TY - CONF T1 - Ultrasonic Positioning System by using UWB techniques T2 - 2009 IEEE Conference on Emerging Technologies & Factory Automation (ETFA 2009) Y1 - 2009 A1 - E. García A1 - J.J. Garcia A1 - Álvaro Hernández A1 - A. Jiménez A1 - Ureña, J. A1 - Daniel Ruiz A1 - María del Carmen Pérez JF - 2009 IEEE Conference on Emerging Technologies & Factory Automation (ETFA 2009) ER -