Position location technologies using signal strength in cellular systems

This paper proposes a novel algorithm to locate a mobile terminal (MS) in a cellular system. The proposed algorithm is based on signal strength measurements. It considers the fluctuation in received signal strength due to shadowing, and obtains probability density functions (PDFs) of the propagation distances. An overall PDF, obtained by combining the PDFs, is used to determine the MS location. Results obtained from computer simulations and field experiments show that the proposed algorithm is more accurate than the conventional cell-based algorithm.