Inbound communications using electricity distribution network

Details Inbound communications using electricity distribution network Inbound communications using electricity distribution network

1991-12-17

1993-11-16

Crosland, Donnie L.

Communications: electrical

Systems

Selsyn type

340310A, 375 37, H04B 300, H04L 2700

Patent

active

052627551

ABSTRACT:
Signals carried inbound on an electricity distribution network are detected by extracting electrical current information from a waveform of the electricity distribution network, and digitally filtering the electrical current information, thereby forming a digital waveform, to extract signal information contained in the electrical current information. A reference waveform is constructed from a portion of the digital waveform, and the signal information is detected by comparing portions of the digital waveform with corresponding portions of the reference waveform.

REFERENCES:
patent: 4106007 (1978-08-01), Johnston et al.
patent: 4218655 (1980-08-01), Johnston et al.
patent: 4963853 (1990-10-01), Mak
patent: 4988972 (1991-01-01), Takagi
patent: 4996513 (1991-02-01), Mak et al.

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