The use of artificial neural networks in nonlinear microwave devices and circuits modeling: An application to telecommunication system design (invited article)

The design of telecommunication systems is a hierarchical process involving use of a large set of simulation tools and relying on appropriate modeling of system elements to obtain get-it-right-the-first-time fabrication, This paper investigates in detail possible application of neural network to mod eling of large-signal hard-nonlinear behavior of power transistors for circ uit design purpose, and modeling of nonlinear circuits such as power amplif iers for system design purpose, The problem of finding a good model is disc ussed through solutions offered by neural networks, with particular interes t in wavelet networks trained by BFGS algorithms, Finally, experimental res ults are reported. (C) 1999 John Wiley & Sons, Inc.