UWB outdoor channel characterization and modeling based on measurements

摘要

This work reports on a characterization of the ultra wideband (UWB) outdoor channel based on a channel measurements over a frequency bandwidth of 9 GHz from 3 GHz to 9 GHz. Frequency domain measurements were conducted for line-of-sight (LOS) scenario. Firstly, obtained data measurement are characterized in terms of power distribution in both time and frequency domains. Results show that the power distribution is well fitted by Weibull distribution, and the path loss as well as the frequency dependence is characterized. Secondly, the wavelet-based denoising to improve the estimated Power Delay Profile (PDP) from Ultra Wideband UWB outdoor channel measurements was investigated. Furthermore, we investigated the second order statistics characterization of the indoor UWB measured channels through an Eigen decomposition of the auto-covariance matrix to determine the number of UWB channel DoF. In addition, we will look into the effect of the proposed denoising scheme on the UWB channel Eigen Properties.