This is an unusual question in this forum but I couldn't think of a better place. I'm new to Signal Processing. Currently I'm looking into localization methods using multiple sensors. This requires, I assume, some sort of "controlling" matrix that will eventually approximate the location of your object of interest, using various inputs. Usually I find this problem under the discussion of Signal Processing. Is this not, though, fundamentally Control Theory, since we're developing a control regime to reduce our error to zero?