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International Journal of Antennas and Propagation
Volume 2015 (2015), Article ID 372124, 21 pages
http://dx.doi.org/10.1155/2015/372124
Research Article

Modeling of the Land Mobile Satellite Channel considering the Terminal’s Driving Direction

1Institute for Information Technology, Technische Universität Ilmenau, Helmholtzplatz 2, 98693 Ilmenau, Germany
2Telecommunication Engineering School, University of Vigo, 36310 Vigo, Spain

Received 9 May 2014; Revised 4 August 2014; Accepted 5 August 2014

Academic Editor: Jose F. Paris

Copyright © 2015 Marie Rieche et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A precise characterization of the Land Mobile Satellite (LMS) channel, that is, the channel between a satellite and a mobile terminal, is of crucial importance while designing a satellite-based communication system. State-of-the-art statistical LMS channel models offer the advantage of requiring only a few input parameters, which include the environment type and the elevation angle of the satellite. However, the azimuth angle relative to the driving direction of the mobile terminal is usually ignored, as its proper modeling requires either an extensive measurement campaign or a significant effort from the user, as a precise geometrical description of the scenario is required. In this contribution we show that the impact of the driving direction on the channel statistics is not negligible and requires to be modeled explicitly. Moreover, we propose a statistical LMS channel model whose parameters are obtained via an image-based state estimation method. The image-based method is verified by a comparison with measured radio frequency signal levels. The proposed method allows obtaining a complete statistical description of the channel for arbitrary elevation and azimuth angles.