Acoustic Beam Characterization and Selection for Optimized Underwater Communication

Underwater Acoustic Communication

Keywords: acousticc communicationss coherentt equalizationn channel estimationn multi-pathh diversity c o m biningg beamformingg multiuser detectionn underwater data networkss sparse equalizationn blind equalizationn multirate adaptive lteringg cyclostationary statistics .

Characterization of Long-Range Time-Varying Underwater Acoustic Communication Channels

Bidirectional equalization for underwater acoustic communication.

The bidirectional decision feedback equalizer (BiDFE) that combines the outputs of a conventional decision feedback equalizer (DFE) and backward DFE can improve the performance of the conventional DFE by up to 1-2 dB based on simulations. In this letter, the BiDFE concept is extended to multichannel time reversal communications involving a DFE as a post-processor. Experimental data collected in...

Generalised differential encoding for underwater acoustic communication

We study the efficacy of a generalised form of differential encoding of binary phase shift keyed (BPSK) signals transmitted through a shallow underwater acoustic communication channel. Using simulations involving a fixed source and a receiver moving about with the surface waves, we show that no advantage arises from using the generalised differential encoding methods. On the contrary, the best ...

A Novel Optimized Approach for Underwater Acoustic (UWA) Cooperative Communication Systems to Achieve Delay Diversity

The communication through water is different scenario from the communication on the land, while transmission through the water the delays are frequently happens when the signals received from geographically separated nodes. Moreover, UWA communications enable high motion agility and flexibility of the nodes, and allow interactive system query and instantaneous system response. The UWA environme...