12. The method of claim 10 , wherein the nonlinear approximator includes a feedback loop, and wherein the feedback lop is operable to provide output of the nonlinear approximator from a previous cycle as input to the nonlinear approximator for a current cycle.
12. The method of claim 10 , wherein the nonlinear approximator includes a feedback loop, and wherein the feedback lop is operable to provide output of the nonlinear approximator from a previous cycle as input to the nonlinear approximator for a current cycle. 13. The method of claim 12 , wherein the representation of the nonlinear process comprises one or more of: a first principles model; a statistical model; a parametric description of the nonlinear process; a Fourier series model; an empirical model; or empirical data.