HPA Pre-Distortion Based on An Improved LUT Technique

In this paper, we focus on the Look-up Table (LUT) technique for compensation of HPA nonlinear distortion. An improved LUT method is proposed with better performance compared with the conventional LUT technique in terms of convergence speeds, BER and total degradation (TD). It can get over 8dB gain in out-of-band spectrum re-growth suppression and about 0.3dB BER performance gain than the conventional LUT technique under the same simulation conditions. Also, we propose an actual application of HPA with pre-distorter in OFDM transmitte.