COMMUNICATION DEVICE

PROBLEM TO BE SOLVED: To provide a communication device which can perform communication not affected by noise with an inexpensive configuration by removing the power source harmonic noise without performing conventional filtering.SOLUTION: The power source harmonic noise N has a frequency equal to a...

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Bibliographic Details
Main Authors KIMURA NORIAKI, EMORI TAKASHI
Format Patent
LanguageEnglish
Published 23.08.2012
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION
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Summary:PROBLEM TO BE SOLVED: To provide a communication device which can perform communication not affected by noise with an inexpensive configuration by removing the power source harmonic noise without performing conventional filtering.SOLUTION: The power source harmonic noise N has a frequency equal to an integer times of the commercial frequency fof 50 Hz. The frequency fof a subcarrier carrying a transmission signal is thereby set to a value between the power source harmonic noise frequencies equal to integer times of 50 Hz, e.g. 25 Hz and a value equal to an integer times thereof. When signal communication is performed while setting orthogonal relationship between the signal frequency (subcarrier frequency) and the frequency of power source harmonic noise, the communication signal can be taken out while being separated easily from the power source harmonic noise, and can be demodulated while removing the power source harmonic noise very accurately.
Bibliography:Application Number: JP20110021351