Wi-Fi Based Indoor Location With Multi-parameter AP Selection and Device Heterogeneity Weakening

A new indoor location method based on multi-parameter access point selection and device heterogeneity weakening is proposed. The Dixon Criterion is applied to filter and select AP through the three parameters such as the Wi-Fi signals stability, the signals relevance, and the reference point discrimination ability. The Wasserstein distance is applied as a weight in our positioning algorithm to mitigate the positioning errors caused by device heterogeneity. The experimental results show that with the proposed method the average positioning error is reduced by 10% and the positioning stability is improved by 94.9% compared with the known WKNN method.