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This paper proposes the simple method of synthesis design for generating UWB pulse based on wavelet. This study considers the characteristics of Haar wavelet, which are digital and simple method for synthesizing. By using discrete wavelet transform, the synthesis signal is similar with mother signal and simple to implement. In our study, the modulated Gaussian waveform is involved as the UWB pulse for synthesizing. The synthesis signal method based on Haar wavelet which is the mother wavelet is presented. Moreover, the comparison for the performance between the mother signal and the synthesis signal on the additive white Gaussian noise (AWGN) channel are given.