Characterization of Multipath Effects in Indoor Positioning Systems by AoA and PoA Based on Optical Signals. - Álvaro De-La-Llana-Calvo; José Luis Lázaro Galilea; Alfredo Gardel Vicente; David Rodríguez-Navarro; Ignacio G. Bravo 001; Felipe Espinosa-Zapata (Sensors, 2019)