A double rate positioning algorithm for Underwater Acoustic Networks

Localization is a major issue for Underwater Acoustic Networks (UANs). UANs have some special characteristics different from terrestrial networks such as acoustic communication, inconvenience of using GPS and few anchors (nodes which know their coordinates). Due to these problems, people have proposed some algorithms, however, some of them will raise the cost and some of them cannot get high positioning accuracy with few anchors. In this paper, we proposed a double rate poisoning scheme (DRP) which separates the localization procedure into 2 modes by changing the symbol duration. One mode is used to measure the distance precisely; the other mode is to transmit a great amount of data quickly. From the simulation, we can see that it can get high positioning accuracy with only one anchor by this way.