AN ACOUSTIC CHANNEL MODEL FOR DIRECT AND MULTIPATH MODELS IN DEEPWATER

This book summarizes Undersea acoustic communications have drawn a lot of attention recently as their uses start to transition from military to commercial. The acoustic properties of the ocean are characterized by their tremendous complexity and dynamic nature. The parameters such as; depth temperature salinity location time of day and season of the underwater medium influences the acoustic signal propagation. However these medium parameters are varying arbitrarily depending upon shallow and deep-water divisions of the ocean. In addition to the medium parameters the characteristics of the acoustic channel (transmission loss absorption and multi-path) are affected by variation in the acoustic signal speed in underwater. The influence of the aforementioned parameters alters the velocity of acoustic transmission which affects network connectivity. Because research in the undersea environment is expanding rapidly proficient channel modelling is required to demonstrate the effect of sound speed variations with respect to medium parameters.