A New Adaptive Proportionate Algorithm for Improving the Performance of Precorrection in DVB

High power amplification of linear modulation schemes which exhibit fluctuating envelopes, invariably leads to the generation of distortion and intermodulation products. In this paper, an adaptive pre-distortion technique is introduced to counter-balance the AM/AM and AM/PM nonlinear effects of the transmit power amplifier. The proposed adaptation method is based on the previous segment variable step-size proportionate normalized least mean squares (SVS-PNLMS) algorithm introduced in [1]. The proposed algorithm has low complexity and guarantees a fast convergence. Simulation results reveal that the proposed algorithm outperforms other counterparts like NLMS (Normalized Least Mean Squares) algorithm.