Series feedforward interconnected adaptive devices

We examine performance issues encountered when connecting two adaptive signal processing devices in a series feedforward fashion. After introducing the notion of an adaptive element, we develop a simple behavior theory for series feedforward connected adaptive elements given a few reasonable assumptions. We then move on to predict ways such interconnections of adaptive elements may misbehave. A brief example of misbehavior in a pair of interconnected adaptive receiver components is included to highlight the implications of this emerging theory.