Precise estimation of multiple transmission paths in an acoustic system

A method is proposed for precisely identifying the multiple signal transmission paths of a multi-input single-output acoustic system by using correlated input signals. Such identification has not been previously achieved by a conventional straightforward generalization of the principle for identifying a single-input single-output acoustic system. To this end, pre-filters are applied to the system inputs so that the relation between inputs and output satisfies-the condition of a unique solution set given by the framework ofa diophantine equation