@conference {, title = {Performance of an Underwater Acoustic Relative Positioning System using Coded Signals and Round-trip Times of Flight{\textquotedblright}}, booktitle = {2012 European Conference on Underwater Acoustics (ECUA 2012)}, volume = {1}, year = {2012}, month = {07/2012}, pages = {1-4}, chapter = {1}, address = {Edimburgo, Escocia UK}, author = {J. Aparicio and C. Diego and A. Jim{\'e}nez and F. J. {\'A}lvarez and Ure{\~n}a, J. and C. de Marziani} }