Study Of Coexistence Between UWB And Cellular Mobile Communication Systems

The Ultra-wide Bandwidth (UWB) wireless communication system works at a very low power density, sharing the spectrum with traditional narrowband wireless communication system. Currently, it is a hot spot to research how to realize the co-existence of UWB and cellular mobile communication systems. This topic comes from national natural science foundation of China and national science and technology major projects, and has important theoretical and realistic significance.Based on the in-depth analysis of the UWB system technology characteristics and the basic principle of cellular mobile communication system technology characteristics and performance, this paper studies the interference from a single UWB devices and the cumulative interference from multiple UWB devices to cellular mobile communication systems.This paper develop a new three-dimensional model of UWB wireless system.We particularly focused on indoor environments and the downlink of GSM-900, GSM-1800, TD-SCDMA and WCDMA. As a basis we considered a 3D geometry ogether with a traffic model describing the UWB transmission activities. With the developed statistical interference model we computed the outage probability as a function of UWB device density. Maximum acceptable UWB device densities and outage probabilities were determined with respect to current FCC and ETSI emission limits. We finally chose an algorithm applying a Monte-Carlo simulation. Based on the results presented one can judge the performance of the narrowband cellular systems to resist the interference from mutiple UWB devices and the protection efficiency of current regulations by FCC and ETSI.