Indoor location finding of the transmitter based on bluetooth received signal strength

Around the world, positioning in open environments is done via satellites. Generally, these systems are called Global Navigation Satellite Systems (GNSS). The most widely used GNSS is the Global Positioning System (GPS). GLONASS and Galileo are other GNSS systems which are used in Europe and Russia. Satellite positioning systems require a direct line of sight (LOS) with satellites to provide high accuracy. The GPS sensitivity can be reduced by a few meters in open areas. Due to physical objects like doors, walls of buildings, potential interference sources like electronic equipment, electrical sources, metal objects, it is almost impossible to use satellite positioning systems in indoor environment thus Indoor Positioning Systems (IPS) are being developed. In this thesis, we implement an Indoor Positioning System based on Bluetooth Smart Technology for signaling between transmitter and receivers. Besides, Trilateration and Linear Least Squares methods are used to determine the position of the transmitter together with the radio received signal strength. The estimated values are optimized by the Newton Raphson iteration method. The analysis of the results shows that the achieving mean errors is between 0.11 to 2.2 meters for stationary devices in a large-size laboratory. In the implemented system person of interests or items are not required to possess mobile devices, it is enough to carry Bluetooth Beacon devices which are cheap and efficient in terms of power consumption.