@conference {749,
	title = {Performance Comparison of Different Codes in an Ultrasonic Positioning System using DS-CDMA},
	booktitle = {6th IEEE International Symposium on Intelligent Signal Processing (WISP 2009)},
	year = {2009},
	month = {09/2009},
	pages = {125-130},
	author = {Mar{\'\i}a del Carmen P{\'e}rez and Ure{\~n}a, J. and {\'A}lvaro Hern{\'a}ndez and Ana Jimenez and Daniel Ruiz and Fernando J. {\'A}lvarez and Carlos De Marzziani}
}
