Wideband channel dynamics (measurement and simulation)

The increasing demands on the limited frequency spectrum combined with the higher data rate requirements imposed by the convergence of data and voice services mean that increasingly, mobile operators are turning to spectrally efficient wideband systems such as code division multiple access (CDMA). However, in order to successfully implement capacity enhancement techniques, or to design a reliable wireless data link, a detailed knowledge of the radio channel is required. Ideally, accurate spatial channel models and wideband non-stationary channel models are required to evaluate the proposed technologies. It is the aim of this paper to present and discuss selected results derived from power delay profiles (PDPs) which were obtained during a set of propagation trials conducted at 1.9 GHz in central London by Nortel Networks Radio Technology Group in 1999. It also presents results from an enhanced version of the Turin et al. (1972)/Hashemi (1977) wideband, non-stationary simulation of the urban radio propagation (SURP) model which uses statistics derived from the wideband London measurements.