EURASIP Journal on Applied Signal Processing
Volume 2003 (2003), Issue 4, Pages 321-337
doi:10.1155/S1110865703212075
Abstract
A novel sensor network source localization method based
on acoustic energy measurements is presented. This method makes
use of the characteristics that the acoustic energy decays
inversely with respect to the square of distance from the source.
By comparing energy readings measured at surrounding acoustic
sensors, the source location during that time interval can be
accurately estimated as the intersection of multiple
hyperspheres. Theoretical bounds on the number of sensors
required to yield unique solution are derived. Extensive
simulations have been conducted to characterize the performance
of this method under various parameter perturbations and noise
conditions. Potential advantages of this approach include low
intersensor communication requirement, robustness with respect to
parameter perturbations and measurement noise, and low-complexity
implementation.