Underwater Localization Based on Multicarrier Waveforms
In this paper, the authors investigate the problem of localizing an underwater sensor node based on message broadcasting from multiple surface nodes. With the time-of-arrival measurements from a DSP-based multicarrier modem, each sensor node localizes itself based on the travel time differences among multiple senders to the receiver. Using one-way message passing, such a solution can scalable accommodates a large number of nodes in a network. They present simulation results as well as preliminary testing results in a swimming pool and in a local lake.