A general analysis of post-detection correlation
L. Campbell · IEEE Transactions on Information Theory · 1965
Consider a system which consists of two receivers, each containing a nonlinear device followed by a zonal filter. A general method is developed for calculating the cross-correlation function of the outputs of these receivers when the inputs are two related narrow-band Gaussian processes. In the course of the development some new results are obtained concerning the cross-correlation function of two pre-envelopes.