Talks and Poster Presentations (with Proceedings-Entry):
L. Bernadó, T. Zemen, J. Karedal, A. Paier, A. Thiel, O. Klemp, N. Czink, F. Tufvesson, A. Molisch, C. Mecklenbräuker:
"Multi-Dimensional K-Factor Analysis for V2V Radio Channels in Open Sub-urban Street Crossings";
Talk: International Symbosium on Personal, Indoor and Mobile Comunication 2010 (PIMRC 2010),
- 09-29-2010; in: "Proceedings of PIMRC 2010",
In this paper we analyze the Ricean K-factor for vehicle-to-vehicle (V2V) communications in a typical open suburban street crossing. The channel conditions vary from non line-of sight (NLOS) to line-of-sight (LOS). The antenna arrays used for recording the radio channels consist of 4 elements with directional radiation patterns. We measured 16 individual single-input single-output channels, with a bandwidth of 240MHz for a duration of 20 s. We performed two kind of evaluations. For the first analysis we partitioned the 240MHz bandwidth into 24 sub-bands with 10MHz each, according to 802:11p. The small-scale fading of the first delay bin is Ricean distributed with a time-varying K-factor. The later delay bins are mostly Rayleigh
distributed. We observe that the large/small K-factor values are not necessarily correlated with the received power. We show that the K-factor can not be assumed to be constant in time, frequency, and space. The antenna radiation patterns, and the illuminated objects by them at different time instances are the cause of these variations. The second evaluation considers the 240MHz bandwidth, and the narrow-band K-factor is calculated for each frequency bin, with delta f = 312 kHz. We corroborate the need to consider the frequency variation of the K-factor. We conclude that a multi-dimensional varying K-factor models the large-scale statistical behaviour more accurately than a constant K-factor.
channel measurements, vehicular communications, radio channel characterization
Electronic version of the publication:
Created from the Publication Database of the Vienna University of Technology.