Time- and Frequency-Varying K -Factor of Non-Stationary Vehicular Channels for Safety-Relevant Scenarios
(2015) In IEEE Transactions on Intelligent Transportation Systems 16(2). p.1007-1017- Abstract
- Vehicular communication channels are characterized by a non-stationary time- and frequency-selective 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... (More)
- Vehicular communication channels are characterized by a non-stationary time- and frequency-selective 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. We demonstrate that the K-factor cannot be assumed to be constant in time and frequency. The causes of these variations are the frequency-varying antenna radiation patterns, as well as the time-varying number of active scatterers, and the effects of vegetation. We also present a simple but accurate bimodal Gaussian mixture model, which allows to capture the K-factor variability in time for safety-relevant ITS scenarios. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4731601
- author
- Bernado, Laura ; Zemen, Thomas ; Tufvesson, Fredrik LU ; Molisch, Andreas LU and Mecklenbrauker, Christoph F.
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Channel modelling, intelligent transportation systems, non-stationary fading, Rician K-factor, safety-relevant scenarios, vehicle-to-vehicle links
- in
- IEEE Transactions on Intelligent Transportation Systems
- volume
- 16
- issue
- 2
- pages
- 1007 - 1017
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- wos:000352282500041
- scopus:85027929609
- ISSN
- 1524-9050
- DOI
- 10.1109/TITS.2014.2349364
- language
- English
- LU publication?
- yes
- id
- 3b652d6d-9e2c-479f-b223-3a475a59c3bb (old id 4731601)
- date added to LUP
- 2016-04-01 13:37:24
- date last changed
- 2022-03-21 19:36:03
@article{3b652d6d-9e2c-479f-b223-3a475a59c3bb, abstract = {{Vehicular communication channels are characterized by a non-stationary time- and frequency-selective 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. We demonstrate that the K-factor cannot be assumed to be constant in time and frequency. The causes of these variations are the frequency-varying antenna radiation patterns, as well as the time-varying number of active scatterers, and the effects of vegetation. We also present a simple but accurate bimodal Gaussian mixture model, which allows to capture the K-factor variability in time for safety-relevant ITS scenarios.}}, author = {{Bernado, Laura and Zemen, Thomas and Tufvesson, Fredrik and Molisch, Andreas and Mecklenbrauker, Christoph F.}}, issn = {{1524-9050}}, keywords = {{Channel modelling; intelligent transportation systems; non-stationary fading; Rician K-factor; safety-relevant scenarios; vehicle-to-vehicle links}}, language = {{eng}}, number = {{2}}, pages = {{1007--1017}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{IEEE Transactions on Intelligent Transportation Systems}}, title = {{Time- and Frequency-Varying K -Factor of Non-Stationary Vehicular Channels for Safety-Relevant Scenarios}}, url = {{http://dx.doi.org/10.1109/TITS.2014.2349364}}, doi = {{10.1109/TITS.2014.2349364}}, volume = {{16}}, year = {{2015}}, }