Indoor Localization Using Neural Networks with Location Fingerprints

Reliable localization techniques applicable to indoor environments are essential for the development of advanced location aware applications. We rely on WLAN infrastructure and exploit; location related information, such as the Received Signal Strength (RSS) measurements, to estimate the unknown terminal location. We adopt Artificial Neural Networks (ANN) as a function approximation approach to map vectors of R,SS samples, known as location fingerprints, to coordinates on the plane. We present; an efficient; algorithm based on Radial Basis Function (RBF) networks and describe a data clustering method to reduce the network size. The proposed algorithm is practical and scalable, while the experimental results indicate that; it outperforms existing techniques in terms of the positioning error.