Source localization in shallow water using polynomial rooting

Source localization in a waveguide involves a multidimensional search procedure. The authors propose a new algorithm, in which the search in the depth direction is replaced by polynomial rooting. The proposed algorithm decreases the search dimension to one for a 2D localization problem (range and depth) and to two for a 3D one (range, depth) and direction-of arrival (DOA), independently of the number of sources. Consequently, the presented algorithm requires significantly less computation