Blind mobile sensor calibration using an informed nonnegative matrix factorization with a relaxed rendezvous model
Clément Dorffer, Matthieu Puigt, Gilles Delmaire, Gilles Roussel
Abstract
In this paper, we consider the problem of blindly calibrating a mobile sensor network-i.e., determining the gain and the offset of each sensor-from heterogeneous observations on a defined spatial area over time. For that purpose, we previously proposed a blind sensor calibration method based on Weighted Informed Nonnegative Matrix Factorization with missing entries. It required a minimum number of rendezvous-i.e., data sensed by different sensors at almost the same time and place-which might be difficult to satisfy in practice. In this paper we relax the rendezvous requirement by using a sparse decomposition of the signal of interest with respect to a known dictionary. The calibration can thus be performed if sensors share some common support in the dictionary, and provides a consistent performance even if no sensors are in exact rendezvous.
BibTeX
@inproceedings{icassp2016_blindmobilesenso,
title = {Blind mobile sensor calibration using an informed nonnegative matrix factorization with a relaxed rendezvous model},
author = {Clément Dorffer and Matthieu Puigt and Gilles Delmaire and Gilles Roussel},
booktitle = {ICASSP 2016},
year = {2016}
}