Wavelet-OFDM Signal Transmission Characteristics with High-Speed PLC Modem

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  • 高速PLCモデムを用いたWavelet-OFDM信号伝送特性に関する研究
  • コウソク PLC モデム オ モチイタ Wavelet OFDM シンゴウ デンソウ トクセイ ニ カンスル ケンキュウ

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Abstract

In this paper, we measured the interference immunity characteristics of high-speed PLC system using Wavelet-OFDM when the narrowband conducted interference wave signal was injected. As the results, it was clear that (1) measured PHY rate at the all frequency band hardly decreased in C/I (Carrier to Interference ratio) of above 20dB, but began to decrease rapidly in C/I of below 0dB when the interference signal was injected in the frequency band of high-speed PLC signal, (2) when C/I became from 0dB to -20dB, the measured PHY rate at the frequency existing the notch band were improved around 10Mbps than that at the frequency not existing the notch band, (3) when the narrowband interference wave was injected outside of frequency band of high-speed PLC signal, the measured PHY rate did not decrease than that in each notch band. Therefore, it was revealed that high-speed PLC system using Wavelet-OFDM had good interference immunity characteristics.

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