V. Rizzoli et al., NONLINEAR PROCESSING OF DIGITALLY MODULATED CARRIERS BY THE INEXACT-NEWTON HARMONIC-BALANCE TECHNIQUE, Electronics Letters, 33(21), 1997, pp. 1760-1761
The Newton-iteration based harmonic-balance (HB) technique is generall
y acknowledged as the principal method for the simulation of nonlinear
circuits driven by multitone excitations. The authores propose a new
implementation of the HB principle, named the inexact-Newton harmonic
balance (INHB). This method provides a well-behaved and efficient solu
tion to the problem of HB simulation with very large numbers of closel
y spaced spectral lines.