Title :
Multi-band acoustic modem for the communications and navigation aid AUV
Author :
Freitag, Lee E. ; Grund, Matthew ; Partan, Jim ; Ball, Keenan ; Singh, Sandipa ; Koski, Peter
Author_Institution :
Woods Hole Oceanogr. Instn., MA
Abstract :
An acoustic communications system with the capability to operate at multiple data rates in two frequency bands has been designed and developed for use in 21-inch AUVs. The system is specifically designed around the 21-inch diameter Bluefin Robotics AUV, though it could be adapted to smaller vehicles (12-inch), or similar free-flooded vehicles. The system includes both high (25 kHz) and mid-frequency (3 kHz) modems and supports data rates from 80 bps to more than 5000 bps. Both of the modems utilize four-channel arrays to increase reliability. The high-frequency modem is also used to support multi-vehicle navigation via one-way travel time measurements using synchronized clocks on all of the vehicles in a work group
Keywords :
modems; navigation; oceanographic equipment; remotely operated vehicles; underwater acoustic communication; underwater sound; underwater vehicles; 21 inches; 25 kHz; 5 kHz; Bluefin Robotics; acoustic communication; autonomous underwater vehicle; clock synchronization; four-channel array; free-flooded vehicles; high-frequency modem; multiband acoustic modem; multivehicle navigation; travel time measurement; underwater vehicles; Communication system control; Frequency synchronization; Intelligent sensors; Modems; Phase shift keying; Radio navigation; Sonar; Underwater acoustics; Underwater communication; Vehicles;
Conference_Titel :
OCEANS, 2005. Proceedings of MTS/IEEE
Conference_Location :
Washington, DC
Print_ISBN :
0-933957-34-3
DOI :
10.1109/OCEANS.2005.1639900
