Journal of Korea Society of Digital Industry and Information Management (디지털산업정보학회논문지)

Korea Society of Digital Industry and Information Management (디지털산업정보학회)
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Study on an Enhanced Adaptive Pre-distorter Linearizing Nonlinear Distortions of a High Power Amplifier

고출력 증폭기의 비선형 왜곡을 선형화하는 향상된 적응 사전 왜곡기에 대한 연구

  • 권오상 (고려사이버대학교 전기전자공학과)
  • Received : 2014.09.01
  • Accepted : 2014.10.01
  • Published : 2014.12.30
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Abstract

A high power amplifier(HPA) has widely been used in wireless communications. In order to have a maximum power efficiency, the HPA uses a saturation domain having nonlinear characteristics, which generates nonlinear distortions to decrease the transmission efficiency. In order to solve this problem, various methods to linearize HPA have been reported until now, and the pre-distorter method is very attractive among them. In this paper, a new enhanced adaptive pre-distorter method was proposed to be applied for compensating nonlinear distortions of HPA. Through computer simulations as well as the analytical analysis, it could be shown that it is possible for both conventional adaptive pre-distorter and proposed adaptive pre-distorter, to be applied for linearizing HPA. Also, the simulations results demonstrated that the proposed adaptive pre-distorter may have faster convergence speed and better capability of compensating the nonlinear distortion than the conventional adaptive pre-distorter with nearly equal computation complexity.

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References

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