Behavior modeling for multi-carrier multi-mode power amplifiers using real-valued time-delay RBF networks

This paper proposes a real-valued time-delay radial basis function (RVTDRBF) networks suitable for dynamic modeling of the baseband nonlinear behaviors of the multi-carrier multi-mode power amplifiers (MMPA). Parameters (weights and centers) of the proposed model are identified using the orthogonal least square (OLS) algorithm. In order to verify the model ability for modeling the nonlinearity of MMPA, a 110-W LDMOS class-AB PA and three different test signals are used. The three different test signals are three-carrier CDMA2000, one-carrier WCDMA and twelve-carrier CDMA2000, respectively. The accuray of the proposed model is investigated with the normalized mean square error (NMSE), the amplitude and the output spectrum. The validation results demonstrate the accuracy of the RVTDRBF model.