Exploitation of Environmental Complexity in Shallow Water Acoustic Data Communications

摘要

Complexity of the channel is beneficial for time reversal communications. After multichannel combining, each user signal is processed with a single channel decision feedback equalizer (DFE) to remove any residual intersymbol interference (ISI) and compensate for channel fluctuations during the packet transmission. This same approach can be applied in a synthetic aperture context where multiple transmissions (separated spatially) substitute for multiple receive elements. As an alternative to the passive time reversal technique, an iterative equalization and decoding approach also has been developed for recovering information transmitted through a shallow water communication channel.