SIMULATION OF A SHALLOW WATER ACOUSTIC TELEMETRY CHANNEL

To be able to select appropriate signal architectures for various underwater acoustic communication channels a computer operable model that simulates the complete communications channel has been developed. The model utilizes time varying impulse responses and windowing techniques to determine the response to any given input signal. Statistical descriptors of the complex impulse and cw responses of the underwater acoustic environment of interest are used to develop the model impulse responses and to modify the input signal. This paper briefly outlines the model, and provides a comparison with some at sea experimental differential phase shift key (DPSK) data obtained in March of 1991 in Narragansett Bay, R. I.