An experimental evaluation of a digital predistortion system with thermal memory effects modeling

In the paper, we propose a novel DPD model including long term thermal memory effects modeling. The model is based on CPWL functions that are multidimensional mapping from R
ⁿ
to C
^m
, and predistorter coefficients are naturally nonlinear functions of the modeled thermal effects. Our tests show the CPWL-based DPD model with thermal memory effects modeling has roughly 5 dB gain for dynamic transmitted power of 4-carrier UMTS signal spanning 20 MHz.