Intra-Vehicle UWB Channel Measurements and Statistical Analysis

Ultra-wideband (UWB) technique attracts attention from automotive manufacturers as a potential way to construct intra-vehicle wireless sensor network. This paper reports our preliminary effort in measuring and modeling the UWB propagation in the commercial vehicle environment. Two cases of time domain channel measurement results are reported. In one case, the antennas are inside the engine compartment. In the other case, both antennas are beneath the chassis. It is observed that clustering phenomenon exists in the former case but not in the latter one. Different channel models are used to describe UWB propagation in the two cases and model parameters are found by statistically analyzing the impulse responses.