Title | Distributed TLS Estimation under Random Data Faults |
Publication Type | Conference Paper |
Year of Publication | 2015 |
Authors | Pereira, SSilva, Pagès-Zamora, A, López-Valcarce, R |
Conference Name | IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) |
Date Published | 04/2015 |
Publisher | IEEE |
Conference Location | Brisbane, Australia |
Keywords | compass, wsn |
Abstract | This paper addresses the problem of distributed estimation of a parameter vector in the presence of noisy input and output data as well as data faults, performed by a wireless sensor network in which only local interactions among the nodes are allowed. In the presence of unreliable observations, standard estimators become biased and perform poorly in low signal-to-noise ratios. We propose two different distributed approaches based on the Expectation-Maximization algorithm: in the first one the regressors are estimated at each iteration,whereas the second one does not require explicit regressor estimation. Numerical results show that the proposed methods approach the performance of a clairvoyant scheme with knowledge of the random data faults. |
PDF: