Abstract
The paper addresses the multimodal sensor selection problem where
selected collocated sensor nodes are employed to effectively monitor and
efficiently predict multiple spatial random fields. It is first proposed to
exploit multivariate Gaussian processes (MGP) to model multiple spatial
phenomena jointly. By the use of the Matern cross-covariance function,
cross covariance matrices in the MGP model are sufficiently positive
semi-definite, concomitantly providing efficient prediction of all
multivariate processes at unmeasured locations. The multimodal sensor
selection problem is then formulated and solved by an approximate
algorithm with an aim to select the most informative sensor nodes so
that prediction uncertainties at all the fields are minimized. The
proposed approach was validated in the real-life experiments with
promising results.