Wuhan University Journal of Natural Sciences

, Volume 22, Issue 5, pp 395–401 | Cite as

Linear power amplifier modeling based on predistortion technology

Article

Abstract

Different power amplifier (PA) models have their own effects on PA linearization. In this paper, the nonlinear characteristic of the radio frequency power amplifier (RF PA) is simulated based on the two models combining predistortion technology, and the nonlinear effects of the two models are analyzed, respectively. The simulation results show that Power Series model normalized mean square error (NMSE) is −37.8 dB, which is less than Power Series model −30.4 dB before loading predistortion technology. NMSE of the two systems are −23.4 dB and −26.0 dB respectively, while Saleh model compensates better than the Power Series model combing predistortion technology. The error vector magnitude (EVM) of Power Series model is only 6.75%, whereas the Saleh model EVM is 9.99%, indicating that Power Series model can better describe the nonlinear characteristic of PA. It will have a positive effect on improving the power utilization of wireless communication system.

Key words

predistortion technology nonlinear characteristic power amplifier (PA) 

CLC number

TN 72 

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Copyright information

© Wuhan University and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Yulin Xie
    • 1
    • 2
  • Wei Xie
    • 1
  • Long Chen
    • 3
  • Jie Xiong
    • 1
  • Gui Lei
    • 1
  1. 1.School of Electric InformationHuanggang Normal UniversityHuanggang, HubeiChina
  2. 2.Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan, HubeiChina
  3. 3.National Time Service CenterChinese Academy of SciencesXi’an, ShaanxiChina

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