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Multi-dimensional K-factor analysis for V2V radio channels in open sub-urban street crossings

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Author

  • Laura Bernadó
  • Thomas Zemen
  • Johan Kåredal
  • Alexander Paier
  • Andreas Thiel
  • Oliver Klemp
  • Nicolai Czink
  • Fredrik Tufvesson
  • Andreas Molisch
  • Christoph Mecklenbräuker

Summary, in English

In this paper we analyze the small-scale fading statistics for vehicle-to-vehicle (V2V) communications in a typical open sub-urban street crossing. The two cars approach the crossing from two different streets and the channel conditions vary from non line-of sight (NLOS) to line-of-sight (LOS). 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. The antenna arrays used for recording the multiple-input multiple-output channels are linear and consist of 4 elements with directional radiation patterns. We investigate the K-factor variation of the first delay bin in time, frequency, and space dimensions, where the measurement has a duration of 20 s, a bandwidth of 240 MHz, and 16 individual single-input single- output channels. 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 any of the considered domains, not even in the frequency domain, as it has been always done for relative bandwidths up to 10%. The narrow- band K-factor for each frequency bin corroborates the need to consider its frequency variation. The antenna radiation patterns, and the illuminated objects by them at different time instances are the cause of these variations. We conclude that a multi- dimensional varying K-factor models the large-scale statistical behaviour more accurately than a constant K-factor.

Publishing year

2010

Language

English

Pages

58-63

Publication/Series

[Host publication title missing]

Document type

Conference paper

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Conference name

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010

Conference date

2010-09-26 - 2010-09-29

Conference place

Istanbul, Turkey

Status

Published

Research group

  • Radio Systems

ISBN/ISSN/Other

  • ISBN: 978-1-4244-8017-3