Ultra wideband system outage studies in a square cell with partial Rake receiver and lognormal fading

Abstract

Ultra wideband (UWB) spread spectrum system performance is analysed in a square-shaped cell with centralised and distributed topologies. Cochannel interference induced outage probability is used as a performance measure. The probability of outage varies depending on the spatial distribution of users (link distances), propagation parameters, user activities, and receiver timing errors. Power sums of multiple lognormal signal components are approximated by a Fenton-Wilkinson method. Differences between centralised and distributed topologies are outlined. Numerical results show the strong dependence of outage probability of the link distances and path losses.