Software emulation of TOA based ranging with UWB creeping wave around human body

摘要

Ultra wide band (UWB) technologies in wireless body area networks (WBAN) attract more and more attention in researches such as on-body medical healthcare. Meanwhile, body mounted sensors in WBAN with UWB signals are required to be located appropriately to collect data. Thus, making sure the sensors are at their proper locations is a critical issue in WBAN. Time of arrival (TOA) based ranging technique is applicable to do this. However, TOA measurement and analysis in real world is costly and time consuming while the feasibility of simulation results are skeptical. Thus, in this paper, we conduct both real measurements and simulations and compare their results to validate the capability of software simulation. Besides the comparison, accuracy of TOA measurements and simulations is analyzed, coming up with a Cramer-Rao lower bound which is treated as the performance guide line.