Communication over power lines

Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy

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340538, 34031001, H04M 1100

Patent

active

054523443

ABSTRACT:
The present invention describes an FSK carrier communication systems for transmitting and receiving data on a electric utility line even in the presence of extreme noise. The present invention uses a unique FSK transmit and receive protocol to distinguish between noise and actual data. By careful selection of the space and mark frequencies transmitted on the power line and by using a unique variable width data-bit protocol, the receiver can distinguish between actual data and corrupted information due to noise spikes with nearly error free communication.

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