An Improved Rational Model with Memory for the Digital Baseband Predistortion of Power Amplifier

The use of models described by the ratio of two polynomial approximations with memory has been rece iving particular attention by the wireless communication community. Rational models with memory require a lower number of coefficients and work better with extrapolation dat a than polynomial approximations. This work proposes a nov el rational model with memory that, in comparison with previous approaches having the same number of parameters, ca n increase the modeling accuracy. The novelties of the propose d rational model, in comparison with the best available ration al model, are the use of a larger set of truncation factors and t he inclusion of additional terms