@conference {,
	title = {Link Budget of Low Bandwidth and Coded Ultrasonic Indoor Location Systems},
	booktitle = {International Conference on Indoor Positioning and Indoor Navigation (IPIN{\textquoteright}11)},
	volume = {1},
	year = {2011},
	month = {09/2011},
	pages = {1-5},
	publisher = {IEEE},
	organization = {IEEE},
	chapter = {1},
	address = {Guimaraes, Porugal },
	isbn = {978-1-4577-0086-6 },
	doi = {10.1109/Oceans-Spain.2011.6003515},
	author = {E. Garc{\'\i}a and J. J. Garc{\'\i}a and Ure{\~n}a, J. and S. Holm}
}
