Analysis of reflection of signal transmitted in low voltage power-line with complex wavelet

Recently the low voltage powerline telecommunication has become a hot research topic for electrical advancements. However, effective implementation of the high quality transmission signal over this network remains a difficult issue, because of some drawbacks such as unpredictable load effects, noise, high attenuation, reflection and resonance effects. Furthermore, because the reflection signal has the same frequency with the original one, it is difficult to identify the useful information from the receiving signal by general method. This paper aims to find out an effective method to deal with this problem. Since the reflection signal has a phase difference with the original one, we use complex wavelet transform to get the phase information and some other simple information. By this means, this paper also proposes two novel complex information by combining the simple information. Simulated applications by low voltage power line communication system show the effectiveness of the proposed method.