An improved LUT based predistortion method for HPA with memory effects in WCDMA systems

In this paper, we focus on the 2D LUT (2-dimension look-up table) techniques for the mitigation of HPAs' (high power amplifiers') memory effects when transmitting WCDMA wideband signal. On the basis of the previous method, an improved two-dimensional LUT indexing method for HPA predistortion with memory is proposed. Simulation and experimental results show that the proposed method has more effective predistortion capabilities compared with the previous method.