@conference {370, title = {Ultrasonic Local Positioning System with Large Covered Area}, booktitle = {2007 IEEE International Symposium on Intelligent Signal Processing2007 IEEE International Symposium on Intelligent Signal Processing}, year = {2007}, month = {10/2007}, pages = {1 - 6}, publisher = {IEEE}, organization = {IEEE}, address = {Alcala de Henares, Spain}, isbn = {978-1-4244-0829-0}, doi = {10.1109/WISP.2007.4447508}, author = {Jos{\'e} Manuel Villadangos and Ure{\~n}a, J. and Manuel Mazo and {\'A}lvaro Hern{\'a}ndez and Carlos De Marzziani and Mar{\'\i}a del Carmen Perez and Fernando J. {\'A}lvarez and J.J. Garcia and Ana Jimenez and Gude, I.} }