In the indoor wireless sensor network positioning system based on Received Signal Strength Indication (RSSI),the propagation direction of the wireless signal changes due to the occlusion of the wall,which makes the RSSI measurement inaccurate,which makes it difficult to build a channel model and cannot achieve high positioning accuracy.So,this paper proposes a new environment adaptive path attenuation model.Based on the traditional logarithmic path model,the model considers the reflection loss and transmission loss generated when the wireless signal encounters the wall,and derives the corresponding path attenuation,in the positioning experiment,3.5m is selected as the optimal communication distance,and the position coordinates of the unknown node are calculated by using the trilateration positioning algorithm.The experiment results show that the positioning accuracy of the proposed TRL attenuation multi-wall model is 26.9% higher than that of the traditional path loss model,the indoor positioning effect is improved,and it has better environmental adaptability.
Key words
WSN /
loss model /
RSSI /
indoor localization
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