Multiple source localization using randomly distributed wireless sensor nodes

In this paper, we present a method to localize multiple sources using randomly distributed wireless sensor nodes. The principle of maximum power collection is used to obtain the beamforming weights which add the source signal constructively at the sensor outputs. The beamforming weights give the time difference of arrival (TDOA) for each of the sources from which the source location is subsequently computed using a hyperbolic estimator. Results show that the method successfully localizes multiple sources in noise.