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On Energy-Based Acoustic Source Localization for Sensor Networks

11 years 5 months ago
On Energy-Based Acoustic Source Localization for Sensor Networks
In this paper, energy-based localization methods for source localization in sensor networks are examined. The focus is on least-squares-based approaches due to a good tradeoff between performance and complexity. A suite of methods are developed and compared. First, two previously proposed methods (quadratic elimination and one step) are shown to yield the same location estimate for a source. Next, it is shown that, as the errors which perturb the least-squares equations are nonidentically distributed, it is more appropriate to consider weighted least-squares methods, which are observed to yield significant performance gains over the unweighted methods. Finally, a new weighted direct least-squares formulation is presented and shown to outperform the previous methods with much less computational complexity. Unlike the quadratic elimination method, the weighted direct least-squares method is amenable to a correction technique which incorporates the dependence of unknown parameters leading...
Chartchai Meesookho, Urbashi Mitra, Shrikanth Nara
Added 29 Dec 2010
Updated 29 Dec 2010
Type Journal
Year 2008
Where TSP
Authors Chartchai Meesookho, Urbashi Mitra, Shrikanth Narayanan
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