Time- and Frequency-Varying K-Factor of Non-Stationary Vehicular Channels for Safety-Relevant Scenarios


Vehicular communication channels are characterized by a non-stationary timeand frequencyselective fading process due to fast changes in the environment. We characterize the distribution of the envelope of the first delay bin in vehicle-to-vehicle channels by means of its Rician K-factor. We analyze the time-frequency variability of this channel parameter using vehicular channel measurements at 5.6 GHz with a bandwidth of 240 MHz for safety-relevant scenarios in intelligent transportation systems (ITS). This data enables a frequency-variability analysis from an IEEE 802.11p system point of view, which uses 10 MHz channels. We show that the small-scale fading of the envelope of the first delay bin is Rician distributed with a varying K-factor. The later delay bins are Rayleigh distributed. Manuscript received yyyyyyy.2014. L. Bernadó and T. Zemen (corresponding author) are with Forschungszentrum Telekommunikation Wien (FTW), Vienna, Austria (e-mail: bernado@ftw.at, thomas.zemen@ftw.at). F. Tufvesson is with the Department of Electrical and Information Technology, Lund University, Lund, Sweden (e-mail: Fredrik.Tufvesson@eit.lth.se). C. F. Mecklenbräuker is with the Institut of Telecommunications, Technische Universität Wien, Vienna, Austria (e-mail: cfm@nt.tuwien.ac.at). A. F. Molisch is with the Department of Electrical Engineering, University of Southern California, Los Angeles, CA, USA (e-mail: molisch@usc.edu). This research was supported by the project NOWIRE funded by the Vienna Science and Technology Fund (WWTF), the project NFN SISE (S10607) funded by the Austrian Science Fund (FWF) as well as the strategic FTW project I-0. FTW is supported by the Austrian Government and the City of Vienna within the competence center program COMET. The research work described in this paper was carried out in cooperation with the COST Action IC1004 on Cooperative Radio Communications for Green Smart Environments. Part of this research has been presented in the IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), 2010. April 28, 2014 DRAFT ar X iv :1 30 6. 39 14 v3 [ cs .N I] 2 5 A pr 2 01 4

DOI: 10.1109/TITS.2014.2349364

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@article{Bernad2015TimeAF, title={Time- and Frequency-Varying K-Factor of Non-Stationary Vehicular Channels for Safety-Relevant Scenarios}, author={Laura Bernad{\'o} and Thomas Zemen and Fredrik Tufvesson and Andreas F. Molisch and Christoph F. Mecklenbr{\"a}uker}, journal={IEEE Trans. Intelligent Transportation Systems}, year={2015}, volume={16}, pages={1007-1017} }