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

fYear

2010

Firstpage

1

Lastpage

7

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;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS 2010

Conference_Location

Seattle, WA

Print_ISBN

978-1-4244-4332-1

Type

conf

DOI

10.1109/OCEANS.2010.5664483

Filename

5664483