On the Spatial and Temporal Degrees of Freedom of UWB Communications

Ultra-Wide Band (UWB) was presented as a promising radio technology. Because of their large bandwidth, UWB networks are supposed able to deliver high data rates at short ranges. But after analyzing measurements many works observed saturation of the number of channel Degrees of Freedom (DoF) versus bandwidth. This motivates the work presented in this paper where we focus on sub space behavior to analyze the relationship between spatial and temporal resolution for UWB channel. This work presents also a study of the UWB propagation mechanism and its impact on the limitation of the maximum number of channel degrees of freedom.