Ultra-Wideband Impulse-Radio Propagation for In-Vehicle Wireless Link

In-vehicle ultra-wideband impulse-radio propagation characteristics are investigated experimentally for two types of vehicle, sedan and one-box, and the effects of in-vehicle antenna locations and passengers on propagation characteristics are discussed where four frequency spans of 1, 3, 5 and 7 GHz are considered. From the measurement results, these delay spreads are 1~5 and 4~8 nsec respectively and the effect of passengers are found to be relatively small.