Capacity of the oceanic waveguide

Abstract

Capacity between two multiple-input/multiple-output (MIMO) arrays can be computed by decomposing the Green’s function matrix into orthogonal functions, which can be thought of as independent subchannels. In a waveguide with sufficient array sampling, the modes are the independent subchannels, and capacity can easily be calculated for given waveguide parameters. Capacity is calculated using the optimal power allocation strategy of ‘‘water-filling.’’ Water-filling is simultaneously done across modes and frequency. Theoretically computed capacities for an oceanic waveguide between two vertical arrays for various waveguide parameters, along with physical explanation, will be presented.