Title: Digital feedforward compensation scheme for the non-linear power amplifier with memory

Authors: Changsoo Eun, Junsu Kwon

Addresses: Department of Information Communications Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon, Korea. ' Department of Information Communications Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon, Korea

Abstract: In wideband communication systems, memory effect manifests itself as inter-symbol interference, which combined with the non-linearity, complicates the non-linear compensation. We propose a digital feedforward linearisation method to compensate for the non-linearity of a power amplifier (PA) with memory. The PA is modelled with a Wiener model, which is a linear time-invariant system followed by a memoryless non-linear system. The advantage of the proposed scheme is that the compensation is implemented in baseband by using a digital signal processing technique. Simulation results are given to verify the validity of the proposed scheme.

Keywords: DSP; digital signal processing; feedforward compensation; power amplifiers; nonlinear systems; wideband communications; memory effect; modelling; simulation.

DOI: 10.1504/IJISTA.2010.036586

International Journal of Intelligent Systems Technologies and Applications, 2010 Vol.9 No.3/4, pp.326 - 334

Published online: 04 Nov 2010 *

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