TY - CONF T1 - Relative positioning system using simultaneous round trip time of flight measurements. T2 - 11th IEEE Int. Conf. on Emergy Technologies and Factory Automation (ETFA 2006) Y1 - 2006 A1 - Carlos De Marzziani A1 - Ureña, J. A1 - Manuel Mazo A1 - Álvaro Hernández A1 - J.J. Garcia A1 - Ana Jimenez A1 - María del Carmen Perez A1 - Alberto Ochoa A1 - José Manuel Villadangos JF - 11th IEEE Int. Conf. on Emergy Technologies and Factory Automation (ETFA 2006) CY - Praga, República Checa SN - 1-4244-0881-1 ER -