Time-Variant Radio Channel Characterization and Modelling of Vegetation Media at Millimeter-Wave Frequency

Results of an extensive measurement campaign to characterize and model dynamic effects on the radio channel in vegetation media at 40 GHz, are presented. Using two small trees in an anechoic chamber, narrowband fast-fading measurements, utilizing co-polarized signals, were conducted to obtain radio...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2012-03, Vol.60 (3), p.1557-1568
Main Authors: Morgadinho, S., Caldeirinha, R. F. S., Al-Nuaimi, M. O., Cuinas, I., Sanchez, M. G., Fernandes, T. R., Richter, J.
Format: Article
Language:English
Subjects:
Antenna measurements
Applied sciences
Channel characterization
channel modelling
Exact sciences and technology
foliage scattering
Media
Radio transmitters
radiowave
Receivers
Scattering
Studies
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
time-variant
Transmission and modulation (techniques and equipments)
Vegetation
Wind speed
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Summary:Results of an extensive measurement campaign to characterize and model dynamic effects on the radio channel in vegetation media at 40 GHz, are presented. Using two small trees in an anechoic chamber, narrowband fast-fading measurements, utilizing co-polarized signals, were conducted to obtain radio channel characterization. This was performed as a function of the bi-static scattering angle, wind speed, wind incidence, and tree species. Furthermore, a modelling methodology is investigated and assessed as to its feasibility as a means to model vegetation dynamics effects on propagation. A radio channel model based on a simplified set of Markovian parameters, is proposed. The model is representative of the radio signal in the three main identified propagation regions around a vegetation volume as a mean to satisfactorily model highly time-variant radio signals. The propagation regions considered are receiver angular sections (in the azimuth plane) around the tree, where the received signal behaves distinctly for each region. Model validation results are presented using one of the tree species.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2011.2180301