Study on Wavelet Transformation: Used by OFDM in Power Plant

The electromagnetic environment of the main features in power plants is analyzed, and then the communication system based on OFDM technology was put forward in this paper, the way of selection the wavelet bases function to pass the signal communication system is discussed in the last. The system uses OFDM technology to remove the signal noise in which the cosine carriers of the conventional OFDM system are replaced by the multi-scale orthogonal wavelets transformation, and proposed the use of multi-carrier data transmission strategy, using data classification sub-carrier transmission according to the purpose and nature of the data, the sub-carrier independent of each other. This system exploits the advantage of OFDM, such as strong anti-interference. We compared the typical wavelet basses in practical application, analyzed the effects of the orthogonal bases and its character of orthogonality, compactly supported and vanishing moments in system. The common method for choosing wavelet bases, how to calculate future and direction of development is pointed out.