I. Introduction
Sequential analysis is a field of statistics initially introduced by Abraham Wald in the late 1940s [1]. The aim of sequential analysis is to perform statistical inference, e.g., estimation or detection, with a minimum number of samples while ensuring a certain inference quality. An overview on sequential detection methods is given in [2] and on sequential estimation methods in [3]. Sequential inference is an area of ongoing research. Especially for low power or time critical applications, sequential methods are preferable to conventional ones.