A Darling–Erdős-type CUSUM-procedure for functional data

The focus of the paper is nonparametric detection of changes in the mean of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$$m$$</EquationSource> <EquationSource Format="MATHML"> <math xmlns:xlink="http://www.w3.org/1999/xlink"> <mi>m</mi> </math> </EquationSource> </InlineEquation>-dependent stationary functional data via a cumulative sum (CUSUM) procedure. We consider a projection-based quasi-maximum likelihood CUSUM-procedure which relies on a Darling–Erdős-type limit theorem. Under mild moment assumptions we investigate the asymptotic properties under the null hypothesis and show consistency under the alternatives of either an abrupt or a gradual change in the mean. The finite sample behavior is illustrated in a small simulation study including an application to temperature data from Hohenpeißenberg (Bavaria, Germany). Copyright Springer-Verlag Berlin Heidelberg 2015