ELECTRIC POWER-LINE CARRIER COMMUNICATION DEVICE - NEC Mobile Communications Co., Ltd.

Title:

ELECTRIC POWER-LINE CARRIER COMMUNICATION DEVICE

Document Type and Number:

Japanese Patent JP3184119

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To transmit signals excluding the frequency band in a short circuit state with its impedance '0' by performing the communication only in the communication enable areas and excluding the communication unable frequency area of the electric power-line impedance among all frequency bands which are used in the electric power-like carrier communication.
SOLUTION: A transmitter side device controls a VCXO 302 from a CPU 20 via a linear sweep frequency generation part 30 and a voltage control circuit 301 and outputs the linear sweep frequency of 10 to 450 kHz to an electric power-line via an LPF 105 and an AC.I/F 106. A receiver side device receives the linear sweep frequency via the AC.I/F 106 to divide it by the matching filters 502-1 to 502-5 via a BPF 501 of an impedance frequency characteristic detection part 50 and outputs a reactive pulse in response to the corresponding linear sweep frequency. When the electric power-line impedance is set at 280 kHz or higher in a short circuit state, for example, the corresponding matching filters 502-4 and 502-5 output no reactive pulses to the distorted waveforms. Thus, the information data showing a short circuit are obtained.

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Inventors:

Kimihide Hiiragiyama

Application Number:

JP17039497A

Publication Date:

July 09, 2001

Filing Date:

June 26, 1997

Export Citation:

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