Influence of antennas characteristics on accuracy of TOA indoor positioniong systems

The paper presents analysis of dependence of distance determination error in localization system based on time of arrival (TOA) measurements, on beam width of antenna radiation pattern. Using narrow beam antennas some multipath components with small delays, causing errors of calculation of distance between antennas, can be eliminated and accuracy of the system can be increased. Analysis bases on results of raytracing simulations, used to determine parameters of the propagation channel for considered configuration of indoor environment. Dependence on system bandwidth and detection method implemented in the system have also considered during the analysis. This research is part of EU VI FP RESOLUTION project which goal is to develop accurate positioning system operating in an indoor rich scattering environment, i.e. factory halls.