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Accurate three-step algorithm for joint source position and propagation speed estimation
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DOI：10.1016/j.sigpro.2007.06.014.png)
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A popular strategy for source localization is to utilize the measured differences in arrival times of the source signal at multiple pairs of receivers. Most of the time-difference-of-arrival (TDOA) based algorithms in the literature assume that the signal transmission speed is known which is valid for in-air propagation. However, for in-solid scenarios such as seismic and tangible acoustic interface applications, the signal propagation speed is unknown. In this paper, we exploit the ideas in the two-step weighted least squares method [1] to design a three-step algorithm for joint source position and propagation speed estimation. Simulation results are included to contrast the proposed estimator with the linear least squares scheme as well as Cramer-Rao lower bound. (C) 2007 Elsevier B.V. All rights reserved.
Keyword:
source localization
propagation speed estimation
time-difference-of-arrival
weighted least squares
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