The single pulse mode of IRUWB can affect the single pulse mode to the power spectral density of the transmitted signal, the single pulse mode selection should follow the principles that high spectrum efficiently, interference suppression flexible pulse generator easy. For information on data modulation are mainly based on the amplitude modulation (PAM) and based on delayed phase modulation (PPM), when the main multiple access technologies hop (TH) spread spectrum modulation, direct sequence (DS) spread spectrum modulation, most the main two basic modulation is THPPM and DSPAM. Gaussian pulse, the pulse waveform modulation, timehopping technology, direct spread spectrum technology together to form a new hybrid modulation DSTHPSM modulation.