Better subcarrier bases for powerline communication system |
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| Authors: | LI Jiao-jun LI Heng SU Li-yun and LI Gang |
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| Institution: | School of Electronic Information and Automation, Chongqing 400050, P.R. China;School of Electronic Information and Automation, Chongqing 400050, P.R. China;School of Mathematics and Physics, Chongqing University of Technology, Chongqing 400050, P.R. China;School of Electronic Information and Automation, Chongqing 400050, P.R. China |
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| Abstract: | To solve the frequency dispersive feature in powerline channel, the quthors analyzed the anti-interference performance of modulation schemes with different subcarrier bases, and use orthogonal wavelet packet as subcarrier base instead of sine base in OFDM to suppress multi-path effect and frequency selective fading by its orthogonality in powerline channel. Through experiment, performances of wavelet packet modulation with different wavelet packets and OFDM are analyzed. Experiment results indicate that when the SNR has reached a certain level, orthogonal wavelet packet modulation has better performance than bi-orthogonal wavelet packet and sine base. |
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| Keywords: | powerline communication subcarrier bases wavelet packet modulation orthogonal frequency division multiplexing |
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