Spectrum analysis of ultra-wide band signal based on Gaussian pulse

Since ultra-wideband impulse waveform is directly related to communication system characteristics, so it is essential to select the suitable method to generate ultra-wideband impulse waveform. This paper uses Gaussian pulse and its derivatives to get the expected pulse signal, then it can get the power spectrum density by simulating Gaussian pulse and its derivatives, putting forward to get the optimized waveform by means of linear combination, which also meets the emission mask standard. Then according to specific modulation signal, by analyzing the DS-UWB power spectrum density, thus making conclusion that the final expression is only determined by spread spectrum code and the code length. When the length increases, the resulting waveform of power spectrum density turns to be more smoothy and subject to approximates to the Gaussian waveform of basic pulse Fourier Transform.