EFFECTS OF SAMPLING PERIODS ON THE COMMUNICATION RELIABILITY AND THE ESTIMATION ACCURACY OF AN RSSI-BASED INDOOR LOCALIZATION SYSTEM
Keywords:
Sampling period, RSSI-based localization, mobile target, indoor, experimentAbstract
In this paper, the experimental study of a received signal strength indicator (RSSI)-based indoor localization system is presented. The major contribution of our paper is twofold. First, how the sampling period set for the reference nodes affects the communication reliability and the estimation accuracy of the target localization system is investigated. Second, the optimal sampling period for the reference nodes is determined, and it also applied for the test in the case of a mobile target scenario. Experiments using low-cost low-power 2.4 GHz wireless nodes developed by our research team have been carried out in an office environment. Experimental results demonstrate that the sampling period set for the reference nodes significantly affects the communication reliability of the localization system as indicated by the level of the packet delivery ratio. It also affects the estimation accuracy of the mobile target localization as indicated by the estimated position determined by the trilateration method. Consequently, the optimal sampling period is the period which can achieve both the communication reliability and the estimation accuracy of the RSSI-based indoor localization system.
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