@article {,
	title = {Improved Ultrasonic Phased Array Based on Encoded Transmissions for Obstacle Detection},
	journal = {Sensors},
	volume = {15},
	year = {2015},
	month = {02/2015},
	pages = {827- 835            },
	publisher = {MPDI},
	address = {Suiza },
	issn = {1530-437X},
	doi = {10.1109/JSEN.2014.2354987},
	author = {C. Diego and A. Jim{\'e}nez and {\'A}lvaro Hern{\'a}ndez and C. J. Martin}
}
