Simulation and analysis of indoor propagation characteristics for UWB based on TD-UTD

In this paper, the propagation characteristics of UWB signal in the typical indoor complex environment are discussed based on the time-domain uniform theory of diffraction (TD-UTD). Some propagation parameters are analyzed by considering of multipath propagation mechanisms including direct ray, reflection, diffraction and transmission, such as received waveform, power delay profile, distribution of the direction angle of arrival and so on. The results show that: (1) Horizontally polarized rays contribute more energy than vertically polarized rays. (2) For the given environment, the high order reflection are weak and can be ignored. (3) The statistical distribution of arrival angle in the complex indoor environment have demonstrated that in order to improve the efficiency of the receiving point, the vertical polarization antenna is recommended. These results provide the theoretical basis for wireless communication network coverage and optimization of UWB signal in the complex environment of indoor.