@article{ajeee2014233,
author={{Feuvrie, B. and Diop, M. and Wang, Y.},
title={Efficient Baseband Digital Predistorter Using Lut for Power Amplifier (PA) with Memory Effect},
journal={American Journal of Electrical and Electronic Engineering},
volume={2},
number={3},
pages={72--81},
year={2014},
url={http://pubs.sciepub.com/ajeee/2/3/3},
abstract={Modern communications systems will have to integrate multiple radio technologies to support a large number of wireless standards (WLAN, WPANˇ­). This system should operate with third generation (3G) air interface standards, where non constant envelope modulation formats (MQAM, OFDMˇ­) are required. The amplification of a modulated signal with large variation of envelope introduces distortions when the input-output characteristic is nonlinear. These distortions are particularly important when the power amplifier (PA) has non-linear memory effects with a wideband signal. The technique proposed in this paper aims to fight against this phenomenon by optimizing the method developed in the laboratory  for a real-time implementation. This technique is able to provide exactly the reverse characteristics of a PA modeled by a Hammerstein model in base band. Its principle is to find the largest real root of a polynomial related to the analytical model of the PA and to the input signal to be amplified to calculate a pre-distorted signal. To reduce significantly the computation time, an implementation by the LUT method is proposed. This method uses two pre-distortion principles and can be implemented on a FPGA board with table bases method known for simplicity including in the same way the correction of the memory effect.},
doi={10.12691/ajeee-2-3-3}
publisher={Science and Education Publishing}
}