Before revision:  Specifically, we propose an empirical estimate of the capacity of the system based on a recent Gaussianization technique that reduces the (challenging ) multivariate PDF estimation problem to a set of (easy) univariate estimations.
After revision:  Specifically, we propose an empirical estimate of the capacity of the system based on a recent Gaussianization technique that reduces the (challenging ) multivariate PDF estimation problem to a set of simpler univariate estimations.