Power line communication device

Patent metadata

Field	Value
Publication number	US-11146309-B2
Application number	US-201916719452-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Dec 28, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

The power line communication device detects inverter noise from the voltage waveforms of the power line, and executes the output of the transmission signal in a period in which it is determined that the signal amplitude of the transmission signal in the transmission processing unit exceeds a predetermined value from the output amplitude of the inverter noise, and stops the output of the transmission signal in other periods.

First claim

What is claimed is:

1. A power line communication device comprising:
an inverter noise detection processing unit for detecting inverter noise by a DC/AC inverter of the power line;
a half-wavelength shift processing unit for generating a half-wavelength shift signal in which a phase corresponding to a half-wavelength of the inverter noise is shifted with respect to a received signal from the power line;
an addition unit for generating an addition signal in which the received signal and the half-wavelength shift signal are added;
a reception processing unit for acquiring received data based on the addition signal;
a transmission processing unit for generating a transmission signal to be output to a power line based on the received data acquired by the reception processing unit;
a transmission position determination unit for determining a transmission period of the transmission signal based on the half-wavelength of the inverter noise; and
an output unit for outputting the transmission signal in the transmission period.

2. The power line communication device according to claim 1 ,
wherein a first period corresponding to the half-wavelength of the inverter noise is determined as the transmission period.

3. The power line communication device according to claim 1 , further comprising:
a noise waveform storage device for retaining a waveform substantially containing a large amount of inverter noise,
wherein the half-wavelength shift processing unit generates the half-wavelength shift signal by shifting a phase corresponding to a half-wavelength of the inverter noise with respect to a waveform substantially containing a large amount of inverter noise, and
wherein the half-wavelength shift processing unit removes frequency components of the received signal from the inverter noise.

4. The power line communication device according to claim 2 , wherein the same transmit signals as the first period are outputted in a second period corresponding to a half-wavelength of the inverter noise, which is consecutive to the first period.

5. The power line communication device according to claim 4 , further comprising:
a reception position determination unit for determining a reception period of the reception signal; and
an input unit for inputting the reception signal in the reception period; and
a reception processing unit for acquiring reception data based on an input signal from the input unit,
wherein the reception position determination unit determines a period corresponding to a second period as the reception period.

Assignees

• Renesas Electronics Corp

Inventors

• Shibuya Kosuke
• Shibuya Yoshitaka

Classifications

• H04B3/54 Primary

  Systems for transmission via power distribution lines · CPC title

• H04B3/46

  Monitoring; Testing · CPC title

• H04B3/546 Primary

  Combination of signalling, telemetering, protection (circuits for remote indication of supply or distribution network condition H02J13/00) · CPC title

• H04B3/06 Primary

  by the transmitted signal · CPC title

• H04B3/544

  Setting up communications; Call and signalling arrangements · CPC title