An Upgraded Dual-Band Digital Predistorter Model for Power Amplifiers Linearization

Digital predistortion (DPD) based on Volterra models is commonly employed to counteract the nonlinear distortion of power amplifiers. However, when concurrent dual-band signals are transmitted, 2-D DPD required. In this work, upgrading a standard model proposed and justified using multinomial theorem. The linearization performance current proposal has been compared unextended model. Fifth generation (5G) New Radio have generated compose signal, which later was as input signal at Chalmers University Technology’s RF WebLab. Using coefficient selection techniques, most relevant regressors shown, importance new extension proven. Linearization results highlight benefits proposal.