Indoor Positioning Experiments based on BT 5.1

With the popularity of GPS and other positioning technologies, people are increasingly aware of the importance of positioning technology. However, due to poor indoor GPS signal and complex environment, many indoor positioning schemes are not ideal. Bluetooth, with its open global specification, has been widely used in all fields with the advantage of extremely low cost. With the release of Bluetooth 5.0, the power consumption and communication rate of low power devices have been greatly improved, and the anti-interference performance has also been optimized. All of these enhancements open up many location technology possibilities for Bluetooth 5.0. Direction Finding was added to the Bluetooth 5.1 standard, which is one of the possibilities of indoor positioning utilization. This paper focuses on the direction finding function of Bluetooth 5.1, discusses the principle of direction finding using Bluetooth, and some of experiments are designed to verify the algorithm.