Performance of wavelet OFDM in underground coal mine PLCs

In this paper, the channel of the Underground Coal Mine(UCM) PLCs is analysis, which indicates the UCM PLCs is more complex than home PLCs and this channel can be described with multipath characteristics and strong noise interference characteristics. Accurate modulation should be adopted. Conventional OFDM and Wavelet OFDM are compared by focusing on two important aspects: transmission efficiency and spectral leakage. It will be shown that, for the case of the UCM power line channel, Wavelet OFDM offers substantial advantages over conventional OFDM. Wavelet OFDM is proposed to use in UCM PLCs. © 2008 IEEE.