TY - CONF T1 - Performance Comparison of Different Codes in an Ultrasonic Positioning System using DS-CDMA T2 - 6th IEEE International Symposium on Intelligent Signal Processing (WISP 2009) Y1 - 2009 A1 - María del Carmen Pérez A1 - Ureña, J. A1 - Álvaro Hernández A1 - Ana Jimenez A1 - Daniel Ruiz A1 - Fernando J. Álvarez A1 - Carlos De Marzziani JF - 6th IEEE International Symposium on Intelligent Signal Processing (WISP 2009) ER -