Publications in Scientific Journals:
L. Bernadó, T. Zemen, F. Tufvesson, A. Molisch, C. Mecklenbräuker:
"Delay and Doppler Spreads of Non-Stationary Vehicular Channels for Safety Relevant Scenarios";
IEEE Transactions on Vehicular Technology,
Vehicular communication channels are character- ized by a non-stationary time- and frequency-selective fading process due to rapid changes in the environment. The non- stationary fading process can be characterized by assuming local stationarity for a region with finite extent in time and frequency. For this finite region the wide-sense stationarity and uncorrelated-scattering (WSSUS) assumption holds approx- imately and we are able to calculate a time and frequency dependent local scattering function (LSF). In this paper, we estimate the LSF from a large set of measurements collected in the DRIVEWAY´09 measurement campaign, which focuses on scenarios for intelligent transportation systems. We then obtain the time-frequency-varying power delay profile (PDP) and the time-frequency-varying Doppler power spectral density (DSD) from the LSF. Based on the PDP and the DSD, we analyze the time-frequency-varying root mean square (RMS) delay spread and the RMS Doppler spread. We show that the distribution of these channel parameters follows a bi-modal Gaussian mixture distribution. High RMS delay spread values are observed in situations with rich scattering, while high RMS Doppler spreads are obtained in drive-by scenarios.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Project Head Christoph Mecklenbräuker:
Christian Doppler Lab "Funktechnologien für nachhaltige Mobilität"
Created from the Publication Database of the Vienna University of Technology.