A new look-up-table based adaptive baseband predistorter

In this paper, we propose a new look-up-table (LUT) based adaptive baseband predistorter which corrects signal distortions caused by the high power amplifier (HPA) and other analog processing modules in transmitters. For the fast initialization of the LUT, a corresponding initialization algorithm is proposed. An adaptive updating algorithm is also proposed to compensate for the time-varying property of the HPA. The simulation results demonstrate that nonlinear distortions can be greatly reduced with this algorithm.