Mid and High Frequency Ocean Acoustic Channel Variability and its Impact on Underwater Acoustic Communications

摘要

Extensive research on the impact of channel variability on mid and high frequency acoustic communications systems has highlighted the important role that surface scattered signals play in determining the performance achievable by these systems. The surface scattered paths show the greatest amount of high dimensional variability (as opposed to the well structured and low degrees of freedom variability caused by platform motion) of the different propagation paths and pose significant challenges to reliable system operation. The long term goals of this work are to develop physics based deterministic and statistical models for this channel variability to exploit in the development of improved algorithm for optimizing communications system structure (topology, protocols, etc.) as well as the transmission of and processing.