Indoor localization for autonomous mobile robot based on passive RFID

In this paper, we propose a novel method using read-time of IC tags to reduce the localization error of an RFID navigation system. In order to reduce localization error, many approaches have been introduced. However, they do not deal with the problems that arise when the antenna can read at most one tag at any given moment. Using this our passive RFID system is able to estimate the robot's location and orientation more accurately without the use of external sensors or a vision system. The experimental results show that the proposed method effectively estimates both the location and the pose of a mobile robot during navigation. We present results of trajectories of the robot in navigation and compare them with a generally utilized RFID algorithm.