Abstract: In this paper, UWB technology for high speed wireless transmission in indoor environment is introduced, and then the performance is analyzed and compared when it is applied to high-speed wireless transmission in indoor environments, including shape of impulse, modulation methods, multi-access technology, characterization of UWB channel in indoor environments, and structure of UWB communication system for time-hoping pulse position modulation(TH-PPM) method. at last, it concludes that the performance is good and realization is easy for UWB with pulse position modulation, gauss waveform and TH technology.