Linear Regression Algorithm against Device Diversity for Indoor WLAN Localization System

In recent years, received signal strength (RSS) based indoor localization system using WLAN has attracted considerable attention. However, signal strength variations across diverse devices becomes a major problem in this system, especially in the crowdsourcing based localization system. In this paper, the linear regression algorithm is proposed to solve this problem automatically. First of all, the problem of device diversity and the adverse effects caused by this problem are analyzed. Then the intrinsic relationship between different RSS values collected by different devices is mined by the linear regression algorithm. The problem of device diversity will be handled by this algorithm. In crowdsourcing systems, when the major problem is eliminated, a unique radio-map can be created in the offline phase and the user's location can be estimated by a localization algorithm in the online phase. Experimental results show that the proposed method results in a higher reliability and localization accuracy.

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