The Temporal Variation of Indoor Ultra-Wideband Channel

Ultra-wideband (UWB) technology offers promising solution for future indoor high speed low power wireless communications. The development and design of the UWB systems require detailed characterization of UWB indoor channels, and much work has been reported in the literature. However, the temporal variation induced by people´s motion in the vicinity of the transceiver has been scarcely investigated. This paper presents the results of extensive measurements and analysis of the temporal variations of UWB indoor radio propagation channel. Impulse based time domain measurements were carried out and the measurement campaign was conducted in diversified environments in a modern office building, consisting of office, hallway and lobby scenarios. Signal strength fluctuation, time correlation coefficient and Doppler spread are derived from the analysis of the measured data. Moreover, the results emphasize the difference of the temporal fluctuation between UWB and narrow band indoor channels.