Synchronization Performance of IEEE 802.15.4 IR-UWB Systems in Industrial Environments

Wireless sensor networks for industrial communication require both low latency and high reliability. As state of the art wireless sensor networks do not entirely meet these requirements, novel system approaches need to be developed. In this regard, ultra wideband communication systems seem to be a promising approach due to the high bandwidth and the robustness against frequency selectivity. This paper analyzes the IEEE 802.15.4 impulse-radio ultra-wideband physical layer in industrial environments. The performance is evaluated based on the IEEE 802.15.4a channel model as well as on channel measurement campaigns, which have been performed in realistic environments. The analysis in terms of packet error rate and coverage range considers the impact of two synchronization procedures. The results show a significant influence on the frequency selectivity. This work may serve as a guideline for the development of an industrial wireless sensor network.