DALE: A range-free, adaptive indoor localization method enhanced by limited fingerprinting

A new range-free solution based on simple RSSI measurements is presented herein. The proposed method includes a two-stage algorithm and is able to incorporate fingerprints of specific locations, when available, in order to enhance localization accuracy. The proposed algorithm requires a strategic placement of nodes in each room while being easily scalable to a large number of rooms and adaptable to rooms with complex geometry. Simulation results are derived in order to evaluate the proposed algorithm and compared to relative research results in the literature.