关键词: 三点定位, 三角定位算法, RSSI测距, 坐标加权

Abstract:

To address significant localization errors and results fluctuation arising in the application of the traditional triangulation localization algorithm based on RSSI（Received Signal Strength Indication）, the paper offers a triangulation localization algorithm based on three-point localization and weighted coordinates. In this particular algorithm, RSSI data undergo Kalman filtering to reduce the data fluctuation. The filtered data are processed following the RSSI-based three-point localization algorithm to obtain coarse localization coordinates. Three obtained coarse coordinates are dealt with according to the weighted coordinate-based triangulation algorithm to acquire the coordinates of the point to be localized. Experiment results show that the error values from the algorithm proposed in the paper are not greater than 1.602 m, with an average sitting at 0.880 m, provided the fitting of RSSI-distance attenuation model reaches 96%.

Key words: three-point positioning, triangulation algorithm, Received Signal Strength Indication（RSSI） ranging, coordinate weighting