International audience—Recent telecommunication systems exploit the degrees of freedom of the radio propagation channel more and more. Deeper investigations of system performance require realistic channel models. For this purpose, a new MIMO UWB channel sounder is introduced. The novelty is its capacity to estimate simultaneously direction of arrival and departure in 3D, including polarization state information. The second novelty is a new and faster algorithm to estimate the multipath properties of the propagation channel. An extensive measurement campaign is performed in different residential environments and statistical results are provided. Index Terms—Channel models, direction of arrival estimation, radio propagation, ultra wideband te...