Increasing localization robustness using directional antennas

Within this paper a novel approach for localization of roaming nodes is presented that uses static directional antennas at the receiver side to measure the received signal strength (RSS). In contrast to omni-directional antennas it is not possible to formulate an analytical relationship of distance to received signal power. The characteristics as well as benefits and challenges of directional antennas are analysed and a concept for an iterative approach is presented that uses a stored antenna pattern to estimate the transmitter position. Finally, a Bluetooth based measurement setup is presented, that will be used for the upcoming validation of the proposed algorithm.