Indoor Positioning System Based on Detecting the Zone Using Array Antenna

Abstract

In late years the means of the position detection is required not only outdoors but also indoors. Therefore the means of the indoor position detection is groped for. In this paper, we propose the indoor positioning system based on detecting the zone using four array antennas placed in the square. The base station which is attached to a ceiling downward measures the angle of arrival (AOA) of the radio wave at the unit of a quadrant in the two-dimensional coordinate. The zone is detected based on the combination between measurements of base stations. According to the evaluation test in the indoor environment, the proposed method is robust in the environment affected by the multi-path or outside the domain where a direct wave reaches.