@book {, title = {Proceedings of Seventh International Conference on Indoor Positioning and Indoor Navigation (IPIN 2016)}, year = {2016}, pages = {400}, publisher = {IEEE}, organization = {IEEE}, address = {Alcal{\'a} de Henares}, isbn = {978-1-5090-2424-7}, author = {Juan Jes{\'u}s Garc{\'\i}a and Ure{\~n}a, J. and {\'A}lvaro Hern{\'a}ndez} }