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- W2772030823 abstract "We address the problem of distributed estimation of a vector-valued parameter performed by a wireless sensor network in the presence of noisy observations which may be unreliable due to faulty transducers. The proposed distributed estimator is based on the Expectation-Maximization (EM) algorithm and combines consensus and diffusion techniques: a term for information diffusion is gradually turned off, while a term for updated information averaging is turned on so that all nodes in the network approach the same value of the estimate. The proposed method requires only local exchanges of information among network nodes and, in contrast with previous approaches, it does not assume knowledge of the a priori probability of transducer failures or the noise variance. A convergence analysis is provided, showing that the convergent points of the centralized EM iteration are locally asymptotically convergent points of the proposed distributed scheme. Numerical examples show that the distributed algorithm asymptotically attains the performance of the centralized EM method." @default.
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- W2772030823 date "2018-03-01" @default.
- W2772030823 modified "2023-10-17" @default.
- W2772030823 title "Parameter estimation in wireless sensor networks with faulty transducers: A distributed EM approach" @default.
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- W2772030823 doi "https://doi.org/10.1016/j.sigpro.2017.10.012" @default.
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