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Testing the Gaussianity of UWB TH-PPM MUI with imperfect power control and multipath

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2 Author(s)
Ramirez-Mireles, F. ; ITAM, Mexico City ; Almada, A.

We study the statistical nature of the multiuser interference (MUI) from pulse-based ultrawideband (UWB) signals with time-hopping (TH) and pulse position modulation (PPM). We determine the domain of validity for the Gaussian assumption for three different conditions: An ideal propagation channel with perfect and imperfect power control, as well as a multipath channel with rdquoperfect averagerdquo power control. Results for imperfect power control suggest that the Gaussian approximation can be used if we consider a large enough number of active users Nu and/or number of pulses per symbol Ns, e.g., for low data rate systems with large number of users. Results for multipath suggest that in dense multipath environment a low number of Nu and/or Ns is enough to reach Gaussianity.

Published in:

Electrical Engineering, Computing Science and Automatic Control, 2008. CCE 2008. 5th International Conference on

Date of Conference:

12-14 Nov. 2008