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

  • Authors:

  • Junsu Kwon;Changsoo Eun

  • Affiliations:

  • 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

  • Venue:
  • International Journal of Intelligent Systems Technologies and Applications
  • Year:
  • 2010

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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.