A quantitative CLT on a finite sum of Wiener chaoses and applications to ratios of Gaussian functionals

Abstract: In this paper we provide a new explicit bound on the total variation distance between a standardized partial sum of random variables belonging to a finite sum of Wiener chaoses and a standard normal random variable. We apply our result to derive an upper bound for the Kolmogorov distance between a ratio of multiple stochastic integrals and a Gaussian random variable.