Title :
NLOS identification using a hybrid ToA-signal strength algorithm for underwater acoustic localization
Author :
Diamant, Roee ; Tan, Hwee-Pink ; Lampe, Lutz
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada
Abstract :
The existence of obstacles in harbors or near shore environments leads to Non-Line-Of-Sight (NLOS) links between two underwater acoustic communication (UWAC) nodes. That is, only echoes of the transmitted signal arrive at the receiving node. Mistaking the first (strong) echo as a Line-Of-sight (LOS) measurement and using it for ranging causes significant degradation of the accuracy level of UWAC-based localization. In this paper, we propose a solution for the NLOS identification problem in underwater acoustic localization. Results from both extensive simulations and sea trial experiments confirm our approach and demonstrate a high detection rate of NLOS measurements.
Keywords :
time-of-arrival estimation; underwater acoustic communication; hybrid ToA-signal strength algorithm; line-of-sight measurement; nonline-of-sight identification; time-of-arrival; underwater acoustic communication nodes; underwater acoustic localization; Attenuation; Distance measurement; Noise; Propagation losses; Protocols; Sea measurements; Underwater acoustics;
Conference_Titel :
OCEANS 2010
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-4332-1
DOI :
10.1109/OCEANS.2010.5664483
