| Multi-wavelet is a natural generation of scalar wavelet. Based on the wavelet analysis , Multi-wavelet is proposed for its advance characteristics and the special algorithm structure comparing with the traditional wavelet. In this thesis,a new method of signal de-noising is presented based on multi-wavelet transform. The related functions of the method are investigated by numerical simulation with examples of typical multi-wavelet. The results show us that the method is reliable and for the analysis of many kinds of signals with the advantage of a strong de-noising.In this paper, for noise reduction of OFDM mobile communication system, signal preprocessing methods are given based on multi-wavelet transform. And the best de-noising system of OFDM is given by several preprocess simulations.Finally, TMS320VC5402 DSP platform as proposed OFDM-based system implementation of multi-wavelet noise reduction program, the program summarizes the various application devices. |
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