Abstract

 
 
 In this paper, performance of different indicators for the profiling of Ultra Wide Band (UWB) wireless propagation channel are analyzed. In particular, the γ-indicator and the kurtosis index k are compared in terms of the standard error. In order to improve the accuracy in the kurtosis case, results of the bootstrap error procedure are also accomplished. Further, an evaluation on the computational time needed for error estimation, is also provided. The comparison is made according to a real set of data derived from UWB measurement campaign accomplished within a modern laboratory/office building in which the two above mentioned indicators have been evaluated.
 
 
Highlights
With the increasing of wireless communication systems several studies on the modeling of the propagation channels have been accomplished
The Line of Sight (LOS) cases correspond to Ultra Wide Band (UWB) propagation environments Room F1 and F2 in Fig. 1, in which the transmitting and the receiving antennas are placed in the same room with distances 9.5 m and 5.5 m, respectively
The distance between the transmitting and the receiving antennas is equal to 10 m and 17 m, that corresponds to Room H and B in Fig. 1, (NLOS1 and NLOS2 in Table I, respectively)
Summary
With the increasing of wireless communication systems several studies on the modeling of the propagation channels have been accomplished. The great advantages of UWB signals are given by their wall and other object penetration, allowing the UWB system to operate in severe NLOS scenarios These potentials, together with low cost trans-receiver, low transit power and low interference characteristics, make the UWB technology an excellent candidate for a wide range of measurement applications, such as wireless propagation modeling [1,2,3], localization for indoor and outdoor positioning [4,5,6] and short range applications [7,8]. In [1, 11], the kurtosis parameter k has been proposed to identify the typology of the link between the transmitting and the receiving antennas Both of the two above mentioned parameters, i.e., the kurtosis k and the gamma-indicator γ, have been used in the past to discriminate channel profiles, but no comparison has been accomplished to establish which indicator has the best performance.
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