LoRa Positioning Algorithm based on RSSI and AoA

The research and application fields of lorA-based positioning are very wide, and it has always been a hot spot of radio sensor research.Traditional LoRa positioning usually uses RSSI for positioning.Due to the influence of itself and the environment, there is a large deviation between the positioning coordinates and the actual coordinates, and accurate positioning cannot be achieved.Aiming at the above problems, a LoRa positioning algorithm based on RSSI and AoA was proposed.LoRa cannot process the Angle of the signal at the hardware level, and in this paper, the time difference of the signal arrival is used to estimate the Angle.Theoretical analysis and experimental results show that the average positioning error of the algorithm used in this paper is 1.22m in the experimental scene of a triangle with a side length of 100m, and the error value fluctuation is not large, which effectively reduces the positioning error and has relatively high stability.