Modeling of UWB Channel With Population Density in Indoor LOS Environments

This letter deals with the effect of multiple human bodies on an ultrawideband (UWB) channel in indoor line-of-sight (LOS) environments. To assess this, we choose four environments and consider four scenarios that have a different number of people in each environment. A distance-dependent path-loss model, a frequency-dependent path-lossmodel, and time dispersion parameters are considered. We found that the distance-dependent pathloss exponent increases as population density increases, while the frequency-dependent path-loss exponent decreases. The time dispersion parameters decrease as population density increases. The results suggest that the effect of the presence of people on UWB channels should be considered when assessing the performance of UWB systems.