A simple derivation of the autocorrelation of a random pulse train

A simple derivation is given for the autocorrelation of the random process y(t) = Σkhk(t-tk) where the random function hk(t) is idependent of {tk} and of hn(t), n ≠ k, and {tk} is a random point process (not necessarily stationary). The results are applied to a model of an electrical power system.