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  • Research Article
  • Open Access

Outage Analysis of Ultra-Wideband System in Lognormal Multipath Fading and Square-Shaped Cellular Configurations

EURASIP Journal on Wireless Communications and Networking20062006:019460

  • Received: 1 September 2005
  • Accepted: 4 December 2005
  • Published:


Generic ultra-wideband (UWB) spread-spectrum system performance is evaluated in centralized and distributed spatial topologies comprising square-shaped indoor cells. Statistical distributions for link distances in single-cell and multicell configurations are derived. Cochannel-interference-induced outage probability is used as a performance measure. The probability of outage varies depending on the spatial distribution statistics of users (link distances), propagation characteristics, user activities, and receiver settings. Lognormal fading in each channel path is incorporated in the model, where power sums of multiple lognormal signal components are approximated by a Fenton-Wilkinson approach. Outage performance of different spatial configurations is outlined numerically. Numerical results show the strong dependence of outage probability on the link distance distributions, number of rake fingers, and path losses.


  • Distribution Statistic
  • User Activity
  • Outage Probability
  • Path Loss
  • Spatial Configuration


Authors’ Affiliations

Centre for Wireless Communications, University of Oulu, P.O. Box 4500, 90014, Finland


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© Pekka Pirinen 2006

This article is published under license to BioMed Central Ltd. 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.