Analyse de sous espaces propres, basee sur des mesures a l’interieur des batiments, d’un canal radio ultra large bande

This work aims at characterizing the second order statistics of indoor Ultra-Wideband (UWB) channels using channel sounding techniques. We present measurement results for different scenarios conducted in a laboratory setting at Institut Eurecom. These are based on a eigen-decomposition of the channel autocovariance matrix, which allows for determining the growth in the number of significant degrees of freedom of the channel process as a function of the the signaling bandwidth. We show empirical eigenvalue distributions as a function of the signal bandwidth for both line-of-sight and non line-of-sight situations. Furthermore, we give the cumulative distribution function for the channel energy and the evolution of the number of eigenvalues as a function of the signal bandwidth.