit unit2and then transmitted from a pair of lines61and62via a communication transformer3. The digital signal-processing unit1has a frequency carrier detecting unit10which detects the existence of a carrier on the basis of a frequency characteristic of the received signal and the frequency carrier detecting unit10detects the carrier by taking correlation between sub-carriers adjacent to each other at every other interval.
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Ichihara Fumio
Kodama Nobutaka
Koga Hisao
Oishi Mutsuhiko
Yukizane Ryota
Dickinson Wright PLLC
Panasonic Corporation
Tran Khai
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