A General Model for Signal Level Variability
George A. Hufford · IEEE Journal on Selected Areas in Communications · 1987
A general model of received signal variability is outlined in which the signal level is represented as a simple algebraic combination of random functions which, in turn, vary with time, location, and the "situation." A study of signal variability should then be a study of the statistics of these separate random functions. Among other things, the model inspires extended definitions of the terms "reliability'' and "confidence."