Wideband and Ultrawideband Channel Models in Working Machine Environment. (19th September 2012)

• Record Type: Journal Article
• Authors: Taparugssanagorn, Attaphongse; Hämäläinen, Matti; Iinatti, Jari
• Other Names: Pätzold Matthias Academic Editor.
• Is Part Of: Modelling and simulation in engineering. Volume 2012(2012)
• Publication Date: 2012-09-19
• Subjects: Engineering -- Simulation methods -- Periodicals; Engineering -- Mathematical models -- Periodicals; 620.004
• DOI: 10.1155/2012/702917
• Languages: English
• ISSNs: 1687-5591

Abstract

Abstract : We present statistical models for wideband and ultrawideband (UWB) radio channels in a working machine cabin environment. Based on a set of measurements, it was found that such a small and confined space causes mostly diffuse multipath scattering rather than specular paths. The amplitude of the channel impulse responses in the wideband case is mostly Rayleigh distributed small-scale fading signal, with only a few paths exhibiting Ricean distributions, whereas the ones in the UWB case tend to be log-normally distributed. For the path amplitude, we suggest an exponential decay profile, which has a constant slope in dB scale, with the corresponding parameters for the UWB case. For the wideband case, a twofold exponential decay profile provides excellent fits to the measured data. It was also noted that the root-mean-square (RMS) delay spread is independent of the line-of-sight/obstructed line-of-sight situations of the channel. The multipath components contributing significant energy play a major role in such a small environment if compared to the direct path. In addition, the radio channel gains are attenuated with the presence of a driver inside the cabin.